<?php
namespace Isekai\AIToolbox\Api\AIToolbox;

use ApiBase;
use Isekai\AIToolbox\Api\ApiAIToolbox;
use Isekai\AIToolbox\AIToolboxUtils;
use MediaWiki\MediaWikiServices;
use Wikimedia\ParamValidator\ParamValidator;

class ApiCheckAccess extends ApiBase {
    /** @var MediaWikiServices */
    private $services;

    /** @var ApiAIToolbox */
    private $mParent;

    public function __construct(ApiAIToolbox $main, $method) {
        parent::__construct($main->getMain(), $method);

        $this->mParent = $main;
        $this->services = MediaWikiServices::getInstance();
    }

    public function execute() {
        $userAction = strtolower($this->getParameter('ataction'));
        $tokens = $this->getParameter('tokens');
        $extractLimit = $this->getParameter('extractlines');

        $user = $this->getUser();

        if (!$user->isRegistered()) {
            $this->addError('apierror-isekai-ai-toolbox-nopermission', 'nopermission');
            return false;
        }
        
        $result = $this->getResult();

        $permissionMap = [
            'embeddingpage' => 'ccembeddingpage',
            'chatcomplete' => 'chatcomplete',
        ];

        $permissionManager = $this->services->getPermissionManager();

        $permissionKey = $permissionMap[$userAction] ?? null;
        if ($permissionKey && !$user->isAllowed($permissionKey)) {
            $this->addError('apierror-isekai-ai-toolbox-nopermission', 'nopermission');
            $result->addValue(['aitoolbox', $this->getModuleName()], 'available', false);
            return false;
        }
        
        $noCost = false;
        if ($userAction === 'chatcomplete' && $user->isAllowed('aitoolbox-unlimited')) {
            $noCost = true;
        }

        $isAvailable = true;

        $pointCostData = AIToolboxUtils::getPointCost($userAction, $tokens, $extractLimit);
        if ($pointCostData && !$noCost) {
            list($pointType, $pointCost) = $pointCostData;

            $result->addValue(['aitoolbox', $this->getModuleName()], 'pointtype', $pointType);
            $result->addValue(['aitoolbox', $this->getModuleName()], 'pointcost', $pointCost);

            // Check if user have enough points
            /** @var \Isekai\UserPoints\Service\IsekaiUserPointsFactory */
            $pointFactory = $this->services->getService('IsekaiUserPoints');
            $pointService = $pointFactory->newFromUser($user, $pointType);

            if (!$pointService->hasEnoughPoints($pointCost)) { // User doesn't have enough points
                $this->addError('apierror-isekai-ai-toolbox-notenoughpoints', 'notenoughpoints');
                $isAvailable = false;
            }
        } else {
            $result->addValue(['aitoolbox', $this->getModuleName()], 'pointtype', null);
            $result->addValue(['aitoolbox', $this->getModuleName()], 'pointcost', 0);
        }

        $result->addValue(['aitoolbox', $this->getModuleName()], 'available', $isAvailable);
        
        return true;
    }

    public function getAllowedParams($flags = 0) {
        return [
            'ataction' => [
                ParamValidator::PARAM_TYPE => [
                    'embeddingpage',
                    'chatcomplete',
                ],
                ParamValidator::PARAM_DEFAULT => null,
                ParamValidator::PARAM_REQUIRED => true,
            ],
            'tokens' => [
                ParamValidator::PARAM_TYPE => 'integer',
                ParamValidator::PARAM_DEFAULT => 100,
                ParamValidator::PARAM_REQUIRED => false,
            ],
            'extractlines' => [
                ParamValidator::PARAM_TYPE => 'integer',
                ParamValidator::PARAM_DEFAULT => 5,
                ParamValidator::PARAM_REQUIRED => false,
            ],
        ];
    }

    public function getCacheMode($params) {
		return 'private';
	}

    public function getParent() {
        return $this->mParent;
    }
}