import { createLogger } from '../../utils/logger';
import { supabase } from '../../db/supabase';
import { AuthService } from './auth';
import { Telegraf } from 'telegraf';

const logger = createLogger('PaymentVerificationService');

export class PaymentVerificationService {
  private static instance: PaymentVerificationService;
  private bot: Telegraf;

  private constructor() {}

  public static getInstance(): PaymentVerificationService {
    if (!PaymentVerificationService.instance) {
      PaymentVerificationService.instance = new PaymentVerificationService();
    }
    return PaymentVerificationService.instance;
  }

  public setBot(bot: Telegraf) {
    this.bot = bot;
  }

  async verifyAndUpdatePayment(paymentId: string, status: 'COMPLETED' | 'FAILED') {
    try {
      // Get payment details
      const { data: payment, error: paymentError } = await supabase
        .from('payments')
        .select('*, users_bot_telegram!inner(telegram_id, balance)')
        .eq('id', paymentId)
        .single();

      if (paymentError) throw paymentError;
      if (!payment) throw new Error('Payment not found');

      // Update payment status
      const { error: updateError } = await supabase
        .from('payments')
        .update({
          status: status,
          completed_at: status === 'COMPLETED' ? new Date().toISOString() : null
        })
        .eq('id', paymentId);

      if (updateError) throw updateError;

      if (status === 'COMPLETED') {
        // Update user balance
        const { error: balanceError } = await supabase
          .from('users_bot_telegram')
          .update({
            balance: payment.users_bot_telegram.balance + payment.amount
          })
          .eq('id', payment.user_id);

        if (balanceError) throw balanceError;

        // Notify user
        await this.notifyUser(payment.users_bot_telegram.telegram_id, payment.amount);
      }

      return true;
    } catch (error) {
      logger.error('Error verifying payment:', error);
      throw error;
    }
  }

  private async notifyUser(telegramId: number, amount: number) {
    try {
      await this.bot.telegram.sendMessage(
        telegramId,
        `✅ <b>تم إتمام عملية الدفع بنجاح!</b>\n\n` +
        `تم إضافة ${amount}$ إلى رصيدك.\n` +
        `يمكنك الآن استخدام الخدمات المتاحة.`,
        { parse_mode: 'HTML' }
      );
    } catch (error) {
      logger.error('Error notifying user:', error);
    }
  }
}