<?php

require_once __DIR__ . '/Database.php';

class User {
    private $db;

    public function __construct() {
        $this->db = Database::getInstance()->getConnection();
    }

    public function getAll($includeInactive = false) {
        $sql = "SELECT * FROM users";
        if (!$includeInactive) {
            $sql .= " WHERE activo = 1";
        }
        $sql .= " ORDER BY nombre";
        $stmt = $this->db->query($sql);
        return $stmt->fetchAll();
    }

    public function getById($id) {
        $stmt = $this->db->prepare("SELECT * FROM users WHERE id = ?");
        $stmt->execute([$id]);
        return $stmt->fetch();
    }

    public function getByEmail($email) {
        $stmt = $this->db->prepare("SELECT * FROM users WHERE email = ?");
        $stmt->execute([$email]);
        return $stmt->fetch();
    }

    public function findByLogin($login) {
        $login = trim($login);
        $stmt = $this->db->prepare("SELECT * FROM users WHERE (email = ? OR username = ?) AND activo = 1");
        $stmt->execute([$login, $login]);
        return $stmt->fetch();
    }

    public function getByUsername($username) {
        $stmt = $this->db->prepare("SELECT * FROM users WHERE username = ?");
        $stmt->execute([$username]);
        return $stmt->fetch();
    }

    public function usernameExists($username, $excludeId = null) {
        $sql = "SELECT COUNT(*) as total FROM users WHERE username = ?";
        $params = [$username];
        if ($excludeId) {
            $sql .= " AND id != ?";
            $params[] = $excludeId;
        }
        $stmt = $this->db->prepare($sql);
        $stmt->execute($params);
        return $stmt->fetch()['total'] > 0;
    }

    public function create($data) {
        $username = !empty($data['username']) ? $data['username'] : strtolower(preg_replace('/[^a-zA-Z0-9]/', '', $data['nombre']));
        $stmt = $this->db->prepare("
            INSERT INTO users (username, nombre, email, password, rol) 
            VALUES (?, ?, ?, ?, ?)
        ");
        $password = password_hash($data['password'], PASSWORD_DEFAULT);
        $stmt->execute([
            $username,
            $data['nombre'],
            $data['email'],
            $password,
            $data['rol'] ?? 'ayudante'
        ]);
        
        $userId = $this->db->lastInsertId();
        
        // Si es un ayudante, agregar automáticamente a rotacion_orden
        if (isset($data['rol']) && $data['rol'] === 'ayudante') {
            $this->agregarARotacion($userId);
        }
        
        return $userId;
    }
    
    private function agregarARotacion($userId) {
        // Obtener el siguiente orden disponible
        $stmt = $this->db->query("SELECT MAX(orden) as max_orden FROM rotacion_orden WHERE activo = 1");
        $result = $stmt->fetch();
        $nuevoOrden = ($result['max_orden'] ?? 0) + 1;
        
        // Insertar en rotacion_orden
        $stmt = $this->db->prepare("
            INSERT INTO rotacion_orden (user_id, orden, activo) 
            VALUES (?, ?, 1)
        ");
        $stmt->execute([$userId, $nuevoOrden]);
    }

    public function update($id, $data) {
        $sql = "UPDATE users SET username = ?, nombre = ?, email = ?, rol = ?";
        $params = [$data['username'] ?? '', $data['nombre'], $data['email'], $data['rol']];

        if (!empty($data['password'])) {
            $sql .= ", password = ?";
            $params[] = password_hash($data['password'], PASSWORD_DEFAULT);
        }

        $sql .= " WHERE id = ?";
        $params[] = $id;

        $stmt = $this->db->prepare($sql);
        return $stmt->execute($params);
    }

    public function deactivate($id) {
        $stmt = $this->db->prepare("UPDATE users SET activo = 0 WHERE id = ?");
        return $stmt->execute([$id]);
    }

    public function activate($id) {
        $stmt = $this->db->prepare("UPDATE users SET activo = 1 WHERE id = ?");
        return $stmt->execute([$id]);
    }

    public function getAyudantesActivos() {
        $stmt = $this->db->query("SELECT * FROM users WHERE rol = 'ayudante' AND activo = 1 ORDER BY nombre");
        return $stmt->fetchAll();
    }
}