//! Central color theme for the TUI — modern dark palette with neon accents.
//!
//! Flow: defines a single `Theme` marker struct with associated `Color`
//! consts, consumed by every `view/*` render function so styling stays
//! consistent and changeable from one place.
//!
//! Design: dark-primary background (#1a1b26 / Catppuccin Mocha inspired),
//! vibrant accent colors for semantic states, and muted tones for
//! secondary/background elements. This gives a modern "neon dashboard"
//! look that is easy on the eyes during long sessions.

use ratatui::style::Color;

/// Central palette of terminal colors used across all TUI render functions.
///
/// Every view module references colors as `Theme::NAME` instead of
/// hardcoding `ratatui::style::Color` values inline.
pub struct Theme;

impl Theme {
    // ── Base surface colors ──────────────────────────────────────────────
    /// Deep background — used for the main chat area and overlays.
    pub const BG: Color = Color::Rgb(24, 25, 38);
    /// Slightly lighter surface — for panels, cards, and input bars.
    pub const SURFACE: Color = Color::Rgb(30, 32, 48);
    /// Elevated surface — for dropdowns, toasts, and floating elements.
    pub const SURFACE_ELEVATED: Color = Color::Rgb(38, 40, 58);

    // ── Text colors ──────────────────────────────────────────────────────
    /// Primary text color (bright white).
    pub const TEXT: Color = Color::Rgb(220, 222, 245);
    /// Secondary / muted text.
    pub const TEXT_MUTED: Color = Color::Rgb(150, 152, 180);
    /// Dim / placeholder text.
    pub const TEXT_DIM: Color = Color::Rgb(90, 92, 120);

    // ── Accent colors ────────────────────────────────────────────────────
    /// Primary accent — cyan for borders, titles, selections.
    pub const PRIMARY: Color = Color::Rgb(0, 212, 255);
    /// Success / positive states — green.
    pub const SUCCESS: Color = Color::Rgb(80, 220, 130);
    /// Warning / in-progress states — yellow-orange.
    pub const WARNING: Color = Color::Rgb(255, 200, 80);
    /// Error / failure states — red.
    pub const ERROR: Color = Color::Rgb(255, 100, 110);
    /// Informational / neutral — blue.
    pub const INFO: Color = Color::Rgb(100, 170, 255);

    // ── Extended accent palette ──────────────────────────────────────────
    /// Purple accent — used for special highlights.
    pub const ACCENT_PURPLE: Color = Color::Rgb(180, 130, 255);
    #[allow(dead_code)]
    /// Pink / magenta accent.
    pub const ACCENT_PINK: Color = Color::Rgb(255, 120, 200);
    /// Orange accent.
    pub const ACCENT_ORANGE: Color = Color::Rgb(255, 160, 60);
    /// Teal accent.
    pub const ACCENT_TEAL: Color = Color::Rgb(60, 210, 200);

    // ── Border colors ────────────────────────────────────────────────────
    /// Standard border color.
    pub const BORDER: Color = Color::Rgb(50, 52, 72);
    #[allow(dead_code)]
    /// Focused / active border.
    pub const BORDER_FOCUS: Color = Color::Rgb(0, 180, 220);

    // ── Role badge colors ────────────────────────────────────────────────
    pub const ROLE_USER: Color = Color::Rgb(80, 220, 130);       // green
    pub const ROLE_ASSISTANT: Color = Color::Rgb(0, 212, 255);   // cyan
    pub const ROLE_SYSTEM: Color = Color::Rgb(100, 170, 255);    // blue
    pub const ROLE_TOOL: Color = Color::Rgb(255, 200, 80);       // yellow

    // ── Status colors ────────────────────────────────────────────────────
    pub const STATUS_BAR_BG: Color = Color::Rgb(20, 21, 34);
    pub const MODE_AUTO: Color = Color::Rgb(80, 220, 130);
    pub const MODE_YOLO: Color = Color::Rgb(255, 100, 110);

    // ── Code / markdown ──────────────────────────────────────────────────
    pub const CODE_BG: Color = Color::Rgb(20, 22, 35);
    pub const CODE_BAR: Color = Color::Rgb(40, 42, 62);
    pub const BLOCKQUOTE_BAR: Color = Color::Rgb(100, 170, 255);

    // ── Misc ─────────────────────────────────────────────────────────────
    /// Highlight / selection background.
    pub const HIGHLIGHT: Color = Color::Rgb(0, 140, 180);
    /// Dim highlight (for non-selected items).
    pub const HIGHLIGHT_DIM: Color = Color::Rgb(30, 40, 60);
    #[allow(dead_code)]
    /// Scrollbar track.
    pub const SCROLLBAR_BG: Color = Color::Rgb(35, 37, 55);
    #[allow(dead_code)]
    /// Scrollbar thumb.
    pub const SCROLLBAR_FG: Color = Color::Rgb(60, 62, 85);
}