import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:shadcn_ui/shadcn_ui.dart';
import 'package:provider/provider.dart';
import 'package:google_fonts/google_fonts.dart';
import '../../../core/theme/app_color_scheme.dart';
import '../../../core/theme/app_spacing.dart';
import '../../../core/utils/toast_utils.dart';
import '../../../core/event/app_event_bus.dart';
import '../../../data/services/bonus_service.dart';
import '../../../providers/asset_provider.dart';
import '../../../providers/auth_provider.dart';
import '../../components/glass_panel.dart';
import '../../components/neon_glow.dart';

/// 福利中心页面
class WelfareCenterPage extends StatefulWidget {
  const WelfareCenterPage({super.key});

  @override
  State<WelfareCenterPage> createState() => _WelfareCenterPageState();
}

class _WelfareCenterPageState extends State<WelfareCenterPage> {
  Map<String, dynamic>? _welfareData;
  bool _isLoading = true;

  @override
  void initState() {
    super.initState();
    WidgetsBinding.instance.addPostFrameCallback((_) => _loadData());
  }

  Future<void> _loadData() async {
    try {
      final bonusService = context.read<BonusService>();
      final response = await bonusService.getWelfareStatus();
      if (mounted) {
        setState(() {
          _welfareData = response.data;
          _isLoading = false;
        });
      }
    } catch (_) {
      if (mounted) setState(() => _isLoading = false);
    }
  }

  @override
  Widget build(BuildContext context) {
    final colorScheme = Theme.of(context).colorScheme;

    return Scaffold(
      backgroundColor: colorScheme.background,
      appBar: AppBar(
        backgroundColor: Colors.transparent,
        elevation: 0,
        title: Text(
          '福利中心',
          style: GoogleFonts.spaceGrotesk(
            fontWeight: FontWeight.bold,
            color: colorScheme.onSurface,
          ),
        ),
        leading: IconButton(
          icon: Icon(LucideIcons.chevronLeft, color: colorScheme.onSurface),
          onPressed: () => Navigator.of(context).pop(),
        ),
      ),
      body: _isLoading
          ? Center(
              child: CircularProgressIndicator(color: colorScheme.primary),
            )
          : RefreshIndicator(
              onRefresh: _loadData,
              color: colorScheme.primary,
              child: SingleChildScrollView(
                physics: const AlwaysScrollableScrollPhysics(),
                padding: AppSpacing.pagePadding,
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    // 推广码卡片
                    _buildReferralCodeCard(colorScheme),
                    SizedBox(height: AppSpacing.lg),

                    // 首充福利卡片
                    _buildNewUserBonusCard(colorScheme),
                    SizedBox(height: AppSpacing.lg),

                    // 推广奖励列表
                    _buildReferralRewardsSection(colorScheme),
                    SizedBox(height: AppSpacing.lg),

                    // 规则说明
                    _buildRulesCard(colorScheme),
                  ],
                ),
              ),
            ),
    );
  }

  /// 推广码卡片
  Widget _buildReferralCodeCard(ColorScheme colorScheme) {
    final referralCode = _welfareData?['referralCode'] as String? ?? '';

