import 'package:flutter/material.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:airhub_app/theme/design_tokens.dart';
import 'package:airhub_app/widgets/animated_gradient_background.dart';
import 'package:airhub_app/widgets/ios_toast.dart';
import 'package:airhub_app/features/user/presentation/controllers/user_controller.dart';
import 'package:image_picker/image_picker.dart';
import 'dart:typed_data';

class ProfileInfoPage extends ConsumerStatefulWidget {
  const ProfileInfoPage({super.key});

  @override
  ConsumerState<ProfileInfoPage> createState() => _ProfileInfoPageState();
}

class _ProfileInfoPageState extends ConsumerState<ProfileInfoPage> {
  String _gender = '';
  String _birthday = '';
  Uint8List? _avatarBytes;
  String? _avatarUrl;
  late final TextEditingController _nicknameController;
  bool _initialized = false;

  @override
  void initState() {
    super.initState();
    _nicknameController = TextEditingController();
  }

  @override
  void dispose() {
    _nicknameController.dispose();
    super.dispose();
  }

  void _initFromUser() {
    if (_initialized) return;
    final userAsync = ref.read(userControllerProvider);
    final user = userAsync.value;
    if (user != null) {
      _nicknameController.text = user.nickname ?? '';
      _gender = user.gender ?? '';
      _birthday = user.birthday ?? '';
      _avatarUrl = user.avatar;
      _initialized = true;
    }
  }

  @override
  Widget build(BuildContext context) {
    final userAsync = ref.watch(userControllerProvider);

    // 首次从用户数据初始化表单
    userAsync.whenData((_) => _initFromUser());

    return Scaffold(
      backgroundColor: Colors.transparent,
      body: Stack(
        children: [
          const AnimatedGradientBackground(),
          Column(
            children: [
              _buildHeader(context),
              Expanded(
                child: SingleChildScrollView(
                  padding: EdgeInsets.only(
                    top: 20,
                    left: AppSpacing.lg,
                    right: AppSpacing.lg,
                    bottom: 40 + MediaQuery.of(context).padding.bottom,
                  ),
                  child: Column(
                    children: [
                      const SizedBox(height: 20),
                      _buildAvatarSection(),
                      const SizedBox(height: 32),
                      _buildFormCard(),
                    ],
                  ),
                ),
              ),
            ],
          ),
        ],
      ),
    );
  }

  Widget _buildHeader(BuildContext context) {
    return Container(
      padding: EdgeInsets.only(
        top: MediaQuery.of(context).padding.top + 20,
        left: AppSpacing.lg,
        right: AppSpacing.lg,
        bottom: AppSpacing.md,
      ),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.spaceBetween,
        children: [
          _buildBackButton(context),
          Text('个人信息', style: AppTextStyles.title),
          _buildSaveButton(),
        ],
      ),
    );
  }

  Widget _buildBackButton(BuildContext context) {
    return GestureDetector(
      onTap: () => Navigator.pop(context),
      child: Container(
        width: 40,
        height: 40,
        decoration: BoxDecoration(
          color: AppColors.iconBtnBg,
          borderRadius: BorderRadius.circular(AppRadius.button),
        ),
        child: const Icon(
          Icons.arrow_back_ios_new,
          color: AppColors.textPrimary,
          size: 18,
        ),
      ),
    );
  }

  Widget _buildSaveButton() {
    return GestureDetector(
      onTap: _saveProfile,
      child: Container(
        padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 10),
        decoration: BoxDecoration(
          gradient: const LinearGradient(
            colors: AppColors.saveBtnGradient,
            begin: Alignment.topLeft,
            end: Alignment.bottomRight,
          ),
          borderRadius: BorderRadius.circular(20),
        ),
        child: const Text(
          '保存',
          style: TextStyle(
            color: Colors.white,
            fontWeight: FontWeight.w600,
            fontSize: 14,
          ),
        ),
      ),
    );
  }

