use adw::prelude::*;
use outlay_core::db::Database;
use std::rc::Rc;

use crate::budgets_view::BudgetsView;
use crate::charts_view::ChartsView;
use crate::history_view::HistoryView;
use crate::log_view::LogView;

pub struct MainWindow {
    pub window: adw::ApplicationWindow,
    pub split_view: adw::NavigationSplitView,
    pub content_stack: gtk::Stack,
    pub log_view: LogView,
}

struct SidebarItem {
    id: &'static str,
    label: &'static str,
    icon: &'static str,
}

const SIDEBAR_ITEMS: &[SidebarItem] = &[
    SidebarItem { id: "log",       label: "Log",       icon: "list-add-symbolic" },
    SidebarItem { id: "history",   label: "History",   icon: "document-open-recent-symbolic" },
    SidebarItem { id: "charts",    label: "Charts",    icon: "utilities-system-monitor-symbolic" },
    SidebarItem { id: "budgets",   label: "Budgets",   icon: "wallet2-symbolic" },
    SidebarItem { id: "recurring", label: "Recurring", icon: "view-refresh-symbolic" },
    SidebarItem { id: "settings",  label: "Settings",  icon: "emblem-system-symbolic" },
];

impl MainWindow {
    pub fn new(app: &adw::Application, db: Rc<Database>) -> Self {
        let content_stack = gtk::Stack::new();
        content_stack.set_transition_type(gtk::StackTransitionType::Crossfade);

        // Log view
        let log_view = LogView::new(db.clone(), app);
        let log_scroll = gtk::ScrolledWindow::builder()
            .hscrollbar_policy(gtk::PolicyType::Never)
            .child(&log_view.container)
            .build();
        content_stack.add_named(&log_scroll, Some("log"));

        // History view
        let history_view = HistoryView::new(db.clone());
        let history_scroll = gtk::ScrolledWindow::builder()
            .hscrollbar_policy(gtk::PolicyType::Never)
            .child(&history_view.container)
            .build();
        content_stack.add_named(&history_scroll, Some("history"));

        // Charts view
        let charts_view = ChartsView::new(db.clone());
        content_stack.add_named(&charts_view.container, Some("charts"));

        // Budgets view
        let budgets_view = BudgetsView::new(db.clone());
        content_stack.add_named(&budgets_view.container, Some("budgets"));

        // Remaining pages are placeholders for now
        for item in &SIDEBAR_ITEMS[4..] {
            let page = adw::StatusPage::builder()
                .title(item.label)
                .icon_name(item.icon)
                .build();
            content_stack.add_named(&page, Some(item.id));
        }

        let sidebar_list = gtk::ListBox::new();
        sidebar_list.set_selection_mode(gtk::SelectionMode::Single);
        sidebar_list.add_css_class("navigation-sidebar");

        for item in SIDEBAR_ITEMS {
            let row = Self::make_sidebar_row(item);
            sidebar_list.append(&row);
        }

        let content_stack_ref = content_stack.clone();
        sidebar_list.connect_row_selected(move |_, row| {
            if let Some(row) = row {
                let idx = row.index() as usize;
                if idx < SIDEBAR_ITEMS.len() {
                    content_stack_ref.set_visible_child_name(SIDEBAR_ITEMS[idx].id);
                }
            }
        });

        // Select the first row by default
        if let Some(first_row) = sidebar_list.row_at_index(0) {
            sidebar_list.select_row(Some(&first_row));
        }

        let sidebar_scroll = gtk::ScrolledWindow::builder()
            .hscrollbar_policy(gtk::PolicyType::Never)
            .vexpand(true)
            .child(&sidebar_list)
            .build();

        let sidebar_toolbar = adw::ToolbarView::new();
        sidebar_toolbar.add_top_bar(&adw::HeaderBar::new());
        sidebar_toolbar.set_content(Some(&sidebar_scroll));

        let sidebar_page = adw::NavigationPage::builder()
            .title("Outlay")
            .child(&sidebar_toolbar)
            .build();

        let content_toolbar = adw::ToolbarView::new();
        content_toolbar.add_top_bar(&adw::HeaderBar::new());
        content_toolbar.set_content(Some(&content_stack));

        let content_page = adw::NavigationPage::builder()
            .title("Outlay")
            .child(&content_toolbar)
            .build();

        let split_view = adw::NavigationSplitView::new();
        split_view.set_sidebar(Some(&sidebar_page));
        split_view.set_content(Some(&content_page));

        let window = adw::ApplicationWindow::builder()
            .application(app)
            .title("Outlay")
            .default_width(900)
            .default_height(600)
            .content(&split_view)
            .build();

        MainWindow {
            window,
            split_view,
            content_stack,
            log_view,
        }
    }

    fn make_sidebar_row(item: &SidebarItem) -> gtk::ListBoxRow {
        let hbox = gtk::Box::new(gtk::Orientation::Horizontal, 12);
        hbox.set_margin_top(8);
        hbox.set_margin_bottom(8);
        hbox.set_margin_start(12);
        hbox.set_margin_end(12);

        let icon = gtk::Image::from_icon_name(item.icon);
        let label = gtk::Label::new(Some(item.label));
        label.set_halign(gtk::Align::Start);

        hbox.append(&icon);
        hbox.append(&label);

        let row = gtk::ListBoxRow::new();
        row.set_child(Some(&hbox));
        row
    }
}