import {isObj} from '../common/utils'

const defaultOptions = {
  type: 'text',
  mask: false,
  message: '',
  show: true,
  zIndex: 1000,
  duration: 2000,
  position: 'middle',
  forbidClick: false,
  loadingType: 'circular',
  selector: '#ht-toast'
}

let queue = []
let currentOptions = {...defaultOptions}

function parseOptions(message) {
  return isObj(message) ? message : {message}
}

function getContext() {
  const pages = getCurrentPages()
  return pages[pages.length - 1]
}

function Toast(toastOptions) {
  const options = {
    ...currentOptions,
    ...parseOptions(toastOptions)
  }

  const context = options.context || getContext()
  const toast = context.selectComponent(options.selector)

  if (!toast) {
    console.warn('未找到 ht-toast 节点，请确认 selector 及 context 是否正确')
    return
  }

  delete options.context
  delete options.selector

  toast.clear = () => {
    toast.setData({show: false})

    if (options.onClose) {
      options.onClose()
    }
  }

  queue.push(toast)
  toast.setData(options)
  clearTimeout(toast.timer)

  if (options.duration > 0) {
    toast.timer = setTimeout(() => {
      toast.clear()
      queue = queue.filter(item => item !== toast)
    }, options.duration)
  }

  return toast
}

const createMethod = (type) => (options) => Toast({
  type,
  ...parseOptions(options)
})

Toast.loading = createMethod('loading')
Toast.success = createMethod('success')
Toast.fail = createMethod('fail')

Toast.clear = () => {
  queue.forEach(toast => {
    toast.clear()
  })
  queue = []
}

Toast.setDefaultOptions = (options) => {
  Object.assign(currentOptions, options)
}

Toast.resetDefaultOptions = () => {
  currentOptions = {...defaultOptions}
}

export default Toast
