import { defineEventHandler, getRouterParam, createError } from 'h3'
import { prisma } from '../../lib/prisma'
import { BaseCrudService } from '../../lib/crud-service'
import { createCrudHandlers } from '../../lib/crud-handler'
import { Prisma } from '@prisma/client'

export default defineEventHandler(async (event) => {
  const table = getRouterParam(event, 'table')?.toLowerCase()
  
  if (!table) {
    throw createError({
      statusCode: 400,
      statusMessage: 'Table name is required',
    })
  }
  
  // 将表名转换为 PascalCase 模型名（首字母大写，复数转单数）
  let modelName = table
  // 简单的复数转单数逻辑（去掉结尾的s）
  if (modelName.endsWith('s')) {
    modelName = modelName.slice(0, -1)
  }
  modelName = modelName.charAt(0).toUpperCase() + modelName.slice(1)
  
  // 验证表名是否存在于 Prisma 模型中
  if (!prisma[modelName as keyof typeof prisma]) {
    throw createError({
      statusCode: 404,
      statusMessage: 'Table not found or not supported',
    })
  }
  
  // 直接实例化 BaseCrudService，传入动态表名
  const service = new BaseCrudService(prisma, modelName as Prisma.ModelName)
  
  // 如果是 posts 表，添加标题验证
  if (table === 'posts') {
    const originalValidateCreate = service['validateCreate']
    service['validateCreate'] = async (data: any) => {
      if (!data.title) {
        const error = new Error('Title is required')
        ;(error as any).statusCode = 400
        throw error
      }
      await originalValidateCreate.call(service, data)
    }
  }
  
  const { create } = createCrudHandlers(service)
  return await create(event)
})