const nocoDB = require('../services/nocodb');
const { validateEmail } = require('../utils/validators');

class CustomRecipientsController {
  /**
   * Get all custom recipients for a campaign
   */
  async getRecipientsByCampaign(req, res, next) {
    try {
      const { slug } = req.params;

      // Get campaign first to verify it exists and get ID
      const campaign = await nocoDB.getCampaignBySlug(slug);
      if (!campaign) {
        return res.status(404).json({ error: 'Campaign not found' });
      }

      // Check if custom recipients are enabled for this campaign
      // Use NocoDB column title, not camelCase
      if (!campaign['Allow Custom Recipients']) {
        return res.json({ recipients: [], message: 'Custom recipients not enabled for this campaign' });
      }

      // Get custom recipients for this campaign using slug
      const recipients = await nocoDB.getCustomRecipientsBySlug(slug);

      res.json({
        success: true,
        recipients: recipients || [],
        count: recipients ? recipients.length : 0
      });
    } catch (error) {
      console.error('Error fetching custom recipients:', error);
      next(error);
    }
  }

  /**
   * Create a single custom recipient
   */
  async createRecipient(req, res, next) {
    try {
      const { slug } = req.params;
      const { recipient_name, recipient_email, recipient_title, recipient_organization, notes } = req.body;

      // Validate required fields
      if (!recipient_name || !recipient_email) {
        return res.status(400).json({ error: 'Recipient name and email are required' });
      }

      // Validate email format
      if (!validateEmail(recipient_email)) {
        return res.status(400).json({ error: 'Invalid email format' });
      }

      // Get campaign to verify it exists and get ID
      const campaign = await nocoDB.getCampaignBySlug(slug);
      if (!campaign) {
        return res.status(404).json({ error: 'Campaign not found' });
      }

      // Check if custom recipients are enabled for this campaign
      // Use NocoDB column title, not camelCase field name
      if (!campaign['Allow Custom Recipients']) {
        console.warn('Custom recipients not enabled. Campaign data:', campaign);
        return res.status(403).json({ error: 'Custom recipients not enabled for this campaign' });
      }

      // Create the recipient
      // Use campaign.ID (NocoDB system field) not campaign.id
      const recipientData = {
        campaign_id: campaign.ID,
        campaign_slug: slug,
        recipient_name,
        recipient_email,
        recipient_title: recipient_title || null,
        recipient_organization: recipient_organization || null,
        notes: notes || null,
        is_active: true
      };

      const newRecipient = await nocoDB.createCustomRecipient(recipientData);

      res.status(201).json({
        success: true,
        recipient: newRecipient,
        message: 'Recipient created successfully'
      });
    } catch (error) {
      console.error('Error creating custom recipient:', error);
      next(error);
    }
  }

  /**
   * Bulk create custom recipients
   */
  async bulkCreateRecipients(req, res, next) {
    try {
      const { slug } = req.params;
      const { recipients } = req.body;

      // Validate input
      if (!Array.isArray(recipients) || recipients.length === 0) {
        return res.status(400).json({ error: 'Recipients array is required and must not be empty' });
      }

      // Get campaign to verify it exists and get ID
      const campaign = await nocoDB.getCampaignBySlug(slug);
      if (!campaign) {
        return res.status(404).json({ error: 'Campaign not found' });
      }

      // Check if custom recipients are enabled for this campaign
      if (!campaign.allow_custom_recipients) {
        return res.status(403).json({ error: 'Custom recipients not enabled for this campaign' });
      }

      const results = {
        success: [],
        failed: [],
        total: recipients.length
      };

      // Process each recipient
      for (const recipient of recipients) {
        try {
          // Validate required fields
          if (!recipient.recipient_name || !recipient.recipient_email) {
            results.failed.push({
              recipient,
              error: 'Missing required fields (name or email)'
            });
            continue;
          }

