import { getLogger } from '@stock-bot/logger';
import { getMongoDBClient, getPostgreSQLClient } from '../../../clients';
import type { JobPayload, SyncResult } from '../../../types/job-payloads';

const logger = getLogger('enhanced-sync-symbols-from-provider');

export async function syncSymbolsFromProvider(payload: JobPayload): Promise<SyncResult> {
  const provider = payload.provider;
  const clearFirst = payload.clearFirst || false;
  
  if (!provider) {
    throw new Error('Provider is required in payload');
  }

  logger.info(`Starting ${provider} symbols sync...`, { clearFirst });

  const result: SyncResult = {
    processed: 0,
    created: 0,
    updated: 0,
    skipped: 0,
    errors: 0,
  };

  try {
    const mongoClient = getMongoDBClient();
    const postgresClient = getPostgreSQLClient();

    // Clear existing data if requested (only symbols and mappings, keep exchanges)
    if (clearFirst) {
      await postgresClient.query('BEGIN');
      await postgresClient.query('DELETE FROM provider_mappings');
      await postgresClient.query('DELETE FROM symbols');
      await postgresClient.query('COMMIT');
      logger.info('Cleared existing symbols and mappings before sync');
    }

    // Start transaction
    await postgresClient.query('BEGIN');

    let symbols: Record<string, unknown>[] = [];

    // Get symbols based on provider
    const db = mongoClient.getDatabase();
    switch (provider.toLowerCase()) {
      case 'qm':
        symbols = await db.collection('qmSymbols').find({}).toArray();
        break;
      case 'eod':
        symbols = await db.collection('eodSymbols').find({}).toArray();
        break;
      case 'ib':
        symbols = await db.collection('ibSymbols').find({}).toArray();
        break;
      default:
        throw new Error(`Unsupported provider: ${provider}`);
    }

    logger.info(`Found ${symbols.length} ${provider} symbols to process`);
    result.processed = symbols.length;

    for (const symbol of symbols) {
      try {
        await processSingleSymbol(symbol, provider, result);
      } catch (error) {
        logger.error('Failed to process symbol', {
          error,
          symbol: symbol.symbol || symbol.code,
          provider,
        });
        result.errors++;
      }
    }

    // Update sync status
    await updateSyncStatus(provider, 'symbols', result.processed, postgresClient);

    await postgresClient.query('COMMIT');

    logger.info(`${provider} symbols sync completed`, result);
    return result;
  } catch (error) {
    const postgresClient = getPostgreSQLClient();
    await postgresClient.query('ROLLBACK');
    logger.error(`${provider} symbols sync failed`, { error });
    throw error;
  }
}

async function processSingleSymbol(symbol: any, provider: string, result: SyncResult): Promise<void> {
  const symbolCode = symbol.symbol || symbol.code;
  const exchangeCode = symbol.exchangeCode || symbol.exchange || symbol.exchange_id;

  if (!symbolCode || !exchangeCode) {
    result.skipped++;
    return;
  }

  // Find active provider exchange mapping
  const providerMapping = await findActiveProviderExchangeMapping(provider, exchangeCode);

  if (!providerMapping) {
    result.skipped++;
    return;
  }

  // Check if symbol exists
  const existingSymbol = await findSymbolByCodeAndExchange(
    symbolCode,
    providerMapping.master_exchange_id
  );

  if (existingSymbol) {
    await updateSymbol(existingSymbol.id, symbol);
    await upsertProviderMapping(existingSymbol.id, provider, symbol);
    result.updated++;
  } else {
    const newSymbolId = await createSymbol(symbol, providerMapping.master_exchange_id);
    await upsertProviderMapping(newSymbolId, provider, symbol);
    result.created++;
  }
}

async function findActiveProviderExchangeMapping(provider: string, providerExchangeCode: string): Promise<any> {
  const postgresClient = getPostgreSQLClient();
  const query = `
    SELECT pem.*, e.code as master_exchange_code 
    FROM provider_exchange_mappings pem
    JOIN exchanges e ON pem.master_exchange_id = e.id
    WHERE pem.provider = $1 AND pem.provider_exchange_code = $2 AND pem.active = true
  `;
  const result = await postgresClient.query(query, [provider, providerExchangeCode]);
  return result.rows[0] || null;
}

async function findSymbolByCodeAndExchange(symbol: string, exchangeId: string): Promise<any> {
  const postgresClient = getPostgreSQLClient();
  const query = 'SELECT * FROM symbols WHERE symbol = $1 AND exchange_id = $2';
  const result = await postgresClient.query(query, [symbol, exchangeId]);
  return result.rows[0] || null;
}

async function createSymbol(symbol: any, exchangeId: string): Promise<string> {
  const postgresClient = getPostgreSQLClient();
  const query = `
    INSERT INTO symbols (symbol, exchange_id, company_name, country, currency)
    VALUES ($1, $2, $3, $4, $5)
    RETURNING id
  `;

  const result = await postgresClient.query(query, [
    symbol.symbol || symbol.code,
    exchangeId,
    symbol.companyName || symbol.name || symbol.company_name,
    symbol.countryCode || symbol.country_code || 'US',
    symbol.currency || 'USD',
  ]);

  return result.rows[0].id;
}

async function updateSymbol(symbolId: string, symbol: any): Promise<void> {
  const postgresClient = getPostgreSQLClient();
  const query = `
    UPDATE symbols 
    SET company_name = COALESCE($2, company_name),
        country = COALESCE($3, country),
        currency = COALESCE($4, currency),
        updated_at = NOW()
    WHERE id = $1
  `;

  await postgresClient.query(query, [
    symbolId,
    symbol.companyName || symbol.name || symbol.company_name,
    symbol.countryCode || symbol.country_code,
    symbol.currency,
  ]);
}

async function upsertProviderMapping(symbolId: string, provider: string, symbol: any): Promise<void> {
  const postgresClient = getPostgreSQLClient();
  const query = `
    INSERT INTO provider_mappings 
    (symbol_id, provider, provider_symbol, provider_exchange, last_seen)
    VALUES ($1, $2, $3, $4, NOW())
    ON CONFLICT (provider, provider_symbol)
    DO UPDATE SET 
      symbol_id = EXCLUDED.symbol_id,
      provider_exchange = EXCLUDED.provider_exchange,
      last_seen = NOW()
  `;

  await postgresClient.query(query, [
    symbolId,
    provider,
    symbol.qmSearchCode || symbol.symbol || symbol.code,
    symbol.exchangeCode || symbol.exchange || symbol.exchange_id,
  ]);
}

async function updateSyncStatus(provider: string, dataType: string, count: number, postgresClient: any): Promise<void> {
  const query = `
    INSERT INTO sync_status (provider, data_type, last_sync_at, last_sync_count, sync_errors)
    VALUES ($1, $2, NOW(), $3, NULL)
    ON CONFLICT (provider, data_type)
    DO UPDATE SET 
      last_sync_at = NOW(),
      last_sync_count = EXCLUDED.last_sync_count,
      sync_errors = NULL,
      updated_at = NOW()
  `;

  await postgresClient.query(query, [provider, dataType, count]);
}