const { TrackingToken, Company, ClickLog } = require('../models');
const tokenService = require('../services/token.service');
const logger = require('../config/logger');

// Get all tokens
exports.getAllTokens = async (req, res, next) => {
  try {
    const { company_id, limit = 50, offset = 0 } = req.query;

    const where = {};
    if (company_id) {
      where.company_id = company_id;
    }

    const tokens = await TrackingToken.findAll({
      where,
      include: [{ model: Company, as: 'company', attributes: ['id', 'name', 'industry'] }],
      order: [['created_at', 'DESC']],
      limit: parseInt(limit),
      offset: parseInt(offset),
    });

    const total = await TrackingToken.count({ where });

    res.json({
      success: true,
      data: tokens,
      pagination: {
        total,
        limit: parseInt(limit),
        offset: parseInt(offset),
        hasMore: parseInt(offset) + parseInt(limit) < total,
      },
    });
  } catch (error) {
    next(error);
  }
};

// Get token by ID
exports.getTokenById = async (req, res, next) => {
  try {
    const { id } = req.params;

    const token = await TrackingToken.findByPk(id, {
      include: [{ model: Company, as: 'company' }],
    });

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

    res.json({
      success: true,
      data: token,
    });
  } catch (error) {
    next(error);
  }
};

// Create token (without sending mail)
exports.createToken = async (req, res, next) => {
  try {
    const { company_id, target_email, employee_name, template_type } = req.body;

    const token = await tokenService.createToken({
      company_id,
      target_email,
      employee_name,
      template_type,
    });

    const trackingUrl = `${process.env.BASE_URL}/t/${token.token}`;

    res.status(201).json({
      success: true,
      message: 'Token created successfully',
      data: {
        ...token.toJSON(),
        tracking_url: trackingUrl,
      },
    });
  } catch (error) {
    next(error);
  }
};

// Create token and send mail
exports.createAndSendToken = async (req, res, next) => {
  try {
    const { company_id, target_email, employee_name, template_type } = req.body;

    // Create token
    const token = await tokenService.createToken({
      company_id,
      target_email,
      employee_name,
      template_type,
    });

    // Send mail
    try {
      await tokenService.sendMail(token.id);
    } catch (mailError) {
      logger.error('Failed to send mail:', mailError);
      return res.status(500).json({
        success: false,
        error: 'Token created but failed to send mail',
        details: mailError.message,
        token_id: token.id,
      });
    }

    const trackingUrl = `${process.env.BASE_URL}/t/${token.token}`;

    res.status(201).json({
      success: true,
      message: 'Token created and mail sent successfully',
      data: {
        ...token.toJSON(),
        tracking_url: trackingUrl,
        mail_sent: true,
      },
    });
  } catch (error) {
    next(error);
  }
};

// Send mail for existing token
exports.sendTokenMail = async (req, res, next) => {
  try {
    const { id } = req.params;

    await tokenService.sendMail(id);

    res.json({
      success: true,
      message: 'Mail sent successfully',
    });
  } catch (error) {
    next(error);
  }
};

// Update token
exports.updateToken = async (req, res, next) => {
  try {
    const { id } = req.params;
    const { notes } = req.body;

    const token = await TrackingToken.findByPk(id);

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

    await token.update({ notes });

    logger.info(`Token updated: ${id}`);

    res.json({
      success: true,
      message: 'Token updated successfully',
      data: token,
    });
  } catch (error) {
    next(error);
  }
};

// Delete token
exports.deleteToken = async (req, res, next) => {
  try {
    const { id } = req.params;

    const token = await TrackingToken.findByPk(id);

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

    const companyId = token.company_id;

    await token.destroy();

    // Update company stats
    await tokenService.updateCompanyStats(companyId);

    logger.info(`Token deleted: ${id}`);

    res.json({
      success: true,
      message: 'Token deleted successfully',
    });
  } catch (error) {
    next(error);
  }
};

// Get token click logs
exports.getTokenClicks = async (req, res, next) => {
  try {
    const { id } = req.params;

    const token = await TrackingToken.findByPk(id);

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

    const clicks = await ClickLog.findAll({
      where: { token_id: id },
      order: [['clicked_at', 'DESC']],
    });

    res.json({
      success: true,
      data: clicks,
      count: clicks.length,
    });
  } catch (error) {
    next(error);
  }
};