// ── ChronoMind Design Tokens ───────────────────────────────────
// Colors from PRD Section 9 (--cm-* CSS vars → Swift Color literals)
// Typography from PRD Section 9.2

import SwiftUI

// MARK: - Colors

enum CMColors {
    // Backgrounds
    static let bg = Color(hex: 0x0A0B0F)
    static let surface = Color(hex: 0x12141D)
    static let surfaceHover = Color(hex: 0x1A1D2A)
    static let border = Color(hex: 0x2A2D3A)

    // Text
    static let text = Color(hex: 0xE8ECF4)
    static let textSecondary = Color(hex: 0x8A92A6)
    static let textMuted = Color(hex: 0x5A6178)

    // Urgency
    static let critical = Color(hex: 0xFF4757)
    static let important = Color(hex: 0xFF9F43)
    static let standard = Color(hex: 0xFECA57)
    static let gentle = Color(hex: 0x2ED573)
    static let passive = Color(hex: 0x5B8DEE)

    // Accent
    static let accent = Color(hex: 0x5B8DEE)
    static let accentGlow = Color(hex: 0x5B8DEE, alpha: 0.2)

    // Semantic
    static let success = Color(hex: 0x2ED573)
    static let warning = Color(hex: 0xFECA57)
    static let error = Color(hex: 0xFF4757)

    // Light theme variants
    static let lightBg = Color(hex: 0xF8F9FC)
    static let lightSurface = Color.white
    static let lightSurfaceHover = Color(hex: 0xF0F2F8)
    static let lightBorder = Color(hex: 0xE2E5EE)
    static let lightText = Color(hex: 0x1A1D2A)
    static let lightTextSecondary = Color(hex: 0x5A6178)
    static let lightTextMuted = Color(hex: 0x8A92A6)

    /// Get urgency color for a given level
    static func urgencyColor(_ level: UrgencyLevel) -> Color {
        switch level {
        case .critical: return critical
        case .important: return important
        case .standard: return standard
        case .gentle: return gentle
        case .passive: return passive
        }
    }

    /// Get urgency background color (15% opacity)
    static func urgencyBg(_ level: UrgencyLevel) -> Color {
        urgencyColor(level).opacity(0.15)
    }

    /// Get urgency border color (40% opacity)
    static func urgencyBorder(_ level: UrgencyLevel) -> Color {
        urgencyColor(level).opacity(0.4)
    }
}

// MARK: - Typography

enum CMFonts {
    /// Display font — Space Grotesk (clock face, timer digits)
    static func display(size: CGFloat, weight: Font.Weight = .bold) -> Font {
        .system(size: size, weight: weight, design: .rounded)
    }

    /// Body font — Inter/SF Pro equivalent
    static func body(size: CGFloat, weight: Font.Weight = .regular) -> Font {
        .system(size: size, weight: weight, design: .default)
    }

    /// Mono font — JetBrains Mono (countdown digits, time displays)
    static func mono(size: CGFloat, weight: Font.Weight = .regular) -> Font {
        .system(size: size, weight: weight, design: .monospaced)
    }
}

// MARK: - Spacing

enum CMSpacing {
    static let xxs: CGFloat = 2
    static let xs: CGFloat = 4
    static let sm: CGFloat = 8
    static let md: CGFloat = 12
    static let lg: CGFloat = 16
    static let xl: CGFloat = 24
    static let xxl: CGFloat = 32
    static let xxxl: CGFloat = 48
}

// MARK: - Corner Radius

enum CMRadius {
    static let sm: CGFloat = 8
    static let md: CGFloat = 12
    static let lg: CGFloat = 16
    static let xl: CGFloat = 20
    static let full: CGFloat = 999
}

// MARK: - Shadows

enum CMShadow {
    static let sm = Color.black.opacity(0.1)
    static let md = Color.black.opacity(0.2)
    static let lg = Color.black.opacity(0.3)
    static let glow = CMColors.accent.opacity(0.3)
}