// todo_api.dart (新增 Create 功能)

import './todo_model.dart';
import '../services/generic_api_service.dart';
import 'package:intl/intl.dart';

class TodoApiService {
  final GenericApiService _apiService = GenericApiService();
  final String currentUserId;

  TodoApiService({this.currentUserId = 'admin'});

  // 原始的查詢功能...
  /// 獲取指定日期的任務清單
  Future<List<Todo>> fetchTodos({DateTime? selectedDate}) async {
    // 預設查詢今天的資料
    DateTime dateToQuery = selectedDate ?? DateTime.now();
    String formattedDate = DateFormat('yyyy-MM-dd').format(dateToQuery);

    // 構建 queryFilter：過濾特定的 end_date 並根據 id 排序
    // 格式範例: 1^100^id^*^^end_date^2024-05-01
    String queryFilter = "1^100^id^*^^end_date^$formattedDate";

    return await _apiService.fetchList<Todo>(
      tableName: "eip_todolist",
      pk: "id",
      queryFilter: queryFilter,
      fromJson: (json) => Todo.fromJson(json),
    );
  }

  // 新增：提交任務至資料庫
  Future<bool> createTodo(Todo todo) async {
    final Map<String, dynamic> data = {
      "todolist_class": todo.className,
      "task_name": todo.taskName,
      "task_desc": todo.description,
      "issue_priority": todo.priority,
      "pbi_status": todo.status ?? 'WIP', // 預設為進行中
      "end_date": todo.endDate != null ? DateFormat('yyyy-MM-dd HH:mm:ss').format(todo.endDate!) : null,
      "create_user": currentUserId,
      "create_date": DateFormat('yyyy-MM-dd HH:mm:ss').format(DateTime.now()),
    };

    try {
      // 根據 Generic API 規範，使用 action: "C" 進行新增
      await _apiService.fetchList<dynamic>(
        tableName: "eip_todolist",
        pk: "id",
        queryFilter: "",
        action: "C",
        data: data,
        fromJson: (json) => json,
      );
      return true;
    } catch (e) {
      print("Create Todo Error: $e");
      return false;
    }
  }

  /// 更新任務狀態為已完成
  Future<bool> updateTodoStatus(int id, String status) async {
    final Map<String, dynamic> data = {
      "id": id,                  // 必填 PK
      "pbi_status": status,      // 更新狀態為 'DONE'
      "modify_user": currentUserId,
      "modify_date": DateFormat('yyyy-MM-dd HH:mm:ss').format(DateTime.now()),
    };

    try {
      // 使用 Action "U" 代表 Update
      await _apiService.fetchList<dynamic>(
        tableName: "eip_todolist",
        pk: "id",
        queryFilter: "",
        action: "U",
        data: data,
        fromJson: (json) => json,
      );
      return true;
    } catch (e) {
      print("Update Todo Status Error: $e");
      return false;
    }
  }
}