use crate::AppState;
use crate::os_detection;
use rusqlite::params;
use serde::{Deserialize, Serialize};
use tauri::{Manager, State};

#[derive(Debug, Serialize, Deserialize)]
pub struct Client {
    pub id: Option<i64>,
    pub name: String,
    pub email: Option<String>,
    pub address: Option<String>,
    pub company: Option<String>,
    pub phone: Option<String>,
    pub tax_id: Option<String>,
    pub payment_terms: Option<String>,
    pub notes: Option<String>,
}

#[derive(Debug, Serialize, Deserialize)]
pub struct Project {
    pub id: Option<i64>,
    pub client_id: Option<i64>,
    pub name: String,
    pub hourly_rate: f64,
    pub color: String,
    pub archived: bool,
    pub budget_hours: Option<f64>,
    pub budget_amount: Option<f64>,
    pub rounding_override: Option<i32>,
}

#[derive(Debug, Serialize, Deserialize)]
pub struct Task {
    pub id: Option<i64>,
    pub project_id: i64,
    pub name: String,
}

#[derive(Debug, Serialize, Deserialize)]
pub struct TimeEntry {
    pub id: Option<i64>,
    pub project_id: i64,
    pub task_id: Option<i64>,
    pub description: Option<String>,
    pub start_time: String,
    pub end_time: Option<String>,
    pub duration: i64,
}

#[derive(Debug, Serialize, Deserialize)]
pub struct Invoice {
    pub id: Option<i64>,
    pub client_id: i64,
    pub invoice_number: String,
    pub date: String,
    pub due_date: Option<String>,
    pub subtotal: f64,
    pub tax_rate: f64,
    pub tax_amount: f64,
    pub discount: f64,
    pub total: f64,
    pub notes: Option<String>,
    pub status: String,
    pub template_id: Option<String>,
}

// Client commands
#[tauri::command]
pub fn get_clients(state: State<AppState>) -> Result<Vec<Client>, String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    let mut stmt = conn.prepare(
        "SELECT id, name, email, address, company, phone, tax_id, payment_terms, notes FROM clients ORDER BY name"
    ).map_err(|e| e.to_string())?;
    let clients = stmt.query_map([], |row| {
        Ok(Client {
            id: Some(row.get(0)?),
            name: row.get(1)?,
            email: row.get(2)?,
            address: row.get(3)?,
            company: row.get(4)?,
            phone: row.get(5)?,
            tax_id: row.get(6)?,
            payment_terms: row.get(7)?,
            notes: row.get(8)?,
        })
    }).map_err(|e| e.to_string())?;
    clients.collect::<Result<Vec<_>, _>>().map_err(|e| e.to_string())
}

#[tauri::command]
pub fn create_client(state: State<AppState>, client: Client) -> Result<i64, String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    conn.execute(
        "INSERT INTO clients (name, email, address, company, phone, tax_id, payment_terms, notes) VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8)",
        params![client.name, client.email, client.address, client.company, client.phone, client.tax_id, client.payment_terms, client.notes],
    ).map_err(|e| e.to_string())?;
    Ok(conn.last_insert_rowid())
}

#[tauri::command]
pub fn update_client(state: State<AppState>, client: Client) -> Result<(), String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    conn.execute(
        "UPDATE clients SET name = ?1, email = ?2, address = ?3, company = ?4, phone = ?5, tax_id = ?6, payment_terms = ?7, notes = ?8 WHERE id = ?9",
        params![client.name, client.email, client.address, client.company, client.phone, client.tax_id, client.payment_terms, client.notes, client.id],
    ).map_err(|e| e.to_string())?;
    Ok(())
}

#[tauri::command]
pub fn delete_client(state: State<AppState>, id: i64) -> Result<(), String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    conn.execute("DELETE FROM clients WHERE id = ?1", params![id]).map_err(|e| e.to_string())?;
    Ok(())
}

// Project commands
#[tauri::command]
pub fn get_projects(state: State<AppState>) -> Result<Vec<Project>, String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    let mut stmt = conn.prepare(
        "SELECT id, client_id, name, hourly_rate, color, archived, budget_hours, budget_amount, rounding_override FROM projects ORDER BY name"
    ).map_err(|e| e.to_string())?;
    let projects = stmt.query_map([], |row| {
        Ok(Project {
            id: Some(row.get(0)?),
            client_id: row.get(1)?,
            name: row.get(2)?,
            hourly_rate: row.get(3)?,
            color: row.get(4)?,
            archived: row.get::<_, i32>(5)? != 0,
            budget_hours: row.get(6)?,
            budget_amount: row.get(7)?,
            rounding_override: row.get(8)?,
        })
    }).map_err(|e| e.to_string())?;
    projects.collect::<Result<Vec<_>, _>>().map_err(|e| e.to_string())
}

#[tauri::command]
pub fn create_project(state: State<AppState>, project: Project) -> Result<i64, String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    conn.execute(
        "INSERT INTO projects (client_id, name, hourly_rate, color, archived, budget_hours, budget_amount, rounding_override) VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8)",
        params![project.client_id, project.name, project.hourly_rate, project.color, project.archived as i32, project.budget_hours, project.budget_amount, project.rounding_override],
    ).map_err(|e| e.to_string())?;
    Ok(conn.last_insert_rowid())
}

#[tauri::command]
pub fn update_project(state: State<AppState>, project: Project) -> Result<(), String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    conn.execute(
        "UPDATE projects SET client_id = ?1, name = ?2, hourly_rate = ?3, color = ?4, archived = ?5, budget_hours = ?6, budget_amount = ?7, rounding_override = ?8 WHERE id = ?9",
        params![project.client_id, project.name, project.hourly_rate, project.color, project.archived as i32, project.budget_hours, project.budget_amount, project.rounding_override, project.id],
    ).map_err(|e| e.to_string())?;
    Ok(())
}

#[tauri::command]
pub fn delete_project(state: State<AppState>, id: i64) -> Result<(), String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    conn.execute("DELETE FROM tracked_apps WHERE project_id = ?1", params![id]).map_err(|e| e.to_string())?;
    conn.execute("DELETE FROM projects WHERE id = ?1", params![id]).map_err(|e| e.to_string())?;
    Ok(())
}

// Task commands
#[tauri::command]
pub fn get_tasks(state: State<AppState>, project_id: i64) -> Result<Vec<Task>, String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    let mut stmt = conn.prepare("SELECT id, project_id, name FROM tasks WHERE project_id = ?1 ORDER BY name").map_err(|e| e.to_string())?;
    let tasks = stmt.query_map(params![project_id], |row| {
        Ok(Task {
            id: Some(row.get(0)?),
            project_id: row.get(1)?,
            name: row.get(2)?,
        })
    }).map_err(|e| e.to_string())?;
    tasks.collect::<Result<Vec<_>, _>>().map_err(|e| e.to_string())
}

#[tauri::command]
pub fn create_task(state: State<AppState>, task: Task) -> Result<i64, String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    conn.execute(
        "INSERT INTO tasks (project_id, name) VALUES (?1, ?2)",
        params![task.project_id, task.name],
    ).map_err(|e| e.to_string())?;
    Ok(conn.last_insert_rowid())
}

#[tauri::command]
pub fn delete_task(state: State<AppState>, id: i64) -> Result<(), String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    conn.execute("DELETE FROM tasks WHERE id = ?1", params![id]).map_err(|e| e.to_string())?;
    Ok(())
}

