import { Injectable, NotFoundException } from '@nestjs/common';
import { ConfigService } from '@nestjs/config';
import {
  Action,
  Command, Ctx, Start, Update,
} from 'nestjs-telegraf';
import { Context, Telegraf } from 'telegraf';

import { PrismaService } from '@/src/core/prisma/prisma.service';
import { BUTTONS } from '@/src/module/libs/telegram/telegram.button';
import { MESSAGES } from '@/src/module/libs/telegram/telegram.message';
import { SessionInfo } from '@/src/shared/types/session-metadata.types';
import { SponsorshipPlan, TokenType, User } from '@prisma/generated';

import { ProcessEnv } from '../../../shared/types/env';

@Update()
@Injectable()
export class TelegramService extends Telegraf {
  private readonly _token: string;

  constructor(
    private readonly prismaService: PrismaService,
    private readonly configService: ConfigService<ProcessEnv>,
  ) {
    super(configService.getOrThrow('TELEGRAM_BOT_TOKEN'));
    this._token = configService.getOrThrow('TELEGRAM_BOT_TOKEN');
  }

  @Start()
  public async onStart(@Ctx() ctx: Context) {
    const chatId = ctx.chat?.id.toString();
    // @ts-ignore
    const token = ctx.message.text.split(' ')[1] as string;

    if (token) {
      const authToken = await this.prismaService.token.findUnique({
        where: {
          token,
          type: TokenType.TELEGRAM_AUTH,
        },
      });

      if (!authToken?.userId) {
        await ctx.reply('Токен не найден');

        return;
      }

      const hasExpired = new Date(authToken.expiresIn) < new Date();
      if (hasExpired) {
        await ctx.reply(MESSAGES.invalidToken);

        return;
      }

      await this.connectTelegram(authToken.userId, chatId!);
      await this.prismaService.token.delete({
        where: { id: authToken.id },
      });

      await ctx.replyWithHTML(MESSAGES.authSuccess, BUTTONS.authSuccess);

      return;
    }

    const user = await this.findUserByChatId(chatId!);
    if (user) {
      await this.onMe(ctx);

      return;
    }
    await ctx.replyWithHTML(MESSAGES.welcome, BUTTONS.profile);
  }

  @Command('me')
  @Action('me')
  public async onMe(@Ctx() ctx: Context) {
    const chatId = ctx.chat?.id.toString();
    if (typeof chatId === 'undefined') {
      throw new NotFoundException('Пользователь не найден');
    }

    const user = await this.findUserByChatId(chatId);
    if (!user) {
      throw new NotFoundException('Пользователь не найден');
    }

    const followersCount = await this.prismaService.follow.count({
      where: { followingId: user.id },
    });

    await ctx.replyWithHTML(MESSAGES.profile(user, followersCount), BUTTONS.profile);
  }

  @Command('follows')
  @Action('follows')
  public async onFollow(@Ctx() ctx: Context) {
    const chatId = ctx.chat?.id;
    if (typeof chatId === 'undefined') {
      throw new NotFoundException('Пользователь не найден');
    }

    const user = await this.findUserByChatId(chatId.toString());
    if (!user) {
      throw new NotFoundException('Пользователь не найден');
    }

    const follows = await this.prismaService.follow.findMany({
      where: { followerId: user.id },
      include: { following: true },
    });

    if (follows.length > 0) {
      const followList = follows.map((follow) => MESSAGES.follows(follow.following)).join('\n');
      const message = `<b>Каналы, на которые Вы подписаны</b>\n\n${followList}`;
      await ctx.replyWithHTML(message);

      return;
    }

    await ctx.replyWithHTML('❌ <b>У Вас нет подписок</b>');
  }

  public async sendPasswordResetToken(chatId: string, token: string, metadata: SessionInfo) {
    await this.telegram.sendMessage(chatId, MESSAGES.resetPassword(token, metadata), { parse_mode: 'HTML' });
  }

  public async sendDeactivateToken(chatId: string, token: string, metadata: SessionInfo) {
    await this.telegram.sendMessage(chatId, MESSAGES.deactivate(token, metadata), { parse_mode: 'HTML' });
  }

  public async sendAccountDeletionToken(chatId: string) {
    await this.telegram.sendMessage(chatId, MESSAGES.accountDeleted, { parse_mode: 'HTML' });
  }

  public async sendStreamStart(chatId: string, channel: User) {
    await this.telegram.sendMessage(chatId, MESSAGES.streamStart(channel), { parse_mode: 'HTML' });
  }

  public async sendNewSponsorship(chatId: string, plan: SponsorshipPlan, sponsor: User) {
    await this.telegram.sendMessage(chatId, MESSAGES.newSponsorship(plan, sponsor), { parse_mode: 'HTML' });
  }

  public async sendNewFollowing(chatId: string, follower: User) {
    const user = await this.findUserByChatId(chatId);
    if (!user) {
      throw new NotFoundException('Пользователь не найден');
    }
    await this.telegram.sendMessage(chatId, MESSAGES.newFollowing(follower, user.followings.length), { parse_mode: 'HTML' });
  }

  public async sendEnableTwoFactor(chatId: string) {
    return this.telegram.sendMessage(chatId, MESSAGES.enableTwoFactor, { parse_mode: 'HTML' });
  }

  public async sendVerifyChannel(chatId: string) {
    return this.telegram.sendMessage(chatId, MESSAGES.verifyChannel, { parse_mode: 'HTML' });
  }

  private async connectTelegram(userId: string, chatId: string) {
    return this.prismaService.user.update({
      where: { id: userId },
      data: { telegramId: chatId },
    });
  }

  private async findUserByChatId(chatId: string) {
    return this.prismaService.user.findUnique({
      where: { telegramId: chatId },
      include: {
        followings: true,
        followers: true,
      },
    });
  }
}