    return GlassPanel(
      padding: EdgeInsets.all(AppSpacing.lg),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Row(
            children: [
              Container(
                padding: EdgeInsets.all(AppSpacing.sm),
                decoration: BoxDecoration(
                  color: colorScheme.primary.withOpacity(0.1),
                  borderRadius: BorderRadius.circular(AppRadius.md),
                ),
                child: Icon(
                  LucideIcons.users,
                  color: colorScheme.primary,
                  size: 20,
                ),
              ),
              SizedBox(width: AppSpacing.md),
              Text(
                '我的推广码',
                style: GoogleFonts.spaceGrotesk(
                  fontSize: 16,
                  fontWeight: FontWeight.bold,
                  color: colorScheme.onSurface,
                ),
              ),
            ],
          ),
          SizedBox(height: AppSpacing.lg),
          Container(
            width: double.infinity,
            padding: EdgeInsets.symmetric(
              horizontal: AppSpacing.lg,
              vertical: AppSpacing.md,
            ),
            decoration: BoxDecoration(
              color: colorScheme.surfaceContainerHigh,
              borderRadius: BorderRadius.circular(AppRadius.lg),
              border: Border.all(
                color: colorScheme.outlineVariant.withOpacity(0.2),
              ),
            ),
            child: Row(
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                Text(
                  referralCode.isEmpty ? '暂无推广码' : referralCode,
                  style: GoogleFonts.spaceGrotesk(
                    fontSize: 24,
                    fontWeight: FontWeight.bold,
                    letterSpacing: 4,
                    color: referralCode.isEmpty
                        ? colorScheme.onSurfaceVariant
                        : colorScheme.primary,
                  ),
                ),
                if (referralCode.isNotEmpty) ...[
                  SizedBox(width: AppSpacing.md),
                  GestureDetector(
                    onTap: () {
                      Clipboard.setData(ClipboardData(text: referralCode));
                      ToastUtils.show('推广码已复制');
                    },
                    child: Container(
                      padding: EdgeInsets.all(AppSpacing.xs + 2),
                      decoration: BoxDecoration(
                        color: colorScheme.primary.withOpacity(0.1),
                        borderRadius: BorderRadius.circular(AppRadius.sm),
                      ),
                      child: Icon(
                        LucideIcons.copy,
                        size: 18,
                        color: colorScheme.primary,
                      ),
                    ),
                  ),
                ],
              ],
            ),
          ),
          SizedBox(height: AppSpacing.sm),
          Text(
            '分享推广码给好友，好友注册并充值满1000u后您可领取100u奖励',
            style: TextStyle(
              fontSize: 11,
              color: colorScheme.onSurfaceVariant,
            ),
          ),
        ],
      ),
    );
  }

  /// 首充福利卡片
  Widget _buildNewUserBonusCard(ColorScheme colorScheme) {
    final newUserBonus = _welfareData?['newUserBonus'] as Map<String, dynamic>?;
    final eligible = newUserBonus?['eligible'] as bool? ?? false;
    final claimed = newUserBonus?['claimed'] as bool? ?? false;
    final deposited = newUserBonus?['deposited'] as bool? ?? false;

    String statusText;
    Color statusColor;
    String buttonText;
    bool canClaim;

    if (claimed) {
      statusText = '100 USDT 已领取';
      statusColor = AppColorScheme.up;
      buttonText = '已领取';
      canClaim = false;
    } else if (eligible) {
      statusText = '符合条件，立即领取！';
      statusColor = colorScheme.primary;
      buttonText = '领取 100u';
      canClaim = true;
    } else {
      statusText = deposited ? '已完成充值' : '完成首次充值后可领取';
      statusColor = colorScheme.onSurfaceVariant;
      buttonText = '未解锁';
      canClaim = false;
    }

    return GlassPanel(
      padding: EdgeInsets.all(AppSpacing.lg),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Row(
            children: [
              Container(
                padding: EdgeInsets.all(AppSpacing.sm),
                decoration: BoxDecoration(
                  color: (claimed ? AppColorScheme.up : colorScheme.primary)
                      .withOpacity(0.1),
                  borderRadius: BorderRadius.circular(AppRadius.md),
                ),
                child: Icon(
                  claimed ? LucideIcons.check : LucideIcons.gift,
                  color: claimed ? AppColorScheme.up : colorScheme.primary,
                  size: 20,
                ),
              ),
              SizedBox(width: AppSpacing.md),
              Expanded(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Text(
                      '首充福利',
                      style: GoogleFonts.spaceGrotesk(
                        fontSize: 16,
                        fontWeight: FontWeight.bold,
                        color: colorScheme.onSurface,
                      ),
                    ),
                    SizedBox(height: 2),
                    Text(
                      statusText,
                      style: TextStyle(
                        fontSize: 12,
                        color: statusColor,
                      ),
                    ),
                  ],
                ),
              ),
              SizedBox(
                child: NeonButton(
                  text: buttonText,
                  type: canClaim ? NeonButtonType.primary : NeonButtonType.outline,
                  onPressed: canClaim ? () => _claimNewUserBonus() : null,
                  height: 36,
                  showGlow: canClaim,
                ),
              ),
            ],
          ),
          SizedBox(height: AppSpacing.md),
          Text(
            '新用户首次充值完成后可领取 100 USDT',
            style: TextStyle(
              fontSize: 11,
              color: colorScheme.onSurfaceVariant,
            ),
          ),
        ],
      ),
    );
  }

  /// 推广奖励列表
  Widget _buildReferralRewardsSection(ColorScheme colorScheme) {
    final referralRewards =
        _welfareData?['referralRewards'] as List<dynamic>? ?? [];

