import 'package:flutter/material.dart';
import 'package:riverpod_annotation/riverpod_annotation.dart';

part 'product_theme.g.dart';

/// 产品类型枚举
enum ProductType {
  /// 公共页面（登录、配网等）
  common,

  /// 毛绒机芯
  capybara,

  /// 电子吧唧 AI
  badgeAi,

  /// 普通吧唧
  badgeBasic,
}

/// 每个产品类型对应的主题配色
class ProductThemeData {
  /// 按钮渐变
  final LinearGradient buttonGradient;

  /// 强调色（用于图标、文字高亮、进度条、选中态等）
  final Color accentColor;

  /// 次强调色（用于阴影、选中背景等）
  final Color accentColorLight;

  /// 按钮阴影
  final List<BoxShadow> buttonShadows;

  const ProductThemeData({
    required this.buttonGradient,
    required this.accentColor,
    required this.accentColorLight,
    required this.buttonShadows,
  });
}

/// 各产品的主题定义
class ProductThemes {
  ProductThemes._();

  /// 公共/默认 — 蓝色色调 (cyan → blue → indigo → purple)
  static final common = ProductThemeData(
    buttonGradient: const LinearGradient(
      begin: Alignment.centerLeft,
      end: Alignment.centerRight,
      colors: [
        Color(0xFF22D3EE),
        Color(0xFF3B82F6),
        Color(0xFF6366F1),
        Color(0xFF8B5CF6),
      ],
      stops: [0.0, 0.35, 0.65, 1.0],
    ),
    accentColor: const Color(0xFF6366F1),
    accentColorLight: const Color(0xFF8B5CF6),
    buttonShadows: [
      BoxShadow(
        color: const Color(0xFF6366F1).withOpacity(0.4),
        offset: const Offset(0, 4),
        blurRadius: 20,
      ),
      BoxShadow(
        color: const Color(0xFF8B5CF6).withOpacity(0.2),
        offset: Offset.zero,
        blurRadius: 40,
      ),
    ],
  );

  /// 毛绒机芯 — 金色/暖棕色
  static final capybara = ProductThemeData(
    buttonGradient: const LinearGradient(
      begin: Alignment.topLeft,
      end: Alignment.bottomRight,
      colors: [Color(0xFFECCFA8), Color(0xFFC99672)],
    ),
    accentColor: const Color(0xFFC99672),
    accentColorLight: const Color(0xFFECCFA8),
    buttonShadows: [
      BoxShadow(
        color: const Color(0xFFC99672).withOpacity(0.35),
        offset: Offset.zero,
        blurRadius: 15,
      ),
      BoxShadow(
        color: const Color(0xFFC99672).withOpacity(0.25),
        offset: Offset.zero,
        blurRadius: 30,
      ),
      BoxShadow(
        color: const Color(0xFFC99672).withOpacity(0.4),
        offset: const Offset(0, 6),
        blurRadius: 20,
      ),
    ],
  );

  /// 电子吧唧 AI — 蓝渐变紫（与产品卡片一致）
  static final badgeAi = ProductThemeData(
    buttonGradient: const LinearGradient(
      begin: Alignment.centerLeft,
      end: Alignment.centerRight,
      colors: [
        Color(0xFF22D3EE),
        Color(0xFF60A5FA),
        Color(0xFF818CF8),
        Color(0xFFA78BFA),
      ],
      stops: [0.0, 0.35, 0.70, 1.0],
    ),
    accentColor: const Color(0xFF818CF8),
    accentColorLight: const Color(0xFFA78BFA),
    buttonShadows: [
      BoxShadow(
        color: const Color(0xFF818CF8).withOpacity(0.4),
        offset: const Offset(0, 4),
        blurRadius: 20,
      ),
      BoxShadow(
        color: const Color(0xFFA78BFA).withOpacity(0.2),
        offset: Offset.zero,
        blurRadius: 40,
      ),
    ],
  );

  /// 普通吧唧 — 粉渐变紫（与产品卡片一致）
  static final badgeBasic = ProductThemeData(
    buttonGradient: const LinearGradient(
      begin: Alignment.centerLeft,
      end: Alignment.centerRight,
      colors: [
        Color(0xFFC084FC),
        Color(0xFFD8B4FE),
        Color(0xFFC4B5FD),
        Color(0xFFA78BFA),
      ],
      stops: [0.0, 0.35, 0.70, 1.0],
    ),
    accentColor: const Color(0xFFC084FC),
    accentColorLight: const Color(0xFFD8B4FE),
    buttonShadows: [
      BoxShadow(
        color: const Color(0xFFC084FC).withOpacity(0.4),
        offset: const Offset(0, 4),
        blurRadius: 20,
      ),
      BoxShadow(
        color: const Color(0xFFA78BFA).withOpacity(0.2),
        offset: Offset.zero,
        blurRadius: 40,
      ),
    ],
  );

  /// 根据产品类型获取主题
  static ProductThemeData of(ProductType type) {
    switch (type) {
      case ProductType.common:
        return common;
      case ProductType.capybara:
        return capybara;
      case ProductType.badgeAi:
        return badgeAi;
      case ProductType.badgeBasic:
        return badgeBasic;
    }
  }
}

/// 全局当前产品类型 Notifier
@Riverpod(keepAlive: true)
class CurrentProductType extends _$CurrentProductType {
  @override
  ProductType build() => ProductType.common;

  void set(ProductType type) => state = type;
}

/// 当前产品主题（派生自产品类型）
@riverpod
ProductThemeData currentProductTheme(Ref ref) {
  return ProductThemes.of(ref.watch(currentProductTypeProvider));
}