import { defineEventHandler, EventHandlerRequest } from 'h3';
import { DB } from '~~/server/db/DB';
import { createErrorResponse, createSuccessResponse, IResponse } from '~~/server/utils/response';

export interface IChannel {
  id: number;
  model_id: number;
  parent_id: number;
  name: string;
  type: 'list'|'link',
  url: string;
  outlink: string;
  diyname: string;
}

export default defineEventHandler<EventHandlerRequest, Promise<IResponse<IChannel & {
  childs: IChannel[];
  parents: IChannel[];
}>>>(async (event) => {
  try {
    const id = event.context.params?.id;
    if (!id)
      return createErrorResponse('分类ID不能为空');
    
    const category = await DB.table('pr_cms_channel')
            .where('id', id)
            .where('status', 'normal')
            .first();
    if (!category) 
      return createErrorResponse('分类不存在');

    const childs = await DB.table('pr_cms_channel')
      .where('status', 'normal')
      .where('parent_id', id)
      .orderBy('weigh', 'desc')
      .orderBy('id', 'desc')
      .get();

    const parents : IChannel[] = [];
    let parentId = category.parent_id;
    while (parentId) {
      const parent = await DB.table('pr_cms_channel')
        .where('id', parentId)
        .where('status', 'normal')
        .first();
      if (!parent) 
        break;
      parents.push(parent);
      parentId = parent.parent_id;
    }

    category.parents = parents;
    category.childs = childs;
    return createSuccessResponse(category);
  } catch (error) {
    return createErrorResponse(error);
  }
});