const { User } = require('../models');

// Patients Controller
exports.list = async (req, res, next) => {
  try {
    // Only return patients created by the authenticated user
    const patients = await User.findAll({
      where: {
        role: 'patient',
        createdBy: req.user.id,
      },
    });
    res.json(patients);
  } catch (err) {
    next(err);
  }
};

exports.create = async (req, res, next) => {
  try {
    // Only caregivers can add patients (enforced by route middleware)
    const requiredFields = [
      'firstName', 'lastName', 'email', 'phoneNumber', 'emergencyNumber',
      'callFrequency', 'callTime', 'retryInterval', 'maxRetry', 'contactType'
    ];
    for (const field of requiredFields) {
      if (!req.body[field]) {
        return res.status(400).json({ error: `${field} is required` });
      }
    }
    // Unique email/phone check
    const existingEmail = await User.findOne({ where: { email: req.body.email } });
    if (existingEmail) return res.status(409).json({ error: 'Email already in use' });
    const existingPhone = await User.findOne({ where: { phoneNumber: req.body.phoneNumber } });
    if (existingPhone) return res.status(409).json({ error: 'Phone number already in use' });
    // Create patient
    const patient = await User.create({
      firstName: req.body.firstName,
      lastName: req.body.lastName,
      email: req.body.email,
      phoneNumber: req.body.phoneNumber,
      emergencyNumber: req.body.emergencyNumber,
      callFrequency: req.body.callFrequency,
      callTime: req.body.callTime,
      retryInterval: req.body.retryInterval,
      maxRetry: req.body.maxRetry,
      contactType: req.body.contactType,
      timeZone: req.body.timeZone,
      scripts: req.body.scripts,
      genderVoiceCall: req.body.genderVoiceCall,
      voiceStyleCall: req.body.voiceStyleCall,
      role: 'patient',
      createdBy: req.user.id,
    });
    res.status(201).json({
      id: patient.id,
      firstName: patient.firstName,
      lastName: patient.lastName,
      email: patient.email,
      phoneNumber: patient.phoneNumber,
      emergencyNumber: patient.emergencyNumber,
      callFrequency: patient.callFrequency,
      callTime: patient.callTime,
      retryInterval: patient.retryInterval,
      maxRetry: patient.maxRetry,
      contactType: patient.contactType,
      timeZone: patient.timeZone,
      scripts: patient.scripts,
      genderVoiceCall: patient.genderVoiceCall,
      voiceStyleCall: patient.voiceStyleCall,
      role: patient.role,
      createdBy: patient.createdBy,
    });
  } catch (err) {
    next(err);
  }
};

exports.get = async (req, res, next) => {
  // TODO: Get patient by ID
  res.json({});
};

exports.update = async (req, res, next) => {
  // TODO: Update patient by ID
  res.json({});
};

exports.remove = async (req, res, next) => {
  // TODO: Delete patient by ID
  res.status(204).send();
};

exports.total = async (req, res, next) => {
  // TODO: Return total patients count
  res.json({ total: 0 });
};