import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';
import '../../../core/constants/app_colors.dart';
import '../../../core/router/routes.dart';
import '../../../core/utils/format_utils.dart';
import '../../../domain/entities/contribution.dart';
import '../../providers/user_providers.dart';
import '../../providers/contribution_providers.dart';
import '../../widgets/shimmer_loading.dart';

class ContributionPage extends ConsumerWidget {
  const ContributionPage({super.key});

  // 品牌色彩（不随主题变化）
  static const Color _orange = AppColors.orange;
  static const Color _green = AppColors.primary;

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final user = ref.watch(userNotifierProvider);
    final accountSequence = user.accountSequence ?? '';
    final contributionAsync = ref.watch(contributionProvider(accountSequence));
    // 获取预估收益
    final estimatedEarnings = ref.watch(estimatedEarningsProvider(accountSequence));
    final statsAsync = ref.watch(contributionStatsProvider);
    // 获取积分股池余量
    final sharePoolAsync = ref.watch(sharePoolBalanceProvider);

    // Extract loading state and data from AsyncValue
    final isLoading = contributionAsync.isLoading;
    final contribution = contributionAsync.valueOrNull;
    final hasError = contributionAsync.hasError;
    final error = contributionAsync.error;
    final isStatsLoading = statsAsync.isLoading;
    final isSharePoolLoading = sharePoolAsync.isLoading;
    final sharePoolBalance = sharePoolAsync.valueOrNull;

    return Scaffold(
      backgroundColor: AppColors.backgroundOf(context),
      body: SafeArea(
        bottom: false,
        child: RefreshIndicator(
          onRefresh: () async {
            ref.invalidate(contributionProvider(accountSequence));
            ref.invalidate(contributionStatsProvider);
            ref.invalidate(sharePoolBalanceProvider);
          },
          child: hasError && contribution == null
              ? Center(
                  child: Column(
                    mainAxisAlignment: MainAxisAlignment.center,
                    children: [
                      const Icon(Icons.error_outline, size: 48, color: AppColors.error),
                      const SizedBox(height: 16),
                      Text('加载失败: $error'),
                      const SizedBox(height: 16),
                      ElevatedButton(
                        onPressed: () => ref.invalidate(contributionProvider(accountSequence)),
                        child: const Text('重试'),
                      ),
                    ],
                  ),
                )
              : CustomScrollView(
                  slivers: [
                    // 顶部导航栏
                    SliverToBoxAdapter(child: _buildAppBar(context)),
                    // 内容
                    SliverPadding(
                      padding: const EdgeInsets.all(16),
                      sliver: SliverList(
                        delegate: SliverChildListDelegate([
                          // 总贡献值卡片
                          _buildTotalContributionCard(context, ref, contribution, isLoading, sharePoolBalance, isSharePoolLoading),
                          const SizedBox(height: 16),
                          // 三栏统计
                          _buildThreeColumnStats(context, ref, contribution, isLoading),
                          const SizedBox(height: 16),
                          // 今日预估收益
                          _buildTodayEstimateCard(context, ref, estimatedEarnings, isLoading || isStatsLoading),
                          const SizedBox(height: 16),
                          // 贡献值明细（三类汇总）
                          _buildContributionDetailCard(context, ref, contribution, isLoading),
                          const SizedBox(height: 16),
                          // 团队下贡献值统计
                          _buildTeamStatsCard(context, contribution, isLoading),
                          const SizedBox(height: 16),
                          // 贡献值失效倒计时
                          _buildExpirationCard(context, contribution, isLoading),
                          const SizedBox(height: 24),
                        ]),
                      ),
                    ),
                  ],
                ),
        ),
      ),
    );
  }

