import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { Observable, of, catchError, map } from 'rxjs';
import { TreeNode } from '../models/tree-node.model';
import { ConfigService } from './config.service';

@Injectable({
  providedIn: 'root'
})
export class TreeService {
  constructor(
    private http: HttpClient,
    private config: ConfigService
  ) {}

  getTree(): Observable<TreeNode[]> {
    console.log('TreeService.getTree() 调用');
    console.log('config.useMockData:', this.config.useMockData);
    console.log('config.apiBaseUrl:', this.config.apiBaseUrl);
    
    if (this.config.useMockData) {
      console.log('使用模拟树数据');
      const mockTree = this.getMockTree();
      console.log('模拟数据节点数:', mockTree.length);
      // 调试：打印第一个节点的图标信息
      if (mockTree.length > 0 && mockTree[0].children) {
        console.log('[模拟数据]第一个分组节点图标:', mockTree[0].icon);
        console.log('[模拟数据]第一个分组子节点图标:', mockTree[0].children.map(c => ({name: c.name, icon: c.icon})));
      }
      console.log('模拟数据结构:', JSON.stringify(mockTree, null, 2));
      return of(mockTree);
    }
    
    const apiUrl = `${this.config.apiBaseUrl}/projects/tree`;
    console.log('请求树数据:', apiUrl);
    
    return this.http.get<any>(apiUrl).pipe(
      map(response => {
        console.log('树数据响应:', response);
        // 后端返回 {success: true, data: [...]}
        if (response && response.success && response.data) {
          console.log('提取data字段，节点数:', response.data.length);
          // 调试：打印第一个节点的图标信息
          if (response.data.length > 0 && response.data[0].children) {
            console.log('第一个分组节点图标:', response.data[0].icon);
            console.log('第一个分组子节点图标:', response.data[0].children.map((c: any) => ({name: c.name, icon: c.icon})));
          }
          return response.data;
        } else {
          console.warn('响应格式不符合预期，返回空数组');
          return [];
        }
      }),
      catchError((error) => {
        console.error('获取树数据失败:', error);
        console.error('错误详情:', error.status, error.message, error.url);
        // 认证失败或其他错误时返回空数组，不显示模拟数据
        console.warn('API请求失败，回退到模拟数据');
        const mockTree = this.getMockTree();
        console.log('回退模拟数据节点数:', mockTree.length);
        return of(mockTree);
      })
    );
  }

  private getMockTree(): TreeNode[] {
    // 模拟树数据，基于Go后端返回的结构
    return [
      {
        id: 'home',
        name: '首页',
        icon: 'home',
        type: 'group',
        children: [
          {
            id: 'readme',
            name: '说明',
            icon: 'description',
            type: 'page',
            route: '/home/readme'
          }
        ]
      },
      {
        id: 'service-group',
        name: '服务',
        icon: 'settings',
        type: 'group',
        children: [
          {
            id: 'service-register',
            name: '注册服务配置',
            icon: 'app_registration',
            type: 'page',
            route: '/service/register-config'
          },
          {
            id: 'service-management',
            name: '微服务管理',
            icon: 'dns',
            type: 'page',
            route: '/service/management'
          },
          {
            id: 'service-config',
            name: '微服务配置管理',
            icon: 'settings_applications',
            type: 'page',
            route: '/service/config-management'
          },
          {
            id: 'boot-config',
            name: '微服务启动配置管理',
            icon: 'play_circle',
            type: 'page',
            route: '/service/boot-config'
          }
        ]
      },
      {
        id: 'user-group',
        name: '项目',
        icon: 'folder',
        type: 'group',
        children: [
          {
            id: 'project-management',
            name: '项目管理',
            icon: 'folder_open',
            type: 'page',
            route: '/project/list'
          },
          {
            id: 'agent-management',
            name: 'Agent管理',
            icon: 'smart_toy',
            type: 'page',
            route: '/agent/list'
          },
          {
            id: 'skill-management',
            name: 'Skill管理',
            icon: 'build',
            type: 'page',
            route: '/skill/list'
          }
        ]
      },
      {
        id: 'tenant-group',
        name: '租户管理',
        icon: 'apartment',
        type: 'group',
        children: [
          {
            id: 'tenant-management',
            name: '租户管理',
            icon: 'apartment',
            type: 'page',
            route: '/tenant/list'
          },
          {
            id: 'role-management',
            name: '角色管理',
            icon: 'admin_panel_settings',
            type: 'page',
            route: '/role/list'
          },
          {
            id: 'user-management',
            name: '用户管理',
            icon: 'people',
            type: 'page',
            route: '/user/list'
          }
        ]
      }
    ];
  }
}