import * as contactService from '../services/contact.service.js';
import { discoverContactsFromJMAP, getJmapConfigFromAccount } from '../services/jmap.service.js';
import { formatErrorResponse } from '../utils/errors.js';
import * as emailAccountService from '../services/email-account.service.js';
import { logger } from '../utils/logger.js';

/**
 * Get all contacts for authenticated user
 * GET /api/contacts?accountId=xxx (optional)
 */
export const getContacts = async (req, res) => {
  try {
    const userId = req.userId;
    const { accountId } = req.query;

    const contacts = await contactService.getUserContacts(userId, accountId || null);

    res.status(200).json({
      success: true,
      count: contacts.length,
      data: contacts,
    });
  } catch (error) {
    const errorResponse = formatErrorResponse(error, process.env.NODE_ENV === 'development');
    res.status(error.statusCode || 500).json(errorResponse);
  }
};

/**
 * Discover potential contacts from JMAP (email senders)
 * GET /api/contacts/discover?accountId=xxx&search=query&limit=50
 */
export const discoverContacts = async (req, res) => {
  try {
    const userId = req.userId;
    const { accountId, search = '', limit = 50 } = req.query;

    logger.debug('discoverContacts called', { userId, accountId, search, limit });

    // Get email account (or primary if not specified)
    let emailAccount;
    if (accountId) {
      logger.debug('Getting email account by ID', { accountId });
      emailAccount = await emailAccountService.getEmailAccountWithCredentials(accountId, userId);
      logger.debug('Email account retrieved', { id: emailAccount.id, email: emailAccount.email });
    } else {
      logger.debug('No accountId provided, getting primary account', { userId });
      const primaryAccount = await emailAccountService.getPrimaryEmailAccount(userId);
      logger.debug('Primary account', primaryAccount ? { id: primaryAccount.id, email: primaryAccount.email } : { found: false });
      if (!primaryAccount) {
        return res.status(400).json({
          success: false,
          error: {
            message: 'Najprv musíš pripojiť email účet v Profile',
            statusCode: 400,
          },
        });
      }
      emailAccount = await emailAccountService.getEmailAccountWithCredentials(primaryAccount.id, userId);
      logger.debug('Email account retrieved from primary', { id: emailAccount.id, email: emailAccount.email });
    }

    const jmapConfig = getJmapConfigFromAccount(emailAccount);
    logger.debug('JMAP Config created', {
      server: jmapConfig.server,
      username: jmapConfig.username,
      accountId: jmapConfig.accountId,
      hasPassword: !!jmapConfig.password
    });

    const potentialContacts = await discoverContactsFromJMAP(
      jmapConfig,
      userId,
      search,
      parseInt(limit)
    );

    res.status(200).json({
      success: true,
      count: potentialContacts.length,
      data: potentialContacts,
    });
  } catch (error) {
    logger.error('ERROR in discoverContacts', { error: error.message, stack: error.stack });
    const errorResponse = formatErrorResponse(error, process.env.NODE_ENV === 'development');
    res.status(error.statusCode || 500).json(errorResponse);
  }
};

/**
 * Add a new contact
 * POST /api/contacts
 * Body: { email, name, notes, accountId }
 */
export const addContact = async (req, res) => {
  try {
    const userId = req.userId;
    logger.debug('Full req.body', { body: req.body });
    const { email, name = '', notes = '', accountId } = req.body;

    logger.debug('addContact called', { userId, email, name, accountId });

    if (!email) {
      return res.status(400).json({
        success: false,
        error: {
          message: 'Email je povinný',
          statusCode: 400,
        },
      });
    }

    // Get email account (or primary if not specified)
    let emailAccount;
    if (accountId) {
      logger.debug('Using provided accountId', { accountId });
      emailAccount = await emailAccountService.getEmailAccountWithCredentials(accountId, userId);
    } else {
      logger.debug('No accountId provided, using primary account');
      const primaryAccount = await emailAccountService.getPrimaryEmailAccount(userId);
      if (!primaryAccount) {
        return res.status(400).json({
          success: false,
          error: {
            message: 'Najprv musíš pripojiť email účet v Profile',
            statusCode: 400,
          },
        });
      }
      emailAccount = await emailAccountService.getEmailAccountWithCredentials(primaryAccount.id, userId);
      logger.debug('Using primary account', { accountId: primaryAccount.id });
    }

    const jmapConfig = getJmapConfigFromAccount(emailAccount);

    const contact = await contactService.addContact(
      userId,
      emailAccount.id,
      jmapConfig,
      email,
      name,
      notes
    );

    res.status(201).json({
      success: true,
      data: contact,
      message: 'Kontakt pridaný a emaily synchronizované',
    });
  } catch (error) {
    const errorResponse = formatErrorResponse(error, process.env.NODE_ENV === 'development');
    res.status(error.statusCode || 500).json(errorResponse);
  }
};

/**
 * Remove a contact
 * DELETE /api/contacts/:contactId
 */
export const removeContact = async (req, res) => {
  try {
    const userId = req.userId;
    const { contactId } = req.params;

    const result = await contactService.removeContact(userId, contactId);

    res.status(200).json({
      success: true,
      message: result.message,
    });
  } catch (error) {
    const errorResponse = formatErrorResponse(error, process.env.NODE_ENV === 'development');
    res.status(error.statusCode || 500).json(errorResponse);
  }
};

/**
 * Update a contact
 * PATCH /api/contacts/:contactId
 */
export const updateContact = async (req, res) => {
  try {
    const userId = req.userId;
    const { contactId } = req.params;
    const { name, notes } = req.body;

    const updated = await contactService.updateContact(userId, contactId, { name, notes });

    res.status(200).json({
      success: true,
      data: updated,
      message: 'Kontakt aktualizovaný',
    });
  } catch (error) {
    const errorResponse = formatErrorResponse(error, process.env.NODE_ENV === 'development');
    res.status(error.statusCode || 500).json(errorResponse);
  }
};