<?php

	namespace api\module;
	use \database\core\DatabaseDriver;
	use \manager\sessionManager;
	use \error\core\Error;
	use \error\core\Err;
	use \database\core\Repo;
	use \api\core\Request;

	class machineDefault{

		public function __construct(){}
		public function __destruct(){}


		/* CREATION D'UNE NOUVELLE MACHINE DANS LA BDD
		*
		* @name<String> 										Identifiant de la machine
		*
		* @return status<Boolean> 								Retourne si oui ou non, tout s'est bien passe
		*
		*/
		public function create($params){
			extract($params);

			/* [1] Vérification unicité (name)
			=========================================================*/
			/* (1) Check if unique : name */
			$byName_r = new Repo('machine/getByName', [$_SESSION['WAREHOUSE']['id'], $name]);
			$byName = $byName_r->answer();

			/* (2) If already used -> error */
			if( $byName != false )
				return ['error' => new Error(Err::AlreadyExists, 'name')];


			/* [2] Creation de la machine
			=========================================================*/
			$create_machine = new Repo('machine/create', [
				$_SESSION['WAREHOUSE']['id'],
				$name
			]);
			$id_machine = $create_machine->answer();

			// Si une erreur est retournee, on retourne une erreur
			if( $id_machine === false )
				return ['error' => new Error(Err::ModuleError)];


			/* [3] Gestion du retour
			=========================================================*/
			return [
				'id_machine'  => $id_machine
			];
		}


		/* AJOUTE UNE MACHINE DONNEE A UN GROUPE DONNE
		*
		* @id_cluster<int> 										UID du groupe
		* @id_machine<int> 										UID de la machine
		*
		* @return association<int>	 							Renvoie l'UID de l'association cree
		* 														Renvoie FALSE si une erreur occure
		*
		*/
		public function link($params){
			extract($params);

			/* Creation de l'association */
			$link_machine = new Repo('machine_cluster/link', [
				$_SESSION['WAREHOUSE']['id'],
				$id_cluster,
				$id_machine
			]);

			/* (1) On retourne l'erreur du repo */
			return [ 'error' => $link_machine->answer() ];
		}


		/* RETIRE UNE MACHINE DONNEE A UN GROUPE DONNE
		*
		* @id_cluster<int> 										UID du groupe
		* @id_machine<int> 										UID de la machine
		*
		* @return association<int>	 							Renvoie l'UID de l'association cree
		* 														Renvoie FALSE si une erreur occure
		*
		*/
		public function unlink($params){
			extract($params);

			/* Suppression de l'association */
			$link_machine = new Repo('machine_cluster/unlink', [
				$_SESSION['WAREHOUSE']['id'],
				$id_cluster,
				$id_machine
			]);

			/* (1) On retourne l'erreur du repo */
			return [ 'error' => $link_machine->answer() ];
		}


		/* RENVOIE UNE MACHINE EN FONCTION D'UN MOT CLE
		*
		* @keywords<String> 						Element de recherche
		*
		* @return machines<Array> 					Retourne la liste des machines trouvees
		*
		*/
		public function search($params){
			extract($params);

			// On recupere les donnees
			$machine = new Repo('machine/search', [
				$_SESSION['WAREHOUSE']['id'],
				$keywords
			]);

			return [ 'machines' => $machine->answer() ];
		}


		/* RENVOIE LA LISTE EXHAUSTIVE DES MACHINES
		*
		* @return machines<Array> 							Liste des machines
		*
		*/
		public function getAll(){
			// On recupere les donnees
			$machines = new Repo('machine/getAll', [$_SESSION['WAREHOUSE']['id']]);

			return [ 'machines' => $machines->answer() ];
		}


		/* RENVOIE LA MACHINE D'UID DONNE
		*
		* @id_machine<int>									UID de la machine en question
		*
		* @return machine<Array> 							Machine d'UID donne
		*
		*/
		public function getById($params){
			extract($params);

			// On recupere les donnees
			$request = new Repo('machine/getById', [
				$_SESSION['WAREHOUSE']['id'],
				$id_machine
			]);
			$answer  = $request->answer();

