<?php
require_once __DIR__ . '/../db/config.php';

header('Content-Type: application/json');

// Run migrations first
run_migrations();

$response = [
    'success' => false,
    'message' => 'Invalid request'
];

function get_last_status($pdo, $employee_id) {
    $stmt = $pdo->prepare("SELECT * FROM time_records WHERE employee_id = ? ORDER BY id DESC LIMIT 1");
    $stmt->execute([$employee_id]);
    return $stmt->fetch(PDO::FETCH_ASSOC);
}

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $data = json_decode(file_get_contents('php://input'), true);
    $action = $data['action'] ?? null;
    $employee_id = $data['employee_id'] ?? null;

    if ($action && $employee_id) {
        try {
            $pdo = db();
            $last_record = get_last_status($pdo, $employee_id);

            if ($action === 'clock_in') {
                if ($last_record && $last_record['clock_out'] === null) {
                    $response['message'] = 'Ya has fichado la entrada. Debes fichar la salida primero.';
                } else {
                    $stmt = $pdo->prepare("INSERT INTO time_records (employee_id, clock_in) VALUES (?, NOW())");
                    $stmt->execute([$employee_id]);
                    $response['success'] = true;
                    $response['message'] = 'Entrada registrada con éxito.';
                    $response['status'] = 'Fichado a las ' . date('H:i:s');
                    $response['action'] = 'clock_in';
                }
            } elseif ($action === 'clock_out') {
                if (!$last_record || $last_record['clock_out'] !== null) {
                    $response['message'] = 'No has fichado la entrada. Debes fichar la entrada primero.';
                } else {
                    $stmt = $pdo->prepare("UPDATE time_records SET clock_out = NOW() WHERE id = ?");
                    $stmt->execute([$last_record['id']]);
                    $response['success'] = true;
                    $response['message'] = 'Salida registrada con éxito.';
                    $response['status'] = 'Salida registrada a las ' . date('H:i:s');
                     $response['action'] = 'clock_out';
                }
            } else {
                $response['message'] = 'Acción no válida.';
            }
        } catch (PDOException $e) {
            $response['message'] = 'Error de base de datos: ' . $e->getMessage();
        }
    } else {
        $response['message'] = 'Faltan datos en la solicitud.';
    }
} elseif ($_SERVER['REQUEST_METHOD'] === 'GET') {
    $employee_id = $_GET['employee_id'] ?? null;
    if ($employee_id) {
        try {
            $pdo = db();
            $last_record = get_last_status($pdo, $employee_id);
            if ($last_record) {
                if($last_record['clock_out'] === null) {
                    $response['status'] = 'Fichado a las ' . date('H:i:s', strtotime($last_record['clock_in']));
                    $response['last_action'] = 'clock_in';
                } else {
                    $response['status'] = 'Salida registrada a las ' . date('H:i:s', strtotime($last_record['clock_out']));
                    $response['last_action'] = 'clock_out';
                }
            } else {
                 $response['status'] = 'Listo para fichar la entrada.';
                 $response['last_action'] = 'clock_out';
            }
             $response['success'] = true;
        } catch (PDOException $e) {
            $response['message'] = 'Error de base de datos: ' . $e->getMessage();
        }
    }
}

echo json_encode($response);