<?php

use MintyPHP\Buffer;
use MintyPHP\Support\Flash;
use MintyPHP\Support\Guard;
use MintyPHP\Router;
use MintyPHP\Service\DepartmentService;
use MintyPHP\Repository\TenantDepartmentRepository;
use MintyPHP\Service\TenantService;
use MintyPHP\Service\UserService;
use MintyPHP\Service\SettingService;
use MintyPHP\Service\PermissionService;
use MintyPHP\Service\TenantScopeService;

Guard::requireLogin();
Guard::requirePermissionOrForbidden(PermissionService::DEPARTMENTS_VIEW);

$currentUserId = (int) ($_SESSION['user']['id'] ?? 0);
if ($currentUserId > 0) {
    PermissionService::getUserPermissions($currentUserId);
}
$allowedTenantIds = TenantScopeService::getUserTenantIds($currentUserId);

$uuid = trim((string) ($id ?? ''));
$department = $uuid !== '' ? DepartmentService::findByUuid($uuid) : null;
if (!$department) {
    Flash::error('Department not found', 'admin/departments', 'department_not_found');
    Router::redirect('admin/departments');
}

$departmentId = (int) ($department['id'] ?? 0);
if (!TenantScopeService::canAccess('departments', $departmentId, $currentUserId)) {
    Router::redirect('error/forbidden');
    return;
}
$creatorId = (int) ($department['created_by'] ?? 0);
if ($creatorId > 0) {
    $creator = UserService::findById($creatorId);
    if ($creator) {
        $creatorName = trim(($creator['first_name'] ?? '') . ' ' . ($creator['last_name'] ?? ''));
        $department['created_by_label'] = $creatorName !== '' ? $creatorName : ($creator['email'] ?? '');
        $department['created_by_uuid'] = $creator['uuid'] ?? null;
    }
}
$modifierId = (int) ($department['modified_by'] ?? 0);
if ($modifierId > 0) {
    $modifier = UserService::findById($modifierId);
    if ($modifier) {
        $modifierName = trim(($modifier['first_name'] ?? '') . ' ' . ($modifier['last_name'] ?? ''));
        $department['modified_by_label'] = $modifierName !== '' ? $modifierName : ($modifier['email'] ?? '');
        $department['modified_by_uuid'] = $modifier['uuid'] ?? null;
    }
}

$errors = [];
$form = $department;
$tenants = TenantService::list();
$selectedTenantIds = TenantDepartmentRepository::listTenantIdsByDepartmentId($departmentId);
if ($allowedTenantIds) {
    $tenants = array_values(array_filter($tenants, static function (array $tenant) use ($allowedTenantIds): bool {
        $tenantId = (int) ($tenant['id'] ?? 0);
        return $tenantId > 0 && in_array($tenantId, $allowedTenantIds, true);
    }));
    $selectedTenantIds = array_values(array_intersect($selectedTenantIds, $allowedTenantIds));
} elseif (TenantScopeService::isStrict()) {
    $tenants = [];
    $selectedTenantIds = [];
}

if (isset($_POST['description'])) {
    if (!PermissionService::userHas($currentUserId, PermissionService::DEPARTMENTS_UPDATE)) {
        Router::redirect('error/forbidden');
        return;
    }
    $result = DepartmentService::updateFromAdmin($departmentId, $_POST, $currentUserId);
    $form = $result['form'] ?? $form;
    $errors = $result['errors'] ?? [];
    $tenantIds = $_POST['tenant_ids'] ?? [];
    if (!is_array($tenantIds)) {
        $tenantIds = [$tenantIds];
    }
    $selectedTenantIds = array_values(array_unique(array_map('intval', $tenantIds)));
    $selectedTenantIds = TenantScopeService::filterTenantIdsForUser($selectedTenantIds, $currentUserId);

    if (TenantScopeService::isStrict() && !$selectedTenantIds) {
        $errors[] = t('Please select at least one tenant');
    }

    if (($result['ok'] ?? false) && !$errors) {
        $existingTenantIds = TenantDepartmentRepository::listTenantIdsByDepartmentId($departmentId);
        $finalTenantIds = TenantScopeService::mergeTenantIdsPreservingOutOfScope(
            $selectedTenantIds,
            $existingTenantIds,
            $allowedTenantIds
        );
        $cleaned = DepartmentService::syncTenants($departmentId, $finalTenantIds);
        $action = (string) ($_POST['action'] ?? 'save');
        if ($cleaned > 0) {
            Flash::info(t('Department assignments cleaned: %d', $cleaned), "admin/departments/edit/{$uuid}", 'department_assignments_cleaned');
        }
        if ($action === 'save_close') {
            Flash::success('Department updated', 'admin/departments', 'department_updated');
            Router::redirect('admin/departments');
        } else {
            Flash::success('Department updated', "admin/departments/edit/{$uuid}", 'department_updated');
            Router::redirect("admin/departments/edit/{$uuid}");
        }
    }
}

Buffer::set('title', t('Edit department'));