use pixstrip_core::operations::resize::resize_image;
use pixstrip_core::operations::ResizeConfig;
use pixstrip_core::types::Dimensions;

fn create_test_image(width: u32, height: u32) -> image::DynamicImage {
    let img = image::RgbImage::from_fn(width, height, |x, y| {
        image::Rgb([(x % 256) as u8, (y % 256) as u8, 128])
    });
    image::DynamicImage::ImageRgb8(img)
}

#[test]
fn resize_by_width() {
    let img = create_test_image(4000, 3000);
    let config = ResizeConfig::ByWidth(1200);
    let result = resize_image(&img, &config).unwrap();
    assert_eq!(result.width(), 1200);
    assert_eq!(result.height(), 900);
}

#[test]
fn resize_by_height() {
    let img = create_test_image(4000, 3000);
    let config = ResizeConfig::ByHeight(600);
    let result = resize_image(&img, &config).unwrap();
    assert_eq!(result.width(), 800);
    assert_eq!(result.height(), 600);
}

#[test]
fn resize_fit_in_box() {
    let img = create_test_image(4000, 3000);
    let config = ResizeConfig::FitInBox {
        max: Dimensions { width: 1920, height: 1080 },
        allow_upscale: false,
    };
    let result = resize_image(&img, &config).unwrap();
    assert_eq!(result.width(), 1440);
    assert_eq!(result.height(), 1080);
}

#[test]
fn resize_no_upscale() {
    let img = create_test_image(800, 600);
    let config = ResizeConfig::FitInBox {
        max: Dimensions { width: 1920, height: 1080 },
        allow_upscale: false,
    };
    let result = resize_image(&img, &config).unwrap();
    assert_eq!(result.width(), 800);
    assert_eq!(result.height(), 600);
}

#[test]
fn resize_exact() {
    let img = create_test_image(4000, 3000);
    let config = ResizeConfig::Exact(Dimensions { width: 1080, height: 1080 });
    let result = resize_image(&img, &config).unwrap();
    assert_eq!(result.width(), 1080);
    assert_eq!(result.height(), 1080);
}