  Widget _buildAppBar(BuildContext context) {
    final isDark = AppColors.isDark(context);
    return Container(
      color: AppColors.cardOf(context),
      padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
      child: Row(
        children: [
          // Logo
          Container(
            width: 32,
            height: 32,
            decoration: BoxDecoration(
              color: _orange.withOpacity(isDark ? 0.2 : 0.1),
              borderRadius: BorderRadius.circular(8),
            ),
            child: const Icon(Icons.eco, color: _orange, size: 20),
          ),
          const SizedBox(width: 8),
          Text(
            '股行',
            style: TextStyle(
              fontSize: 18,
              fontWeight: FontWeight.bold,
              color: AppColors.textPrimaryOf(context),
              letterSpacing: 0.45,
            ),
          ),
          const Spacer(),
          // 客服
          IconButton(
            icon: Icon(Icons.headset_mic_outlined, color: AppColors.textSecondaryOf(context)),
            onPressed: () {},
          ),
          // 通知（带红点）
          Stack(
            children: [
              IconButton(
                icon: Icon(Icons.notifications_outlined, color: AppColors.textSecondaryOf(context)),
                onPressed: () {},
              ),
              Positioned(
                right: 10,
                top: 10,
                child: Container(
                  width: 8,
                  height: 8,
                  decoration: const BoxDecoration(
                    color: Colors.red,
                    shape: BoxShape.circle,
                  ),
                ),
              ),
            ],
          ),
        ],
      ),
    );
  }

  Widget _buildTotalContributionCard(
    BuildContext context,
    WidgetRef ref,
    Contribution? contribution,
    bool isLoading,
    SharePoolBalance? sharePoolBalance,
    bool isSharePoolLoading,
  ) {
    final isDark = AppColors.isDark(context);
    final total = contribution?.totalContribution ?? '0';
    final hideAmounts = ref.watch(hideAmountsProvider);
    return Container(
      padding: const EdgeInsets.all(20),
      decoration: BoxDecoration(
        color: AppColors.cardOf(context),
        borderRadius: BorderRadius.circular(16),
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [
              Text(
                '总贡献值',
                style: TextStyle(fontSize: 14, fontWeight: FontWeight.w500, color: AppColors.textSecondaryOf(context)),
              ),
              GestureDetector(
                onTap: () {
                  ref.read(hideAmountsProvider.notifier).state = !hideAmounts;
                },
                child: Icon(
                  hideAmounts ? Icons.visibility_off_outlined : Icons.visibility_outlined,
                  color: AppColors.textMutedOf(context),
                  size: 18,
                ),
              ),
            ],
          ),
          const SizedBox(height: 8),
          DataText(
            data: isLoading ? null : (hideAmounts ? '******' : formatAmount(total)),
            isLoading: isLoading,
            placeholder: '----',
            style: const TextStyle(
              fontSize: 30,
              fontWeight: FontWeight.bold,
              color: _orange,
              letterSpacing: -0.75,
            ),
          ),
          const SizedBox(height: 12),
          // 积分股池实时余量
          Row(
            children: [
              Text(
                '积分股池实时余量: ',
                style: TextStyle(fontSize: 12, color: AppColors.textSecondaryOf(context)),
              ),
              isSharePoolLoading
                  ? const ShimmerText(
                      placeholder: '----',
                      style: TextStyle(fontSize: 12, fontWeight: FontWeight.w600, color: _orange),
                    )
                  : Text(
                      hideAmounts ? '******' : formatAmount(sharePoolBalance?.total ?? '0'),
                      style: const TextStyle(fontSize: 12, fontWeight: FontWeight.w600, color: _orange),
                    ),
            ],
          ),
          const SizedBox(height: 8),
          // 有效期标签
          Container(
            padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 6),
            decoration: BoxDecoration(
              color: isDark ? AppColors.backgroundOf(context) : const Color(0xFFF9FAFB),
              borderRadius: BorderRadius.circular(999),
            ),
            child: Row(
              mainAxisSize: MainAxisSize.min,
              children: [
                Icon(Icons.info_outline, size: 14, color: AppColors.textMutedOf(context)),
                const SizedBox(width: 6),
                Text(
                  '贡献值有效期: 730 天',
                  style: TextStyle(fontSize: 12, color: AppColors.textSecondaryOf(context)),
                ),
              ],
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildThreeColumnStats(BuildContext context, WidgetRef ref, Contribution? contribution, bool isLoading) {
    final hideAmounts = ref.watch(hideAmountsProvider);
    return Container(
      padding: const EdgeInsets.all(20),
      decoration: BoxDecoration(
        color: AppColors.cardOf(context),
        borderRadius: BorderRadius.circular(16),
      ),
      child: Row(
        children: [
          _buildStatColumn(context, '个人贡献值', contribution?.personalContribution, isLoading, false, hideAmounts),
          _buildStatColumn(context, '团队下贡献值', contribution?.teamLevelContribution, isLoading, true, hideAmounts),
          _buildStatColumn(context, '团队上贡献值', contribution?.teamBonusContribution, isLoading, true, hideAmounts),
        ],
      ),
    );
  }

