<?php
/**
 * api.php
 * FKI Asset System RESTful API
 */

require_once 'config.php';

header('Content-Type: application/json; charset=utf-8');

$action = $_GET['action'] ?? '';

try {
    switch ($action) {
        case 'get_dashboard_stats':
            // Laptops
            $laptop_total = $db->query("SELECT COUNT(*) FROM laptop_assets")->fetchColumn();
            $laptop_assigned = $db->query("SELECT COUNT(*) FROM laptop_assets WHERE status = 'assigned'")->fetchColumn();

            // Cards
            $card_total = $db->query("SELECT COUNT(*) FROM access_cards")->fetchColumn();
            $card_assigned = $db->query("SELECT COUNT(*) FROM access_cards WHERE status = 'assigned'")->fetchColumn();

            // MFP
            $mfp_total = $db->query("SELECT COUNT(*) FROM mfp_accounts")->fetchColumn();
            $mfp_active = $db->query("SELECT COUNT(*) FROM mfp_accounts WHERE status = 'active'")->fetchColumn();

            // Users
            $users_general = $db->query("SELECT COUNT(*) FROM users WHERE accounting_type = '일반회계'")->fetchColumn();
            $users_special = $db->query("SELECT COUNT(*) FROM users WHERE accounting_type = '특별회계'")->fetchColumn();

            echo json_encode([
                'laptops' => ['total' => (int) $laptop_total, 'assigned' => (int) $laptop_assigned],
                'cards' => ['total' => (int) $card_total, 'assigned' => (int) $card_assigned],
                'mfp' => ['total' => (int) $mfp_total, 'assigned' => (int) $mfp_active],
                'users' => ['general' => (int) $users_general, 'special' => (int) $users_special]
            ]);
            break;

        case 'get_users':
            $query = "SELECT u.*, d.name as dept_name FROM users u LEFT JOIN departments d ON u.department_id = d.id";
            $search = $_GET['search'] ?? '';
            if ($search) {
                $query .= " WHERE u.name LIKE :search OR u.emp_id LIKE :search OR u.email LIKE :search";
                $stmt = $db->prepare($query);
                $stmt->execute(['search' => "%$search%"]);
            } else {
                $stmt = $db->query($query);
            }
            echo json_encode($stmt->fetchAll());
            break;

        case 'get_laptops':
            $query = "SELECT a.*, m.model_name, m.manufacturer, u.name as user_name 
                      FROM laptop_assets a 
                      LEFT JOIN laptop_models m ON a.model_id = m.id 
                      LEFT JOIN users u ON a.current_user_id = u.id";
            echo json_encode($db->query($query)->fetchAll());
            break;

        default:
            echo json_encode(['error' => 'Invalid action']);
            break;
    }
} catch (Exception $e) {
    http_response_code(500);
    echo json_encode(['error' => $e->getMessage()]);
}