use crate::{
    Component, Container, CornerRadii, CosmicPalette, CosmicPaletteInner, DARK_PALETTE,
    LIGHT_PALETTE, NAME, Spacing, ThemeMode,
    color::{ColorRepr, ColorReprOption, color_serde, color_serde::option as color_serde_option},
    composite::over,
    steps::{color_index, get_small_widget_color, get_surface_color, get_text, steps},
};
use cosmic_config::{Config, CosmicConfigEntry, cosmic_config_derive::CosmicConfigEntry};
use palette::{
    IntoColor, Oklcha, Srgb, Srgba, WithAlpha, color_difference::Wcag21RelativeContrast, rgb::Rgb,
};
use serde::{Deserialize, Serialize};
use std::{default, num::NonZeroUsize};

/// ID for the current dark `ThemeBuilder` config
pub const DARK_THEME_BUILDER_ID: &str = "com.system76.CosmicTheme.Dark.Builder";

/// ID for the current dark Theme config
pub const DARK_THEME_ID: &str = "com.system76.CosmicTheme.Dark";

/// ID for the current light `ThemeBuilder`` config
pub const LIGHT_THEME_BUILDER_ID: &str = "com.system76.CosmicTheme.Light.Builder";

/// ID for the current light Theme config
pub const LIGHT_THEME_ID: &str = "com.system76.CosmicTheme.Light";

#[derive(Clone, Copy, Debug, Default, Deserialize, Serialize, PartialEq, Eq)]
/// Theme layer type
pub enum Layer {
    /// Background layer
    #[default]
    Background,
    /// Primary Layer
    Primary,
    /// Secondary Layer
    Secondary,
}

#[must_use]
/// Cosmic Theme data structure with all colors and its name
#[derive(Clone, Debug, Serialize, Deserialize, PartialEq, CosmicConfigEntry)]
#[version = 2]
pub struct Theme {
    /// name of the theme
    pub name: String,
    /// background element colors
    pub(crate) background: Container,
    /// primary element colors
    pub(crate) primary: Container,
    /// secondary element colors
    pub(crate) secondary: Container,
    /// background element colors
    pub(crate) transparent_background: Container,
    /// primary element colors
    pub(crate) transparent_primary: Container,
    /// secondary element colors
    pub(crate) transparent_secondary: Container,
    /// button component styling
    pub button: Component,
    /// accent element colors
    pub accent: Component,
    /// suggested element colors
    pub success: Component,
    /// destructive element colors
    pub destructive: Component,
    /// warning element colors
    pub warning: Component,
    /// accent button element colors
    pub accent_button: Component,
    /// suggested button element colors
    pub success_button: Component,
    /// destructive button element colors
    pub destructive_button: Component,
    /// warning button element colors
    pub warning_button: Component,
    /// icon button element colors
    pub icon_button: Component,
    /// link button element colors
    pub link_button: Component,
    /// text button element colors
    pub text_button: Component,
    /// palette
    pub palette: CosmicPaletteInner,
    /// spacing
    pub spacing: Spacing,
    /// corner radii
    pub corner_radii: CornerRadii,
    /// is dark
    pub is_dark: bool,
    /// is high contrast
    pub is_high_contrast: bool,
    /// cosmic-comp window gaps size (outer, inner)
    pub gaps: (u32, u32),
    /// cosmic-comp active hint window outline width
    pub active_hint: u32,
    /// cosmic-comp custom window hint color
    pub window_hint: Option<Srgb>,
    /// enables blurred transparency
    pub frosted: BlurStrength,
    /// frosted windows
    pub frosted_windows: bool,
    /// frosted system interface
    pub frosted_system_interface: bool,
    /// frosted panel
    pub frosted_panel: bool,
    /// frosted applet popups
    pub frosted_applets: bool,
    /// shade color for dialogs
    #[serde(with = "color_serde")]
    #[cosmic_config_entry(with = ColorRepr)]
    pub shade: Srgba,
    /// accent text colors
    /// If None, accent base color is the accent text color.
    #[serde(with = "color_serde_option")]
    #[cosmic_config_entry(with = ColorReprOption)]
    pub accent_text: Option<Srgba>,
    /// control tint color
    #[serde(with = "color_serde_option")]
    #[cosmic_config_entry(with = ColorReprOption)]
    pub control_tint: Option<Srgb>,
    /// text tint color
    #[serde(with = "color_serde_option")]
    #[cosmic_config_entry(with = ColorReprOption)]
    pub text_tint: Option<Srgb>,
}

impl Default for Theme {
    #[inline]
    fn default() -> Self {
        Self::preferred_theme()
    }
}

/// Trait for layered themes
pub trait LayeredTheme {
    /// Set the layer of the theme
    fn set_layer(&mut self, layer: Layer);
}

impl Theme {
    #[must_use]
    /// id of the theme
    pub fn id() -> &'static str {
        NAME
    }

    #[inline]
    /// Get the config for the current dark theme
    pub fn dark_config() -> Result<Config, cosmic_config::Error> {
        Config::new(DARK_THEME_ID, Self::VERSION)
    }

