import { Pipe, PipeTransform } from '@angular/core';

import { ChatMessage } from '../store/entities';

function translate(message: ChatMessage) {
 
    if (!message.t) {
        return message.msg;
    }

    const msg = message.msg;
    const user = message.u.username;

    switch (message.t) {
        case 'r': return `Room name chaged to: ${msg} by ${user}`;
        case 'au': return `User ${msg} added by ${user}`;
        case 'ru': return `用户 <a class="mention-link" href="javascript:;">${msg}</a> 被<a class="mention-link" href="javascript:;">${user}</a>移除`;
        case 'ul': return `用户 <a class="mention-link" href="javascript:;">${msg}</a>离开了频道`;
        case 'uj': return `用户 <a class="mention-link" href="javascript:;">${msg}</a> 加入了频道`;
        case 'wm': return `欢迎 <a class="mention-link" href="javascript:;">${user}</a>`;
        case 'rm': return `<a class="mention-link" href="javascript:;">${user}</a>删除了消息！`;
        case 'room-archived': return `This room has been archived by ${user}`;
        case 'room-unarchived': return `This room has been unarchived by ${user}`;
        case 'room_changed_privacy': return `${user} 将房间类型修改为：${msg}`;
    }
}

@Pipe({
    name: 'translateMessage'
})
export class TranslateMessagePipe implements PipeTransform {
    public transform(message: ChatMessage): string {
        return translate(message);
    }
}