const { success } = require('../../utils/response');
const n8nService = require('../../services/n8nService');

/**
 * Fetch data via n8n workflow
 */
async function fetchData(req, res) {
  const { provider, service, module } = req.params;
  const userId = req.user.uuid;
  
  const options = {
    limit: parseInt(req.query.limit) || 200,
    page: parseInt(req.query.page) || 1,
    offset: parseInt(req.query.offset) || 0,
    filters: req.query.filters || {}
  };

  try {
    const result = await n8nService.fetchData(userId, provider, service, module, options);
    
    res.json(success(`${provider} ${service} ${module} data fetched successfully`, result));
  } catch (error) {
    res.status(400).json({
      status: 'error',
      message: error.message,
      errorCode: 'N8N_FETCH_ERROR',
      timestamp: new Date().toISOString()
    });
  }
}

/**
 * Get supported providers and modules
 */
async function getSupportedProviders(req, res) {
  try {
    const providers = n8nService.getSupportedProviders();
    res.json(success('Supported providers retrieved', providers));
  } catch (error) {
    res.status(500).json({
      status: 'error',
      message: error.message,
      errorCode: 'N8N_ERROR',
      timestamp: new Date().toISOString()
    });
  }
}

/**
 * Fetch Zoho data (shorthand)
 */
async function fetchZohoData(req, res) {
  const { service, module } = req.params;
  const userId = req.user.uuid;
  
  const options = {
    limit: parseInt(req.query.limit) || 200,
    page: parseInt(req.query.page) || 1,
    filters: req.query
  };

  try {
    const result = await n8nService.fetchData(userId, 'zoho', service, module, options);
    res.json(success(`Zoho ${service} ${module} data fetched successfully`, result));
  } catch (error) {
    res.status(400).json({
      status: 'error',
      message: error.message,
      errorCode: 'ZOHO_FETCH_ERROR',
      timestamp: new Date().toISOString()
    });
  }
}

/**
 * Fetch Salesforce data (shorthand)
 */
async function fetchSalesforceData(req, res) {
  const { service, module } = req.params;
  const userId = req.user.uuid;
  
  const options = {
    limit: parseInt(req.query.limit) || 200,
    offset: parseInt(req.query.offset) || 0,
    nextRecordsUrl: req.query.nextRecordsUrl || null, // Salesforce pagination
    filters: req.query
  };

  try {
    const result = await n8nService.fetchData(userId, 'salesforce', service, module, options);
    res.json(success(`Salesforce ${service} ${module} data fetched successfully`, result));
  } catch (error) {
    res.status(400).json({
      status: 'error',
      message: error.message,
      errorCode: 'SALESFORCE_FETCH_ERROR',
      timestamp: new Date().toISOString()
    });
  }
}

module.exports = {
  fetchData,
  getSupportedProviders,
  fetchZohoData,
  fetchSalesforceData
};