import fs from 'fs-extra'
import path from 'path'
import chalk from 'chalk'
import log from '../utils/log'

export type LegoOptions = {
  root: string,
  port: number,
  namespaceRoot: string,
  customFormMatch: string | string[]
  queryFormMatch: string | string[]
}

function getLegoConfigPath(): string {
  let currentCwd: string = process.cwd()
  let configPath: string = ''

  while (true) {
    const possiblePath: string = path.resolve(currentCwd, 'lego.config.js')

    if (fs.pathExistsSync(possiblePath)) {
      configPath = possiblePath
      break;
    }

    if (currentCwd === path.resolve(currentCwd, '..')) {
      break;
    }

    currentCwd = path.resolve(currentCwd, '..')
  }

  return configPath
}

export function getLegoConfig(): LegoOptions {
  const configPath = getLegoConfigPath()

  const defaultOptions = {
    root: configPath ? path.dirname(configPath) : process.cwd(),
    namespaceRoot: path.resolve(configPath ? path.dirname(configPath) : process.cwd(), '.lego_amespace'),
    customFormMatch: [
      '**/*.lego.js'
    ],
    queryFormMatch: [
      '**/*lego'
    ],
    port: 3000
  }

  if (!configPath) {
    log.warn('没有找到lego.config.js配置文件, 可使用`lego init`初始化一个配置文件')
    log.info(`将使用默认配置:`)
    console.log(chalk.cyan(JSON.stringify(defaultOptions, null, 2)))
  }

  let userOptions: LegoOptions = configPath ? require(configPath) : {}
  userOptions = Object.assign(defaultOptions, userOptions)

  fs.ensureDirSync(userOptions.namespaceRoot)

  return userOptions
}