import 'package:flutter/material.dart';
import '../../../../app/theme/app_colors.dart';
import '../../../../app/theme/app_typography.dart';
import '../../../../app/theme/app_spacing.dart';
import '../../../../app/i18n/app_localizations.dart';
import '../../../../core/services/coupon_service.dart';
import '../../../coupons/data/models/holdings_summary_model.dart';

/// A7. 个人中心
///
/// 头像、昵称、KYC等级标识、信用积分
/// KYC认证、支付管理、设置、Pro模式
class ProfilePage extends StatefulWidget {
  const ProfilePage({super.key});

  @override
  State<ProfilePage> createState() => _ProfilePageState();
}

class _ProfilePageState extends State<ProfilePage> {
  HoldingsSummaryModel? _holdingsSummary;

  @override
  void initState() {
    super.initState();
    _loadSummary();
  }

  Future<void> _loadSummary() async {
    try {
      final summary = await CouponApiService().getHoldingsSummary();
      if (mounted) setState(() => _holdingsSummary = summary);
    } catch (e) {
      debugPrint('[ProfilePage] loadSummary error: $e');
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: CustomScrollView(
        slivers: [
          // Profile Header
          SliverToBoxAdapter(child: _buildProfileHeader(context)),

          // Quick Stats
          SliverToBoxAdapter(child: _buildQuickStats(context)),

          // Invite Banner
          SliverToBoxAdapter(child: _buildInviteBanner(context)),

          // Menu Sections
          SliverToBoxAdapter(child: _buildMenuSection(context.t('profile.account'), [
            _MenuItem(Icons.verified_user_outlined, context.t('profile.kyc'), '${context.t('kyc.completed')} L1', true,
                onTap: () => Navigator.pushNamed(context, '/kyc')),
            _MenuItem(Icons.credit_card_rounded, context.t('profile.paymentManage'), '', true,
                onTap: () => Navigator.pushNamed(context, '/payment/manage')),
            _MenuItem(Icons.account_balance_wallet_outlined, context.t('wallet.myBalance'), '\$1,234.56', true,
                onTap: () => Navigator.pushNamed(context, '/wallet')),
          ])),

          SliverToBoxAdapter(child: _buildMenuSection(context.t('profile.trade'), [
            _MenuItem(Icons.confirmation_number_outlined, context.t('profile.holdCoupons'),
                '${_holdingsSummary?.count ?? '--'}', true,
                onTap: () => Navigator.pushNamed(context, '/wallet/coupons')),
            _MenuItem(Icons.receipt_long_rounded, context.t('wallet.records'), '', true,
                onTap: () => Navigator.pushNamed(context, '/trading')),
            _MenuItem(Icons.storefront_rounded, context.t('tradingPage.pendingOrders'), context.t('status.onSale'), true,
                onTap: () => Navigator.pushNamed(context, '/trading')),
            _MenuItem(Icons.favorite_border_rounded, context.t('profile.myFavorites'), '', true),
          ])),

          SliverToBoxAdapter(child: _buildMenuSection(context.t('profile.settings'), [
            _MenuItem(Icons.notifications_outlined, context.t('settings.notifications'), '', true),
            _MenuItem(Icons.language_rounded, context.t('settings.language'), context.t('profile.simplifiedChinese'), true),
            _MenuItem(Icons.shield_outlined, context.t('profile.securitySettings'), '', true),
            _MenuItem(Icons.tune_rounded, context.t('profile.advancedSettings'), context.t('profile.proMode'), true,
                onTap: () => Navigator.pushNamed(context, '/pro-mode')),
            _MenuItem(Icons.info_outline_rounded, context.t('profile.aboutGenex'), 'v1.0.0', true),
          ])),

          // Logout
          SliverToBoxAdapter(
            child: Padding(
              padding: const EdgeInsets.fromLTRB(20, 8, 20, 40),
              child: TextButton(
                onPressed: () {
                  Navigator.of(context).pushNamedAndRemoveUntil('/', (_) => false);
                },
                child: Text(context.t('settings.logout'), style: AppTypography.labelMedium.copyWith(
                  color: AppColors.error,
                )),
              ),
            ),
          ),

          const SliverPadding(padding: EdgeInsets.only(bottom: 80)),
        ],
      ),
    );
  }

  Widget _buildProfileHeader(BuildContext context) {
    return Container(
      padding: const EdgeInsets.fromLTRB(20, 60, 20, 24),
      decoration: const BoxDecoration(
        gradient: AppColors.primaryGradient,
      ),
      child: Row(
        children: [
          // Avatar
          Container(
            width: 64,
            height: 64,
            decoration: BoxDecoration(
              color: Colors.white24,
              shape: BoxShape.circle,
              border: Border.all(color: Colors.white38, width: 2),
            ),
            child: const Icon(Icons.person_rounded, color: Colors.white, size: 32),
          ),
          const SizedBox(width: 16),

          Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Row(
                  children: [
                    Text(context.t('merchant.userNickname'), style: AppTypography.h2.copyWith(color: Colors.white)),
                    const SizedBox(width: 8),
                    Container(
                      padding: const EdgeInsets.symmetric(horizontal: 6, vertical: 2),
                      decoration: BoxDecoration(
                        color: Colors.white24,
                        borderRadius: AppSpacing.borderRadiusFull,
                      ),
                      child: Row(
                        mainAxisSize: MainAxisSize.min,
                        children: [
                          const Icon(Icons.shield_rounded, size: 10, color: Colors.white),
                          const SizedBox(width: 2),
                          Text('L1', style: AppTypography.caption.copyWith(
                            color: Colors.white,
                            fontWeight: FontWeight.w600,
                          )),
                        ],
                      ),
                    ),
                  ],
                ),
                const SizedBox(height: 4),
                Text('${context.t('profile.creditScore')}: 750', style: AppTypography.bodySmall.copyWith(
                  color: Colors.white70,
                )),
              ],
            ),
          ),

