/**
 * {}
 * @author yutent<yutent.io@gmail.com>
 * @date 2023/08/10 10:07:51
 */

const encode = encodeURIComponent
const decode = decodeURIComponent

export function noop() {}

export function readonlyProp(host, name, value) {
  Object.defineProperty(host, name, {
    get() {
      return value
    }
  })
}

/**
 * query 序列化
 */
function serialize(p, obj, callback) {
  var k
  if (Array.isArray(obj)) {
    obj.forEach(function (it, i) {
      k = p ? `${p}[${Array.isArray(it) ? i : ''}]` : i
      if (typeof it === 'object') {
        serialize(k, it, callback)
      } else {
        callback(k, it)
      }
    })
  } else {
    for (let i in obj) {
      k = p ? `${p}[${i}]` : i
      if (typeof obj[i] === 'object') {
        serialize(k, obj[i], callback)
      } else {
        callback(k, obj[i])
      }
    }
  }
}

/**
 * 将url query转回json对象
 */
export function query2object(str = '') {
  let params = new URLSearchParams(str)
  let output = Object.create(null)

  for (let [_k, _v] of params.entries()) {
    let k = decode(_k)
    let v = decode(_v)
    let isArray = 0

    if (/(\w+)\[(\w*?)\]/.test(k)) {
      let k1 = RegExp.$1
      let k2 = RegExp.$2

      k = k1

      if (!k2 || +k2 === +k2) {
        v = [v]
        isArray |= 2
      } else {
        isArray |= 1
        v = { [k2]: v }
      }
    }
    if (output[k]) {
      if (isArray & 2) {
        output[k] = output[k].concat(v)
      } else if (isArray & 1) {
        Object.assign(output[k], v)
      } else {
        if (!Array.isArray(output[v])) {
          output[k] = [output[k]]
        }
        output[k].push(v)
      }
    } else {
      output[k] = v
    }
  }
  return output
}

/**
 * 将json数据转成 url query字符串
 */
export function object2query(obj = {}) {
  if (obj === null) {
    return ''
  }
  if (
    typeof obj === 'string' ||
    typeof obj === 'number' ||
    typeof obj === 'boolean'
  ) {
    return obj
  }
  let output = []
  let query = function (k, v) {
    output.push(k + '=' + encode(v))
  }

  if (typeof obj === 'object') {
    serialize('', obj, query)
  }

  return output.join('&')
}