// Time entry commands
#[tauri::command]
pub fn get_time_entries(state: State<AppState>, start_date: Option<String>, end_date: Option<String>) -> Result<Vec<TimeEntry>, String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    let query = match (start_date, end_date) {
        (Some(start), Some(end)) => {
            let mut stmt = conn.prepare(
                "SELECT id, project_id, task_id, description, start_time, end_time, duration
                 FROM time_entries
                 WHERE date(start_time) >= date(?1) AND date(start_time) <= date(?2)
                 ORDER BY start_time DESC"
            ).map_err(|e| e.to_string())?;
            let rows = stmt.query_map(params![start, end], |row| {
                Ok(TimeEntry {
                    id: Some(row.get(0)?),
                    project_id: row.get(1)?,
                    task_id: row.get(2)?,
                    description: row.get(3)?,
                    start_time: row.get(4)?,
                    end_time: row.get(5)?,
                    duration: row.get(6)?,
                })
            }).map_err(|e| e.to_string())?;
            rows.collect::<Result<Vec<_>, _>>().map_err(|e| e.to_string())?
        }
        _ => {
            let mut stmt = conn.prepare(
                "SELECT id, project_id, task_id, description, start_time, end_time, duration
                 FROM time_entries ORDER BY start_time DESC LIMIT 100"
            ).map_err(|e| e.to_string())?;
            let rows = stmt.query_map([], |row| {
                Ok(TimeEntry {
                    id: Some(row.get(0)?),
                    project_id: row.get(1)?,
                    task_id: row.get(2)?,
                    description: row.get(3)?,
                    start_time: row.get(4)?,
                    end_time: row.get(5)?,
                    duration: row.get(6)?,
                })
            }).map_err(|e| e.to_string())?;
            rows.collect::<Result<Vec<_>, _>>().map_err(|e| e.to_string())?
        }
    };
    Ok(query)
}

#[tauri::command]
pub fn create_time_entry(state: State<AppState>, entry: TimeEntry) -> Result<i64, String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    conn.execute(
        "INSERT INTO time_entries (project_id, task_id, description, start_time, end_time, duration)
         VALUES (?1, ?2, ?3, ?4, ?5, ?6)",
        params![entry.project_id, entry.task_id, entry.description, entry.start_time, entry.end_time, entry.duration],
    ).map_err(|e| e.to_string())?;
    Ok(conn.last_insert_rowid())
}

#[tauri::command]
pub fn update_time_entry(state: State<AppState>, entry: TimeEntry) -> Result<(), String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    conn.execute(
        "UPDATE time_entries SET project_id = ?1, task_id = ?2, description = ?3,
         start_time = ?4, end_time = ?5, duration = ?6 WHERE id = ?7",
        params![entry.project_id, entry.task_id, entry.description, entry.start_time, entry.end_time, entry.duration, entry.id],
    ).map_err(|e| e.to_string())?;
    Ok(())
}

#[tauri::command]
pub fn delete_time_entry(state: State<AppState>, id: i64) -> Result<(), String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    conn.execute("DELETE FROM time_entries WHERE id = ?1", params![id]).map_err(|e| e.to_string())?;
    Ok(())
}

// Reports
#[tauri::command]
pub fn get_reports(state: State<AppState>, start_date: String, end_date: String) -> Result<serde_json::Value, String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;

    // Total hours
    let total: i64 = conn.query_row(
        "SELECT COALESCE(SUM(duration), 0) FROM time_entries
         WHERE date(start_time) >= date(?1) AND date(start_time) <= date(?2)",
        params![start_date, end_date],
        |row| row.get(0),
    ).map_err(|e| e.to_string())?;

    // By project - include project_id so frontend can look up name/color/rate
    let mut stmt = conn.prepare(
        "SELECT p.id, p.name, p.color, SUM(t.duration) as total_duration
         FROM time_entries t
         JOIN projects p ON t.project_id = p.id
         WHERE date(t.start_time) >= date(?1) AND date(t.start_time) <= date(?2)
         GROUP BY p.id
         ORDER BY total_duration DESC"
    ).map_err(|e| e.to_string())?;

    let by_project: Vec<serde_json::Value> = stmt.query_map(params![start_date, end_date], |row| {
        Ok(serde_json::json!({
            "project_id": row.get::<_, i64>(0)?,
            "name": row.get::<_, String>(1)?,
            "color": row.get::<_, String>(2)?,
            "total_seconds": row.get::<_, i64>(3)?
        }))
    }).map_err(|e| e.to_string())?
    .collect::<Result<Vec<_>, _>>().map_err(|e| e.to_string())?;

    Ok(serde_json::json!({
        "totalSeconds": total,
        "byProject": by_project
    }))
}

// Invoice commands
#[tauri::command]
pub fn create_invoice(state: State<AppState>, invoice: Invoice) -> Result<i64, String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    conn.execute(
        "INSERT INTO invoices (client_id, invoice_number, date, due_date, subtotal, tax_rate, tax_amount, discount, total, notes, status, template_id)
         VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11, ?12)",
        params![invoice.client_id, invoice.invoice_number, invoice.date, invoice.due_date,
                invoice.subtotal, invoice.tax_rate, invoice.tax_amount, invoice.discount,
                invoice.total, invoice.notes, invoice.status, invoice.template_id],
    ).map_err(|e| e.to_string())?;
    Ok(conn.last_insert_rowid())
}

#[tauri::command]
pub fn get_invoices(state: State<AppState>) -> Result<Vec<Invoice>, String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    let mut stmt = conn.prepare(
        "SELECT id, client_id, invoice_number, date, due_date, subtotal, tax_rate, tax_amount, discount, total, notes, status, template_id
         FROM invoices ORDER BY date DESC"
    ).map_err(|e| e.to_string())?;
    let invoices = stmt.query_map([], |row| {
        Ok(Invoice {
            id: Some(row.get(0)?),
            client_id: row.get(1)?,
            invoice_number: row.get(2)?,
            date: row.get(3)?,
            due_date: row.get(4)?,
            subtotal: row.get(5)?,
            tax_rate: row.get(6)?,
            tax_amount: row.get(7)?,
            discount: row.get(8)?,
            total: row.get(9)?,
            notes: row.get(10)?,
            status: row.get(11)?,
            template_id: row.get(12)?,
        })
    }).map_err(|e| e.to_string())?;
    invoices.collect::<Result<Vec<_>, _>>().map_err(|e| e.to_string())
}

#[tauri::command]
pub fn update_invoice(state: State<AppState>, invoice: Invoice) -> Result<(), String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    conn.execute(
        "UPDATE invoices SET client_id = ?1, invoice_number = ?2, date = ?3, due_date = ?4,
         subtotal = ?5, tax_rate = ?6, tax_amount = ?7, discount = ?8, total = ?9, notes = ?10, status = ?11, template_id = ?12
         WHERE id = ?13",
        params![invoice.client_id, invoice.invoice_number, invoice.date, invoice.due_date,
                invoice.subtotal, invoice.tax_rate, invoice.tax_amount, invoice.discount,
                invoice.total, invoice.notes, invoice.status, invoice.template_id, invoice.id],
    ).map_err(|e| e.to_string())?;
    Ok(())
}

