<?php

declare(strict_types=1);

namespace App\Controllers;

use App\Libraries\Mongo;
use App\Models\GameModel;
use CodeIgniter\Controller;

class Api extends Controller
{
    public function suggest(): \CodeIgniter\HTTP\ResponseInterface
    {
        $q = trim((string) service('request')->getGet('q'));
        if (mb_strlen($q) < 2) {
            return service('response')->setJSON([]);
        }

        return service('response')->setJSON((new GameModel())->suggest($q));
    }

    /**
     * Game Prices API: lowest price by Steam App ID.
     * GET /api/prices?appid=1245620
     */
    public function prices(): \CodeIgniter\HTTP\ResponseInterface
    {
        $appid = (int) service('request')->getGet('appid');
        if ($appid <= 0) {
            return service('response')->setStatusCode(400)->setJSON([
                'error'   => 'bad_request',
                'message' => 'Missing or invalid "appid" query parameter.',
            ]);
        }

        // appid map is in the CrawlCovers command; reuse via a public map.
        $game = (new GameModel())->findByAppId($appid);
        if ($game === null) {
            return service('response')->setStatusCode(404)->setJSON([
                'error'   => 'not_found',
                'message' => "No game found for Steam App ID {$appid}.",
            ]);
        }

        return service('response')->setJSON([
            'game' => [
                'title'          => $game['title'],
                'slug'           => $game['slug'],
                'url'            => '/game/' . $game['slug'],
                'steam_appid'    => $appid,
                'regular_price'  => (float) $game['base_price'],
                'best_official'  => [
                    'price' => (float) $game['best_official']['price'],
                    'store' => $game['best_official']['store'],
                    'cut'   => (int) $game['best_official']['cut'],
                ],
                'best_keyshop'   => [
                    'price' => (float) $game['best_keyshop']['price'],
                    'store' => $game['best_keyshop']['store'],
                    'cut'   => (int) $game['best_keyshop']['cut'],
                ],
                'all_time_low'   => [
                    'price' => (float) $game['all_time_low']['price'],
                    'store' => $game['all_time_low']['store'],
                    'date'  => $game['all_time_low']['date'] instanceof \MongoDB\BSON\UTCDateTime
                        ? $game['all_time_low']['date']->toDateTime()->format('Y-m-d')
                        : null,
                ],
                'active_deals'   => (int) $game['active_deals'],
                'metacritic'     => (int) $game['score'],
            ],
        ]);
    }

    /**
     * API documentation page data (regions, endpoints).
     */
    public function docs(): string
    {
        $model = new GameModel();

        $data = [
            'pageTitle' => 'GG.deals API — Game Deals, Bundles and Prices API',
            'stats'     => $model->stats(),
        ];

        return view('api', $data);
    }
}