    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Text(
          '推广奖励',
          style: GoogleFonts.spaceGrotesk(
            fontSize: 16,
            fontWeight: FontWeight.bold,
            color: colorScheme.onSurface,
          ),
        ),
        SizedBox(height: AppSpacing.sm),
        Text(
          '被推广人每累计充值满 1000u，您可领取 100u 奖励（每人最多8次）',
          style: TextStyle(
            fontSize: 12,
            color: colorScheme.onSurfaceVariant,
          ),
        ),
        SizedBox(height: AppSpacing.md),
        if (referralRewards.isEmpty)
          GlassPanel(
            padding: EdgeInsets.all(AppSpacing.xl),
            child: Center(
              child: Column(
                children: [
                  Icon(
                    LucideIcons.users,
                    size: 36,
                    color: colorScheme.onSurfaceVariant.withOpacity(0.4),
                  ),
                  SizedBox(height: AppSpacing.sm),
                  Text(
                    '暂无推广用户',
                    style: TextStyle(
                      color: colorScheme.onSurfaceVariant,
                      fontSize: 13,
                    ),
                  ),
                ],
              ),
            ),
          )
        else
          ...referralRewards.map((item) {
            final data = item as Map<String, dynamic>;
            return _buildReferralRewardCard(data, colorScheme);
          }),
      ],
    );
  }

  Widget _buildReferralRewardCard(
      Map<String, dynamic> data, ColorScheme colorScheme) {
    final username = data['username'] as String? ?? '';
    final totalDeposit = data['totalDeposit']?.toString() ?? '0';
    final claimableCount = data['claimableCount'] as int? ?? 0;
    final milestones = data['milestones'] as List<dynamic>? ?? [];

    return Padding(
      padding: EdgeInsets.only(bottom: AppSpacing.md),
      child: GlassPanel(
        padding: EdgeInsets.all(AppSpacing.md),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: [
                Row(
                  children: [
                    CircleAvatar(
                      radius: 16,
                      backgroundColor: colorScheme.primary.withOpacity(0.1),
                      child: Text(
                        username.isNotEmpty ? username[0].toUpperCase() : '?',
                        style: TextStyle(
                          color: colorScheme.primary,
                          fontWeight: FontWeight.bold,
                          fontSize: 14,
                        ),
                      ),
                    ),
                    SizedBox(width: AppSpacing.sm),
                    Text(
                      username,
                      style: GoogleFonts.spaceGrotesk(
                        fontSize: 14,
                        fontWeight: FontWeight.w600,
                        color: colorScheme.onSurface,
                      ),
                    ),
                  ],
                ),
                Column(
                  crossAxisAlignment: CrossAxisAlignment.end,
                  children: [
                    Text(
                      '累计充值: $totalDeposit U',
                      style: TextStyle(
                        fontSize: 12,
                        color: colorScheme.onSurfaceVariant,
                      ),
                    ),
                    if (claimableCount > 0)
                      Text(
                        '$claimableCount 个可领取',
                        style: TextStyle(
                          fontSize: 11,
                          color: colorScheme.primary,
                          fontWeight: FontWeight.w600,
                        ),
                      ),
                  ],
                ),
              ],
            ),
            SizedBox(height: AppSpacing.sm),
            // 里程碑进度
            Wrap(
              spacing: 6,
              runSpacing: 6,
              children: milestones.map((m) {
                final milestone = m as Map<String, dynamic>;
                final earned = milestone['earned'] as bool? ?? false;
                final claimed = milestone['claimed'] as bool? ?? false;
                final claimable = milestone['claimable'] as bool? ?? false;
                final milestoneNum = milestone['milestone'] as int? ?? 0;

                Color bgColor;
                Color textColor;
                VoidCallback? onTap;

                if (claimed) {
                  bgColor = AppColorScheme.up.withOpacity(0.15);
                  textColor = AppColorScheme.up;
                  onTap = null;
                } else if (claimable) {
                  bgColor = colorScheme.primary.withOpacity(0.15);
                  textColor = colorScheme.primary;
                  onTap = () => _claimReferralBonus(
                    data['userId'] as int,
                    milestoneNum,
                  );
                } else if (earned) {
                  bgColor = colorScheme.surfaceContainerHigh;
                  textColor = colorScheme.onSurfaceVariant;
                  onTap = null;
                } else {
                  bgColor = colorScheme.surfaceContainerHighest
                      .withOpacity(0.5);
                  textColor = colorScheme.onSurfaceVariant.withOpacity(0.5);
                  onTap = null;
                }