#[tauri::command]
pub fn delete_invoice(state: State<AppState>, id: i64) -> Result<(), String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    conn.execute("DELETE FROM invoice_items WHERE invoice_id = ?1", params![id]).map_err(|e| e.to_string())?;
    conn.execute("DELETE FROM invoices WHERE id = ?1", params![id]).map_err(|e| e.to_string())?;
    Ok(())
}

#[tauri::command]
pub fn update_invoice_template(state: State<AppState>, id: i64, template_id: String) -> Result<(), String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    conn.execute(
        "UPDATE invoices SET template_id = ?1 WHERE id = ?2",
        params![template_id, id],
    ).map_err(|e| e.to_string())?;
    Ok(())
}

// Invoice items
#[derive(Debug, Serialize, Deserialize)]
pub struct InvoiceItem {
    pub id: Option<i64>,
    pub invoice_id: i64,
    pub description: String,
    pub quantity: f64,
    pub rate: f64,
    pub amount: f64,
    pub time_entry_id: Option<i64>,
}

#[tauri::command]
pub fn get_invoice_items(state: State<AppState>, invoice_id: i64) -> Result<Vec<InvoiceItem>, String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    let mut stmt = conn.prepare(
        "SELECT id, invoice_id, description, quantity, rate, amount, time_entry_id
         FROM invoice_items WHERE invoice_id = ?1 ORDER BY id"
    ).map_err(|e| e.to_string())?;
    let items = stmt.query_map(params![invoice_id], |row| {
        Ok(InvoiceItem {
            id: Some(row.get(0)?),
            invoice_id: row.get(1)?,
            description: row.get(2)?,
            quantity: row.get(3)?,
            rate: row.get(4)?,
            amount: row.get(5)?,
            time_entry_id: row.get(6)?,
        })
    }).map_err(|e| e.to_string())?;
    items.collect::<Result<Vec<_>, _>>().map_err(|e| e.to_string())
}

#[tauri::command]
pub fn create_invoice_item(state: State<AppState>, item: InvoiceItem) -> Result<i64, String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    conn.execute(
        "INSERT INTO invoice_items (invoice_id, description, quantity, rate, amount, time_entry_id)
         VALUES (?1, ?2, ?3, ?4, ?5, ?6)",
        params![item.invoice_id, item.description, item.quantity, item.rate, item.amount, item.time_entry_id],
    ).map_err(|e| e.to_string())?;
    Ok(conn.last_insert_rowid())
}

#[tauri::command]
pub fn delete_invoice_items(state: State<AppState>, invoice_id: i64) -> Result<(), String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    conn.execute("DELETE FROM invoice_items WHERE invoice_id = ?1", params![invoice_id]).map_err(|e| e.to_string())?;
    Ok(())
}

// Settings commands
#[tauri::command]
pub fn get_settings(state: State<AppState>) -> Result<std::collections::HashMap<String, String>, String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    let mut stmt = conn.prepare("SELECT key, value FROM settings").map_err(|e| e.to_string())?;
    let settings = stmt.query_map([], |row| {
        Ok((row.get::<_, String>(0)?, row.get::<_, String>(1)?))
    }).map_err(|e| e.to_string())?;

    let mut result = std::collections::HashMap::new();
    for setting in settings {
        let (key, value) = setting.map_err(|e| e.to_string())?;
        result.insert(key, value);
    }
    Ok(result)
}

#[tauri::command]
pub fn update_settings(state: State<AppState>, key: String, value: String) -> Result<(), String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    conn.execute(
        "INSERT OR REPLACE INTO settings (key, value) VALUES (?1, ?2)",
        params![key, value],
    ).map_err(|e| e.to_string())?;
    Ok(())
}

// Export all data as JSON
#[tauri::command]
pub fn export_data(state: State<AppState>) -> Result<serde_json::Value, String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;

    let clients = {
        let mut stmt = conn.prepare("SELECT id, name, email, address, company, phone, tax_id, payment_terms, notes FROM clients").map_err(|e| e.to_string())?;
        let rows: Vec<serde_json::Value> = stmt.query_map([], |row| {
            Ok(serde_json::json!({
                "id": row.get::<_, i64>(0)?,
                "name": row.get::<_, String>(1)?,
                "email": row.get::<_, Option<String>>(2)?,
                "address": row.get::<_, Option<String>>(3)?,
                "company": row.get::<_, Option<String>>(4)?,
                "phone": row.get::<_, Option<String>>(5)?,
                "tax_id": row.get::<_, Option<String>>(6)?,
                "payment_terms": row.get::<_, Option<String>>(7)?,
                "notes": row.get::<_, Option<String>>(8)?
            }))
        }).map_err(|e| e.to_string())?.collect::<Result<Vec<_>, _>>().map_err(|e| e.to_string())?;
        rows
    };

    let projects = {
        let mut stmt = conn.prepare("SELECT id, client_id, name, hourly_rate, color, archived, budget_hours, budget_amount, rounding_override FROM projects").map_err(|e| e.to_string())?;
        let rows: Vec<serde_json::Value> = stmt.query_map([], |row| {
            Ok(serde_json::json!({
                "id": row.get::<_, i64>(0)?,
                "client_id": row.get::<_, Option<i64>>(1)?,
                "name": row.get::<_, String>(2)?,
                "hourly_rate": row.get::<_, f64>(3)?,
                "color": row.get::<_, String>(4)?,
                "archived": row.get::<_, i32>(5)? != 0,
                "budget_hours": row.get::<_, Option<f64>>(6)?,
                "budget_amount": row.get::<_, Option<f64>>(7)?,
                "rounding_override": row.get::<_, Option<i32>>(8)?
            }))
        }).map_err(|e| e.to_string())?.collect::<Result<Vec<_>, _>>().map_err(|e| e.to_string())?;
        rows
    };

    let time_entries = {
        let mut stmt = conn.prepare("SELECT id, project_id, task_id, description, start_time, end_time, duration FROM time_entries").map_err(|e| e.to_string())?;
        let rows: Vec<serde_json::Value> = stmt.query_map([], |row| {
            Ok(serde_json::json!({
                "id": row.get::<_, i64>(0)?,
                "project_id": row.get::<_, i64>(1)?,
                "task_id": row.get::<_, Option<i64>>(2)?,
                "description": row.get::<_, Option<String>>(3)?,
                "start_time": row.get::<_, String>(4)?,
                "end_time": row.get::<_, Option<String>>(5)?,
                "duration": row.get::<_, i64>(6)?
            }))
        }).map_err(|e| e.to_string())?.collect::<Result<Vec<_>, _>>().map_err(|e| e.to_string())?;
        rows
    };

    let invoices = {
        let mut stmt = conn.prepare("SELECT id, client_id, invoice_number, date, due_date, subtotal, tax_rate, tax_amount, discount, total, notes, status FROM invoices").map_err(|e| e.to_string())?;
        let rows: Vec<serde_json::Value> = stmt.query_map([], |row| {
            Ok(serde_json::json!({
                "id": row.get::<_, i64>(0)?,
                "client_id": row.get::<_, i64>(1)?,
                "invoice_number": row.get::<_, String>(2)?,
                "date": row.get::<_, String>(3)?,
                "due_date": row.get::<_, Option<String>>(4)?,
                "subtotal": row.get::<_, f64>(5)?,
                "tax_rate": row.get::<_, f64>(6)?,
                "tax_amount": row.get::<_, f64>(7)?,
                "discount": row.get::<_, f64>(8)?,
                "total": row.get::<_, f64>(9)?,
                "notes": row.get::<_, Option<String>>(10)?,
                "status": row.get::<_, String>(11)?
            }))
        }).map_err(|e| e.to_string())?.collect::<Result<Vec<_>, _>>().map_err(|e| e.to_string())?;
        rows
    };