  Future<void> _saveProfile() async {
    // 转换性别为后端格式
    String? genderCode;
    if (_gender == '男') {
      genderCode = 'M';
    } else if (_gender == '女') {
      genderCode = 'F';
    }

    final success = await ref.read(userControllerProvider.notifier).updateProfile(
      nickname: _nicknameController.text.trim(),
      gender: genderCode,
      birthday: _birthday.isNotEmpty ? _birthday : null,
    );

    if (mounted) {
      if (success) {
        AppToast.show(context, '保存成功');
        Navigator.pop(context);
      } else {
        AppToast.show(context, '保存失败，请重试', isError: true);
      }
    }
  }

  Widget _buildAvatarSection() {
    return Stack(
      children: [
        Container(
          width: 100,
          height: 100,
          decoration: const BoxDecoration(
            shape: BoxShape.circle,
            gradient: LinearGradient(
              colors: AppColors.avatarGradient,
              begin: Alignment.topLeft,
              end: Alignment.bottomRight,
            ),
            boxShadow: [
              BoxShadow(
                color: Color(0x338B5E3C),
                blurRadius: 24,
                offset: Offset(0, 8),
              ),
            ],
          ),
          child: ClipOval(
            child: _avatarBytes != null
                ? Image.memory(_avatarBytes!, fit: BoxFit.cover)
                : (_avatarUrl != null && _avatarUrl!.isNotEmpty)
                    ? Image.network(
                        _avatarUrl!,
                        fit: BoxFit.cover,
                        errorBuilder: (ctx, err, stack) =>
                            Image.asset('assets/www/Capybara.png', fit: BoxFit.cover),
                      )
                    : Image.asset(
                        'assets/www/Capybara.png',
                        fit: BoxFit.cover,
                        errorBuilder: (ctx, err, stack) =>
                            const Icon(Icons.person, color: Colors.white, size: 40),
                      ),
          ),
        ),
        Positioned(
          bottom: 0,
          right: 0,
          child: GestureDetector(
            onTap: _pickImage,
            child: Container(
              width: 32,
              height: 32,
              decoration: BoxDecoration(
                gradient: const LinearGradient(
                  colors: AppColors.saveBtnGradient,
                ),
                shape: BoxShape.circle,
                border: Border.all(color: Colors.white, width: 3),
                boxShadow: [
                  BoxShadow(
                    color: Colors.black.withOpacity(0.15),
                    offset: const Offset(0, 2),
                    blurRadius: 8,
                  ),
                ],
              ),
              child: const Icon(
                Icons.camera_alt,
                color: Colors.white,
                size: 14,
              ),
            ),
          ),
        ),
      ],
    );
  }

  Future<void> _pickImage() async {
    try {
      final ImagePicker picker = ImagePicker();
      final XFile? image = await picker.pickImage(source: ImageSource.gallery);

      if (image != null) {
        final bytes = await image.readAsBytes();
        setState(() {
          _avatarBytes = bytes;
        });
        // 上传头像到服务器
        final success = await ref.read(userControllerProvider.notifier).changeAvatar(image.path);
        if (mounted && !success) {
          AppToast.show(context, '头像上传失败', isError: true);
        }
      }
    } catch (e) {
      if (mounted) {
        AppToast.show(context, '选择图片失败', isError: true);
      }
    }
  }

  Widget _buildFormCard() {
    return Container(
      decoration: BoxDecoration(
        color: AppColors.cardSurface,
        borderRadius: BorderRadius.circular(AppRadius.card),
        boxShadow: const [AppShadows.card],
      ),
      child: Column(
        children: [
          _buildInputItem('昵称', _nicknameController),
          _buildSelectionItem(
            '性别',
            _gender.isEmpty ? '未设置' : _gender,
            onTap: _showGenderModal,
          ),
          _buildSelectionItem(
            '生日',
            _birthday.isEmpty ? '未设置' : _birthday,
            showDivider: false,
            onTap: _showBirthdayInput,
          ),
        ],
      ),
    );
  }

