import Router, {RouterContext} from 'koa-router'
import fs from 'fs-extra'
import path from 'path'
import log from '../utils/log'
import exportJson from './utils/exportJson';

const queryConfigRouter = new Router()

const query_template_path = path.resolve(__dirname, './template/query-lego')

export function createQueryConfig(configPath: string) {
  if (fs.existsSync(configPath)) {
    log.error(`配置文件${configPath}已存在`)
    return
  }

  fs.copySync(query_template_path, configPath)
}

async function getConfigHandler(ctx: RouterContext, next: any) {
  let configPath = ctx.request.query.path
  if (typeof configPath !== 'string' || !configPath) {
    throw new Error('path is required')
  }

  const absolutePath = path.resolve(ctx.legoOption.root, configPath)

  delete require.cache[absolutePath]

  ctx.body = ctx.ok({
    form: require(absolutePath),
    path: absolutePath
  })

  next()
}

async function updateConfigHandler(ctx: RouterContext, next: any) {
  const body = ctx.request.body
  const configPath: string = body.path
  const form = body.form
  const absolutePath: string = path.resolve(ctx.legoOption.root, configPath)

  ;['table', 'panel'].forEach((type: string) => {
    fs.writeFileSync(
      path.resolve(absolutePath, `${type}.lego.js`),
      exportJson(form[type])
    )
  })

  ctx.body = ctx.ok()

  next()
}

async function createConfigHandler(ctx: RouterContext, next: any) {
  const formConfigPath: string = ctx.request.body.path
  const absolutePath = path.resolve(ctx.legoOption.root, formConfigPath)

  createQueryConfig(absolutePath)

  next()
}

queryConfigRouter
  .post('/getConfig', getConfigHandler)
  .post('/updateConfig', updateConfigHandler)
  .post('/createConfig', createConfigHandler)

export default queryConfigRouter