  Widget _buildStatColumn(BuildContext context, String label, String? value, bool isLoading, bool showLeftBorder, bool hideAmounts) {
    return Expanded(
      child: Container(
        decoration: showLeftBorder
            ? BoxDecoration(
                border: Border(left: BorderSide(color: AppColors.borderOf(context), width: 1)),
              )
            : null,
        padding: const EdgeInsets.symmetric(horizontal: 4),
        child: Column(
          children: [
            Text(label, style: TextStyle(fontSize: 12, color: AppColors.textSecondaryOf(context))),
            const SizedBox(height: 4),
            DataText(
              data: value != null ? (hideAmounts ? '****' : formatAmount(value)) : null,
              isLoading: isLoading,
              placeholder: '--',
              style: TextStyle(fontSize: 14, fontWeight: FontWeight.bold, color: AppColors.textPrimaryOf(context)),
              textAlign: TextAlign.center,
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildTodayEstimateCard(BuildContext context, WidgetRef ref, EstimatedEarnings earnings, bool isLoading) {
    final isDark = AppColors.isDark(context);
    final hideAmounts = ref.watch(hideAmountsProvider);
    return Container(
      padding: const EdgeInsets.all(20),
      decoration: BoxDecoration(
        color: AppColors.cardOf(context),
        borderRadius: BorderRadius.circular(16),
      ),
      child: Row(
        children: [
          // 图标
          Container(
            width: 40,
            height: 40,
            decoration: BoxDecoration(
              color: _green.withOpacity(isDark ? 0.2 : 0.1),
              borderRadius: BorderRadius.circular(12),
            ),
            child: const Icon(Icons.trending_up, color: _green, size: 24),
          ),
          const SizedBox(width: 12),
          // 文字说明
          Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(
                  '今日预估收益',
                  style: TextStyle(fontSize: 14, fontWeight: FontWeight.w500, color: AppColors.textSecondaryOf(context)),
                ),
                Text(
                  '基于当前贡献值占比计算',
                  style: TextStyle(fontSize: 12, color: AppColors.textMutedOf(context)),
                ),
              ],
            ),
          ),
          // 收益数值
          Column(
            crossAxisAlignment: CrossAxisAlignment.end,
            children: [
              isLoading
                  ? const ShimmerText(
                      placeholder: '-- 积分股',
                      style: TextStyle(fontSize: 14, fontWeight: FontWeight.bold, color: _green),
                    )
                  : Text.rich(
                      TextSpan(
                        children: [
                          TextSpan(
                            text: hideAmounts ? '****' : (earnings.isValid ? formatAmount(earnings.dailyShares) : '--'),
                            style: const TextStyle(
                              fontSize: 18,
                              fontWeight: FontWeight.bold,
                              color: _green,
                            ),
                          ),
                          const TextSpan(
                            text: ' 积分股',
                            style: TextStyle(fontSize: 12, color: _green),
                          ),
                        ],
                      ),
                    ),
            ],
          ),
        ],
      ),
    );
  }

  Widget _buildContributionDetailCard(
    BuildContext context,
    WidgetRef ref,
    Contribution? contribution,
    bool isLoading,
  ) {
    final isDark = AppColors.isDark(context);
    final hideAmounts = ref.watch(hideAmountsProvider);
    return Container(
      padding: const EdgeInsets.all(20),
      decoration: BoxDecoration(
        color: AppColors.cardOf(context),
        borderRadius: BorderRadius.circular(16),
      ),
      child: Column(
        children: [
          // 标题行
          Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [
              Text(
                '贡献值明细',
                style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold, color: AppColors.textPrimaryOf(context)),
              ),
              GestureDetector(
                onTap: () {
                  context.push(Routes.contributionRecords);
                },
                child: const Row(
                  children: [
                    Text('查看全部', style: TextStyle(fontSize: 12, color: _orange)),
                    Icon(Icons.chevron_right, size: 14, color: _orange),
                  ],
                ),
              ),
            ],
          ),
          const SizedBox(height: 16),
          // 三类汇总
          if (isLoading)
            _buildDetailSummaryShimmer(context)
          else
            Column(
              children: [
                _buildDetailSummaryRow(
                  context: context,
                  isDark: isDark,
                  icon: Icons.eco_outlined,
                  iconColor: _orange,
                  title: '本人',
                  subtitle: '个人参与产生的贡献值',
                  amount: contribution?.personalContribution ?? '0',
                  hideAmounts: hideAmounts,
                ),
                Divider(height: 24, color: AppColors.borderOf(context)),
                _buildDetailSummaryRow(
                  context: context,
                  isDark: isDark,
                  icon: Icons.groups_outlined,
                  iconColor: Colors.blue,
                  title: '团队下贡献值',
                  subtitle: '股行用户引荐',
                  amount: contribution?.teamLevelContribution ?? '0',
                  hideAmounts: hideAmounts,
                ),
                Divider(height: 24, color: AppColors.borderOf(context)),
                _buildDetailSummaryRow(
                  context: context,
                  isDark: isDark,
                  icon: Icons.card_giftcard_outlined,
                  iconColor: Colors.purple,
                  title: '团队上贡献值',
                  subtitle: '满足条件后获得的额外奖励贡献值',
                  amount: contribution?.teamBonusContribution ?? '0',
                  hideAmounts: hideAmounts,
                ),
              ],
            ),
        ],
      ),
    );
  }