          // Validate email format
          if (!validateEmail(recipient.recipient_email)) {
            results.failed.push({
              recipient,
              error: 'Invalid email format'
            });
            continue;
          }

          // Create the recipient
          const recipientData = {
            campaign_id: campaign.id,
            campaign_slug: slug,
            recipient_name: recipient.recipient_name,
            recipient_email: recipient.recipient_email,
            recipient_title: recipient.recipient_title || null,
            recipient_organization: recipient.recipient_organization || null,
            notes: recipient.notes || null,
            is_active: true
          };

          const newRecipient = await nocoDB.createCustomRecipient(recipientData);
          results.success.push(newRecipient);
        } catch (error) {
          results.failed.push({
            recipient,
            error: error.message || 'Unknown error'
          });
        }
      }

      res.status(201).json({
        success: true,
        results,
        message: `Successfully created ${results.success.length} of ${results.total} recipients`
      });
    } catch (error) {
      console.error('Error bulk creating custom recipients:', error);
      next(error);
    }
  }

  /**
   * Update a custom recipient
   */
  async updateRecipient(req, res, next) {
    try {
      const { slug, id } = req.params;
      const { recipient_name, recipient_email, recipient_title, recipient_organization, notes, is_active } = req.body;

      // Validate email if provided
      if (recipient_email && !validateEmail(recipient_email)) {
        return res.status(400).json({ error: 'Invalid email format' });
      }

      // Get campaign to verify it exists
      const campaign = await nocoDB.getCampaignBySlug(slug);
      if (!campaign) {
        return res.status(404).json({ error: 'Campaign not found' });
      }

      // Build update data (only include provided fields)
      const updateData = {};
      if (recipient_name !== undefined) updateData.recipient_name = recipient_name;
      if (recipient_email !== undefined) updateData.recipient_email = recipient_email;
      if (recipient_title !== undefined) updateData.recipient_title = recipient_title;
      if (recipient_organization !== undefined) updateData.recipient_organization = recipient_organization;
      if (notes !== undefined) updateData.notes = notes;
      if (is_active !== undefined) updateData.is_active = is_active;

      // Update the recipient
      const updatedRecipient = await nocoDB.updateCustomRecipient(id, updateData);

      if (!updatedRecipient) {
        return res.status(404).json({ error: 'Recipient not found' });
      }

      res.json({
        success: true,
        recipient: updatedRecipient,
        message: 'Recipient updated successfully'
      });
    } catch (error) {
      console.error('Error updating custom recipient:', error);
      next(error);
    }
  }

  /**
   * Delete a custom recipient
   */
  async deleteRecipient(req, res, next) {
    try {
      const { slug, id } = req.params;

      // Get campaign to verify it exists
      const campaign = await nocoDB.getCampaignBySlug(slug);
      if (!campaign) {
        return res.status(404).json({ error: 'Campaign not found' });
      }

      // Delete the recipient
      const deleted = await nocoDB.deleteCustomRecipient(id);

      if (!deleted) {
        return res.status(404).json({ error: 'Recipient not found' });
      }

      res.json({
        success: true,
        message: 'Recipient deleted successfully'
      });
    } catch (error) {
      console.error('Error deleting custom recipient:', error);
      next(error);
    }
  }

  /**
   * Delete all custom recipients for a campaign
   */
  async deleteAllRecipients(req, res, next) {
    try {
      const { slug } = req.params;

      // Get campaign to verify it exists and get ID
      const campaign = await nocoDB.getCampaignBySlug(slug);
      if (!campaign) {
        return res.status(404).json({ error: 'Campaign not found' });
      }

      // Delete all recipients for this campaign
      const deletedCount = await nocoDB.deleteCustomRecipientsByCampaign(campaign.id);

      res.json({
        success: true,
        deletedCount,
        message: `Successfully deleted ${deletedCount} recipient(s)`
      });
    } catch (error) {
      console.error('Error deleting all custom recipients:', error);
      next(error);
    }
  }
}

module.exports = new CustomRecipientsController();