    Ok(serde_json::json!({
        "clients": clients,
        "projects": projects,
        "time_entries": time_entries,
        "invoices": invoices
    }))
}

// Clear all data
#[tauri::command]
pub fn clear_all_data(state: State<AppState>) -> Result<(), String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    conn.execute_batch(
        "DELETE FROM tracked_apps;
         DELETE FROM invoice_items;
         DELETE FROM invoices;
         DELETE FROM time_entries;
         DELETE FROM tasks;
         DELETE FROM projects;
         DELETE FROM clients;"
    ).map_err(|e| e.to_string())?;
    Ok(())
}

// Tracked Apps struct
#[derive(Debug, Serialize, Deserialize)]
pub struct TrackedApp {
    pub id: Option<i64>,
    pub project_id: i64,
    pub exe_name: String,
    pub exe_path: Option<String>,
    pub display_name: Option<String>,
}

// OS Detection commands
#[tauri::command]
pub fn get_idle_seconds() -> Result<u64, String> {
    Ok(os_detection::get_system_idle_seconds())
}

#[tauri::command]
pub fn get_visible_windows() -> Result<Vec<os_detection::WindowInfo>, String> {
    Ok(os_detection::enumerate_visible_windows())
}

#[tauri::command]
pub fn get_running_processes() -> Result<Vec<os_detection::WindowInfo>, String> {
    Ok(os_detection::enumerate_running_processes())
}

// Tracked Apps CRUD commands
#[tauri::command]
pub fn get_tracked_apps(state: State<AppState>, project_id: i64) -> Result<Vec<TrackedApp>, String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    let mut stmt = conn.prepare(
        "SELECT id, project_id, exe_name, exe_path, display_name FROM tracked_apps WHERE project_id = ?1 ORDER BY display_name"
    ).map_err(|e| e.to_string())?;
    let apps = stmt.query_map(params![project_id], |row| {
        Ok(TrackedApp {
            id: Some(row.get(0)?),
            project_id: row.get(1)?,
            exe_name: row.get(2)?,
            exe_path: row.get(3)?,
            display_name: row.get(4)?,
        })
    }).map_err(|e| e.to_string())?;
    apps.collect::<Result<Vec<_>, _>>().map_err(|e| e.to_string())
}

#[tauri::command]
pub fn add_tracked_app(state: State<AppState>, app: TrackedApp) -> Result<i64, String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    conn.execute(
        "INSERT INTO tracked_apps (project_id, exe_name, exe_path, display_name) VALUES (?1, ?2, ?3, ?4)",
        params![app.project_id, app.exe_name, app.exe_path, app.display_name],
    ).map_err(|e| e.to_string())?;
    Ok(conn.last_insert_rowid())
}

#[tauri::command]
pub fn remove_tracked_app(state: State<AppState>, id: i64) -> Result<(), String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    conn.execute("DELETE FROM tracked_apps WHERE id = ?1", params![id]).map_err(|e| e.to_string())?;
    Ok(())
}

// Tag structs and commands
#[derive(Debug, Serialize, Deserialize)]
pub struct Tag {
    pub id: Option<i64>,
    pub name: String,
    pub color: String,
}

#[tauri::command]
pub fn get_tags(state: State<AppState>) -> Result<Vec<Tag>, String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    let mut stmt = conn.prepare("SELECT id, name, color FROM tags ORDER BY name")
        .map_err(|e| e.to_string())?;
    let tags = stmt.query_map([], |row| {
        Ok(Tag {
            id: Some(row.get(0)?),
            name: row.get(1)?,
            color: row.get(2)?,
        })
    }).map_err(|e| e.to_string())?;
    tags.collect::<Result<Vec<_>, _>>().map_err(|e| e.to_string())
}

#[tauri::command]
pub fn create_tag(state: State<AppState>, tag: Tag) -> Result<i64, String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    conn.execute(
        "INSERT INTO tags (name, color) VALUES (?1, ?2)",
        params![tag.name, tag.color],
    ).map_err(|e| e.to_string())?;
    Ok(conn.last_insert_rowid())
}

#[tauri::command]
pub fn update_tag(state: State<AppState>, tag: Tag) -> Result<(), String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    conn.execute(
        "UPDATE tags SET name = ?1, color = ?2 WHERE id = ?3",
        params![tag.name, tag.color, tag.id],
    ).map_err(|e| e.to_string())?;
    Ok(())
}

#[tauri::command]
pub fn delete_tag(state: State<AppState>, id: i64) -> Result<(), String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    conn.execute("DELETE FROM entry_tags WHERE tag_id = ?1", params![id])
        .map_err(|e| e.to_string())?;
    conn.execute("DELETE FROM tags WHERE id = ?1", params![id])
        .map_err(|e| e.to_string())?;
    Ok(())
}

#[tauri::command]
pub fn get_entry_tags(state: State<AppState>, entry_id: i64) -> Result<Vec<Tag>, String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    let mut stmt = conn.prepare(
        "SELECT t.id, t.name, t.color FROM tags t
         JOIN entry_tags et ON t.id = et.tag_id
         WHERE et.entry_id = ?1 ORDER BY t.name"
    ).map_err(|e| e.to_string())?;
    let tags = stmt.query_map(params![entry_id], |row| {
        Ok(Tag {
            id: Some(row.get(0)?),
            name: row.get(1)?,
            color: row.get(2)?,
        })
    }).map_err(|e| e.to_string())?;
    tags.collect::<Result<Vec<_>, _>>().map_err(|e| e.to_string())
}

#[tauri::command]
pub fn set_entry_tags(state: State<AppState>, entry_id: i64, tag_ids: Vec<i64>) -> Result<(), String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    conn.execute("DELETE FROM entry_tags WHERE entry_id = ?1", params![entry_id])
        .map_err(|e| e.to_string())?;
    for tag_id in tag_ids {
        conn.execute(
            "INSERT INTO entry_tags (entry_id, tag_id) VALUES (?1, ?2)",
            params![entry_id, tag_id],
        ).map_err(|e| e.to_string())?;
    }
    Ok(())
}

#[tauri::command]
pub fn get_project_budget_status(state: State<AppState>, project_id: i64) -> Result<serde_json::Value, String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;

    let total_seconds: i64 = conn.query_row(
        "SELECT COALESCE(SUM(duration), 0) FROM time_entries WHERE project_id = ?1",
        params![project_id],
        |row| row.get(0),
    ).map_err(|e| e.to_string())?;

    let project_row: (Option<f64>, Option<f64>, f64) = conn.query_row(
        "SELECT budget_hours, budget_amount, hourly_rate FROM projects WHERE id = ?1",
        params![project_id],
        |row| Ok((row.get(0)?, row.get(1)?, row.get(2)?)),
    ).map_err(|e| e.to_string())?;

    let hours_used = total_seconds as f64 / 3600.0;
    let amount_used = hours_used * project_row.2;