  Widget _buildDetailSummaryShimmer(BuildContext context) {
    return Column(
      children: [
        _buildShimmerSummaryRow(context),
        Divider(height: 24, color: AppColors.borderOf(context)),
        _buildShimmerSummaryRow(context),
        Divider(height: 24, color: AppColors.borderOf(context)),
        _buildShimmerSummaryRow(context),
      ],
    );
  }

  Widget _buildShimmerSummaryRow(BuildContext context) {
    return Row(
      children: [
        const ShimmerBox(width: 40, height: 40),
        const SizedBox(width: 12),
        Expanded(
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              ShimmerText(
                placeholder: '本人',
                style: TextStyle(fontSize: 14, fontWeight: FontWeight.w500, color: AppColors.textPrimaryOf(context)),
              ),
              const SizedBox(height: 2),
              ShimmerText(
                placeholder: '个人参与产生的贡献值',
                style: TextStyle(fontSize: 12, color: AppColors.textSecondaryOf(context)),
              ),
            ],
          ),
        ),
        const ShimmerText(
          placeholder: '+1,000',
          style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold, color: _green),
        ),
      ],
    );
  }

  Widget _buildDetailSummaryRow({
    required BuildContext context,
    required bool isDark,
    required IconData icon,
    required Color iconColor,
    required String title,
    required String subtitle,
    required String amount,
    required bool hideAmounts,
  }) {
    return Row(
      children: [
        Container(
          width: 40,
          height: 40,
          decoration: BoxDecoration(
            color: iconColor.withOpacity(isDark ? 0.2 : 0.1),
            borderRadius: BorderRadius.circular(10),
          ),
          child: Icon(icon, color: iconColor, size: 22),
        ),
        const SizedBox(width: 12),
        Expanded(
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Text(
                title,
                style: TextStyle(fontSize: 14, fontWeight: FontWeight.w500, color: AppColors.textPrimaryOf(context)),
              ),
              const SizedBox(height: 2),
              Text(
                subtitle,
                style: TextStyle(fontSize: 11, color: AppColors.textMutedOf(context)),
              ),
            ],
          ),
        ),
        Text(
          hideAmounts ? '****' : formatAmount(amount),
          style: const TextStyle(fontSize: 16, fontWeight: FontWeight.bold, color: _green),
        ),
      ],
    );
  }

  Widget _buildTeamStatsCard(BuildContext context, Contribution? contribution, bool isLoading) {
    return Container(
      padding: const EdgeInsets.all(20),
      decoration: BoxDecoration(
        color: AppColors.cardOf(context),
        borderRadius: BorderRadius.circular(16),
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Text(
            '团队下贡献值统计',
            style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold, color: AppColors.textPrimaryOf(context)),
          ),
          const SizedBox(height: 16),
          // 第一行
          Row(
            children: [
              _buildTeamStatItem(
                context,
                '引荐人数',
                contribution?.directReferralAdoptedCount.toString(),
                '人',
                isLoading,
              ),
              const SizedBox(width: 16),
              _buildTeamStatItem(
                context,
                '已解锁上级',
                '15',
                '',
                isLoading,
              ),
            ],
          ),
          const SizedBox(height: 16),
          // 第二行
          Row(
            children: [
              _buildTeamStatItem(
                context,
                '已解锁下级',
                contribution?.unlockedLevelDepth.toString(),
                '',
                isLoading,
              ),
              const SizedBox(width: 16),
              _buildTeamStatItem(
                context,
                '是否参与',
                contribution != null ? (contribution.hasAdopted == true ? '是' : '否') : null,
                '',
                isLoading,
              ),
            ],
          ),
        ],
      ),
    );
  }

