<?php

namespace App\Services\TenantBootstrap\Steps;

use App\Services\TenantBootstrap\Contracts\TenantBootstrapStep;
use Illuminate\Support\Facades\DB;

class MenusStep implements TenantBootstrapStep
{
    public function key(): string
    {
        return 'menus_seed';
    }

    public function run(int $tenantId): void
    {
        if (! DB::getSchemaBuilder()->hasTable('menus')) {
            return;
        }

        // Check if tenant already has menus
        $exists = DB::table('menus')->where('tenant_id', $tenantId)->exists();
        if ($exists) {
            return;
        }

        // Get all global menus ordered by parent_id, sort_order
        // Order by: root menus first (parent_id IS NULL), then by parent_id ASC, then sort_order ASC
        $globalMenus = DB::table('menus')
            ->whereNull('tenant_id')
            ->orderByRaw('parent_id IS NULL DESC, parent_id ASC, sort_order ASC')
            ->get();

        if ($globalMenus->isEmpty()) {
            return;
        }

        $parentIdMap = []; // old_id => new_id mapping

        foreach ($globalMenus as $menu) {
            // Map parent_id: if parent exists in map, use new parent_id, else null
            $newParentId = null;
            if ($menu->parent_id !== null && isset($parentIdMap[$menu->parent_id])) {
                $newParentId = $parentIdMap[$menu->parent_id];
            }

            // Insert new menu for tenant
            $newId = DB::table('menus')->insertGetId([
                'tenant_id' => $tenantId,
                'parent_id' => $newParentId,
                'name' => $menu->name,
                'icon' => $menu->icon ?? null,
                'url' => $menu->url ?? null,
                'sort_order' => $menu->sort_order ?? 0,
                'is_active' => $menu->is_active ?? 1,
                'hidden' => $menu->hidden ?? 0,
                'is_external' => $menu->is_external ?? 0,
                'external_url' => $menu->external_url ?? null,
                'created_at' => now(),
                'updated_at' => now(),
            ]);

            // Store mapping for children menus
            $parentIdMap[$menu->id] = $newId;
        }
    }
}