    Ok(serde_json::json!({
        "hours_used": hours_used,
        "amount_used": amount_used,
        "budget_hours": project_row.0,
        "budget_amount": project_row.1,
        "percent_hours": project_row.0.map(|b| if b > 0.0 { (hours_used / b) * 100.0 } else { 0.0 }),
        "percent_amount": project_row.1.map(|b| if b > 0.0 { (amount_used / b) * 100.0 } else { 0.0 })
    }))
}

// Favorite structs and commands
#[derive(Debug, Serialize, Deserialize)]
pub struct Favorite {
    pub id: Option<i64>,
    pub project_id: i64,
    pub task_id: Option<i64>,
    pub description: Option<String>,
    pub sort_order: i32,
}

#[tauri::command]
pub fn get_favorites(state: State<AppState>) -> Result<Vec<Favorite>, String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    let mut stmt = conn.prepare(
        "SELECT id, project_id, task_id, description, sort_order FROM favorites ORDER BY sort_order"
    ).map_err(|e| e.to_string())?;
    let favs = stmt.query_map([], |row| {
        Ok(Favorite {
            id: Some(row.get(0)?),
            project_id: row.get(1)?,
            task_id: row.get(2)?,
            description: row.get(3)?,
            sort_order: row.get(4)?,
        })
    }).map_err(|e| e.to_string())?;
    favs.collect::<Result<Vec<_>, _>>().map_err(|e| e.to_string())
}

#[tauri::command]
pub fn create_favorite(state: State<AppState>, fav: Favorite) -> Result<i64, String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    conn.execute(
        "INSERT INTO favorites (project_id, task_id, description, sort_order) VALUES (?1, ?2, ?3, ?4)",
        params![fav.project_id, fav.task_id, fav.description, fav.sort_order],
    ).map_err(|e| e.to_string())?;
    Ok(conn.last_insert_rowid())
}

#[tauri::command]
pub fn delete_favorite(state: State<AppState>, id: i64) -> Result<(), String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    conn.execute("DELETE FROM favorites WHERE id = ?1", params![id])
        .map_err(|e| e.to_string())?;
    Ok(())
}

#[tauri::command]
pub fn reorder_favorites(state: State<AppState>, ids: Vec<i64>) -> Result<(), String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    for (i, id) in ids.iter().enumerate() {
        conn.execute(
            "UPDATE favorites SET sort_order = ?1 WHERE id = ?2",
            params![i as i32, id],
        ).map_err(|e| e.to_string())?;
    }
    Ok(())
}

// Goals command
#[tauri::command]
pub fn get_goal_progress(state: State<AppState>, today: String) -> Result<serde_json::Value, String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;

    // Today's total seconds
    let today_seconds: i64 = conn.query_row(
        "SELECT COALESCE(SUM(duration), 0) FROM time_entries WHERE date(start_time) = date(?1)",
        params![today],
        |row| row.get(0),
    ).map_err(|e| e.to_string())?;

    // This week's total seconds (Monday to Sunday, ISO week)
    let week_seconds: i64 = conn.query_row(
        "SELECT COALESCE(SUM(duration), 0) FROM time_entries
         WHERE strftime('%Y-%W', start_time) = strftime('%Y-%W', ?1)",
        params![today],
        |row| row.get(0),
    ).map_err(|e| e.to_string())?;

    // Streak: count consecutive days with entries going backwards from today
    let mut streak_days: i64 = 0;
    let mut check_date = today.clone();
    loop {
        let has_entry: i64 = conn.query_row(
            "SELECT COUNT(*) FROM time_entries WHERE date(start_time) = date(?1)",
            params![check_date],
            |row| row.get(0),
        ).map_err(|e| e.to_string())?;
        if has_entry > 0 {
            streak_days += 1;
            // Go to previous day
            check_date = conn.query_row(
                "SELECT date(?1, '-1 day')",
                params![check_date],
                |row| row.get::<_, String>(0),
            ).map_err(|e| e.to_string())?;
        } else {
            break;
        }
    }

    Ok(serde_json::json!({
        "today_seconds": today_seconds,
        "week_seconds": week_seconds,
        "streak_days": streak_days
    }))
}

// Profitability report command
#[tauri::command]
pub fn get_profitability_report(state: State<AppState>, start_date: String, end_date: String) -> Result<Vec<serde_json::Value>, String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;

    let mut stmt = conn.prepare(
        "SELECT p.id, p.name, p.color, p.hourly_rate, p.budget_hours, p.budget_amount,
                c.name as client_name,
                COALESCE(SUM(t.duration), 0) as total_seconds
         FROM projects p
         LEFT JOIN clients c ON p.client_id = c.id
         LEFT JOIN time_entries t ON t.project_id = p.id
             AND date(t.start_time) >= date(?1)
             AND date(t.start_time) <= date(?2)
         GROUP BY p.id
         ORDER BY total_seconds DESC"
    ).map_err(|e| e.to_string())?;

    let rows = stmt.query_map(params![start_date, end_date], |row| {
        let total_seconds: i64 = row.get(7)?;
        let hourly_rate: f64 = row.get(3)?;
        let hours = total_seconds as f64 / 3600.0;
        let revenue = hours * hourly_rate;
        let budget_hours: Option<f64> = row.get(4)?;
        let budget_amount: Option<f64> = row.get(5)?;

        Ok(serde_json::json!({
            "project_id": row.get::<_, i64>(0)?,
            "project_name": row.get::<_, String>(1)?,
            "color": row.get::<_, String>(2)?,
            "hourly_rate": hourly_rate,
            "client_name": row.get::<_, Option<String>>(6)?,
            "total_seconds": total_seconds,
            "hours": hours,
            "revenue": revenue,
            "budget_hours": budget_hours,
            "budget_amount": budget_amount,
            "percent_hours": budget_hours.map(|b| if b > 0.0 { (hours / b) * 100.0 } else { 0.0 }),
            "percent_amount": budget_amount.map(|b| if b > 0.0 { (revenue / b) * 100.0 } else { 0.0 })
        }))
    }).map_err(|e| e.to_string())?;

    rows.collect::<Result<Vec<_>, _>>().map_err(|e| e.to_string())
}

// Timesheet data command
#[tauri::command]
pub fn get_timesheet_data(state: State<AppState>, week_start: String) -> Result<Vec<serde_json::Value>, String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;

    // Get the 7 days of the week
    let mut days: Vec<String> = Vec::new();
    for i in 0..7 {
        let day: String = conn.query_row(
            &format!("SELECT date(?1, '+{} days')", i),
            params![week_start],
            |row| row.get(0),
        ).map_err(|e| e.to_string())?;
        days.push(day);
    }

    let mut stmt = conn.prepare(
        "SELECT p.id, p.name, p.color, t2.id as task_id, t2.name as task_name,
                date(te.start_time) as entry_date, COALESCE(SUM(te.duration), 0) as total_seconds
         FROM time_entries te
         JOIN projects p ON te.project_id = p.id
         LEFT JOIN tasks t2 ON te.task_id = t2.id
         WHERE date(te.start_time) >= date(?1)
           AND date(te.start_time) < date(?1, '+7 days')
         GROUP BY p.id, t2.id, date(te.start_time)
         ORDER BY p.name, t2.name"
    ).map_err(|e| e.to_string())?;

    let raw_rows: Vec<(i64, String, String, Option<i64>, Option<String>, String, i64)> = stmt
        .query_map(params![week_start], |row| {
            Ok((
                row.get(0)?,
                row.get(1)?,
                row.get(2)?,
                row.get(3)?,
                row.get(4)?,
                row.get(5)?,
                row.get(6)?,
            ))
        })
        .map_err(|e| e.to_string())?
        .collect::<Result<Vec<_>, _>>()
        .map_err(|e| e.to_string())?;

