<?php

use Oauth2\Authentication\Database;

class OAuthdb implements Database
{
    private $sessions = array();
    private $sessions_client_type_id = array();
    private $sessions_code = array();
    private $session_scopes = array();

    private $clients = array(0 => array(
        'client_id' =>  'test',
        'client_secret' =>  'test',
        'redirect_uri'  =>  'http://example.com/test',
        'name'  =>  'Test Client'
    ));

    private $scopes = array('test' => array(
        'id'    =>  1,
        'scope' =>  'test',
        'name'  =>  'test',
        'description'   =>  'test'
    ));

    public function validateClient($clientId, $clientSecret = null, $redirectUri = null)
    {
        if ($clientId !== $this->clients[0]['client_id']) {
            return false;
        }

        if ($clientSecret !== null && $clientSecret !== $this->clients[0]['client_secret']) {
            return false;
        }

        if ($redirectUri !== null && $redirectUri !== $this->clients[0]['redirect_uri']) {
            return false;
        }

        return $this->clients[0];
    }

    public function newSession($clientId, $redirectUri, $type = 'user', $typeId = null, $authCode = null, $accessToken = null, $accessTokenExpire = null, $stage = 'requested')
    {
        $id = count($this->sessions);

        $this->sessions[$id] = array(
            'id'    =>  $id,
            'client_id' =>  $clientId,
            'redirect_uri'  =>  $redirectUri,
            'owner_type'    =>  $type,
            'owner_id'  =>  $typeId,
            'auth_code' =>  $authCode,
            'access_token'  =>  $accessToken,
            'access_token_expire'   =>  $accessTokenExpire,
            'stage' =>  $stage
        );

        $this->sessions_client_type_id[$clientId . ':' . $type . ':' . $typeId] = $id;
        $this->sessions_code[$clientId . ':' . $redirectUri . ':' . $authCode] = $id;

        return $id;
    }

    public function updateSession($sessionId, $authCode = null, $accessToken = null, $accessTokenExpire = null, $stage = 'requested')
    {
        $this->sessions[$sessionId]['auth_code'] = $authCode;
        $this->sessions[$sessionId]['access_token'] = $accessToken;
        $this->sessions[$sessionId]['access_token_expire'] = $accessTokenExpire;
        $this->sessions[$sessionId]['stage'] = $stage;

        return true;
    }

    public function deleteSession($clientId, $type, $typeId)
    {
        $key = $clientId . ':' . $type . ':' . $typeId;
        if (isset($this->sessions_client_type_id[$key])) {
            unset($this->sessions[$this->sessions_client_type_id[$key]]);
        }
        return true;
    }

    public function validateAuthCode($clientId, $redirectUri, $authCode)
    {
        $key = $clientId . ':' . $redirectUri . ':' . $authCode;

        if (isset($this->sessions_code[$key])) {
            return $this->sessions[$this->sessions_code[$key]];
        }

        return false;
    }

    public function hasSession($type, $typeId, $clientId)
    {
        die('not implemented hasSession');
    }

    public function getAccessToken($sessionId)
    {
        die('not implemented getAccessToken');
    }

    public function removeAuthCode($sessionId)
    {
        die('not implemented removeAuthCode');
    }

    public function setAccessToken($sessionId, $accessToken)
    {
        die('not implemented setAccessToken');
    }

    public function addSessionScope($sessionId, $scope)
    {
        if ( ! isset($this->session_scopes[$sessionId])) {
            $this->session_scopes[$sessionId] = array();
        }

        $this->session_scopes[$sessionId][] = $scope;

        return true;
    }

    public function getScope($scope)
    {
        if ( ! isset($this->scopes[$scope])) {
            return false;
        }

        return $this->scopes[$scope];
    }

    public function updateSessionScopeAccessToken($sessionId, $accessToken)
    {
        return true;
    }

    public function accessTokenScopes($accessToken)
    {
        die('not implemented accessTokenScopes');
    }
}