//! Semantic color roles. This module is the only place in the workspace
//! allowed to hold color literals.

use gpui::{Hsla, hsla, rgb};

fn hex(hex: u32) -> Hsla {
    rgb(hex).into()
}

/// The dim scrim behind modal layers; always a translucent black.
pub(crate) fn scrim(alpha: f32) -> Hsla {
    hsla(0., 0., 0., alpha)
}

/// The semantic color roles components paint from.
#[derive(Clone, Copy, Debug, PartialEq)]
pub struct ColorTokens {
    pub background: Hsla,
    pub foreground: Hsla,
    pub surface: Hsla,
    pub surface_foreground: Hsla,
    pub primary: Hsla,
    pub primary_foreground: Hsla,
    pub secondary: Hsla,
    pub secondary_foreground: Hsla,
    pub muted: Hsla,
    pub muted_foreground: Hsla,
    pub accent: Hsla,
    pub accent_foreground: Hsla,
    pub destructive: Hsla,
    pub destructive_foreground: Hsla,
    pub success: Hsla,
    pub success_foreground: Hsla,
    pub warning: Hsla,
    pub warning_foreground: Hsla,
    pub border: Hsla,
    pub input: Hsla,
    pub ring: Hsla,
    pub selection: Hsla,
    /// The scrim behind modal layers, translucent in every theme.
    pub overlay: Hsla,
    /// The overlay scrollbar thumb, translucent over scrolling content.
    pub scrollbar_thumb: Hsla,
}

impl ColorTokens {
    /// Neutral light palette; the fallback when no system theme applies.
    pub fn light() -> Self {
        Self {
            background: hex(0xffffff),
            foreground: hex(0x18181b),
            surface: hex(0xfafafa),
            surface_foreground: hex(0x18181b),
            primary: hex(0x2563eb),
            primary_foreground: hex(0xffffff),
            secondary: hex(0xf4f4f5),
            secondary_foreground: hex(0x18181b),
            muted: hex(0xf4f4f5),
            muted_foreground: hex(0x71717a),
            accent: hex(0x2563eb),
            accent_foreground: hex(0xffffff),
            destructive: hex(0xdc2626),
            destructive_foreground: hex(0xffffff),
            success: hex(0x16a34a),
            success_foreground: hex(0xffffff),
            warning: hex(0xd97706),
            warning_foreground: hex(0xffffff),
            border: hex(0xe4e4e7),
            input: hex(0xe4e4e7),
            ring: hex(0x93c5fd),
            selection: hex(0xdbeafe),
            overlay: scrim(0.25),
            // macOS light overlay thumbs are translucent black.
            scrollbar_thumb: hsla(0., 0., 0., 0.25),
        }
    }

    /// Neutral dark palette; the fallback when no system theme applies.
    pub fn dark() -> Self {
        Self {
            background: hex(0x09090b),
            foreground: hex(0xfafafa),
            surface: hex(0x18181b),
            surface_foreground: hex(0xfafafa),
            primary: hex(0x3b82f6),
            primary_foreground: hex(0xffffff),
            secondary: hex(0x27272a),
            secondary_foreground: hex(0xfafafa),
            muted: hex(0x27272a),
            muted_foreground: hex(0xa1a1aa),
            accent: hex(0x3b82f6),
            accent_foreground: hex(0xffffff),
            destructive: hex(0xef4444),
            destructive_foreground: hex(0xffffff),
            success: hex(0x22c55e),
            success_foreground: hex(0x052e16),
            warning: hex(0xf59e0b),
            warning_foreground: hex(0x451a03),
            border: hex(0x27272a),
            input: hex(0x27272a),
            ring: hex(0x1d4ed8),
            selection: hex(0x1e3a8a),
            overlay: scrim(0.45),
            // macOS dark overlay thumbs are translucent light gray.
            scrollbar_thumb: hsla(0., 0., 1., 0.3),
        }
    }
}