//
//  Theme.swift
//  wake
//
//  Created by fairclip on 2025/8/19.
//

import SwiftUI

// MARK: - 主题色管理
struct Theme {
    
    // MARK: - 主要颜色
    struct Colors {
        
        // MARK: - 品牌色
        static let primary = Color(hex: "FFB645")        // 主橙色
        static let primaryLight = Color(hex: "FFF8DE")   // 浅橙色
        static let primaryDark = Color(hex: "E6A03D")    // 深橙色
        
        // MARK: - 辅助色
        static let secondary = Color(hex: "6C7B7F")      // 灰蓝色
        static let accent = Color(hex: "FF6B6B")         // 强调红色
        
        // MARK: - 中性色
        static let background = Color(hex: "F8F9FA")     // 背景色
        static let surface = Color.white                 // 表面色
        static let surfaceSecondary = Color(hex: "F5F5F5") // 次级表面色
        static let surfaceTertiary = Color(hex: "F7F7F7") // 次级表面色
        
        // MARK: - 文本色
        static let textPrimary = Color.black             // 主文本色
        static let textSecondary = Color(hex: "6B7280")  // 次级文本色
        static let textTertiary = Color(hex: "9CA3AF")   // 三级文本色
        static let textInverse = Color.white             // 反色文本
        static let textMessage = Color(hex: "7B7B7B")    // 注释颜色
        static let textMessageMain = Color(hex: "000000")    // 注释主要颜色
        static let textWhite = Color(hex: "FFFFFF")    // 白色
        static let textWhiteSecondary = Color(hex: "FAFAFA")    // 白色次级
        
        // MARK: - 状态色
        static let success = Color(hex: "10B981")        // 成功色
        static let warning = Color(hex: "F59E0B")        // 警告色
        static let error = Color(hex: "EF4444")          // 错误色
        static let info = Color(hex: "3B82F6")           // 信息色
        
        // MARK: - 边框色
        static let border = Color(hex: "E5E7EB")         // 边框色
        static let borderLight = Color(hex: "F3F4F6")    // 浅边框色
        static let borderDark = Color(hex: "D1D5DB")     // 深边框色
        
        // MARK: - 订阅相关色
        static let freeBackground = primaryLight         // Free版背景
        static let pioneerBackground = primary           // Pioneer版背景
        static let subscribeButton = primary             // 订阅按钮色
        
        // MARK: - 卡片相关色
        static let cardBackground = Color.white         // 卡片背景
    }
    
    // MARK: - 渐变色
    struct Gradients {
        static let primaryGradient = LinearGradient(
            colors: [Colors.primary, Colors.primaryDark],
            startPoint: .topLeading,
            endPoint: .bottomTrailing
        )
        
        static let backgroundGradient = LinearGradient(
            colors: [Colors.background, Colors.surface],
            startPoint: .top,
            endPoint: .bottom
        )
        
        static let accentGradient = LinearGradient(
            colors: [Colors.accent, Color(hex: "FF8E8E")],
            startPoint: .leading,
            endPoint: .trailing
        )
    }
    
    // MARK: - 阴影
    struct Shadows {
        static let small = Color.black.opacity(0.1)
        static let medium = Color.black.opacity(0.15)
        static let large = Color.black.opacity(0.2)
        
        // 阴影配置
        static let cardShadow = (color: small, radius: CGFloat(4), x: CGFloat(0), y: CGFloat(2))
        static let buttonShadow = (color: medium, radius: CGFloat(6), x: CGFloat(0), y: CGFloat(3))
        static let modalShadow = (color: large, radius: CGFloat(12), x: CGFloat(0), y: CGFloat(8))
    }
    
    // MARK: - 圆角
    struct CornerRadius {
        static let small: CGFloat = 8
        static let medium: CGFloat = 12
        static let large: CGFloat = 16
        static let extraLarge: CGFloat = 20
        static let round: CGFloat = 50
    }
    
    // MARK: - 间距
    struct Spacing {
        static let xs: CGFloat = 4
        static let sm: CGFloat = 8
        static let md: CGFloat = 12
        static let lg: CGFloat = 16
        static let xl: CGFloat = 20
        static let xxl: CGFloat = 24
        static let xxxl: CGFloat = 32
    }
}

// MARK: - 便捷扩展
extension Color {
    /// 主题色快捷访问
    static var themePrimary: Color { Theme.Colors.primary }
    static var themePrimaryLight: Color { Theme.Colors.primaryLight }
    static var themeSecondary: Color { Theme.Colors.secondary }
    static var themeAccent: Color { Theme.Colors.accent }
    static var themeBackground: Color { Theme.Colors.background }
    static var themeSurface: Color { Theme.Colors.surface }
    static var themeTextPrimary: Color { Theme.Colors.textPrimary }
    static var themeTextSecondary: Color { Theme.Colors.textSecondary }
    static var themeTextMessage: Color { Theme.Colors.textMessage }
    static var themeTextMessageMain: Color { Theme.Colors.textMessageMain }
    static var themeTextWhite: Color { Theme.Colors.textWhite }
    static var themeTextWhiteSecondary: Color { Theme.Colors.textWhiteSecondary }
}

// MARK: - 预览
#Preview("Theme Colors") {
    ScrollView {
        VStack(spacing: Theme.Spacing.lg) {
            // 品牌色
            ColorPreviewSection(title: "品牌色", colors: [
                ("Primary", Theme.Colors.primary),
                ("Primary Light", Theme.Colors.primaryLight),
                ("Primary Dark", Theme.Colors.primaryDark)
            ])
            
            // 辅助色
            ColorPreviewSection(title: "辅助色", colors: [
                ("Secondary", Theme.Colors.secondary),
                ("Accent", Theme.Colors.accent)
            ])
            
            // 状态色
            ColorPreviewSection(title: "状态色", colors: [
                ("Success", Theme.Colors.success),
                ("Warning", Theme.Colors.warning),
                ("Error", Theme.Colors.error),
                ("Info", Theme.Colors.info)
            ])
        }
        .padding()
    }
    .background(Theme.Colors.background)
}

// MARK: - 预览辅助组件
struct ColorPreviewSection: View {
    let title: String
    let colors: [(String, Color)]
    
    var body: some View {
        VStack(alignment: .leading, spacing: Theme.Spacing.sm) {
            Text(title)
                .font(.headline)
                .foregroundColor(Theme.Colors.textPrimary)
            
            LazyVGrid(columns: Array(repeating: GridItem(.flexible()), count: 3), spacing: Theme.Spacing.sm) {
                ForEach(colors, id: \.0) { name, color in
                    VStack(spacing: Theme.Spacing.xs) {
                        Rectangle()
                            .fill(color)
                            .frame(height: 60)
                            .cornerRadius(Theme.CornerRadius.small)
                        
                        Text(name)
                            .font(.caption)
                            .foregroundColor(Theme.Colors.textSecondary)
                    }
                }
            }
        }
    }
}