<?php

namespace Colorfield\Mastodon;

/**
 * Class Configuration Value Object.
 *
 * Configuration used by the MastodonOAuth and MastodonAPI classes.
 *
 * @todo validate each setter
 */
class ConfigurationVO
{
	/**
	 * Default instance domain, without the protocol.
	 *
	 * @var string
	 */
	const DEFAULT_INSTANCE = 'mastodon.social';

	/**
	 * Application default name
	 *
	 * @var string
	 */
	const DEFAULT_NAME = 'MastodonAPIPHP';

	/**
	 * Mastodon API version.
	 *
	 * @var string
	 */
	const API_VERSION = 'v1';

	/**
	 * Default URI.
	 *
	 * @var string
	 */
	const DEFAULT_REDIRECT_URIS = 'urn:ietf:wg:oauth:2.0:oob';

	/**
	 * Default website.
	 *
	 * @var string
	 */
	const DEFAULT_WEBSITE = 'https://colorfield.be';

	/**
	 * Default time out.
	 *
	 * @var string
	 */
	const DEFAULT_TIME_OUT = 300;

	/**
	 * Read scope.
	 *
	 * @var string
	 */
	const SCOPE_READ = 'read';

	/**
	 * Write scope.
	 *
	 * @var string
	 */
	const SCOPE_WRITE = 'write';

	/**
	 * Follow scope.
	 *
	 * @var string
	 */
	const SCOPE_FOLLOW = 'follow';

	/**
	 * Base URL.
	 *
	 * Example: https://mastodon.social
	 *
	 * @var string
	 */
	private $baseUrl;

	/**
	 * Mastodon instance domain.
	 *
	 * Example: mastodon.social
	 *
	 * @var string
	 */
	private $mastodonInstance;

	/**
	 * Client name.
	 *
	 * Example: MyMastodonApp.
	 *
	 * @var string
	 */
	private $clientName;

	/**
	 * Client ID obtained during the auth phase.
	 *
	 * @var string
	 */
	private $clientId;

	/**
	 * Client secret obtained during the auth phase.
	 *
	 * @var string
	 */
	private $clientSecret;

	/**
	 * Client bearer obtained during the auth phase.
	 *
	 * @var string
	 */
	private $bearer;

	/**
	 * Redirect URI.
	 *
	 * @var string
	 */
	private $redirectUris;

	/**
	 * Website, with the protocol.
	 *
	 * @var string
	 */
	private $website;

	/**
	 * Authorization code obtained during the auth phase.
	 *
	 * @var string
	 */
	private $authorizationCode;

	/**
	 * Scopes. Possible values: read, write, follow.
	 *
	 * @var string
	 */
	private $scopes;


	/**
	 * ConfigurationVO constructor.
	 *
	 * @todo define default timeout.
	 *
	 * @param string $client_name
	 * @param string $mastodon_instance
	 */
	public function __construct($client_name = self::DEFAULT_NAME, $mastodon_instance = self::DEFAULT_INSTANCE)
	{
		$this->setClientName($client_name);
		$this->setMastodonInstance($mastodon_instance);
		$this->setRedirectUris(self::DEFAULT_REDIRECT_URIS);
		$this->setScopes(['read', 'write']);
		$this->setWebsite(self::DEFAULT_WEBSITE);
		$this->setBaseUrl();
	}


	/**
	 * Initializes the Configuration Value Object with oAuth credentials
	 *
	 * To be used by the MastodonAPI class after authentication.
	 * It should contain the client_id, client_secret and bearer.
	 *
	 * @throws \InvalidArgumentException
	 * @param  array $config
	 */
	public function setOAuthCredentials(array $config)
	{
		if (!isset($config['client_id'])) {
		    throw new \InvalidArgumentException('Missing client_id.');
		}

		// Throw exeception for mandatory params
		if (!isset($config['client_secret'])) {
		    throw new \InvalidArgumentException('Missing client_secret.');
		}

		// Throw exeception for mandatory params
		if (!isset($config['bearer'])) {
		    throw new \InvalidArgumentException('Missing client_secret.');
		}
	}


	/**
	 * Checks if the credentials are already defined.
	 *
	 * @return bool
	 */
	public function hasCredentials()
	{
		return !empty($this->clientId) && !empty($this->clientSecret);
	}