    #[inline]
    /// Get the config for the current light theme
    pub fn light_config() -> Result<Config, cosmic_config::Error> {
        Config::new(LIGHT_THEME_ID, Self::VERSION)
    }

    #[inline]
    /// get the built in light theme
    pub fn light_default() -> Self {
        LIGHT_PALETTE.clone().into()
    }

    #[inline]
    /// get the built in dark theme
    pub fn dark_default() -> Self {
        DARK_PALETTE.clone().into()
    }

    #[inline]
    /// get the built in high contrast dark theme
    pub fn high_contrast_dark_default() -> Self {
        CosmicPalette::HighContrastDark(DARK_PALETTE.as_ref().clone()).into()
    }

    #[inline]
    /// get the built in high contrast light theme
    pub fn high_contrast_light_default() -> Self {
        CosmicPalette::HighContrastLight(LIGHT_PALETTE.as_ref().clone()).into()
    }

    #[inline]
    /// Convert the theme to a high-contrast variant
    pub fn to_high_contrast(&self) -> Self {
        todo!();
    }

    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get opaque or transparent background based on whether blur is active
    pub fn background(&self, transparent: bool) -> &Container {
        if transparent {
            &self.transparent_background
        } else {
            &self.background
        }
    }

    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get opaque or transparent primary based on whether blur is active
    pub fn primary(&self, transparent: bool) -> &Container {
        if transparent {
            &self.transparent_primary
        } else {
            &self.primary
        }
    }

    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get opaque or transparent secondary based on whether blur is active
    pub fn secondary(&self, transparent: bool) -> &Container {
        if transparent {
            &self.transparent_secondary
        } else {
            &self.secondary
        }
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get control_0 color
    pub fn control_0(&self) -> Srgba {
        self.tint_neutral(self.palette.neutral_0)
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get control_1 color
    pub fn control_1(&self) -> Srgba {
        self.tint_neutral(self.palette.neutral_1)
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get control_2 color
    pub fn control_2(&self) -> Srgba {
        self.tint_neutral(self.palette.neutral_2)
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get control_3 color
    pub fn control_3(&self) -> Srgba {
        self.tint_neutral(self.palette.neutral_3)
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get control_3 color
    pub fn control_4(&self) -> Srgba {
        self.tint_neutral(self.palette.neutral_4)
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get control_3 color
    pub fn control_5(&self) -> Srgba {
        self.tint_neutral(self.palette.neutral_5)
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get control_3 color
    pub fn control_6(&self) -> Srgba {
        self.tint_neutral(self.palette.neutral_6)
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get control_3 color
    pub fn control_7(&self) -> Srgba {
        self.tint_neutral(self.palette.neutral_7)
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get control_3 color
    pub fn control_8(&self) -> Srgba {
        self.tint_neutral(self.palette.neutral_8)
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get control_3 color
    pub fn control_9(&self) -> Srgba {
        self.tint_neutral(self.palette.neutral_9)
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get control_3 color
    pub fn control_10(&self) -> Srgba {
        self.tint_neutral(self.palette.neutral_10)
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @accent_color
    fn tint_neutral(&self, neutral: Srgba) -> Srgba {
        let Some(tint) = self.control_tint else {
            return neutral;
        };
        let mut oklch_neutral: Oklcha = neutral.into_color();
        let oklch_tint: Oklcha = tint.into_color();
        oklch_neutral.hue = oklch_tint.hue;
        oklch_neutral.chroma = oklch_tint.chroma;
        oklch_neutral.into_color()
    }

    // TODO convenient getter functions for each named color variable
    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @accent_color
    pub fn accent_color(&self) -> Srgba {
        self.accent.base
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @success_color
    pub fn success_color(&self) -> Srgba {
        self.success.base
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @destructive_color
    pub fn destructive_color(&self) -> Srgba {
        self.destructive.base
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @warning_color
    pub fn warning_color(&self) -> Srgba {
        self.warning.base
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @small_widget_divider
    pub fn small_widget_divider(&self) -> Srgba {
        self.palette.neutral_9.with_alpha(0.2)
    }

    // Containers
    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @bg_color
    pub fn bg_color(&self) -> Srgba {
        self.background.base
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @bg_component_color
    pub fn bg_component_color(&self) -> Srgba {
        self.background.component.base
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @primary_container_color
    pub fn primary_container_color(&self) -> Srgba {
        self.primary.base
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @primary_component_color
    pub fn primary_component_color(&self) -> Srgba {
        self.primary.component.base
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @secondary_container_color
    pub fn secondary_container_color(&self) -> Srgba {
        self.secondary.base
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @secondary_component_color
    pub fn secondary_component_color(&self) -> Srgba {
        self.secondary.component.base
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @button_bg_color
    pub fn button_bg_color(&self) -> Srgba {
        self.button.base
    }