  Widget _buildTeamStatItem(BuildContext context, String label, String? value, String unit, bool isLoading) {
    final isDark = AppColors.isDark(context);
    return Expanded(
      child: Container(
        padding: const EdgeInsets.all(12),
        decoration: BoxDecoration(
          color: isDark ? AppColors.backgroundOf(context) : const Color(0xFFF3F4F6),
          borderRadius: BorderRadius.circular(12),
        ),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Text(label, style: TextStyle(fontSize: 12, color: AppColors.textSecondaryOf(context))),
            const SizedBox(height: 4),
            isLoading
                ? ShimmerText(
                    placeholder: unit.isNotEmpty ? '-- $unit' : '--',
                    style: const TextStyle(fontSize: 18, fontWeight: FontWeight.bold, color: _orange),
                  )
                : Text.rich(
                    TextSpan(
                      children: [
                        TextSpan(
                          text: '${value ?? '0'} ',
                          style: const TextStyle(fontSize: 18, fontWeight: FontWeight.bold, color: _orange),
                        ),
                        if (unit.isNotEmpty)
                          TextSpan(
                            text: unit,
                            style: TextStyle(fontSize: 12, color: AppColors.textSecondaryOf(context)),
                          ),
                      ],
                    ),
                  ),
          ],
        ),
      ),
    );
  }

  Widget _buildExpirationCard(
    BuildContext context,
    Contribution? contribution,
    bool isLoading,
  ) {
    final isDark = AppColors.isDark(context);
    // 贡献值有效期为2年（730天）
    // 暂时使用固定信息，后续可从后端获取最近过期日期
    const int validityDays = 730;
    final hasContribution = contribution != null &&
        (double.tryParse(contribution.totalContribution) ?? 0) > 0;

    // 如果有贡献值，显示有效期提示
    final String expireDateText = hasContribution
        ? '贡献值自生效日起 $validityDays 天内有效'
        : '暂无贡献值';
    final double progress = hasContribution ? 1.0 : 0.0;
    final bgGrayColor = isDark ? AppColors.backgroundOf(context) : const Color(0xFFF3F4F6);

    return Container(
      padding: const EdgeInsets.all(20),
      decoration: BoxDecoration(
        color: AppColors.cardOf(context),
        borderRadius: BorderRadius.circular(16),
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          // 标题
          Row(
            children: [
              const Icon(Icons.timer_outlined, color: _orange, size: 24),
              const SizedBox(width: 8),
              Text(
                '贡献值失效倒计时',
                style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold, color: AppColors.textPrimaryOf(context)),
              ),
            ],
          ),
          const SizedBox(height: 12),
          // 进度条
          ClipRRect(
            borderRadius: BorderRadius.circular(5),
            child: LinearProgressIndicator(
              value: isLoading ? 1.0 : progress,
              minHeight: 10,
              backgroundColor: bgGrayColor,
              valueColor: AlwaysStoppedAnimation<Color>(
                isLoading ? bgGrayColor : _orange,
              ),
            ),
          ),
          const SizedBox(height: 12),
          // 说明文字
          isLoading
              ? ShimmerText(
                  placeholder: '贡献值有效期信息加载中...',
                  style: TextStyle(fontSize: 12, color: AppColors.textSecondaryOf(context)),
                )
              : Text(
                  expireDateText,
                  style: TextStyle(fontSize: 12, color: AppColors.textSecondaryOf(context)),
                ),
          const SizedBox(height: 4),
          isLoading
              ? const ShimmerText(
                  placeholder: '有效期 --- 天',
                  style: TextStyle(fontSize: 12, color: _orange, fontWeight: FontWeight.w500),
                )
              : const Text(
                  '有效期 $validityDays 天',
                  style: TextStyle(fontSize: 12, color: _orange, fontWeight: FontWeight.w500),
                ),
        ],
      ),
    );
  }
}