import Notification from '../vc-notification'
import Icon from '../icon'

// export type NotificationPlacement = 'topLeft' | 'topRight' | 'bottomLeft' | 'bottomRight';

// export type IconType = 'success' | 'info' | 'error' | 'warning';

const notificationInstance = {}
let defaultDuration = 4.5
let defaultTop = '24px'
let defaultBottom = '24px'
let defaultPlacement = 'topRight'
let defaultGetContainer = () => document.body

// export interface ConfigProps {
//   top?: number;
//   bottom?: number;
//   duration?: number;
//   placement?: NotificationPlacement;
//   getContainer?: () => HTMLElement;
// }
function setNotificationConfig (options) {
  const { duration, placement, bottom, top, getContainer } = options
  if (duration !== undefined) {
    defaultDuration = duration
  }
  if (placement !== undefined) {
    defaultPlacement = placement
  }
  if (bottom !== undefined) {
    defaultBottom = typeof bottom === 'number' ? `${bottom}px` : bottom
  }
  if (top !== undefined) {
    defaultTop = typeof top === 'number' ? `${top}px` : top
  }
  if (getContainer !== undefined) {
    defaultGetContainer = getContainer
  }
}

function getPlacementStyle (placement) {
  let style
  switch (placement) {
    case 'topLeft':
      style = {
        left: 0,
        top: defaultTop,
        bottom: 'auto',
      }
      break
    case 'topRight':
      style = {
        right: 0,
        top: defaultTop,
        bottom: 'auto',
      }
      break
    case 'bottomLeft':
      style = {
        left: 0,
        top: 'auto',
        bottom: defaultBottom,
      }
      break
    default:
      style = {
        right: 0,
        top: 'auto',
        bottom: defaultBottom,
      }
      break
  }
  return style
}

function getNotificationInstance (prefixCls, placement, callback) {
  const cacheKey = `${prefixCls}-${placement}`
  if (notificationInstance[cacheKey]) {
    callback(notificationInstance[cacheKey])
    return
  }
  Notification.newInstance({
    prefixCls,
    class: `${prefixCls}-${placement}`,
    style: getPlacementStyle(placement),
    getContainer: defaultGetContainer,
    closeIcon: (h) => <Icon class={`${prefixCls}-close-icon`} type={'close'}/>,
  }, (notification) => {
    notificationInstance[cacheKey] = notification
    callback(notification)
  })
}

const typeToIcon = {
  success: 'check-circle-o',
  info: 'info-circle-o',
  error: 'close-circle-o',
  warning: 'exclamation-circle-o',
}

// export interface ArgsProps {
//   message: React.ReactNode;
//   description: React.ReactNode;
//   btn?: React.ReactNode;
//   key?: string;
//   onClose?: () => void;
//   duration?: number | null;
//   icon?: React.ReactNode;
//   placement?: NotificationPlacement;
//   style?: React.CSSProperties;
//   prefixCls?: string;
//   className?: string;
//   readonly type?: IconType;
// }
function notice (args) {
  const { icon, type, description, placement, message, btn } = args
  const outerPrefixCls = args.prefixCls || 'ant-notification'
  const prefixCls = `${outerPrefixCls}-notice`
  const duration = args.duration === undefined ? defaultDuration : args.duration

  let iconNode = null
  if (icon) {
    iconNode = (h) => (
      <span class={`${prefixCls}-icon`}>
        {typeof icon === 'function' ? icon(h) : icon}
      </span>
    )
  } else if (type) {
    const iconType = typeToIcon[type]
    iconNode = (h) => (
      <Icon
        class={`${prefixCls}-icon ${prefixCls}-icon-${type}`}
        type={iconType}
      />
    )
  }

  getNotificationInstance(outerPrefixCls, placement || defaultPlacement, (notification) => {
    notification.notice({
      content: (h) => (
        <div class={iconNode ? `${prefixCls}-with-icon` : ''}>
          {iconNode && iconNode(h)}
          <div class={`${prefixCls}-message`}>
            {(!description && iconNode)
              ? <span class={`${prefixCls}-message-single-line-auto-margin`} />
              : null}
            {typeof message === 'function' ? message(h) : message}
          </div>
          <div class={`${prefixCls}-description`}>
            {typeof description === 'function' ? description(h) : description}
          </div>
          {btn ? <span class={`${prefixCls}-btn`}>
            {typeof btn === 'function' ? btn(h) : btn}
          </span> : null}
        </div>
      ),
      duration,
      closable: true,
      onClose: args.onClose,
      key: args.key,
      style: args.style || {},
      class: args.class,
    })
  })
}

const api = {
  open: notice,
  close (key) {
    Object.keys(notificationInstance)
      .forEach(cacheKey => notificationInstance[cacheKey].removeNotice(key))
  },
  config: setNotificationConfig,
  destroy () {
    Object.keys(notificationInstance).forEach(cacheKey => {
      notificationInstance[cacheKey].destroy()
      delete notificationInstance[cacheKey]
    })
  },
};

['success', 'info', 'warning', 'error'].forEach((type) => {
  api[type] = (args) => api.open({
    ...args,
    type,
  })
})

api.warn = api.warning

// export interface NotificationApi {
//   success(args: ArgsProps): void;
//   error(args: ArgsProps): void;
//   info(args: ArgsProps): void;
//   warn(args: ArgsProps): void;
//   warning(args: ArgsProps): void;
//   open(args: ArgsProps): void;
//   close(key: string): void;
//   config(options: ConfigProps): void;
//   destroy(): void;
// }
export default api