    // Text
    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @on_bg_color
    pub fn on_bg_color(&self) -> Srgba {
        self.background.on
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @on_bg_component_color
    pub fn on_bg_component_color(&self) -> Srgba {
        self.background.component.on
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @on_primary_color
    pub fn on_primary_container_color(&self) -> Srgba {
        self.primary.on
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @on_primary_component_color
    pub fn on_primary_component_color(&self) -> Srgba {
        self.primary.component.on
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @on_secondary_color
    pub fn on_secondary_container_color(&self) -> Srgba {
        self.secondary.on
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @on_secondary_component_color
    pub fn on_secondary_component_color(&self) -> Srgba {
        self.secondary.component.on
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @accent_text_color
    pub fn accent_text_color(&self) -> Srgba {
        self.accent_text.unwrap_or(self.accent.base)
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @success_text_color
    pub fn success_text_color(&self) -> Srgba {
        self.success.base
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @warning_text_color
    pub fn warning_text_color(&self) -> Srgba {
        self.warning.base
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @destructive_text_color
    pub fn destructive_text_color(&self) -> Srgba {
        self.destructive.base
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @on_accent_color
    pub fn on_accent_color(&self) -> Srgba {
        self.accent.on
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @on_success_color
    pub fn on_success_color(&self) -> Srgba {
        self.success.on
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @on_warning_color
    pub fn on_warning_color(&self) -> Srgba {
        self.warning.on
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @on_destructive_color
    pub fn on_destructive_color(&self) -> Srgba {
        self.destructive.on
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @button_color
    pub fn button_color(&self) -> Srgba {
        self.button.on
    }

    // Borders and Dividers
    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @bg_divider
    pub fn bg_divider(&self) -> Srgba {
        self.background.divider
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @bg_component_divider
    pub fn bg_component_divider(&self) -> Srgba {
        self.background.component.divider
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @primary_container_divider
    pub fn primary_container_divider(&self) -> Srgba {
        self.primary.divider
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @primary_component_divider
    pub fn primary_component_divider(&self) -> Srgba {
        self.primary.component.divider
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @secondary_container_divider
    pub fn secondary_container_divider(&self) -> Srgba {
        self.secondary.divider
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @button_divider
    pub fn button_divider(&self) -> Srgba {
        self.button.divider
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @window_header_bg
    pub fn window_header_bg(&self) -> Srgba {
        self.background.base
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @space_none
    pub fn space_none(&self) -> u16 {
        self.spacing.space_none
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @space_xxxs
    pub fn space_xxxs(&self) -> u16 {
        self.spacing.space_xxxs
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @space_xxs
    pub fn space_xxs(&self) -> u16 {
        self.spacing.space_xxs
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @space_xs
    pub fn space_xs(&self) -> u16 {
        self.spacing.space_xs
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @space_s
    pub fn space_s(&self) -> u16 {
        self.spacing.space_s
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @space_m
    pub fn space_m(&self) -> u16 {
        self.spacing.space_m
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @space_l
    pub fn space_l(&self) -> u16 {
        self.spacing.space_l
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @space_xl
    pub fn space_xl(&self) -> u16 {
        self.spacing.space_xl
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @space_xxl
    pub fn space_xxl(&self) -> u16 {
        self.spacing.space_xxl
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @space_xxxl
    pub fn space_xxxl(&self) -> u16 {
        self.spacing.space_xxxl
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @radius_0
    pub fn radius_0(&self) -> [f32; 4] {
        self.corner_radii.radius_0
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @radius_xs
    pub fn radius_xs(&self) -> [f32; 4] {
        self.corner_radii.radius_xs
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @radius_s
    pub fn radius_s(&self) -> [f32; 4] {
        self.corner_radii.radius_s
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @radius_m
    pub fn radius_m(&self) -> [f32; 4] {
        self.corner_radii.radius_m
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @radius_l
    pub fn radius_l(&self) -> [f32; 4] {
        self.corner_radii.radius_l
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @radius_xl
    pub fn radius_xl(&self) -> [f32; 4] {
        self.corner_radii.radius_xl
    }

    #[must_use]
    #[allow(clippy::doc_markdown)]
    #[inline]
    /// get @shade_color
    pub fn shade_color(&self) -> Srgba {
        self.shade
    }

    /// Get the active theme based on the current theme mode.
    pub fn get_active() -> Result<Self, (Vec<cosmic_config::Error>, Self)> {
        (|| {
            (if ThemeMode::is_dark(&Config::new(Self::id(), Self::VERSION)?)? {
                Self::dark_config
            } else {
                Self::light_config
            })()
        })()
        .map_err(|error| (vec![error], Self::default()))
        .and_then(|theme_config| Self::get_entry(&theme_config))
    }

    #[must_use]
    /// Rebuild the current theme with the provided accent
    pub fn with_accent(&self, c: Srgba) -> Self {
        let mut oklcha: Oklcha = c.into_color();
        let cur_oklcha: Oklcha = self.accent_color().into_color();
        oklcha.l = cur_oklcha.l;
        let adjusted_c: Srgb = oklcha.into_color();

        let is_dark = self.is_dark;

        let mut builder = if is_dark {
            ThemeBuilder::dark_config()
                .ok()
                .and_then(|h| ThemeBuilder::get_entry(&h).ok())
                .unwrap_or_else(ThemeBuilder::dark)
        } else {
            ThemeBuilder::light_config()
                .ok()
                .and_then(|h| ThemeBuilder::get_entry(&h).ok())
                .unwrap_or_else(ThemeBuilder::light)
        };
        builder = builder.accent(adjusted_c);
        builder.build()
    }