    // Group by project+task
    let mut grouped: std::collections::HashMap<(i64, Option<i64>), serde_json::Value> = std::collections::HashMap::new();
    for (project_id, project_name, color, task_id, task_name, entry_date, total_seconds) in &raw_rows {
        let key = (*project_id, *task_id);
        let entry = grouped.entry(key).or_insert_with(|| {
            serde_json::json!({
                "project_id": project_id,
                "project_name": project_name,
                "color": color,
                "task_id": task_id,
                "task_name": task_name,
                "days": vec![0i64; 7]
            })
        });
        // Find which day index this entry_date corresponds to
        if let Some(day_idx) = days.iter().position(|d| d == entry_date) {
            if let Some(arr) = entry.get_mut("days").and_then(|d| d.as_array_mut()) {
                arr[day_idx] = serde_json::json!(total_seconds);
            }
        }
    }

    Ok(grouped.into_values().collect())
}

// Import entries command (CSV-style: individual entries)
#[tauri::command]
pub fn import_entries(state: State<AppState>, entries: Vec<serde_json::Value>) -> Result<i64, String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    let mut count: i64 = 0;

    for entry in entries {
        let project_name = entry.get("project").and_then(|v| v.as_str()).unwrap_or("Imported");
        let description = entry.get("description").and_then(|v| v.as_str()).unwrap_or("");
        let start_time = entry.get("start_time").and_then(|v| v.as_str()).unwrap_or("");
        let end_time = entry.get("end_time").and_then(|v| v.as_str());
        let duration = entry.get("duration").and_then(|v| v.as_i64()).unwrap_or(0);

        if start_time.is_empty() {
            continue;
        }

        // Find or create project
        let project_id: i64 = match conn.query_row(
            "SELECT id FROM projects WHERE name = ?1",
            params![project_name],
            |row| row.get(0),
        ) {
            Ok(id) => id,
            Err(_) => {
                conn.execute(
                    "INSERT INTO projects (name, hourly_rate, color, archived) VALUES (?1, 0, '#F59E0B', 0)",
                    params![project_name],
                ).map_err(|e| e.to_string())?;
                conn.last_insert_rowid()
            }
        };

        conn.execute(
            "INSERT INTO time_entries (project_id, description, start_time, end_time, duration) VALUES (?1, ?2, ?3, ?4, ?5)",
            params![project_id, description, start_time, end_time, duration],
        ).map_err(|e| e.to_string())?;
        count += 1;
    }

    Ok(count)
}

// Import full JSON data (clients, projects, tasks, entries, tags)
#[tauri::command]
pub fn import_json_data(state: State<AppState>, data: serde_json::Value) -> Result<serde_json::Value, String> {
    let conn = state.db.lock().map_err(|e| e.to_string())?;
    let mut counts = serde_json::json!({
        "clients": 0,
        "projects": 0,
        "tasks": 0,
        "entries": 0,
        "tags": 0
    });

    // Import clients
    if let Some(clients) = data.get("clients").and_then(|v| v.as_array()) {
        for client in clients {
            let name = client.get("name").and_then(|v| v.as_str()).unwrap_or("");
            if name.is_empty() { continue; }
            let email = client.get("email").and_then(|v| v.as_str());
            let address = client.get("address").and_then(|v| v.as_str());
            conn.execute(
                "INSERT OR IGNORE INTO clients (name, email, address) VALUES (?1, ?2, ?3)",
                params![name, email, address],
            ).map_err(|e| e.to_string())?;
            counts["clients"] = serde_json::json!(counts["clients"].as_i64().unwrap_or(0) + 1);
        }
    }

    // Import projects
    if let Some(projects) = data.get("projects").and_then(|v| v.as_array()) {
        for project in projects {
            let name = project.get("name").and_then(|v| v.as_str()).unwrap_or("");
            if name.is_empty() { continue; }
            let hourly_rate = project.get("hourly_rate").and_then(|v| v.as_f64()).unwrap_or(0.0);
            let color = project.get("color").and_then(|v| v.as_str()).unwrap_or("#F59E0B");

            // Find client_id if client_name is provided
            let client_id: Option<i64> = project.get("client_name")
                .and_then(|v| v.as_str())
                .and_then(|client_name| {
                    conn.query_row(
                        "SELECT id FROM clients WHERE name = ?1",
                        params![client_name],
                        |row| row.get(0),
                    ).ok()
                });

            // Check if project already exists
            let exists: bool = conn.query_row(
                "SELECT COUNT(*) FROM projects WHERE name = ?1",
                params![name],
                |row| row.get::<_, i64>(0),
            ).map_err(|e| e.to_string())? > 0;

            if !exists {
                conn.execute(
                    "INSERT INTO projects (client_id, name, hourly_rate, color, archived) VALUES (?1, ?2, ?3, ?4, 0)",
                    params![client_id, name, hourly_rate, color],
                ).map_err(|e| e.to_string())?;
                counts["projects"] = serde_json::json!(counts["projects"].as_i64().unwrap_or(0) + 1);
            }
        }
    }

    // Import tags
    if let Some(tags) = data.get("tags").and_then(|v| v.as_array()) {
        for tag in tags {
            let name = tag.get("name").and_then(|v| v.as_str()).unwrap_or("");
            if name.is_empty() { continue; }
            let color = tag.get("color").and_then(|v| v.as_str()).unwrap_or("#6B7280");
            conn.execute(
                "INSERT OR IGNORE INTO tags (name, color) VALUES (?1, ?2)",
                params![name, color],
            ).map_err(|e| e.to_string())?;
            counts["tags"] = serde_json::json!(counts["tags"].as_i64().unwrap_or(0) + 1);
        }
    }

    // Import time entries
    if let Some(entries) = data.get("time_entries").and_then(|v| v.as_array()) {
        for entry in entries {
            let project_name = entry.get("project_name").and_then(|v| v.as_str()).unwrap_or("");
            let start_time = entry.get("start_time").and_then(|v| v.as_str()).unwrap_or("");
            if start_time.is_empty() { continue; }

            let project_id: Option<i64> = if !project_name.is_empty() {
                conn.query_row(
                    "SELECT id FROM projects WHERE name = ?1",
                    params![project_name],
                    |row| row.get(0),
                ).ok()
            } else {
                entry.get("project_id").and_then(|v| v.as_i64())
            };

            if let Some(pid) = project_id {
                let description = entry.get("description").and_then(|v| v.as_str());
                let end_time = entry.get("end_time").and_then(|v| v.as_str());
                let duration = entry.get("duration").and_then(|v| v.as_i64()).unwrap_or(0);

                conn.execute(
                    "INSERT INTO time_entries (project_id, description, start_time, end_time, duration) VALUES (?1, ?2, ?3, ?4, ?5)",
                    params![pid, description, start_time, end_time, duration],
                ).map_err(|e| e.to_string())?;
                counts["entries"] = serde_json::json!(counts["entries"].as_i64().unwrap_or(0) + 1);
            }
        }
    }

