<?php
/**
 * Audit Log / Activity History
 * GET /v1/audit-log
 * Returns paginated activity history
 */

use App\Core\Database;
use App\Middleware\AuthMiddleware;

$decoded = AuthMiddleware::check();
$db = Database::getInstance();

$tenantId = $decoded['tenant_id'];
$role = $decoded['role'];
$page = max(1, (int)($_GET['page'] ?? 1));
$limit = min(50, max(10, (int)($_GET['limit'] ?? 20)));
$offset = ($page - 1) * $limit;
$entityType = $_GET['entity_type'] ?? null;
$action = $_GET['action'] ?? null;

$where = [];
$params = [];

if ($role !== 'super_admin') {
    $where[] = 'a.tenant_id = ?';
    $params[] = $tenantId;
}

if ($entityType) {
    $where[] = 'a.entity_type = ?';
    $params[] = $entityType;
}

if ($action) {
    $where[] = 'a.action LIKE ?';
    $params[] = "%$action%";
}

$whereClause = $where ? 'WHERE ' . implode(' AND ', $where) : '';

// Total count
$countStmt = $db->prepare("SELECT COUNT(*) FROM audit_log a $whereClause");
$countStmt->execute($params);
$total = $countStmt->fetchColumn();

// Fetch logs
$params[] = $limit;
$params[] = $offset;

$stmt = $db->prepare("
    SELECT a.*, u.name as user_name 
    FROM audit_log a
    LEFT JOIN users u ON a.user_id = u.id
    $whereClause
    ORDER BY a.created_at DESC
    LIMIT ? OFFSET ?
");
$stmt->execute($params);
$logs = $stmt->fetchAll();

// Format logs
foreach ($logs as &$log) {
    $log['details'] = json_decode($log['details'] ?? '{}', true);
    $log['old_values'] = json_decode($log['old_values'] ?? '{}', true);
    
    // Generate human-readable summary
    $log['summary'] = match(true) {
        str_starts_with($log['action'], 'invoice.') => _invoiceSummary($log),
        str_starts_with($log['action'], 'user.') => _userSummary($log),
        str_starts_with($log['action'], 'company.') => _companySummary($log),
        str_starts_with($log['action'], 'payment.') => _paymentSummary($log),
        default => $log['action'],
    };
}
unset($log);

json_success([
    'logs' => $logs,
    'pagination' => [
        'page' => $page,
        'limit' => $limit,
        'total' => (int)$total,
        'pages' => ceil($total / $limit),
    ],
]);

function _invoiceSummary(array $log): string {
    return match($log['action']) {
        'invoice.approved' => 'تم اعتماد فاتورة',
        'invoice.updated' => 'تم تعديل فاتورة',
        'invoice.bulk_approved' => 'اعتماد جماعي',
        'invoice.uploaded' => 'تم رفع فاتورة',
        'invoice.extracted' => 'تم استخراج بيانات فاتورة',
        default => $log['action'],
    };
}

function _userSummary(array $log): string {
    return match($log['action']) {
        'user.created' => 'تم إنشاء مستخدم جديد',
        'user.updated' => 'تم تعديل بيانات مستخدم',
        'user.deleted' => 'تم حذف مستخدم',
        'user.login' => 'تسجيل دخول',
        default => $log['action'],
    };
}

function _companySummary(array $log): string {
    return match($log['action']) {
        'company.created' => 'تم إنشاء شركة جديدة',
        'company.updated' => 'تم تعديل بيانات شركة',
        default => $log['action'],
    };
}

function _paymentSummary(array $log): string {
    return match($log['action']) {
        'payment.created' => 'تم إنشاء طلب دفع',
        'payment.uploaded' => 'تم رفع وصل دفع',
        'payment.approved' => 'تم اعتماد دفعة',
        default => $log['action'],
    };
}