const { PrismaClient } = require('@prisma/client');
const { ZoneIdAPI } = require('./zoneid-api');

const prisma = new PrismaClient();

const REFRESH_INTERVAL_MS = 3 * 24 * 60 * 60 * 1000;
const REFRESH_CHECK_INTERVAL_MS = 6 * 60 * 60 * 1000;

async function refreshAccountToken(account) {
  console.log(`[TokenScheduler] Refreshing token for account: ${account.email}`);
  
  if (!account.refreshToken) {
    console.log(`[TokenScheduler] Account ${account.email} has no refresh token, skipping`);
    return { success: false, reason: 'no_token' };
  }
  
  const api = new ZoneIdAPI();
  api.setRefreshTokenCookie(account.refreshToken);
  
  try {
    const response = await api.refreshAccessToken();
    
    if (response && response.token) {
      console.log(`[TokenScheduler] Successfully refreshed token for ${account.email}`);
      
      await prisma.account.update({
        where: { id: account.id },
        data: { updatedAt: new Date() }
      });
      
      return { success: true };
    }
    
    return { success: true, note: 'Token validated' };
  } catch (err) {
    console.error(`[TokenScheduler] Failed to refresh token for ${account.email}:`, err.message);
    
    if (err.response?.status === 401 || err.message.includes('expired')) {
      console.log(`[TokenScheduler] Marking account ${account.email} as needing re-authentication`);
      
      await prisma.account.update({
        where: { id: account.id },
        data: { status: 'token_expired' }
      });
      
      return { success: false, reason: 'token_expired' };
    }
    
    return { success: false, reason: err.message };
  }
}

async function refreshAllAccountTokens() {
  console.log('[TokenScheduler] Starting token refresh cycle for all accounts...');
  
  const accounts = await prisma.account.findMany({
    where: {
      status: 'active',
      refreshToken: { not: null }
    }
  });
  
  console.log(`[TokenScheduler] Found ${accounts.length} active accounts with tokens`);
  
  const results = {
    total: accounts.length,
    success: 0,
    failed: 0,
    skipped: 0,
    details: []
  };
  
  for (const account of accounts) {
    try {
      await new Promise(r => setTimeout(r, 2000));
      
      const result = await refreshAccountToken(account);
      
      if (result.success) {
        results.success++;
      } else if (result.reason === 'no_token') {
        results.skipped++;
      } else {
        results.failed++;
      }
      
      results.details.push({
        accountId: account.id,
        email: account.email,
        ...result
      });
    } catch (err) {
      console.error(`[TokenScheduler] Unexpected error for ${account.email}:`, err.message);
      results.failed++;
      results.details.push({
        accountId: account.id,
        email: account.email,
        success: false,
        reason: err.message
      });
    }
  }
  
  console.log(`[TokenScheduler] Refresh cycle complete: ${results.success} success, ${results.failed} failed, ${results.skipped} skipped`);
  
  return results;
}

let schedulerInterval = null;

function startTokenScheduler() {
  if (schedulerInterval) {
    console.log('[TokenScheduler] Scheduler already running');
    return;
  }
  
  console.log(`[TokenScheduler] Starting scheduler (check interval: ${REFRESH_CHECK_INTERVAL_MS / 1000 / 60 / 60} hours)`);
  
  setTimeout(() => {
    refreshAllAccountTokens().catch(err => {
      console.error('[TokenScheduler] Initial refresh failed:', err.message);
    });
  }, 60000);
  
  schedulerInterval = setInterval(() => {
    refreshAllAccountTokens().catch(err => {
      console.error('[TokenScheduler] Scheduled refresh failed:', err.message);
    });
  }, REFRESH_CHECK_INTERVAL_MS);
  
  console.log('[TokenScheduler] Scheduler started successfully');
}

function stopTokenScheduler() {
  if (schedulerInterval) {
    clearInterval(schedulerInterval);
    schedulerInterval = null;
    console.log('[TokenScheduler] Scheduler stopped');
  }
}

module.exports = {
  refreshAccountToken,
  refreshAllAccountTokens,
  startTokenScheduler,
  stopTokenScheduler,
  REFRESH_INTERVAL_MS,
  REFRESH_CHECK_INTERVAL_MS
};