<?php

// SPDX-License-Identifier: EUPL-1.2

declare(strict_types=1);

namespace Core\Mcp\Resources;

use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Schema;
use Laravel\Mcp\Request;
use Laravel\Mcp\Response;
use Laravel\Mcp\Server\Resource;

final class DatabaseSchema extends Resource
{
    protected string $description = 'Database schema information for Host Hub';

    public function handle(Request $request): Response
    {
        $schema = [];

        foreach ($this->tables() as $tableName) {
            $schema[$tableName] = $this->describeTable($tableName);
        }

        return Response::text((string) json_encode($schema, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES));
    }

    protected function tables(): array
    {
        try {
            return collect(DB::select('SHOW TABLES'))
                ->map(static fn (object $row): string => (string) array_values((array) $row)[0])
                ->all();
        } catch (\Throwable) {
            return Schema::getTableListing();
        }
    }

    protected function describeTable(string $tableName): array
    {
        $driver = DB::getDriverName();

        try {
            return array_map(static fn (object $column): array => (array) $column, DB::select(sprintf(
                $driver === 'sqlite' ? 'PRAGMA table_info("%s")' : 'DESCRIBE `%s`',
                $tableName,
            )));
        } catch (\Throwable) {
            return [];
        }
    }
}