    Ok(counts)
}

// File save command (bypasses fs plugin scope for user-selected paths)
#[tauri::command]
pub fn save_binary_file(path: String, data: Vec<u8>) -> Result<(), String> {
    std::fs::write(&path, &data).map_err(|e| e.to_string())
}

// Mini timer window commands
#[tauri::command]
pub fn open_mini_timer(app: tauri::AppHandle) -> Result<(), String> {
    use tauri::WebviewUrl;

    if app.get_webview_window("mini-timer").is_some() {
        return Ok(());
    }

    // Load root URL — the app uses hash-based routing (createWebHashHistory),
    // so we set the hash fragment via eval after the window is created.
    let win = tauri::WebviewWindowBuilder::new(&app, "mini-timer", WebviewUrl::App(Default::default()))
        .title("Timer")
        .inner_size(300.0, 64.0)
        .always_on_top(true)
        .decorations(false)
        .resizable(false)
        .skip_taskbar(true)
        .build()
        .map_err(|e| e.to_string())?;

    // Navigate Vue Router to the mini-timer route via hash
    win.eval("window.location.hash = '/mini-timer'").ok();

    Ok(())
}

#[tauri::command]
pub fn close_mini_timer(app: tauri::AppHandle) -> Result<(), String> {
    if let Some(window) = app.get_webview_window("mini-timer") {
        window.close().map_err(|e| e.to_string())?;
    }
    // Show and focus the main window
    if let Some(main) = app.get_webview_window("main") {
        main.show().ok();
        main.set_focus().ok();
    }
    Ok(())
}

// Invoice template types and commands
#[derive(Debug, Serialize, Deserialize, Clone)]
pub struct InvoiceTemplateColors {
    pub primary: String,
    pub secondary: String,
    pub background: String,
    #[serde(rename = "headerBg")]
    pub header_bg: String,
    #[serde(rename = "headerText")]
    pub header_text: String,
    #[serde(rename = "bodyText")]
    pub body_text: String,
    #[serde(rename = "tableHeaderBg")]
    pub table_header_bg: String,
    #[serde(rename = "tableHeaderText")]
    pub table_header_text: String,
    #[serde(rename = "tableRowAlt")]
    pub table_row_alt: String,
    #[serde(rename = "tableBorder")]
    pub table_border: String,
    #[serde(rename = "totalHighlight")]
    pub total_highlight: String,
}

#[derive(Debug, Serialize, Deserialize, Clone)]
pub struct InvoiceTemplate {
    pub id: String,
    pub name: String,
    pub layout: String,
    pub category: String,
    pub description: String,
    pub colors: InvoiceTemplateColors,
}

#[tauri::command]
pub fn get_invoice_templates(state: State<AppState>) -> Result<Vec<InvoiceTemplate>, String> {
    let templates_dir = state.data_dir.join("templates");
    let mut templates: Vec<InvoiceTemplate> = Vec::new();

    if let Ok(entries) = std::fs::read_dir(&templates_dir) {
        for entry in entries.flatten() {
            let path = entry.path();
            if path.extension().and_then(|e| e.to_str()) == Some("json") {
                if let Ok(content) = std::fs::read_to_string(&path) {
                    match serde_json::from_str::<InvoiceTemplate>(&content) {
                        Ok(template) => templates.push(template),
                        Err(e) => eprintln!("Failed to parse template {:?}: {}", path, e),
                    }
                }
            }
        }
    }

    // Sort: essentials first, then creative, warm, premium; alphabetical within category
    let cat_order = |c: &str| -> u8 {
        match c { "essential" => 0, "creative" => 1, "warm" => 2, "premium" => 3, _ => 4 }
    };
    templates.sort_by(|a, b| {
        cat_order(&a.category).cmp(&cat_order(&b.category)).then(a.name.cmp(&b.name))
    });

    Ok(templates)
}

pub fn seed_default_templates(data_dir: &std::path::Path) {
    let templates_dir = data_dir.join("templates");
    std::fs::create_dir_all(&templates_dir).ok();

    // Only seed if directory is empty (no .json files)
    let has_templates = std::fs::read_dir(&templates_dir)
        .map(|entries| entries.flatten().any(|e| {
            e.path().extension().and_then(|ext| ext.to_str()) == Some("json")
        }))
        .unwrap_or(false);

    if has_templates {
        return;
    }

    let defaults = get_default_templates();
    for template in &defaults {
        let filename = format!("{}.json", template.id);
        let path = templates_dir.join(&filename);
        if let Ok(json) = serde_json::to_string_pretty(template) {
            std::fs::write(&path, json).ok();
        }
    }
}