  Widget _buildInputItem(String label, TextEditingController controller) {
    return Container(
      padding: const EdgeInsets.symmetric(
        horizontal: AppSpacing.lg,
        vertical: 18,
      ),
      decoration: const BoxDecoration(
        border: Border(bottom: BorderSide(color: AppColors.divider)),
      ),
      child: Row(
        children: [
          SizedBox(
            width: 80,
            child: Text(
              label,
              style: const TextStyle(color: AppColors.formLabel, fontSize: 15),
            ),
          ),
          Expanded(
            child: TextField(
              controller: controller,
              textAlign: TextAlign.right,
              decoration: const InputDecoration.collapsed(
                hintText: '请输入',
                hintStyle: TextStyle(color: AppColors.textHint),
              ),
              style: const TextStyle(
                color: AppColors.textPrimary,
                fontSize: 15,
              ),
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildSelectionItem(
    String label,
    String value, {
    bool showDivider = true,
    VoidCallback? onTap,
  }) {
    return InkWell(
      onTap: onTap,
      child: Container(
        padding: const EdgeInsets.symmetric(
          horizontal: AppSpacing.lg,
          vertical: 18,
        ),
        decoration: showDivider
            ? const BoxDecoration(
                border: Border(bottom: BorderSide(color: AppColors.divider)),
              )
            : null,
        child: Row(
          children: [
            SizedBox(
              width: 80,
              child: Text(
                label,
                style: const TextStyle(
                  color: AppColors.formLabel,
                  fontSize: 15,
                ),
              ),
            ),
            Expanded(
              child: Text(
                value,
                textAlign: TextAlign.right,
                style: const TextStyle(
                  color: AppColors.textPrimary,
                  fontSize: 15,
                ),
              ),
            ),
            const SizedBox(width: 8),
            const Icon(
              Icons.chevron_right,
              color: AppColors.textHint,
              size: 18,
            ),
          ],
        ),
      ),
    );
  }

  void _showGenderModal() {
    showModalBottomSheet(
      context: context,
      backgroundColor: Colors.transparent,
      builder: (context) => Container(
        padding: const EdgeInsets.fromLTRB(20, 24, 20, 20),
        decoration: const BoxDecoration(
          gradient: LinearGradient(
            begin: Alignment.topCenter,
            end: Alignment.bottomCenter,
            colors: [
              Color(0xFFFFFDF9),
              Color(0xFFFFF8F0),
            ],
          ),
          borderRadius: BorderRadius.vertical(top: Radius.circular(24)),
          boxShadow: [
            BoxShadow(
              color: Color(0x148B5E3C),
              blurRadius: 20,
              offset: Offset(0, -4),
            ),
          ],
        ),
        child: SafeArea(
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children: [
              Container(
                width: 36,
                height: 4,
                decoration: BoxDecoration(
                  color: const Color(0xFFE8C9A8),
                  borderRadius: BorderRadius.circular(2),
                ),
              ),
              const SizedBox(height: 20),
              Text('选择性别', style: AppTextStyles.title),
              const SizedBox(height: 24),
              _buildGenderOption('男'),
              const SizedBox(height: 12),
              _buildGenderOption('女'),
              const SizedBox(height: 16),
              GestureDetector(
                onTap: () => Navigator.pop(context),
                child: Container(
                  width: double.infinity,
                  padding: const EdgeInsets.symmetric(vertical: 14),
                  decoration: BoxDecoration(
                    color: const Color(0xFFF5F0EB),
                    borderRadius: BorderRadius.circular(16),
                  ),
                  alignment: Alignment.center,
                  child: const Text(
                    '取消',
                    style: TextStyle(
                      fontSize: 16,
                      fontWeight: FontWeight.w500,
                      color: Color(0xFF6B7280),
                    ),
                  ),
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }

