import * as crypto from 'node:crypto';
import { PacketMsg } from '@/napcat-core/packet/message/message';

interface ForwardMsgJson {
  app: string
  config: ForwardMsgJsonConfig,
  desc: string,
  extra: ForwardMsgJsonExtra,
  meta: ForwardMsgJsonMeta,
  prompt: string,
  ver: string,
  view: string
}

interface ForwardMsgJsonConfig {
  autosize: number,
  forward: number,
  round: number,
  type: string,
  width: number
}

interface ForwardMsgJsonExtra {
  filename: string,
  tsum: number,
}

interface ForwardMsgJsonMeta {
  detail: ForwardMsgJsonMetaDetail
}

interface ForwardMsgJsonMetaDetail {
  news: {
    text: string
  }[],
  resid: string,
  source: string,
  summary: string,
  uniseq: string
}

interface ForwardAdaptMsg {
  senderName?: string;
  isGroupMsg?: boolean;
  msg?: ForwardAdaptMsgElement[];
}

interface ForwardAdaptMsgElement {
  preview?: string;
}

export class ForwardMsgBuilder {
  private static build (resId: string, msg: ForwardAdaptMsg[], source?: string, news?: ForwardMsgJsonMetaDetail['news'], summary?: string, prompt?: string): ForwardMsgJson {
    const id = crypto.randomUUID();
    const isGroupMsg = msg.some(m => m.isGroupMsg);
    if (!source) {
      source = msg.length === 0 ? '聊天记录' : (isGroupMsg ? '群聊的聊天记录' : msg.map(m => m.senderName).filter((v, i, a) => a.indexOf(v) === i).slice(0, 4).join('和') + '的聊天记录');
    }
    if (!news) {
      news = msg.length === 0
        ? [{
          text: 'Nya~ This message is send from NapCat.Packet!',
        }]
        : msg.map(m => ({
          text: `${m.senderName}: ${m.msg?.map(msg => msg.preview).join('')}`,
        }));
    }
    if (!summary) {
      summary = `查看${msg.length}条转发消息`;
    }
    if (!prompt) {
      prompt = '[聊天记录]';
    }
    return {
      app: 'com.tencent.multimsg',
      config: {
        autosize: 1,
        forward: 1,
        round: 1,
        type: 'normal',
        width: 300,
      },
      desc: prompt,
      extra: {
        filename: id,
        tsum: msg.length,
      },
      meta: {
        detail: {
          news,
          resid: resId,
          source,
          summary,
          uniseq: id,
        },
      },
      prompt,
      ver: '0.0.0.5',
      view: 'contact',
    };
  }

  static fromResId (resId: string): ForwardMsgJson {
    return this.build(resId, []);
  }

  static fromPacketMsg (resId: string, packetMsg: PacketMsg[], source?: string, news?: ForwardMsgJsonMetaDetail['news'], summary?: string, prompt?: string): ForwardMsgJson {
    return this.build(resId, packetMsg.map(msg => ({
      senderName: msg.senderName,
      isGroupMsg: msg.groupId !== undefined,
      msg: msg.msg.map(m => ({
        preview: m.valid ? m.toPreview() : '[该消息类型暂不支持查看]',
      })),
    })), source, news, summary, prompt);
  }
}