import { constants } from '@cloudbase/utilities'
import { COMPONENT_NAME } from '../constants'
const { ERRORS } = constants

export function parseURL(_url: string) {
  if (document) {
    const a = document.createElement('a')
    a.href = _url
    return a
  }
  return new URL(new Request(_url).url)
}

export function isBuffer(buf: any) {
  return buf instanceof ArrayBuffer || ArrayBuffer.isView(buf)
}

function object2Qs(data) {
  const list = Object.entries(data || {}).reduce((list, [key, value]: [string, string]) => {
    list.push(`${encodeURIComponent(key)}=${encodeURIComponent(value)}`)
    return list
  }, [])
  if (list.length) {
    return list.join('&')
  }
}

export function serializeRequestBody<T>(headers, data: T, method = 'POST'): T | string {
  let res: T | string = data
  const contentTypeKey = 'Content-Type'
  if (typeof data === 'object' && !isBuffer(data)) {
    if (!headers[contentTypeKey] && !headers['content-type']) {
      headers[contentTypeKey] = 'application/json'
    }

    const contentType = headers[contentTypeKey] || headers['content-type']

    if (method === 'GET') {
      try {
        return object2Qs(data) || ''
      } catch (e) {
        throw new Error(JSON.stringify({
          code: ERRORS.INVALID_PARAMS,
          msg: `[${COMPONENT_NAME}.callContainer] invalid data in query method, ${e.message}`,
        }),)
      }
    }

    switch (contentType) {
      case 'application/json': {
        try {
          res = JSON.stringify(data)
        } catch (e) {
          throw new Error(JSON.stringify({
            code: ERRORS.INVALID_PARAMS,
            msg: `[${COMPONENT_NAME}.callContainer] invalid data with content-type: application/json, ${e.message}`,
          }),)
        }
        break
      }
      case 'application/x-www-form-urlencoded': {
        try {
          const qs = object2Qs(data)
          if (qs) {
            res = qs
          }
        } catch (e) {
          throw new Error(JSON.stringify({
            code: ERRORS.INVALID_PARAMS,
            msg: `[${COMPONENT_NAME}.callContainer] invalid data with content-type: application/x-www-form-urlencoded,${e.message}`,
          }),)
        }
        break
      }
    }
  }
  return res
}