    /// choose default color palette based on preferred GTK color scheme
    pub fn gtk_prefer_colorscheme() -> Self {
        let gsettings = "/usr/bin/gsettings";

        let cmd = std::process::Command::new(gsettings)
            .arg("get")
            .arg("org.gnome.desktop.interface")
            .arg("color-scheme")
            .output();

        if let Ok(cmd) = cmd {
            let color_scheme = String::from_utf8_lossy(&cmd.stdout);

            if color_scheme.trim().contains("default") || color_scheme.trim().contains("light") {
                return Self::light_default();
            }
        }

        Self::dark_default()
    }

    /// check current desktop environment and preferred color scheme and set it as default
    pub fn preferred_theme() -> Self {
        let current_desktop = std::env::var("XDG_CURRENT_DESKTOP");

        if let Ok(desktop) = current_desktop
            && desktop.trim().to_lowercase().contains("gnome")
        {
            return Self::gtk_prefer_colorscheme();
        }

        Self::dark_default()
    }
}

impl From<CosmicPalette> for Theme {
    fn from(p: CosmicPalette) -> Self {
        ThemeBuilder::palette(p).build()
    }
}

#[must_use]
/// Helper for building customized themes
#[derive(Clone, Debug, Serialize, Deserialize, CosmicConfigEntry, PartialEq)]
#[version = 2]
pub struct ThemeBuilder {
    /// override the palette for the builder
    pub palette: CosmicPalette,
    /// override spacing for the builder
    pub spacing: Spacing,
    /// override corner radii for the builder
    pub corner_radii: CornerRadii,
    /// override neutral_tint for the builder
    #[serde(with = "color_serde_option")]
    #[cosmic_config_entry(with = ColorReprOption)]
    pub neutral_tint: Option<Srgb>,
    /// override bg_color for the builder
    #[serde(with = "color_serde_option")]
    #[cosmic_config_entry(with = ColorReprOption)]
    pub bg_color: Option<Srgba>,
    /// override the primary container bg color for the builder
    #[serde(with = "color_serde_option")]
    #[cosmic_config_entry(with = ColorReprOption)]
    pub primary_container_bg: Option<Srgba>,
    /// override the secontary container bg color for the builder
    #[serde(with = "color_serde_option")]
    #[cosmic_config_entry(with = ColorReprOption)]
    pub secondary_container_bg: Option<Srgba>,
    /// override the text tint for the builder
    #[serde(with = "color_serde_option")]
    #[cosmic_config_entry(with = ColorReprOption)]
    pub text_tint: Option<Srgb>,
    /// override the accent color for the builder
    #[serde(with = "color_serde_option")]
    #[cosmic_config_entry(with = ColorReprOption)]
    pub accent: Option<Srgb>,
    /// override the success color for the builder
    #[serde(with = "color_serde_option")]
    #[cosmic_config_entry(with = ColorReprOption)]
    pub success: Option<Srgb>,
    /// override the warning color for the builder
    #[serde(with = "color_serde_option")]
    #[cosmic_config_entry(with = ColorReprOption)]
    pub warning: Option<Srgb>,
    /// override the destructive color for the builder
    #[serde(with = "color_serde_option")]
    #[cosmic_config_entry(with = ColorReprOption)]
    pub destructive: Option<Srgb>,
    /// enabled blurred transparency
    pub frosted: BlurStrength,
    /// cosmic-comp window gaps size (outer, inner)
    pub gaps: (u32, u32),
    /// cosmic-comp active hint window outline width
    pub active_hint: u32,
    /// cosmic-comp custom window hint color
    #[serde(with = "color_serde_option")]
    #[cosmic_config_entry(with = ColorReprOption)]
    pub window_hint: Option<Srgb>,
    /// frosted windows
    pub frosted_windows: bool,
    /// frosted system interface
    pub frosted_system_interface: bool,
    /// frosted panel
    pub frosted_panel: bool,
    /// frosted applet popups
    pub frosted_applets: bool,
}

impl Default for ThemeBuilder {
    fn default() -> Self {
        Self {
            palette: DARK_PALETTE.to_owned(),
            spacing: Spacing::default(),
            corner_radii: CornerRadii::default(),
            neutral_tint: Default::default(),
            text_tint: Default::default(),
            bg_color: Default::default(),
            primary_container_bg: Default::default(),
            secondary_container_bg: Default::default(),
            accent: Default::default(),
            success: Default::default(),
            warning: Default::default(),
            destructive: Default::default(),
            frosted: BlurStrength::default(),
            // cosmic-comp theme settings
            gaps: (0, 8),
            active_hint: 3,
            window_hint: None,
            frosted_windows: false,
            frosted_system_interface: false,
            frosted_panel: false,
            frosted_applets: false,
        }
    }
}

impl ThemeBuilder {
    #[inline]
    /// Get a builder that is initialized with the default dark theme
    pub fn dark() -> Self {
        Self {
            palette: DARK_PALETTE.to_owned(),
            ..Default::default()
        }
    }

    #[inline]
    /// Get a builder that is initialized with the default light theme
    pub fn light() -> Self {
        Self {
            palette: LIGHT_PALETTE.to_owned(),
            ..Default::default()
        }
    }

