import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import '../providers/app_provider.dart';
import '../models/data_models.dart';
import '../utils/toast_util.dart';
import 'book_review_form_page.dart';

/// 书籍书评列表页面
class BookReviewsPage extends StatefulWidget {
  final Book book;

  const BookReviewsPage({super.key, required this.book});

  @override
  State<BookReviewsPage> createState() => _BookReviewsPageState();
}

class _BookReviewsPageState extends State<BookReviewsPage> {
  List<BookReview> _reviews = [];
  bool _isLoading = true;

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

  Future<void> _loadReviews() async {
    setState(() => _isLoading = true);
    try {
      final reviews = await context.read<AppProvider>().getBookReviews(widget.book.id);
      setState(() {
        _reviews = reviews;
        _isLoading = false;
      });
    } catch (e) {
      setState(() => _isLoading = false);
      ToastUtil.show(context, '加载失败: $e');
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.white,
      appBar: AppBar(
        title: const Text('书评'),
        actions: [
          IconButton(
            icon: const Icon(Icons.add),
            onPressed: () => _navigateToAddReview(),
          ),
          const SizedBox(width: 8),
        ],
      ),
      body: _isLoading
          ? const Center(child: CircularProgressIndicator())
          : _reviews.isEmpty
              ? _buildEmptyState()
              : _buildReviewList(),
    );
  }

  Widget _buildEmptyState() {
    return Center(
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          const Icon(
            Icons.rate_review_outlined,
            size: 64,
            color: Color(0xFFCCCCCC),
          ),
          const SizedBox(height: 16),
          const Text(
            '暂无书评',
            style: TextStyle(
              fontSize: 16,
              color: Color(0xFF999999),
            ),
          ),
          const SizedBox(height: 24),
          OutlinedButton(
            onPressed: () => _navigateToAddReview(),
            style: OutlinedButton.styleFrom(
              foregroundColor: const Color(0xFF1A1A1A),
              side: const BorderSide(color: Color(0xFF1A1A1A)),
              shape: const RoundedRectangleBorder(borderRadius: BorderRadius.zero),
            ),
            child: const Text('写书评'),
          ),
        ],
      ),
    );
  }

  Widget _buildReviewList() {
    return ListView.builder(
      padding: const EdgeInsets.all(16),
      itemCount: _reviews.length,
      itemBuilder: (context, index) {
        final review = _reviews[index];
        return _buildReviewItem(review);
      },
    );
  }

  Widget _buildReviewItem(BookReview review) {
    return Container(
      margin: const EdgeInsets.only(bottom: 16),
      padding: const EdgeInsets.all(16),
      decoration: BoxDecoration(
        border: Border.all(color: const Color(0xFFE5E5E5)),
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          // 头部：类型标签 + 操作按钮
          Row(
            children: [
              Container(
                padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 2),
                decoration: BoxDecoration(
                  color: review.reviewType == 1
                      ? const Color(0xFFF5F5F5)
                      : const Color(0xFF1A1A1A),
                ),
                child: Text(
                  review.typeText,
                  style: TextStyle(
                    fontSize: 11,
                    color: review.reviewType == 1
                        ? const Color(0xFF666666)
                        : Colors.white,
                  ),
                ),
              ),
              const Spacer(),
              // 编辑按钮
              GestureDetector(
                onTap: () => _navigateToEditReview(review),
                child: const Icon(
                  Icons.edit_outlined,
                  size: 18,
                  color: Color(0xFF999999),
                ),
              ),
              const SizedBox(width: 16),
              // 删除按钮
              GestureDetector(
                onTap: () => _showDeleteDialog(review),
                child: const Icon(
                  Icons.delete_outline,
                  size: 18,
                  color: Colors.red,
                ),
              ),
            ],
          ),

          const SizedBox(height: 12),

          // 评论内容
          Text(
            review.content,
            maxLines: review.reviewType == 1 ? 3 : 5,
            overflow: TextOverflow.ellipsis,
            style: const TextStyle(
              fontSize: 15,
              color: Color(0xFF1A1A1A),
              height: 1.6,
            ),
          ),

          const SizedBox(height: 12),

          // 底部信息
          Row(
            children: [
              if (review.reviewer.isNotEmpty) ...[
                Text(
                  review.reviewer,
                  style: const TextStyle(
                    fontSize: 13,
                    color: Color(0xFF666666),
                  ),
                ),
                const SizedBox(width: 8),
              ],
              if (review.source.isNotEmpty) ...[
                Text(
                  '来源：${review.source}',
                  style: const TextStyle(
                    fontSize: 12,
                    color: Color(0xFF999999),
                  ),
                ),
                const SizedBox(width: 8),
              ],
              const Spacer(),
              Text(
                _formatDate(review.createdAt),
                style: const TextStyle(
                  fontSize: 12,
                  color: Color(0xFF999999),
                ),
              ),
            ],
          ),
        ],
      ),
    );
  }

  String _formatDate(DateTime date) {
    return '${date.year}.${date.month.toString().padLeft(2, '0')}.${date.day.toString().padLeft(2, '0')}';
  }

  void _navigateToAddReview() {
    Navigator.push(
      context,
      MaterialPageRoute(
        builder: (context) => BookReviewFormPage(bookId: widget.book.id),
      ),
    ).then((_) => _loadReviews());
  }

  void _navigateToEditReview(BookReview review) {
    Navigator.push(
      context,
      MaterialPageRoute(
        builder: (context) => BookReviewFormPage(
          bookId: widget.book.id,
          review: review,
        ),
      ),
    ).then((_) => _loadReviews());
  }

  void _showDeleteDialog(BookReview review) {
    showDialog(
      context: context,
      builder: (context) => AlertDialog(
        backgroundColor: Colors.white,
        elevation: 0,
        shape: const RoundedRectangleBorder(borderRadius: BorderRadius.zero),
        title: const Text('确认删除'),
        content: const Text('确定要删除这条书评吗？'),
        actions: [
          TextButton(
            onPressed: () => Navigator.pop(context),
            child: const Text('取消', style: TextStyle(color: Color(0xFF666666))),
          ),
          TextButton(
            onPressed: () async {
              await context.read<AppProvider>().removeBookReview(review.id);
              Navigator.pop(context);
              _loadReviews();
              ToastUtil.show(context, '已删除');
            },
            child: const Text('删除', style: TextStyle(color: Colors.red)),
          ),
        ],
      ),
    );
  }
}