                return GestureDetector(
                  onTap: onTap,
                  child: Container(
                    padding: EdgeInsets.symmetric(
                      horizontal: 10,
                      vertical: 6,
                    ),
                    decoration: BoxDecoration(
                      color: bgColor,
                      borderRadius: BorderRadius.circular(AppRadius.md),
                      border: Border.all(
                        color: claimable
                            ? colorScheme.primary.withOpacity(0.3)
                            : Colors.transparent,
                      ),
                    ),
                    child: Row(
                      mainAxisSize: MainAxisSize.min,
                      children: [
                        if (claimed)
                          Icon(LucideIcons.check, size: 12, color: textColor)
                        else if (claimable)
                          Icon(LucideIcons.gift, size: 12, color: textColor),
                        if (claimed || claimable) SizedBox(width: 4),
                        Text(
                          '${milestoneNum}k',
                          style: TextStyle(
                            fontSize: 11,
                            fontWeight: FontWeight.w600,
                            color: textColor,
                          ),
                        ),
                      ],
                    ),
                  ),
                );
              }).toList(),
            ),
          ],
        ),
      ),
    );
  }

  /// 规则说明
  Widget _buildRulesCard(ColorScheme colorScheme) {
    return Container(
      padding: EdgeInsets.all(AppSpacing.md),
      decoration: BoxDecoration(
        color: colorScheme.surfaceContainerHigh.withOpacity(0.3),
        borderRadius: BorderRadius.circular(AppRadius.lg),
        border: Border.all(
          color: colorScheme.outlineVariant.withOpacity(0.1),
        ),
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Row(
            children: [
              Icon(LucideIcons.info, size: 16, color: colorScheme.onSurfaceVariant),
              SizedBox(width: AppSpacing.sm),
              Text(
                '规则说明',
                style: TextStyle(
                  fontSize: 13,
                  fontWeight: FontWeight.w600,
                  color: colorScheme.onSurface,
                ),
              ),
            ],
          ),
          SizedBox(height: AppSpacing.sm),
          _buildRuleItem('新用户首次充值完成后可领取 100 USDT 首充福利', colorScheme),
          _buildRuleItem('被推广人累计充值每满 1000u，推广人可领 100u', colorScheme),
          _buildRuleItem('每位被推广人最多可触发 8 次推广奖励', colorScheme),
          _buildRuleItem('所有奖励将直接存入资金账户', colorScheme),
        ],
      ),
    );
  }

  Widget _buildRuleItem(String text, ColorScheme colorScheme) {
    return Padding(
      padding: EdgeInsets.symmetric(vertical: 3),
      child: Row(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Container(
            margin: EdgeInsets.only(top: 6),
            width: 4,
            height: 4,
            decoration: BoxDecoration(
              color: colorScheme.onSurfaceVariant,
              shape: BoxShape.circle,
            ),
          ),
          SizedBox(width: AppSpacing.sm),
          Expanded(
            child: Text(
              text,
              style: TextStyle(
                fontSize: 12,
                color: colorScheme.onSurfaceVariant,
              ),
            ),
          ),
        ],
      ),
    );
  }

  Future<void> _claimNewUserBonus() async {
    try {
      final bonusService = context.read<BonusService>();
      final response = await bonusService.claimNewUserBonus();
      if (!mounted) return;

      if (response.success) {
        context.read<AssetProvider>().refreshAll(force: true);
        context.read<AppEventBus>().fire(AppEventType.assetChanged);
        ToastUtils.show('领取成功！100 USDT 已到账');
        _loadData();
      } else {
        ToastUtils.show(response.message ?? '领取失败');
      }
    } catch (e) {
      ToastUtils.show('领取失败: $e');
    }
  }

  Future<void> _claimReferralBonus(int referredUserId, int milestone) async {
    try {
      final bonusService = context.read<BonusService>();
      final response = await bonusService.claimReferralBonus(
        referredUserId,
        milestone,
      );
      if (!mounted) return;

      if (response.success) {
        context.read<AssetProvider>().refreshAll(force: true);
        context.read<AppEventBus>().fire(AppEventType.assetChanged);
        ToastUtils.show('领取成功！100 USDT 已到账');
        _loadData();
      } else {
        ToastUtils.show(response.message ?? '领取失败');
      }
    } catch (e) {
      ToastUtils.show('领取失败: $e');
    }
  }
}