// The application icon chosen in Settings. The window icon and in-app logos
// bind to it here; Rust applies it to the tray, the Dock and the Linux
// launcher. resources/app-icon/generate.py produces the variant assets.

export enum AppIconVariant { orange, graphite, light, blue, green, purple }

export struct AppIconOption {
    variant: AppIconVariant,
    name: string,
}

export global AppIcon {
    // Rust enables the choice where the platform shows the selected icon.
    in property <bool> available: false;
    // "windows" | "macos" | "linux" | "android" | "ios".
    in property <string> platform;
    in property <AppIconVariant> variant: AppIconVariant.orange;
    out property <[AppIconOption]> options: [
        { variant: AppIconVariant.orange, name: @tr("Orange") },
        { variant: AppIconVariant.graphite, name: @tr("Graphite") },
        { variant: AppIconVariant.light, name: @tr("Light") },
        { variant: AppIconVariant.blue, name: @tr("Blue") },
        { variant: AppIconVariant.green, name: @tr("Green") },
        { variant: AppIconVariant.purple, name: @tr("Purple") },
    ];
    callback choose(AppIconVariant);

    public pure function logo(variant: AppIconVariant) -> image {
        return variant == AppIconVariant.graphite ? @image-url("../resources/app-icon/variants/graphite.svg")
            : variant == AppIconVariant.light ? @image-url("../resources/app-icon/variants/light.svg")
            : variant == AppIconVariant.blue ? @image-url("../resources/app-icon/variants/blue.svg")
            : variant == AppIconVariant.green ? @image-url("../resources/app-icon/variants/green.svg")
            : variant == AppIconVariant.purple ? @image-url("../resources/app-icon/variants/purple.svg")
            : @image-url("../resources/app-icon/flectar-mail-masked.svg");
    }

    // Window managers show this at 256 px at most, and the decoded pixels stay
    // resident for the life of the process, including while in the tray.
    public pure function window-image(variant: AppIconVariant) -> image {
        return variant == AppIconVariant.graphite ? @image-url("../resources/app-icon/variants/graphite-window.png")
            : variant == AppIconVariant.light ? @image-url("../resources/app-icon/variants/light-window.png")
            : variant == AppIconVariant.blue ? @image-url("../resources/app-icon/variants/blue-window.png")
            : variant == AppIconVariant.green ? @image-url("../resources/app-icon/variants/green-window.png")
            : variant == AppIconVariant.purple ? @image-url("../resources/app-icon/variants/purple-window.png")
            : @image-url("../resources/app-icon/flectar-mail-window.png");
    }

    // Trays draw at 16-44 px. The tray backends keep several decoded copies
    // and Linux sends the pixels over D-Bus, so the full app icon would cost
    // megabytes for the whole time the app sits in the tray.
    public pure function tray-image(variant: AppIconVariant) -> image {
        return variant == AppIconVariant.graphite ? @image-url("../resources/app-icon/variants/graphite-tray.png")
            : variant == AppIconVariant.light ? @image-url("../resources/app-icon/variants/light-tray.png")
            : variant == AppIconVariant.blue ? @image-url("../resources/app-icon/variants/blue-tray.png")
            : variant == AppIconVariant.green ? @image-url("../resources/app-icon/variants/green-tray.png")
            : variant == AppIconVariant.purple ? @image-url("../resources/app-icon/variants/purple-tray.png")
            : @image-url("../resources/app-icon/flectar-mail-tray.png");
    }
}