import 'package:flutter/cupertino.dart';
import 'package:flutter/foundation.dart';
import 'package:fluttertoast/fluttertoast.dart';
import 'package:get/get.dart';
import 'package:isekai_wiki/api/mw/watch.dart';
import 'package:isekai_wiki/api/response/page_info.dart';
import 'package:isekai_wiki/api/response/watch.dart';
import 'package:isekai_wiki/models/user.dart';
import 'package:isekai_wiki/utils/dialog.dart';
import 'package:isekai_wiki/utils/error.dart';

class FavoriteListController extends GetxController {
  bool syncRunning = false;

  var favPageIds = RxList<int>();

  void updateFromPageList(List<PageInfo> list) {
    List<int> addList = [];
    List<int> removeList = [];
    for (var pageInfo in list) {
      if (pageInfo.inwatchlist != null) {
        if (pageInfo.inwatchlist!) {
          addList.add(pageInfo.pageid);
        } else {
          removeList.add(pageInfo.pageid);
        }
      }
    }

    var newPageIds = favPageIds.where((pageId) => !removeList.contains(pageId)).toList();
    for (var pageId in addList) {
      if (!newPageIds.contains(pageId)) {
        newPageIds.add(pageId);
      }
    }

    favPageIds.value = newPageIds;
  }

  void updateFromWatchList(List<PageInfo> list) {
    List<int> addList = [];
    for (var pageInfo in list) {
      addList.add(pageInfo.pageid);
    }

    for (var pageId in addList) {
      if (!favPageIds.contains(pageId)) {
        favPageIds.add(pageId);
      }
    }
  }

  bool isFavorite(PageInfo pageInfo) {
    return favPageIds.contains(pageInfo.pageid);
  }

  Future<void> setFavorite(PageInfo pageInfo, bool isFavorite, bool showToast) async {
    syncRunning = true;
    List<WatchActionResponseList> watchRes = [];
    if (isFavorite) {
      // 添加收藏
      try {
        var res = await MWApiWatch.watchPage(pageIds: [pageInfo.pageid]);
        watchRes = res.data;
        // 将页面加入本地收藏列表
        if (!favPageIds.contains(pageInfo.pageid)) {
          favPageIds.add(pageInfo.pageid);
        }
      } catch (err, stack) {
        alert(Get.overlayContext!, ErrorUtils.getErrorMessage(err), title: "错误");
        if (kDebugMode) {
          print("Exception in logout: $err");
          stack.printError();
        }
      }
    } else {
      // 删除收藏
      try {
        var res = await MWApiWatch.unwatchPage(pageIds: [pageInfo.pageid]);
        watchRes = res.data;
      } catch (err, stack) {
        alert(Get.overlayContext!, ErrorUtils.getErrorMessage(err), title: "错误");
        if (kDebugMode) {
          print("Exception in logout: $err");
          stack.printError();
        }
      }
    }
    if (watchRes.isNotEmpty) {
      if (watchRes[0].isWatched) {
        // 将页面加入本地收藏列表
        if (!favPageIds.contains(pageInfo.pageid)) {
          favPageIds.add(pageInfo.pageid);
        }
        if (showToast) {
          Fluttertoast.showToast(
            msg: "已将《${pageInfo.displayTitle}》添加到收藏列表",
            toastLength: Toast.LENGTH_LONG,
            gravity: ToastGravity.BOTTOM,
            timeInSecForIosWeb: 1,
            fontSize: 16.0,
            backgroundColor: CupertinoColors.black.withOpacity(0.8),
            textColor: CupertinoColors.white,
          );
        }
      } else {
        // 将页面从本地收藏列表中移除
        if (favPageIds.contains(pageInfo.pageid)) {
          favPageIds.remove(pageInfo.pageid);
        }
        if (showToast) {
          Fluttertoast.showToast(
            msg: "已将《${pageInfo.displayTitle}》从收藏列表中移除",
            toastLength: Toast.LENGTH_LONG,
            gravity: ToastGravity.BOTTOM,
            timeInSecForIosWeb: 1,
            fontSize: 16.0,
            backgroundColor: CupertinoColors.black.withOpacity(0.8),
            textColor: CupertinoColors.white,
          );
        }
      }
    }
    syncRunning = false;
  }

  /// 判断是否可以更改收藏，并异步提交
  Future<bool> setFavoriteImmediate(PageInfo pageInfo, bool isFavorite) async {
    // 如果未登录，则提示需要登录
    var uc = Get.find<UserController>();
    if (!uc.isLoggedIn) {
      alert(Get.overlayContext!, "使用收藏功能需要登录", title: "提示");
      return !isFavorite;
    }

    if (syncRunning) {
      alert(Get.overlayContext!, "正在同步收藏列表，请稍后再试", title: "提示");
      return !isFavorite;
    }

    setFavorite(pageInfo, isFavorite, true);

    // 立即在UI上显示收藏动画
    return isFavorite;
  }
}