    #[inline]
    /// Get a builder that is initialized with the default dark high contrast theme
    pub fn dark_high_contrast() -> Self {
        let palette: CosmicPalette = DARK_PALETTE.to_owned();
        Self {
            palette: CosmicPalette::HighContrastDark(palette.inner()),
            ..Default::default()
        }
    }

    #[inline]
    /// Get a builder that is initialized with the default light high contrast theme
    pub fn light_high_contrast() -> Self {
        let palette: CosmicPalette = LIGHT_PALETTE.to_owned();
        Self {
            palette: CosmicPalette::HighContrastLight(palette.inner()),
            ..Default::default()
        }
    }

    #[inline]
    /// Get a builder that is initialized with the provided palette
    pub fn palette(palette: CosmicPalette) -> Self {
        Self {
            palette,
            ..Default::default()
        }
    }

    #[inline]
    /// set the spacing of the builder
    pub fn spacing(mut self, spacing: Spacing) -> Self {
        self.spacing = spacing;
        self
    }

    #[inline]
    /// set the corner radii of the builder
    pub fn corner_radii(mut self, corner_radii: CornerRadii) -> Self {
        self.corner_radii = corner_radii;
        self
    }

    #[inline]
    /// apply a neutral tint to the palette
    pub fn neutral_tint(mut self, tint: Srgb) -> Self {
        self.neutral_tint = Some(tint);
        self
    }

    #[inline]
    /// apply a text tint to the palette
    pub fn text_tint(mut self, tint: Srgb) -> Self {
        self.text_tint = Some(tint);
        self
    }

    #[inline]
    /// apply a background color to the palette
    pub fn bg_color(mut self, c: Srgba) -> Self {
        self.bg_color = Some(c);
        self
    }

    #[inline]
    /// apply a primary container background color to the palette
    pub fn primary_container_bg(mut self, c: Srgba) -> Self {
        self.primary_container_bg = Some(c);
        self
    }

    #[inline]
    /// apply a accent color to the palette
    pub fn accent(mut self, c: Srgb) -> Self {
        self.accent = Some(c);
        self
    }

    #[inline]
    /// apply a success color to the palette
    pub fn success(mut self, c: Srgb) -> Self {
        self.success = Some(c);
        self
    }

    #[inline]
    /// apply a warning color to the palette
    pub fn warning(mut self, c: Srgb) -> Self {
        self.warning = Some(c);
        self
    }

    #[inline]
    /// apply a destructive color to the palette
    pub fn destructive(mut self, c: Srgb) -> Self {
        self.destructive = Some(c);
        self
    }

    #[allow(clippy::too_many_lines)]
    /// build the theme
    pub fn build(self) -> Theme {
        let Self {
            palette,
            spacing,
            corner_radii,
            neutral_tint,
            text_tint,
            bg_color,
            primary_container_bg,
            secondary_container_bg,
            accent,
            success,
            warning,
            destructive,
            gaps,
            active_hint,
            window_hint,
            frosted,
            frosted_windows,
            frosted_system_interface,
            frosted_panel,
            frosted_applets,
        } = self;

        let container_alpha = frosted.alpha();

        let is_dark = palette.is_dark();
        let is_high_contrast = palette.is_high_contrast();

        let accent = if let Some(accent) = accent {
            accent.into_color()
        } else {
            palette.as_ref().accent_blue
        };

        let success = if let Some(success) = success {
            success.into_color()
        } else {
            palette.as_ref().bright_green
        };

        let warning = if let Some(warning) = warning {
            warning.into_color()
        } else {
            palette.as_ref().bright_orange
        };

        let destructive = if let Some(destructive) = destructive {
            destructive.into_color()
        } else {
            palette.as_ref().bright_red
        };

        let text_steps_array = text_tint.map(|c| steps(c, NonZeroUsize::new(100).unwrap()));

        let mut control_steps_array = if let Some(neutral_tint) = neutral_tint {
            steps(neutral_tint, NonZeroUsize::new(11).unwrap())
        } else {
            steps(palette.as_ref().neutral_2, NonZeroUsize::new(11).unwrap())
        };
        if !is_dark {
            control_steps_array.reverse();
        }

        let p_ref = palette.as_ref();

        let neutral_steps = steps(
            neutral_tint.unwrap_or(Rgb::new(0.0, 0.0, 0.0)),
            NonZeroUsize::new(100).unwrap(),
        );

        let bg = if let Some(bg_color) = bg_color {
            bg_color
        } else {
            p_ref.gray_1
        };

        let step_array = steps(bg, NonZeroUsize::new(100).unwrap());
        let bg_index = color_index(bg, step_array.len());

        let mut transparent_bg = bg;
        transparent_bg.alpha = container_alpha;
        let transparent_bg_steps_array = steps(transparent_bg, NonZeroUsize::new(100).unwrap());

        let mut component_hovered_overlay = if bg_index < 91 {
            control_steps_array[10]
        } else {
            control_steps_array[0]
        };
        component_hovered_overlay.alpha = 0.1;

        let mut component_pressed_overlay = component_hovered_overlay;
        component_pressed_overlay.alpha = 0.2;

