blog_app/lib/provider/blog.dart

import 'package:blog_app/models/common.dart';
import 'package:flutter/foundation.dart';
import 'package:blog_app/apis/blog.dart';
import 'package:blog_app/models/blog.dart';

class BlogProvider with ChangeNotifier {
  List<Blog> blogList = [];
  List<BlogCategory> categoryList = [];
  Blog currentBlog = Blog(
    id: 0,
    title: '',
    topValue: 0,
    isGreat: false,
    category: '',
    summary: '',
    content: '',
    wordCount: 0,
    readDuration: 0,
    visitCount: 0,
    createTime: '',
    updateTime: '',
  );
  int currentPage = 1;
  final int pageSize = 5;
  bool hasMore = true;
  bool isLoading = false;
  int currentYear = DateTime.now().year;
  String? error;

  late List<ChartData> approvedStats = [];
  late List<ChartData> visitStats = [];
  late List<ChartData> visitRankStats = [];
  late List<ChartData> categoryStats = [];
  late List<ChartData> readRankStats = [];
  late BlogStats overviewStats = BlogStats(
    blogCount: 0,
    categoryCount: 0,
    greatCount: 0,
    visitCount: 0,
    wordCount: 0,
  );

  Future<void> queryBlogByPage({bool isRefresh = true}) async {
    if (isLoading) return;

    try {
      if (currentPage == 1) {
        isLoading = true;
      }

      error = null;
      notifyListeners();

      // 如果是刷新，重置页码
      if (isRefresh) {
        currentPage = 1;
      }

      final result = await queryBlogByPageApi(currentPage, pageSize);

      // 更新数据
      if (isRefresh) {
        blogList = result.records;
      } else {
        blogList.addAll(result.records);
      }

      // 判断是否还有更多数据
      hasMore = result.current < result.pages;
      if (hasMore) {
        currentPage++;
      }
    } catch (e) {
      error = '加载数据失败: $e';
      debugPrint('加载数据失败: $e');
    } finally {
      isLoading = false;
      notifyListeners();
    }
  }

  Future<void> refreshBlogCategory() async {
    if (isLoading) return;

    try {
      isLoading = true;
      error = null;
      categoryList = [];
      notifyListeners();

      final result = await queryBlogCategoryApi();
      categoryList = result;
    } catch (e) {
      error = '加载数据失败: $e';
      debugPrint('加载数据失败: $e');
    } finally {
      isLoading = false;
      notifyListeners();
    }
  }

  Future<void> refreshBlogStats() async {
    if (isLoading) return;

    try {
      isLoading = true;
      error = null;
      notifyListeners();

      final approvedResult = await queryBlogApprovedStatsApi(currentYear);
      final visitResult = await queryBlogVisitStatsApi(currentYear);
      final visitRankResult = await queryBlogVisitRankStatsApi();
      final categoryResult = await queryBlogCategoryStatsApi();
      final readRankResult = await queryBlogReadRankStatsApi();
      final overviewResult = await queryBlogOverviewStatsApi();

      approvedStats = approvedResult;
      visitStats = visitResult;
      visitRankStats = visitRankResult;
      categoryStats = categoryResult;
      readRankStats = readRankResult;
      overviewStats = overviewResult;
    } catch (e) {
      error = '加载数据失败: $e';
      debugPrint('加载数据失败: $e');
    } finally {
      isLoading = false;
      notifyListeners();
    }
  }

  Future<void> refreshBlogByCategory(String category) async {
    if (isLoading) return;

    try {
      isLoading = true;
      error = null;
      blogList = [];
      notifyListeners();

      final result = await queryBlogByConditionApi(category, null, null);
      blogList = result;
    } catch (e) {
      error = '加载数据失败: $e';
      debugPrint('加载数据失败: $e');
    } finally {
      isLoading = false;
      notifyListeners();
    }
  }

  Future<void> refreshBlogByYear() async {
    if (isLoading) return;

    try {
      isLoading = true;
      error = null;
      blogList = [];
      notifyListeners();

      final result = await queryBlogByConditionApi(null, null, currentYear);
      blogList = result;
    } catch (e) {
      error = '加载数据失败: $e';
      debugPrint('加载数据失败: $e');
    } finally {
      isLoading = false;
      notifyListeners();
    }
  }

  Future<void> refreshBlogList() async {
    await queryBlogByPage(isRefresh: true);
  }

  Future<void> queryBlogById(int blogId) async {
    if (isLoading) return;

    try {
      isLoading = true;
      error = null;
      notifyListeners();

      final result = await queryBlogByIdApi(blogId);
      currentBlog = result;
    } catch (e) {
      error = '加载数据失败: $e';
      debugPrint('加载数据失败: $e');
    } finally {
      isLoading = false;
      notifyListeners();
    }
  }

  // 加载更多
  Future<void> loadMoreBlogList() async {
    if (hasMore && !isLoading) {
      await queryBlogByPage(isRefresh: false);
    }
  }

  // 清除错误
  void clearError() {
    error = null;
    notifyListeners();
  }
}