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

/**
 * Get all contacts for an email account
 * GET /api/contacts?accountId=xxx (required)
 */
export const getContacts = async (req, res, next) => {
  try {
    const userId = req.userId;
    const { accountId } = req.query;

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

    // Verify user has access to this email account
    await emailAccountService.getEmailAccountById(accountId, userId);

    // Get contacts for email account
    const contacts = await contactService.getContactsForEmailAccount(accountId);

    res.status(200).json({
      success: true,
      count: contacts.length,
      data: contacts,
    });
  } catch (error) {
    next(error);
  }
};

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

    // Get email account (or primary if not specified)
    let emailAccount;
    if (accountId) {
      emailAccount = await emailAccountService.getEmailAccountWithCredentials(accountId, userId);
    } else {
      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);
    }

    const jmapConfig = getJmapConfigFromAccount(emailAccount);

    const potentialContacts = await discoverContactsFromJMAP(
      jmapConfig,
      emailAccount.id, // emailAccountId
      search,
      parseInt(limit)
    );

    res.status(200).json({
      success: true,
      count: potentialContacts.length,
      data: potentialContacts,
    });
  } catch (error) {
    next(error);
  }
};

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

    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) {
      emailAccount = await emailAccountService.getEmailAccountWithCredentials(accountId, userId);
    } else {
      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);
    }

    const jmapConfig = getJmapConfigFromAccount(emailAccount);

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

    res.status(201).json({
      success: true,
      data: contact,
      message: 'Kontakt pridaný a emaily synchronizované',
    });
  } catch (error) {
    next(error);
  }
};

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

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

    // Verify user has access to this email account
    await emailAccountService.getEmailAccountById(accountId, userId);

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

    res.status(200).json({
      success: true,
      message: result.message,
    });
  } catch (error) {
    next(error);
  }
};

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

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

    // Verify user has access to this email account
    await emailAccountService.getEmailAccountById(accountId, userId);

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

    res.status(200).json({
      success: true,
      data: updated,
      message: 'Kontakt aktualizovaný',
    });
  } catch (error) {
    next(error);
  }
};

/**
 * Link company to contact
 * POST /api/contacts/:contactId/link-company?accountId=xxx
 * Body: { companyId }
 */
export const linkCompanyToContact = async (req, res, next) => {
  try {
    const userId = req.userId;
    const { contactId } = req.params;
    const { accountId } = req.query;
    const { companyId } = req.body;

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

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

    // Verify user has access to this email account
    await emailAccountService.getEmailAccountById(accountId, userId);

    const updated = await contactService.linkCompanyToContact(contactId, accountId, companyId);

    res.status(200).json({
      success: true,
      data: updated,
      message: 'Firma bola linknutá ku kontaktu',
    });
  } catch (error) {
    next(error);
  }
};

/**
 * Unlink company from contact
 * POST /api/contacts/:contactId/unlink-company?accountId=xxx
 */
export const unlinkCompanyFromContact = async (req, res, next) => {
  try {
    const userId = req.userId;
    const { contactId } = req.params;
    const { accountId } = req.query;

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

    // Verify user has access to this email account
    await emailAccountService.getEmailAccountById(accountId, userId);

    const updated = await contactService.unlinkCompanyFromContact(contactId, accountId);

    res.status(200).json({
      success: true,
      data: updated,
      message: 'Firma bola odlinknutá od kontaktu',
    });
  } catch (error) {
    next(error);
  }
};

/**
 * Create company from contact
 * POST /api/contacts/:contactId/create-company?accountId=xxx
 * Body: { name, email, phone, address, city, country, website, description } (all optional, uses contact data as defaults)
 */
export const createCompanyFromContact = async (req, res, next) => {
  try {
    const userId = req.userId;
    const { contactId } = req.params;
    const { accountId } = req.query;
    const companyData = req.body;

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

    // Verify user has access to this email account
    await emailAccountService.getEmailAccountById(accountId, userId);

    const result = await contactService.createCompanyFromContact(contactId, accountId, userId, companyData);

    res.status(201).json({
      success: true,
      data: result,
      message: 'Firma bola vytvorená z kontaktu',
    });
  } catch (error) {
    next(error);
  }
};