/**
 * Cleanup Dealer Claims Script
 * Removes all dealer claim related data for a fresh start
 * 
 * Usage: npm run cleanup:dealer-claims
 * 
 * WARNING: This will permanently delete all CLAIM_MANAGEMENT requests and related data!
 */

import { sequelize } from '../config/database';
import { QueryTypes } from 'sequelize';
import logger from '../utils/logger';

async function cleanupDealerClaims(): Promise<void> {
  const transaction = await sequelize.transaction();
  
  try {
    logger.info('[Cleanup] Starting dealer claim cleanup...');
    
    // Step 1: Find all CLAIM_MANAGEMENT request IDs
    logger.info('[Cleanup] Finding all CLAIM_MANAGEMENT requests...');
    const claimRequests = await sequelize.query<{ request_id: string }>(
      `SELECT request_id FROM workflow_requests WHERE workflow_type = 'CLAIM_MANAGEMENT'`,
      { type: QueryTypes.SELECT, transaction }
    );
    
    const requestIds = claimRequests.map(r => r.request_id);
    const count = requestIds.length;
    
    if (count === 0) {
      logger.info('[Cleanup] No CLAIM_MANAGEMENT requests found. Nothing to clean up.');
      await transaction.commit();
      return;
    }
    
    logger.info(`[Cleanup] Found ${count} CLAIM_MANAGEMENT request(s) to delete`);
    
    // Step 2: Delete in order (respecting foreign key constraints)
    // Start with child tables, then parent tables
    
    // Convert UUID array to PostgreSQL array format
    const requestIdsArray = `{${requestIds.map(id => `'${id}'`).join(',')}}`;
    
    // Delete from claim_budget_tracking (new table)
    logger.info('[Cleanup] Deleting from claim_budget_tracking...');
    await sequelize.query(
      `DELETE FROM claim_budget_tracking WHERE request_id = ANY(ARRAY[${requestIds.map(() => '?').join(',')}]::uuid[])`,
      {
        replacements: requestIds,
        type: QueryTypes.DELETE,
        transaction
      }
    );
    
    // Step 2: Delete in order (respecting foreign key constraints)
    // Start with child tables, then parent tables
    
    // Helper function to delete with array
    const deleteWithArray = async (tableName: string, columnName: string = 'request_id') => {
      await sequelize.query(
        `DELETE FROM ${tableName} WHERE ${columnName} = ANY(ARRAY[${requestIds.map(() => '?').join(',')}]::uuid[])`,
        {
          replacements: requestIds,
          type: QueryTypes.DELETE,
          transaction
        }
      );
    };
    
    // Delete from claim_budget_tracking (new table)
    logger.info('[Cleanup] Deleting from claim_budget_tracking...');
    await deleteWithArray('claim_budget_tracking');
    
    // Delete from internal_orders (new table)
    logger.info('[Cleanup] Deleting from internal_orders...');
    await deleteWithArray('internal_orders');
    
    // Delete from dealer_proposal_cost_items
    logger.info('[Cleanup] Deleting from dealer_proposal_cost_items...');
    await deleteWithArray('dealer_proposal_cost_items');
    
    // Delete from dealer_completion_details
    logger.info('[Cleanup] Deleting from dealer_completion_details...');
    await deleteWithArray('dealer_completion_details');
    
    // Delete from dealer_proposal_details
    logger.info('[Cleanup] Deleting from dealer_proposal_details...');
    await deleteWithArray('dealer_proposal_details');
    
    // Delete from dealer_claim_details
    logger.info('[Cleanup] Deleting from dealer_claim_details...');
    await deleteWithArray('dealer_claim_details');
    
    // Delete from activities (workflow activities)
    logger.info('[Cleanup] Deleting from activities...');
    await deleteWithArray('activities');
    
    // Delete from work_notes
    logger.info('[Cleanup] Deleting from work_notes...');
    await deleteWithArray('work_notes');
    
    // Delete from documents
    logger.info('[Cleanup] Deleting from documents...');
    await deleteWithArray('documents');
    
    // Delete from participants
    logger.info('[Cleanup] Deleting from participants...');
    await deleteWithArray('participants');
    
    // Delete from approval_levels
    logger.info('[Cleanup] Deleting from approval_levels...');
    await deleteWithArray('approval_levels');
    
    // Note: subscriptions table doesn't have request_id - it's for push notification subscriptions
    // Skip subscriptions as it's not related to workflow requests
    
    // Delete from notifications
    logger.info('[Cleanup] Deleting from notifications...');
    await deleteWithArray('notifications');
    
    // Delete from request_summaries
    logger.info('[Cleanup] Deleting from request_summaries...');
    await deleteWithArray('request_summaries');
    
    // Delete from shared_summaries
    logger.info('[Cleanup] Deleting from shared_summaries...');
    await deleteWithArray('shared_summaries');
    
    // Delete from conclusion_remarks
    logger.info('[Cleanup] Deleting from conclusion_remarks...');
    await deleteWithArray('conclusion_remarks');
    
    // Delete from tat_alerts
    logger.info('[Cleanup] Deleting from tat_alerts...');
    await deleteWithArray('tat_alerts');
    
    // Finally, delete from workflow_requests
    logger.info('[Cleanup] Deleting from workflow_requests...');
    await deleteWithArray('workflow_requests');
    
    await transaction.commit();
    
    logger.info(`[Cleanup] ✅ Successfully deleted ${count} CLAIM_MANAGEMENT request(s) and all related data!`);
    logger.info('[Cleanup] Database is now clean and ready for fresh dealer claim requests.');
    
  } catch (error) {
    await transaction.rollback();
    logger.error('[Cleanup] ❌ Error during cleanup:', error);
    throw error;
  }
}

// Run cleanup if called directly
if (require.main === module) {
  cleanupDealerClaims()
    .then(() => {
      logger.info('[Cleanup] Cleanup completed successfully');
      process.exit(0);
    })
    .catch((error) => {
      logger.error('[Cleanup] Cleanup failed:', error);
      process.exit(1);
    });
}

export { cleanupDealerClaims };