fn get_default_templates() -> Vec<InvoiceTemplate> {
    vec![
        InvoiceTemplate {
            id: "clean".into(), name: "Clean".into(), layout: "clean".into(),
            category: "essential".into(), description: "Swiss minimalism with a single blue accent".into(),
            colors: InvoiceTemplateColors {
                primary: "#1e293b".into(), secondary: "#3b82f6".into(), background: "#ffffff".into(),
                header_bg: "#ffffff".into(), header_text: "#1e293b".into(), body_text: "#374151".into(),
                table_header_bg: "#f8fafc".into(), table_header_text: "#374151".into(),
                table_row_alt: "#f8fafc".into(), table_border: "#e5e7eb".into(), total_highlight: "#3b82f6".into(),
            },
        },
        InvoiceTemplate {
            id: "professional".into(), name: "Professional".into(), layout: "professional".into(),
            category: "essential".into(), description: "Navy header band with corporate polish".into(),
            colors: InvoiceTemplateColors {
                primary: "#1e3a5f".into(), secondary: "#2563eb".into(), background: "#ffffff".into(),
                header_bg: "#1e3a5f".into(), header_text: "#ffffff".into(), body_text: "#374151".into(),
                table_header_bg: "#1e3a5f".into(), table_header_text: "#ffffff".into(),
                table_row_alt: "#f3f4f6".into(), table_border: "#d1d5db".into(), total_highlight: "#1e3a5f".into(),
            },
        },
        InvoiceTemplate {
            id: "bold".into(), name: "Bold".into(), layout: "bold".into(),
            category: "essential".into(), description: "Large indigo block with oversized typography".into(),
            colors: InvoiceTemplateColors {
                primary: "#4f46e5".into(), secondary: "#a5b4fc".into(), background: "#ffffff".into(),
                header_bg: "#4f46e5".into(), header_text: "#ffffff".into(), body_text: "#1f2937".into(),
                table_header_bg: "#4f46e5".into(), table_header_text: "#ffffff".into(),
                table_row_alt: "#f5f3ff".into(), table_border: "#e0e7ff".into(), total_highlight: "#4f46e5".into(),
            },
        },
        InvoiceTemplate {
            id: "minimal".into(), name: "Minimal".into(), layout: "minimal".into(),
            category: "essential".into(), description: "Pure monochrome centered layout".into(),
            colors: InvoiceTemplateColors {
                primary: "#18181b".into(), secondary: "#18181b".into(), background: "#ffffff".into(),
                header_bg: "#ffffff".into(), header_text: "#18181b".into(), body_text: "#3f3f46".into(),
                table_header_bg: "#ffffff".into(), table_header_text: "#18181b".into(),
                table_row_alt: "#ffffff".into(), table_border: "#e4e4e7".into(), total_highlight: "#18181b".into(),
            },
        },
        InvoiceTemplate {
            id: "classic".into(), name: "Classic".into(), layout: "classic".into(),
            category: "essential".into(), description: "Traditional layout with burgundy accents".into(),
            colors: InvoiceTemplateColors {
                primary: "#7f1d1d".into(), secondary: "#991b1b".into(), background: "#ffffff".into(),
                header_bg: "#7f1d1d".into(), header_text: "#ffffff".into(), body_text: "#374151".into(),
                table_header_bg: "#7f1d1d".into(), table_header_text: "#ffffff".into(),
                table_row_alt: "#f5f5f4".into(), table_border: "#d6d3d1".into(), total_highlight: "#7f1d1d".into(),
            },
        },
        InvoiceTemplate {
            id: "modern".into(), name: "Modern".into(), layout: "modern".into(),
            category: "creative".into(), description: "Asymmetric header with teal accents".into(),
            colors: InvoiceTemplateColors {
                primary: "#0d9488".into(), secondary: "#14b8a6".into(), background: "#ffffff".into(),
                header_bg: "#ffffff".into(), header_text: "#0f172a".into(), body_text: "#334155".into(),
                table_header_bg: "#ffffff".into(), table_header_text: "#0d9488".into(),
                table_row_alt: "#f0fdfa".into(), table_border: "#99f6e4".into(), total_highlight: "#0d9488".into(),
            },
        },
        InvoiceTemplate {
            id: "elegant".into(), name: "Elegant".into(), layout: "elegant".into(),
            category: "creative".into(), description: "Gold double-rule accents on centered layout".into(),
            colors: InvoiceTemplateColors {
                primary: "#a16207".into(), secondary: "#ca8a04".into(), background: "#ffffff".into(),
                header_bg: "#ffffff".into(), header_text: "#422006".into(), body_text: "#57534e".into(),
                table_header_bg: "#ffffff".into(), table_header_text: "#422006".into(),
                table_row_alt: "#fefce8".into(), table_border: "#a16207".into(), total_highlight: "#a16207".into(),
            },
        },
        InvoiceTemplate {
            id: "creative".into(), name: "Creative".into(), layout: "creative".into(),
            category: "creative".into(), description: "Purple sidebar with card-style rows".into(),
            colors: InvoiceTemplateColors {
                primary: "#7c3aed".into(), secondary: "#a78bfa".into(), background: "#ffffff".into(),
                header_bg: "#ffffff".into(), header_text: "#1f2937".into(), body_text: "#374151".into(),
                table_header_bg: "#faf5ff".into(), table_header_text: "#7c3aed".into(),
                table_row_alt: "#faf5ff".into(), table_border: "#e9d5ff".into(), total_highlight: "#7c3aed".into(),
            },
        },
        InvoiceTemplate {
            id: "compact".into(), name: "Compact".into(), layout: "compact".into(),
            category: "creative".into(), description: "Data-dense layout with tight spacing".into(),
            colors: InvoiceTemplateColors {
                primary: "#475569".into(), secondary: "#64748b".into(), background: "#ffffff".into(),
                header_bg: "#ffffff".into(), header_text: "#0f172a".into(), body_text: "#334155".into(),
                table_header_bg: "#f1f5f9".into(), table_header_text: "#334155".into(),
                table_row_alt: "#f8fafc".into(), table_border: "#e2e8f0".into(), total_highlight: "#475569".into(),
            },
        },
        InvoiceTemplate {
            id: "dark".into(), name: "Dark".into(), layout: "dark".into(),
            category: "warm".into(), description: "Near-black background with cyan highlights".into(),
            colors: InvoiceTemplateColors {
                primary: "#06b6d4".into(), secondary: "#22d3ee".into(), background: "#0f172a".into(),
                header_bg: "#020617".into(), header_text: "#e2e8f0".into(), body_text: "#cbd5e1".into(),
                table_header_bg: "#020617".into(), table_header_text: "#06b6d4".into(),
                table_row_alt: "#1e293b".into(), table_border: "#334155".into(), total_highlight: "#06b6d4".into(),
            },
        },
        InvoiceTemplate {
            id: "vibrant".into(), name: "Vibrant".into(), layout: "vibrant".into(),
            category: "warm".into(), description: "Coral-to-orange gradient header band".into(),
            colors: InvoiceTemplateColors {
                primary: "#ea580c".into(), secondary: "#f97316".into(), background: "#ffffff".into(),
                header_bg: "#ea580c".into(), header_text: "#ffffff".into(), body_text: "#1f2937".into(),
                table_header_bg: "#fff7ed".into(), table_header_text: "#9a3412".into(),
                table_row_alt: "#fff7ed".into(), table_border: "#fed7aa".into(), total_highlight: "#ea580c".into(),
            },
        },
        InvoiceTemplate {
            id: "corporate".into(), name: "Corporate".into(), layout: "corporate".into(),
            category: "warm".into(), description: "Deep blue header with info bar below".into(),
            colors: InvoiceTemplateColors {
                primary: "#1e40af".into(), secondary: "#3b82f6".into(), background: "#ffffff".into(),
                header_bg: "#1e40af".into(), header_text: "#ffffff".into(), body_text: "#1f2937".into(),
                table_header_bg: "#1e40af".into(), table_header_text: "#ffffff".into(),
                table_row_alt: "#eff6ff".into(), table_border: "#bfdbfe".into(), total_highlight: "#1e40af".into(),
            },
        },
        InvoiceTemplate {
            id: "fresh".into(), name: "Fresh".into(), layout: "fresh".into(),
            category: "premium".into(), description: "Oversized watermark invoice number".into(),
            colors: InvoiceTemplateColors {
                primary: "#0284c7".into(), secondary: "#38bdf8".into(), background: "#ffffff".into(),
                header_bg: "#ffffff".into(), header_text: "#0c4a6e".into(), body_text: "#334155".into(),
                table_header_bg: "#0284c7".into(), table_header_text: "#ffffff".into(),
                table_row_alt: "#f0f9ff".into(), table_border: "#bae6fd".into(), total_highlight: "#0284c7".into(),
            },
        },
        InvoiceTemplate {
            id: "natural".into(), name: "Natural".into(), layout: "natural".into(),
            category: "premium".into(), description: "Warm beige background with terracotta accents".into(),
            colors: InvoiceTemplateColors {
                primary: "#c2703e".into(), secondary: "#d97706".into(), background: "#fdf6ec".into(),
                header_bg: "#fdf6ec".into(), header_text: "#78350f".into(), body_text: "#57534e".into(),
                table_header_bg: "#c2703e".into(), table_header_text: "#ffffff".into(),
                table_row_alt: "#fef3c7".into(), table_border: "#d6d3d1".into(), total_highlight: "#c2703e".into(),
            },
        },
        InvoiceTemplate {
            id: "statement".into(), name: "Statement".into(), layout: "statement".into(),
            category: "premium".into(), description: "Total-forward design with hero amount".into(),
            colors: InvoiceTemplateColors {
                primary: "#18181b".into(), secondary: "#be123c".into(), background: "#ffffff".into(),
                header_bg: "#ffffff".into(), header_text: "#18181b".into(), body_text: "#3f3f46".into(),
                table_header_bg: "#ffffff".into(), table_header_text: "#18181b".into(),
                table_row_alt: "#ffffff".into(), table_border: "#e4e4e7".into(), total_highlight: "#be123c".into(),
            },
        },
    ]
}