<?php

declare(strict_types=1);

namespace App\Api;

use App\Controller\HealthController;
use App\Controller\StatsController;
use App\Http\HttpRequest;
use App\Http\JsonResponse;
use App\Tools\AnalyzeOfflineOrdersTool;
use App\Tools\MerchantRankingTool;
use App\Tools\OrderSummaryTool;

final readonly class ApiKernel
{
    public function __construct(
        private HealthController $healthController,
        private StatsController $statsController,
    ) {
    }

    public function handle(HttpRequest $request): void
    {
        try {
            match ($request->path) {
                '/', '/health' => $this->ok($this->healthController->show()),
                '/tools' => $this->ok($this->tools()),
                '/api/order-summary' => $this->post($request, fn (): array => $this->statsController->orderSummary($request)),
                '/api/offline-stats' => $this->post($request, fn (): array => $this->statsController->offlineStats($request)),
                '/api/merchant-ranking' => $this->post($request, fn (): array => $this->statsController->merchantRanking($request)),
                default => JsonResponse::send([
                    'success' => false,
                    'error' => [
                        'code' => 'not_found',
                        'message' => 'API route not found.',
                    ],
                ], 404),
            };
        } catch (\Throwable $exception) {
            JsonResponse::send([
                'success' => false,
                'error' => [
                    'code' => 'server_error',
                    'message' => $exception->getMessage(),
                ],
            ], 500);
        }
    }

    /**
     * @param \Closure(): array<string, mixed> $handler
     */
    private function post(HttpRequest $request, \Closure $handler): void
    {
        if ($request->method !== 'POST') {
            JsonResponse::send([
                'success' => false,
                'error' => [
                    'code' => 'method_not_allowed',
                    'message' => 'This endpoint only supports POST.',
                ],
            ], 405);

            return;
        }

        $this->ok($handler());
    }

    /**
     * @param array<string, mixed> $data
     */
    private function ok(array $data): void
    {
        JsonResponse::send([
            'success' => true,
            'data' => $data,
        ]);
    }

    /**
     * @return array<string, mixed>
     */
    private function tools(): array
    {
        return [
            'tools' => [
                [
                    'name' => OrderSummaryTool::NAME,
                    'description' => OrderSummaryTool::DESCRIPTION,
                    'method' => 'POST',
                    'path' => '/api/order-summary',
                    'inputSchema' => OrderSummaryTool::inputSchema(),
                ],
                [
                    'name' => AnalyzeOfflineOrdersTool::NAME,
                    'description' => AnalyzeOfflineOrdersTool::DESCRIPTION,
                    'method' => 'POST',
                    'path' => '/api/offline-stats',
                    'inputSchema' => AnalyzeOfflineOrdersTool::inputSchema(),
                ],
                [
                    'name' => MerchantRankingTool::NAME,
                    'description' => MerchantRankingTool::DESCRIPTION,
                    'method' => 'POST',
                    'path' => '/api/merchant-ranking',
                    'inputSchema' => MerchantRankingTool::inputSchema(),
                ],
            ],
        ];
    }
}