        // Standard button background is neutral 7 with 25% opacity
        let button_bg = control_steps_array[7].with_alpha(0.25);

        let (button_hovered_overlay, button_pressed_overlay) = (
            control_steps_array[5].with_alpha(0.2),
            control_steps_array[2].with_alpha(0.5),
        );

        let bg_component = get_surface_color(bg_index, 8, &step_array, is_dark, &p_ref.neutral_2);
        let on_bg_component = get_text(
            color_index(bg_component, step_array.len()),
            &step_array,
            &control_steps_array[8],
            text_steps_array.as_deref(),
        );

        let transparent_bg_component = get_surface_color(
            bg_index,
            8,
            &transparent_bg_steps_array,
            is_dark,
            &p_ref.neutral_2,
        );
        let on_transparent_bg_component = get_text(
            color_index(transparent_bg_component, transparent_bg_steps_array.len()),
            &transparent_bg_steps_array,
            &control_steps_array[8],
            text_steps_array.as_deref(),
        );

        let primary = {
            let mut container_bg = if let Some(primary_container_bg_color) = primary_container_bg {
                primary_container_bg_color
            } else {
                get_surface_color(bg_index, 5, &step_array, is_dark, &control_steps_array[1])
            };

            let step_array = steps(container_bg, NonZeroUsize::new(100).unwrap());
            let base_index: usize = color_index(container_bg, step_array.len());
            let component_base =
                get_surface_color(base_index, 6, &step_array, is_dark, &control_steps_array[3]);

            component_hovered_overlay = if base_index < 91 {
                control_steps_array[10]
            } else {
                control_steps_array[0]
            };
            component_hovered_overlay.alpha = 0.1;

            component_pressed_overlay = component_hovered_overlay;
            component_pressed_overlay.alpha = 0.2;

            Container::new(
                Component::component(
                    component_base,
                    accent,
                    get_text(
                        color_index(component_base, step_array.len()),
                        &step_array,
                        &control_steps_array[8],
                        text_steps_array.as_deref(),
                    ),
                    component_hovered_overlay,
                    component_pressed_overlay,
                    is_high_contrast,
                    control_steps_array[8],
                ),
                container_bg,
                get_text(
                    base_index,
                    &step_array,
                    &control_steps_array[8],
                    text_steps_array.as_deref(),
                ),
                get_small_widget_color(base_index, 5, &neutral_steps, &control_steps_array[6]),
                is_high_contrast,
            )
        };
        let transparent_primary = {
            let mut container_bg = if let Some(primary_container_bg_color) = primary_container_bg {
                primary_container_bg_color
            } else {
                get_surface_color(bg_index, 5, &step_array, is_dark, &control_steps_array[1])
            };
            container_bg.alpha = (container_alpha + if is_dark { 0.3 } else { 0.25 }).min(1.0);

            let step_array = steps(container_bg, NonZeroUsize::new(100).unwrap());
            let base_index: usize = color_index(container_bg, step_array.len());
            let component_base =
                get_surface_color(base_index, 6, &step_array, is_dark, &control_steps_array[3]);

            Container::new(
                Component::component(
                    component_base,
                    accent,
                    get_text(
                        color_index(component_base, step_array.len()),
                        &step_array,
                        &control_steps_array[8],
                        text_steps_array.as_deref(),
                    ),
                    Srgba::new(0., 0., 0., 0.0),
                    Srgba::new(0., 0., 0., 0.0),
                    is_high_contrast,
                    control_steps_array[8],
                ),
                container_bg,
                get_text(
                    base_index,
                    &step_array,
                    &control_steps_array[8],
                    text_steps_array.as_deref(),
                ),
                get_small_widget_color(base_index, 5, &neutral_steps, &control_steps_array[6]),
                is_high_contrast,
            )
        };

        let accent_text = if is_dark {
            (primary.base.relative_contrast(accent.color) < 4.).then(|| {
                let step_array = steps(accent, NonZeroUsize::new(100).unwrap());
                let primary_color_index = color_index(primary.base, 100);
                let steps = if is_high_contrast { 60 } else { 50 };
                let accent_text = get_surface_color(
                    primary_color_index,
                    steps,
                    &step_array,
                    is_dark,
                    &Srgba::new(1., 1., 1., 1.),
                );
                if primary.base.relative_contrast(accent_text.color) < 4. {
                    Srgba::new(1., 1., 1., 1.)
                } else {
                    accent_text
                }
            })
        } else {
            let darkest = if bg.relative_luminance().luma < primary.base.relative_luminance().luma {
                bg
            } else {
                primary.base
            };