	/**
	 * Returns the app configuration to be used to
	 * get the app authorization credentials (client_id and client_secret).
	 *
	 * @return array
	 */
	public function getAppConfiguration()
	{
		return [
		'client_name'   => $this->getClientName(),
		'redirect_uris' => $this->getRedirectUris(),
		'scopes'        => $this->getScopes(),
		'website'       => $this->getWebsite(),
		];
	}


	/**
	 * Returns the oAuth token configuration to be used to
	 * get the bearer.
	 *
	 * @return array
	 */
	public function getAccessTokenConfiguration()
	{
		return [
		'grant_type'    => 'authorization_code',
		'redirect_uri'  => $this->getRedirectUris(),
		'client_id'     => $this->getClientId(),
		'client_secret' => $this->getClientSecret(),
		'code'          => $this->getAuthorizationCode(),
		];
	}


	/**
	 * Returns the user authentication configuration.
	 *
	 * @param $email
	 * @param $password
	 *
	 * @return array
	 */
	public function getUserAuthenticationConfiguration($email, $password)
	{
		return [
		'grant_type'    => 'password',
		'client_id'     => $this->getClientId(),
		'client_secret' => $this->getClientSecret(),
		'username'      => $email,
		'password'      => $password,
		'scope'         => $this->getScopes(),
		];
	}


	/**
	 * @return array
	 */
	public function getScopes()
	{
		return implode(' ', $this->scopes);
	}


	/**
	 * @param array $scopes
	 */
	public function setScopes(array $scopes)
	{
		if (!empty($scopes)) {
		    $scopeValues = [self::SCOPE_READ, self::SCOPE_WRITE, self::SCOPE_FOLLOW];
		    // Check scope values
		    if (count(array_intersect($scopes, $scopeValues)) == count($scopes)) {
		        $this->scopes = $scopes;
		    }
		    else {
		        throw new \InvalidArgumentException('Wrong scopes defined, expected one ore many from read write follow. See README.');
		    }
		}
	}


	/**
	 * @return string
	 */
	public function getBaseUrl()
	{
		return $this->baseUrl;
	}


	/**
	 * Set the base url, enforces https.
	 */
	private function setBaseUrl()
	{
		$result = "https://{$this->getMastodonInstance()}";
		$this->baseUrl = $result;
	}


	/**
	 * @return string
	 */
	public function getMastodonInstance()
	{
		return $this->mastodonInstance;
	}


	/**
	 * @param string $instanceName
	 */
	public function setMastodonInstance($instance)
	{
		$this->mastodonInstance = $instance;
	}


	/**
	 * @return string
	 */
	public function getClientName()
	{
		return $this->clientName;
	}


	/**
	 * @param string $clientName
	 */
	public function setClientName($clientName)
	{
		$this->clientName = $clientName;
	}


	/**
	 * @return string
	 */
	public function getClientId()
	{
		return $this->clientId;
	}


	/**
	 * @param string $clientId
	 */
	public function setClientId($clientId)
	{
		$this->clientId = $clientId;
	}


	/**
	 * @return string
	 */
	public function getClientSecret()
	{
		return $this->clientSecret;
	}


	/**
	 * @param string $clientSecret
	 */
	public function setClientSecret($clientSecret)
	{
		$this->clientSecret = $clientSecret;
	}


	/**
	 * @return string
	 */
	public function getBearer()
	{
		return $this->bearer;
	}


	/**
	 * @param string $bearer
	 */
	public function setBearer($bearer)
	{
		$this->bearer = $bearer;
	}


	/**
	 * @return mixed
	 */
	public function getRedirectUris()
	{
		return $this->redirectUris;
	}


	/**
	 * @param mixed $redirectUri
	 */
	public function setRedirectUris($redirectUris)
	{
		$this->redirectUris = $redirectUris;
	}


	/**
	 * @return mixed
	 */
	public function getWebsite()
	{
		return $this->website;
	}


	/**
	 * @param mixed $website
	 */
	public function setWebsite($website)
	{
		if(!empty($website)) {
		    // @todo validation
		    $this->website = $website;
		}
	}


	/**
	 * @return string
	 */
	public function getAuthorizationCode()
	{
		return $this->authorizationCode;
	}


	/**
	 * @param array $token
	 */
	public function setAuthorizationCode($code)
	{
		$this->authorizationCode = $code;
	}
}
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