  Widget _buildGenderOption(String label) {
    final isSelected = _gender == label;
    return GestureDetector(
      onTap: () {
        setState(() => _gender = label);
        Navigator.pop(context);
      },
      child: AnimatedContainer(
        duration: const Duration(milliseconds: 200),
        width: double.infinity,
        padding: const EdgeInsets.symmetric(vertical: 16),
        decoration: BoxDecoration(
          color: isSelected
              ? const Color(0xFFFFF5EB)
              : Colors.white.withOpacity(0.8),
          borderRadius: BorderRadius.circular(16),
          border: Border.all(
            color: isSelected
                ? const Color(0xFFECCFA8)
                : const Color(0xFFE5E7EB),
            width: isSelected ? 1.5 : 1,
          ),
          boxShadow: isSelected
              ? [
                  BoxShadow(
                    color: const Color(0xFFECCFA8).withOpacity(0.25),
                    blurRadius: 12,
                    offset: const Offset(0, 4),
                  ),
                ]
              : null,
        ),
        child: Row(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Text(
              label,
              style: TextStyle(
                fontSize: 16,
                fontWeight: FontWeight.w600,
                color: isSelected
                    ? const Color(0xFFB07D5A)
                    : const Color(0xFF374151),
              ),
            ),
          ],
        ),
      ),
    );
  }

  void _showBirthdayInput() {
    DateTime tempDate = DateTime.tryParse(_birthday) ?? DateTime(1994, 12, 9);

    showModalBottomSheet(
      context: context,
      backgroundColor: Colors.transparent,
      builder: (context) => Container(
        height: 340,
        decoration: const BoxDecoration(
          gradient: LinearGradient(
            begin: Alignment.topCenter,
            end: Alignment.bottomCenter,
            colors: [
              Color(0xFFFFFDF9),
              Color(0xFFFFF8F0),
            ],
          ),
          borderRadius: BorderRadius.vertical(top: Radius.circular(24)),
          boxShadow: [
            BoxShadow(
              color: Color(0x148B5E3C),
              blurRadius: 20,
              offset: Offset(0, -4),
            ),
          ],
        ),
        child: Column(
          children: [
            Container(
              padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 16),
              decoration: const BoxDecoration(
                border: Border(
                  bottom: BorderSide(color: Color(0x0D000000)),
                ),
              ),
              child: Row(
                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                children: [
                  GestureDetector(
                    onTap: () => Navigator.pop(context),
                    child: const Text(
                      '取消',
                      style: TextStyle(
                        fontSize: 16,
                        color: Color(0xFF6B7280),
                      ),
                    ),
                  ),
                  Text(
                    '选择生日',
                    style: AppTextStyles.title.copyWith(fontSize: 17),
                  ),
                  GestureDetector(
                    onTap: () {
                      setState(() {
                        _birthday =
                            "${tempDate.year}-${tempDate.month.toString().padLeft(2, '0')}-${tempDate.day.toString().padLeft(2, '0')}";
                      });
                      Navigator.pop(context);
                    },
                    child: Container(
                      padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
                      decoration: BoxDecoration(
                        gradient: const LinearGradient(
                          colors: AppColors.saveBtnGradient,
                        ),
                        borderRadius: BorderRadius.circular(16),
                      ),
                      child: const Text(
                        '确定',
                        style: TextStyle(
                          fontSize: 14,
                          fontWeight: FontWeight.w600,
                          color: Colors.white,
                        ),
                      ),
                    ),
                  ),
                ],
              ),
            ),
            Expanded(
              child: CupertinoTheme(
                data: const CupertinoThemeData(
                  textTheme: CupertinoTextThemeData(
                    dateTimePickerTextStyle: TextStyle(
                      fontSize: 20,
                      color: Color(0xFF374151),
                    ),
                  ),
                ),
                child: CupertinoDatePicker(
                  mode: CupertinoDatePickerMode.date,
                  initialDateTime: tempDate,
                  minimumDate: DateTime(1900),
                  maximumDate: DateTime.now(),
                  onDateTimeChanged: (DateTime date) {
                    tempDate = date;
                  },
                ),
              ),
            ),
          ],
        ),
      ),
    );
  }
}