<?php
namespace Mince;

use InvalidArgumentException;
use RuntimeException;
use Index\Http\Routing\{RouteHandler,HttpGet,HttpMiddleware,HttpPost};
use Index\Security\CSRFP;
use Ramsey\Uuid\Uuid;
use Sasae\SasaeEnvironment;

class ClientsRoutes extends RouteHandler {
    public function __construct(
        private SasaeEnvironment $templating,
        private AccountLinks $accountLinks,
        private Authorisations $authorisations,
        private Verifications $verifications,
        private CSRFP $csrfp,
        private object $authInfo
    ) {}

    #[HttpMiddleware('/clients')]
    public function verifyRequest($response, $request) {
        if(!$this->authInfo->success)
            return 403;

        if($request->getMethod() === 'POST') {
            if(!$request->isFormContent())
                return 400;
            $body = $request->getContent();

            if(!$body->hasParam('csrfp') || !$this->csrfp->verifyToken((string)$body->getParam('csrfp')))
                return 403;
        }
    }

    private const CLIENTS_ERRORS = [
        'link' => [
            'already' => 'You already have a linked Minecraft username, unlink the other one first.',
            'format' => 'The Link Code you entered was is not in the correct format, check your input!',
            'code' => 'The Link Code you entered is not valid, make sure you typed it correctly!',
        ],
    ];

    #[HttpGet('/clients')]
    public function getClients($response, $request) {
        $template = $this->templating->load('clients/index');

        $errorCode = (string)$request->getParam('error');
        if($errorCode !== '') {
            $errorCode = explode(':', $errorCode, 2);
            if(count($errorCode) === 2
                && array_key_exists($errorCode[0], self::CLIENTS_ERRORS)
                && array_key_exists($errorCode[1], self::CLIENTS_ERRORS[$errorCode[0]]))
                $template->setVars([
                    'error' => [
                        'section' => $errorCode[0],
                        'code' => $errorCode[1],
                        'message' => self::CLIENTS_ERRORS[$errorCode[0]][$errorCode[1]],
                    ],
                ]);
        }

        try {
            $linkInfo = $this->accountLinks->getLink(userInfo: $this->authInfo->user_id);
            $clients = iterator_to_array($this->authorisations->getAuthorisations($linkInfo));

            $template->setVars([
                'link' => $linkInfo,
                'clients' => $clients,
            ]);
        } catch(RuntimeException $ex) {}

        return $template;
    }

    #[HttpPost('/clients/link')]
    public function postLink($response, $request) {
        if($this->accountLinks->checkHasLink($this->authInfo->user_id)) {
            $response->redirect('/clients?error=link:already');
            return;
        }

        $body = $request->getContent();
        $code = (string)$body->getParam('code');
        if(strlen($code) !== 10) {
            $response->redirect('/clients?error=link:format');
            return;
        }

        $code = strtr(strtoupper($code), '0189', 'OIBG');

        try {
            $verifyInfo = $this->verifications->getVerification(code: $code);
        } catch(RuntimeException $ex) {
            $response->redirect('/clients?error=link:code');
            return;
        }

        $this->verifications->deleteVerification($verifyInfo);
        $this->accountLinks->createLink($this->authInfo->user_id, $verifyInfo);
        $this->authorisations->createAuthorisation($verifyInfo, grant: true);

        $response->redirect('/clients');
    }

    #[HttpPost('/clients/unlink')]
    public function postUnlink($response) {
        $this->accountLinks->deleteLink(userInfo: $this->authInfo->user_id);
        $response->redirect('/clients');
    }

    #[HttpPost('/clients/authorise')]
    public function postAuthorise($response, $request) {
        $body = $request->getContent();
        $authId = (string)$body->getParam('auth');
        if(empty($authId))
            return 404;

        try {
            $linkInfo = $this->accountLinks->getLink(userInfo: $this->authInfo->user_id);
        } catch(RuntimeException $ex) {
            return 403;
        }

        try {
            $authInfo = $this->authorisations->getAuthorisation(authId: $authId);
        } catch(RuntimeException $ex) {
            return 403;
        }

        if($authInfo->getUUIDRaw() !== $linkInfo->getUUIDRaw())
            return 403;
        if($authInfo->isGranted())
            return 404;

        $this->authorisations->setAuthorisationGranted($authInfo);

        $response->redirect('/clients');
    }

    #[HttpPost('/clients/deauthorise')]
    public function postDeauthorise($response, $request) {
        $body = $request->getContent();
        $authId = (string)$body->getParam('auth');
        if(empty($authId))
            return 404;

        try {
            $linkInfo = $this->accountLinks->getLink(userInfo: $this->authInfo->user_id);
        } catch(RuntimeException $ex) {
            return 403;
        }

        if($authId === 'all') {
            $this->authorisations->deleteAuthorisations(uuid: $linkInfo);
        } elseif($authId === 'pending') {
            $this->authorisations->deleteAuthorisations(uuid: $linkInfo, pending: true);
        } else {
            try {
                $authInfo = $this->authorisations->getAuthorisation(authId: $authId);
            } catch(RuntimeException $ex) {
                return 403;
            }

            if($authInfo->getUUIDRaw() !== $linkInfo->getUUIDRaw())
                return 403;

            $this->authorisations->deleteAuthorisations(authInfo: $authInfo);
        }

        $response->redirect('/clients');
    }
}