use iced::{
    application, color,
    widget::{container, text, text_input},
    Background, Color,
};

use once_cell::sync::Lazy;

static GANDALF_COLOR_NONE: Lazy<Color> = Lazy::new(|| color!(0x000000, 0.));
static GANDALF_COLOR_BG: Lazy<Color> = Lazy::new(|| color!(0x292831, 0.8));
static GANDALF_COLOR_TEXT: Lazy<Color> = Lazy::new(|| color!(0x4a7a96, 1.));
static GANDALF_COLOR_PLACEHOLDER: Lazy<Color> = Lazy::new(|| color!(0x333f58, 1.));
static GANDALF_COLOR_PROMPT: Lazy<Color> = Lazy::new(|| color!(0xfbbbad, 1.));
static GANDALF_COLOR_SELECTED: Lazy<Color> = Lazy::new(|| color!(0xee8695, 1.));

#[derive(Debug, Default, Clone, Copy, PartialEq)]
pub enum GTheme {
    #[default]
    Light,
}

/// The style of an application.
#[derive(Default)]
pub enum Application {
    /// The default style.
    #[default]
    Default,
}

impl application::StyleSheet for GTheme {
    type Style = Application;

    fn appearance(&self, style: &Self::Style) -> application::Appearance {
        match style {
            Application::Default => application::Appearance {
                background_color: *GANDALF_COLOR_BG,
                text_color: *GANDALF_COLOR_TEXT,
            },
        }
    }
}

/// The style of a container.
#[derive(Default)]
pub enum Container {
    #[default]
    Transparent,
}

impl container::StyleSheet for GTheme {
    type Style = Container;

    fn appearance(&self, style: &Self::Style) -> container::Appearance {
        match style {
            Container::Transparent => Default::default(),
        }
    }
}

/// The style of text.
#[derive(Clone, Copy, Default)]
pub enum Text {
    #[default]
    Default,
    Selected,
}

impl text::StyleSheet for GTheme {
    type Style = Text;

    fn appearance(&self, style: Self::Style) -> text::Appearance {
        match style {
            Text::Default => text::Appearance {
                color: Some(*GANDALF_COLOR_TEXT),
            },
            Text::Selected => text::Appearance {
                color: Some(*GANDALF_COLOR_SELECTED),
            },
        }
    }
}

/// The style of a text input.
#[derive(Default)]
pub enum TextInput {
    #[default]
    Default,
}

impl text_input::StyleSheet for GTheme {
    type Style = TextInput;

    fn active(&self, _style: &Self::Style) -> text_input::Appearance {
        text_input::Appearance {
            background: Background::Color(*GANDALF_COLOR_NONE),
            border_radius: 0.,
            border_width: 0.,
            border_color: *GANDALF_COLOR_NONE,
        }
    }

    fn hovered(&self, _style: &Self::Style) -> text_input::Appearance {
        text_input::Appearance {
            background: Background::Color(*GANDALF_COLOR_NONE),
            border_radius: 0.,
            border_width: 0.,
            border_color: *GANDALF_COLOR_NONE,
        }
    }

    fn focused(&self, _style: &Self::Style) -> text_input::Appearance {
        text_input::Appearance {
            background: Background::Color(*GANDALF_COLOR_NONE),
            border_radius: 0.,
            border_width: 0.,
            border_color: *GANDALF_COLOR_NONE,
        }
    }

    fn placeholder_color(&self, _style: &Self::Style) -> Color {
        *GANDALF_COLOR_PLACEHOLDER
    }

    fn value_color(&self, _style: &Self::Style) -> Color {
        *GANDALF_COLOR_PROMPT
    }

    fn selection_color(&self, _style: &Self::Style) -> Color {
        *GANDALF_COLOR_NONE
    }
}