          // Settings icon
          IconButton(
            icon: const Icon(Icons.settings_outlined, color: Colors.white),
            onPressed: () {
              Navigator.pushNamed(context, '/settings');
            },
          ),
        ],
      ),
    );
  }

  Widget _buildQuickStats(BuildContext context) {
    final holdCount = _holdingsSummary?.count ?? 0;
    final saved = _holdingsSummary?.totalSaved ?? 0;

    final stats = [
      (context.t('profile.holdCoupons'), '$holdCount', () => Navigator.pushNamed(context, '/wallet/coupons')),
      (context.t('profile.trade'), '28', null),
      (context.t('profile.saved'), '\$${saved.toStringAsFixed(0)}', null),
      (context.t('profile.credit'), '750', null),
    ];

    return Container(
      margin: const EdgeInsets.fromLTRB(20, 16, 20, 8),
      padding: const EdgeInsets.symmetric(vertical: 16),
      decoration: BoxDecoration(
        color: AppColors.surface,
        borderRadius: AppSpacing.borderRadiusMd,
        boxShadow: AppSpacing.shadowSm,
      ),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.spaceEvenly,
        children: stats.map((stat) {
          return GestureDetector(
            onTap: stat.$3,
            child: Column(
              children: [
                Text(stat.$2, style: AppTypography.h2.copyWith(color: AppColors.primary)),
                const SizedBox(height: 4),
                Text(stat.$1, style: AppTypography.caption),
              ],
            ),
          );
        }).toList(),
      ),
    );
  }

  Widget _buildInviteBanner(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.fromLTRB(20, 12, 20, 0),
      child: GestureDetector(
        onTap: () => Navigator.pushNamed(context, '/share'),
        child: Container(
          padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 14),
          decoration: BoxDecoration(
            gradient: const LinearGradient(
              begin: Alignment.centerLeft,
              end: Alignment.centerRight,
              colors: [Color(0xFF6C5CE7), Color(0xFF9B8FFF)],
            ),
            borderRadius: AppSpacing.borderRadiusMd,
            boxShadow: [
              BoxShadow(
                color: AppColors.primary.withOpacity(0.25),
                blurRadius: 12,
                offset: const Offset(0, 4),
              ),
            ],
          ),
          child: Row(
            children: [
              Container(
                width: 40,
                height: 40,
                decoration: const BoxDecoration(
                  color: Colors.white24,
                  shape: BoxShape.circle,
                ),
                child: const Icon(Icons.card_giftcard_rounded, color: Colors.white, size: 22),
              ),
              const SizedBox(width: 12),
              Expanded(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Text(
                      context.t('share.inviteBanner'),
                      style: AppTypography.labelMedium.copyWith(
                        color: Colors.white,
                        fontWeight: FontWeight.w700,
                      ),
                    ),
                    const SizedBox(height: 2),
                    Text(
                      context.t('share.inviteBannerSub'),
                      style: AppTypography.caption.copyWith(color: Colors.white70),
                    ),
                  ],
                ),
              ),
              const Icon(Icons.chevron_right_rounded, color: Colors.white70, size: 24),
            ],
          ),
        ),
      ),
    );
  }

  Widget _buildMenuSection(String title, List<_MenuItem> items) {
    return Padding(
      padding: const EdgeInsets.fromLTRB(20, 16, 20, 0),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Text(title, style: AppTypography.labelSmall.copyWith(color: AppColors.textTertiary)),
          const SizedBox(height: 8),
          Container(
            decoration: BoxDecoration(
              color: AppColors.surface,
              borderRadius: AppSpacing.borderRadiusMd,
              border: Border.all(color: AppColors.borderLight),
            ),
            child: Column(
              children: items.asMap().entries.map((entry) {
                final item = entry.value;
                final isLast = entry.key == items.length - 1;
                return Column(
                  children: [
                    ListTile(
                      leading: Icon(item.icon, color: AppColors.textPrimary, size: 22),
                      title: Text(item.title, style: AppTypography.bodyMedium),
                      trailing: Row(
                        mainAxisSize: MainAxisSize.min,
                        children: [
                          if (item.subtitle.isNotEmpty)
                            Text(item.subtitle, style: AppTypography.caption),
                          if (item.hasArrow) ...[
                            const SizedBox(width: 4),
                            const Icon(Icons.chevron_right_rounded,
                                color: AppColors.textTertiary, size: 20),
                          ],
                        ],
                      ),
                      onTap: item.onTap ?? () {},
                    ),
                    if (!isLast)
                      const Divider(indent: 56, height: 1),
                  ],
                );
              }).toList(),
            ),
          ),
        ],
      ),
    );
  }
}

class _MenuItem {
  final IconData icon;
  final String title;
  final String subtitle;
  final bool hasArrow;
  final VoidCallback? onTap;

  const _MenuItem(this.icon, this.title, this.subtitle, this.hasArrow, {this.onTap});
}