/**
 * Contact Controller
 * Handle general contact form submissions
 */

const Contact = require('../models/Contact.model');
const logger = require('../utils/logger.util');
const { getClientIp } = require('../utils/security-logger');

/**
 * POST /api/contact/submit
 * Submit a contact form
 */
async function submit(req, res) {
  try {
    const { type, name, email, organization, phone, subject, message } = req.body;

    // Create contact record
    const contact = await Contact.create({
      type: type || 'general',
      contact: {
        name,
        email,
        organization,
        phone
      },
      inquiry: {
        subject,
        message
      },
      source: 'footer_contact',
      metadata: {
        user_agent: req.get('user-agent'),
        ip: getClientIp(req),
        source_page: req.get('referer'),
        referrer: req.get('referer')
      }
    });

    logger.info(`[Contact] New submission: ${contact._id} from ${email}`);

    res.status(201).json({
      success: true,
      message: 'Thank you for contacting us. We will respond within 24 hours.',
      contact_id: contact._id
    });

  } catch (error) {
    logger.error('[Contact] Submit error:', error);
    res.status(500).json({
      success: false,
      error: 'Failed to submit contact form',
      message: 'An error occurred while submitting your message. Please try again.'
    });
  }
}

/**
 * GET /api/contact/admin/list
 * List contact submissions (admin)
 */
async function list(req, res) {
  try {
    const { status, type, priority, limit = 20, skip = 0 } = req.query;

    const filters = {};
    if (status) filters.status = status;
    if (type) filters.type = type;
    if (priority) filters.priority = priority;

    const contacts = await Contact.list(filters, {
      limit: parseInt(limit),
      skip: parseInt(skip)
    });

    const total = await Contact.countByStatus(status || undefined);

    res.json({
      success: true,
      contacts,
      pagination: {
        total,
        limit: parseInt(limit),
        skip: parseInt(skip),
        hasMore: parseInt(skip) + contacts.length < total
      }
    });

  } catch (error) {
    logger.error('[Contact] List error:', error);
    res.status(500).json({
      success: false,
      error: 'Failed to fetch contacts'
    });
  }
}

/**
 * GET /api/contact/admin/stats
 * Get contact statistics (admin)
 */
async function getStats(req, res) {
  try {
    const stats = await Contact.getStats();

    res.json({
      success: true,
      stats
    });

  } catch (error) {
    logger.error('[Contact] Stats error:', error);
    res.status(500).json({
      success: false,
      error: 'Failed to fetch statistics'
    });
  }
}

/**
 * GET /api/contact/admin/:id
 * Get single contact by ID (admin)
 */
async function getById(req, res) {
  try {
    const { id } = req.params;

    const contact = await Contact.findById(id);

    if (!contact) {
      return res.status(404).json({
        success: false,
        error: 'Contact not found'
      });
    }

    res.json({
      success: true,
      contact
    });

  } catch (error) {
    logger.error('[Contact] Get by ID error:', error);
    res.status(500).json({
      success: false,
      error: 'Failed to fetch contact'
    });
  }
}

/**
 * POST /api/contact/admin/:id/assign
 * Assign contact to admin user
 */
async function assign(req, res) {
  try {
    const { id } = req.params;
    const { user_id } = req.body;

    const contact = await Contact.assign(id, user_id);

    res.json({
      success: true,
      message: 'Contact assigned successfully',
      contact
    });

  } catch (error) {
    logger.error('[Contact] Assign error:', error);
    res.status(500).json({
      success: false,
      error: 'Failed to assign contact'
    });
  }
}

/**
 * POST /api/contact/admin/:id/respond
 * Mark contact as responded
 */
async function respond(req, res) {
  try {
    const { id } = req.params;
    const { content } = req.body;

    const contact = await Contact.markResponded(id, {
      content,
      responder: req.user.id
    });

    res.json({
      success: true,
      message: 'Response recorded successfully',
      contact
    });

  } catch (error) {
    logger.error('[Contact] Respond error:', error);
    res.status(500).json({
      success: false,
      error: 'Failed to record response'
    });
  }
}

/**
 * PUT /api/contact/admin/:id
 * Update contact
 */
async function update(req, res) {
  try {
    const { id } = req.params;
    const { status, priority, assigned_to } = req.body;

    const updateData = {};
    if (status) updateData.status = status;
    if (priority) updateData.priority = priority;
    if (assigned_to !== undefined) updateData.assigned_to = assigned_to;

    const contact = await Contact.update(id, updateData);

    res.json({
      success: true,
      message: 'Contact updated successfully',
      contact
    });

  } catch (error) {
    logger.error('[Contact] Update error:', error);
    res.status(500).json({
      success: false,
      error: 'Failed to update contact'
    });
  }
}

/**
 * DELETE /api/contact/admin/:id
 * Delete contact
 */
async function deleteContact(req, res) {
  try {
    const { id } = req.params;

    await Contact.delete(id);

    res.json({
      success: true,
      message: 'Contact deleted successfully'
    });

  } catch (error) {
    logger.error('[Contact] Delete error:', error);
    res.status(500).json({
      success: false,
      error: 'Failed to delete contact'
    });
  }
}

module.exports = {
  submit,
  list,
  getStats,
  getById,
  assign,
  respond,
  update,
  deleteContact
};