            (darkest.relative_contrast(accent.color) < 4.).then(|| {
                let step_array = steps(accent, NonZeroUsize::new(100).unwrap());
                let primary_color_index = color_index(darkest, 100);
                let steps = if is_high_contrast { 60 } else { 50 };
                let accent_text = get_surface_color(
                    primary_color_index,
                    steps,
                    &step_array,
                    is_dark,
                    &Srgba::new(1., 1., 1., 1.),
                );
                if darkest.relative_contrast(accent_text.color) < 4. {
                    Srgba::new(0., 0., 0., 1.)
                } else {
                    accent_text
                }
            })
        };

        let mut theme: Theme = Theme {
            name: palette.name().to_string(),
            shade: if palette.is_dark() {
                Srgba::new(0., 0., 0., 0.32)
            } else {
                Srgba::new(0., 0., 0., 0.08)
            },
            background: Container::new(
                Component::component(
                    bg_component,
                    accent,
                    on_bg_component,
                    component_hovered_overlay,
                    component_pressed_overlay,
                    is_high_contrast,
                    control_steps_array[8],
                ),
                bg,
                get_text(
                    bg_index,
                    &step_array,
                    &control_steps_array[8],
                    text_steps_array.as_deref(),
                ),
                get_small_widget_color(bg_index, 5, &neutral_steps, &control_steps_array[6]),
                is_high_contrast,
            ),
            primary,
            secondary: {
                let container_bg = if let Some(secondary_container_bg) = secondary_container_bg {
                    secondary_container_bg
                } else {
                    get_surface_color(bg_index, 10, &step_array, is_dark, &control_steps_array[2])
                };

                let step_array = steps(container_bg, NonZeroUsize::new(100).unwrap());
                let base_index = color_index(container_bg, step_array.len());
                let secondary_component =
                    get_surface_color(base_index, 3, &step_array, is_dark, &control_steps_array[4]);

                component_hovered_overlay = if base_index < 91 {
                    control_steps_array[10]
                } else {
                    control_steps_array[0]
                };
                component_hovered_overlay.alpha = 0.1;

                component_pressed_overlay = component_hovered_overlay;
                component_pressed_overlay.alpha = 0.2;

                Container::new(
                    Component::component(
                        secondary_component,
                        accent,
                        get_text(
                            color_index(secondary_component, step_array.len()),
                            &step_array,
                            &control_steps_array[8],
                            text_steps_array.as_deref(),
                        ),
                        component_hovered_overlay,
                        component_pressed_overlay,
                        is_high_contrast,
                        control_steps_array[8],
                    ),
                    container_bg,
                    get_text(
                        base_index,
                        &step_array,
                        &control_steps_array[8],
                        text_steps_array.as_deref(),
                    ),
                    get_small_widget_color(base_index, 5, &neutral_steps, &control_steps_array[6]),
                    is_high_contrast,
                )
            },
            accent: Component::colored_component(
                accent,
                control_steps_array[0],
                accent,
                button_hovered_overlay,
                button_pressed_overlay,
            ),
            accent_button: Component::colored_button(
                accent,
                control_steps_array[1],
                control_steps_array[0],
                accent,
                button_hovered_overlay,
                button_pressed_overlay,
            ),
            button: Component::component(
                button_bg,
                accent,
                on_bg_component,
                button_hovered_overlay,
                button_pressed_overlay,
                is_high_contrast,
                control_steps_array[8],
            ),
            destructive: Component::colored_component(
                destructive,
                control_steps_array[0],
                accent,
                button_hovered_overlay,
                button_pressed_overlay,
            ),
            destructive_button: Component::colored_button(
                destructive,
                control_steps_array[1],
                control_steps_array[0],
                accent,
                button_hovered_overlay,
                button_pressed_overlay,
            ),
            icon_button: Component::component(
                Srgba::new(0.0, 0.0, 0.0, 0.0),
                accent,
                control_steps_array[8],
                button_hovered_overlay,
                button_pressed_overlay,
                is_high_contrast,
                control_steps_array[8],
            ),
            link_button: {
                let mut component = Component::component(
                    Srgba::new(0.0, 0.0, 0.0, 0.0),
                    accent,
                    accent_text.unwrap_or(accent),
                    Srgba::new(0.0, 0.0, 0.0, 0.0),
                    Srgba::new(0.0, 0.0, 0.0, 0.0),
                    is_high_contrast,
                    control_steps_array[8],
                );

                component.on_disabled = over(component.on.with_alpha(0.5), component.base);
                component
            },
            success: Component::colored_component(
                success,
                control_steps_array[0],
                accent,
                button_hovered_overlay,
                button_pressed_overlay,
            ),
            success_button: Component::colored_button(
                success,
                control_steps_array[1],
                control_steps_array[0],
                accent,
                button_hovered_overlay,
                button_pressed_overlay,
            ),
            text_button: Component::component(
                Srgba::new(0.0, 0.0, 0.0, 0.0),
                accent,
                accent_text.unwrap_or(accent),
                button_hovered_overlay,
                button_pressed_overlay,
                is_high_contrast,
                control_steps_array[8],
            ),
            warning: Component::colored_component(
                warning,
                control_steps_array[0],
                accent,
                button_hovered_overlay,
                button_pressed_overlay,
            ),
            warning_button: Component::colored_button(
                warning,
                control_steps_array[10],
                control_steps_array[0],
                accent,
                button_hovered_overlay,
                button_pressed_overlay,
            ),
            palette: palette.inner(),
            spacing,
            corner_radii,
            is_dark,
            is_high_contrast,
            gaps,
            active_hint,
            window_hint,
            frosted,
            accent_text,
            control_tint: neutral_tint,
            text_tint,
            frosted_windows,
            frosted_system_interface,
            frosted_panel,
            frosted_applets,
            transparent_background: Container::new(
                Component::component(
                    transparent_bg_component,
                    accent,
                    on_transparent_bg_component,
                    Srgba::new(0., 0., 0., 0.0),
                    Srgba::new(0., 0., 0., 0.0),
                    is_high_contrast,
                    control_steps_array[8],
                ),
                transparent_bg,
                get_text(
                    bg_index,
                    &transparent_bg_steps_array,
                    &control_steps_array[8],
                    text_steps_array.as_deref(),
                ),
                get_small_widget_color(bg_index, 5, &neutral_steps, &control_steps_array[6]),
                is_high_contrast,
            ),
            transparent_primary,
            transparent_secondary: {
                let mut container_bg = if let Some(secondary_container_bg) = secondary_container_bg
                {
                    secondary_container_bg
                } else {
                    get_surface_color(bg_index, 10, &step_array, is_dark, &control_steps_array[2])
                };
                container_bg.alpha = (container_alpha + if is_dark { 0.6 } else { 0.5 }).min(1.0);

                let step_array = steps(container_bg, NonZeroUsize::new(100).unwrap());
                let base_index = color_index(container_bg, step_array.len());
                let secondary_component =
                    get_surface_color(base_index, 3, &step_array, is_dark, &control_steps_array[4]);

                Container::new(
                    Component::component(
                        secondary_component,
                        accent,
                        get_text(
                            color_index(secondary_component, step_array.len()),
                            &step_array,
                            &control_steps_array[8],
                            text_steps_array.as_deref(),
                        ),
                        Srgba::new(0., 0., 0., 0.0),
                        Srgba::new(0., 0., 0., 0.0),
                        is_high_contrast,
                        control_steps_array[8],
                    ),
                    container_bg,
                    get_text(
                        base_index,
                        &step_array,
                        &control_steps_array[8],
                        text_steps_array.as_deref(),
                    ),
                    get_small_widget_color(base_index, 5, &neutral_steps, &control_steps_array[6]),
                    is_high_contrast,
                )
            },
        };
        theme.spacing = spacing;
        theme.corner_radii = corner_radii;
        theme
    }

    #[inline]
    /// Get the builder for the dark config
    pub fn dark_config() -> Result<Config, cosmic_config::Error> {
        Config::new(DARK_THEME_BUILDER_ID, Self::VERSION)
    }

    #[inline]
    /// Get the builder for the light config
    pub fn light_config() -> Result<Config, cosmic_config::Error> {
        Config::new(LIGHT_THEME_BUILDER_ID, Self::VERSION)
    }
}

/// Actual blur radius is decided by cosmic-comp,
/// but this represents the strength of the blur effect.
#[allow(missing_docs)]
#[repr(u8)]
#[derive(Default, Copy, Clone, Debug, Serialize, Deserialize, PartialEq)]
pub enum BlurStrength {
    ExtremelyLow,
    ExtremelyLow2,
    VeryLow,
    VeryLow2,
    Low,
    Low2,
    #[default]
    Medium,
    Medium2,
    High,
    High2,
    VeryHigh,
    VeryHigh2,
    ExtremelyHigh,
    ExtremelyHigh2,
}

impl BlurStrength {
    /// Get the alpha value corresponding to the blur strength
    /// Lower alpha values correspond to stronger blur effects, and higher alpha values correspond to weaker blur effects. The mapping is as follows:
    pub fn alpha(&self) -> f32 {
        match self {
            Self::ExtremelyLow => 0.90,
            Self::ExtremelyLow2 => 0.85,
            Self::VeryLow => 0.8,
            Self::VeryLow2 => 0.75,
            Self::Low => 0.7,
            Self::Low2 => 0.65,
            Self::Medium => 0.6,
            Self::Medium2 => 0.55,
            Self::High => 0.5,
            Self::High2 => 0.45,
            Self::VeryHigh => 0.4,
            Self::VeryHigh2 => 0.35,
            Self::ExtremelyHigh => 0.25,
            Self::ExtremelyHigh2 => 0.2,
        }
    }
}

impl TryFrom<u8> for BlurStrength {
    type Error = ();

    fn try_from(value: u8) -> Result<Self, Self::Error> {
        match value {
            0 => Ok(BlurStrength::ExtremelyLow),
            1 => Ok(BlurStrength::ExtremelyLow2),
            2 => Ok(BlurStrength::VeryLow),
            3 => Ok(BlurStrength::VeryLow2),
            4 => Ok(BlurStrength::Low),
            5 => Ok(BlurStrength::Low2),
            6 => Ok(BlurStrength::Medium),
            7 => Ok(BlurStrength::Medium2),
            8 => Ok(BlurStrength::High),
            9 => Ok(BlurStrength::High2),
            10 => Ok(BlurStrength::VeryHigh),
            11 => Ok(BlurStrength::VeryHigh2),
            12 => Ok(BlurStrength::ExtremelyHigh),
            13 => Ok(BlurStrength::ExtremelyHigh2),
            _ => Err(()),
        }
    }
}