			// Si aucun resultat, on retourne une erreur
			if( $answer === false )
				return [ 'error' => new Error(Err::NoMatchFound) ];


			return [ 'machine' => $answer ];
		}


		/* RENVOIE LA MACHINE DE NAME DONNE
		*
		* @name<String>										Name de l'utilisateur en question
		*
		* @return machine<Array> 							Machine de name donne
		*
		*/
		public function getByName($params){
			extract($params);


			// On recupere les donnees
			$request = new Repo('machine/getByName', [
				$_SESSION['WAREHOUSE']['id'],
				$name
			]);
			$answer  = $request->answer();

			// Si aucun resultat, on retourne une erreur
			if( $answer === false )
				return [ 'error' => new Error(Err::NoMatchFound) ];


			return [ 'machine' => $answer ];
		}


		/* RENVOIE LES GROUPES D'UNE MACHINE DONNEE
		*
		* @id_machine<int>									UID de la machine en question
		*
		* @return clusters<Array> 							Groupes de la machine donne
		*
		*/
		public function getClusters($params){
			extract($params);

			// On recupere les donnees
			$request = new Repo('machine/getClusters', [
				$_SESSION['WAREHOUSE']['id'],
				$id_machine
			]);
			$answer = $request->answer();

			// Si aucun resultat, on retourne une erreur
			if( $answer === false )
				return [ 'error' => new Error(Err::NoMatchFound) ];


			return [ 'clusters' => $answer ];
		}


		/* MODIFIE UNE MACHINE DONNEE
		*
		* @id_machine<int>     									UID de la machine
		* @name<String>		 									Identifiant l'utilisateur
		*
		* @return status<Boolean> 								Retourne si oui ou non tout s'est bien deroule
		*
		*/
		public function edit($params){
			extract($params);


			/* [1] On verifie l'existence de la machine
			=========================================================*/
			$machine_exists = new Repo('machine/getById', [
				$_SESSION['WAREHOUSE']['id'],
				$id_machine
			]);
			$machine_data = $machine_exists->answer();

			// Si on a recupere aucune machine, on retourne une erreur
			if( !is_array($machine_data) )
				return ['error' => new Error(Err::NoMatchFound)];


			/* [2] Vérification unicité (name)
			=========================================================*/
			/* (1) Check if unique : name */
			$byName_r = new Repo('machine/getByName', [$_SESSION['WAREHOUSE']['id'], $name]);
			$byName = $byName_r->answer();

			/* (2) If already used (not current machine) -> error */
			if( $byName != false && $byName['id_machine'] != $id_machine )
				return ['error' => new Error(Err::AlreadyExists, 'name')];


			/* [3] Normalisation + verification des donnees
			=========================================================*/

			/* (1) Verification des parametres (si correct et different)*/
			$correct_param = [
				'name'  => !is_null($name) && $machine_data['name'] != $name
			];

			/* (2) Gestion des parametres optionnels */
			$opt_data = [
				'name' => ($correct_param['name']) ? $name : $machine_data['name']
			];


			/* [4] Modification de la machine
			 =========================================================*/
			$request = new Repo('machine/edit', [
				$_SESSION['WAREHOUSE']['id'],
				$id_machine,
				$opt_data['name']
			]);


			return [ 'status' => $request->answer() ];
		}


		/* SUPPRIME UNE MACHINE DONNEE
		*
		* @id_machine<int>									UID de la machine en question
		*
		* @return status<Boolean> 							Retourne si oui ou non tout s'est bien deroule
		*
		*/
		public function delete($params){
			extract($params);

			// On recupere les donnees
			$del_machine = new Repo('machine/delete', [
				$_SESSION['WAREHOUSE']['id'],
				$id_machine
			]);
			$deleted_machine = $del_machine->answer();


			return [ 'status' => $deleted_machine ];
		}


		/* RETURN MACHINE STATE
		*
		* @id_machine<int>						UID of the machine
		*
		* @return state<string>						Machine state
		*
		*/
		public function getState($params){
			extract($params);


			/* [1] Get machine info
			=========================================================*/
			/* (1) Write request */
			$machine_req = new Request('machineDefault/getById', ['id_machine' => $id_machine]);

			/* (2) Execute request */
			$machine_res = $machine_req->dispatch();

			/* (3) Manage error */
			if( $machine_res->error->get() != Err::Success )
				return [ 'error' => $machine_res->error ];

			/* (4) Fetch data */
			$machine = $machine_res->get('machine');


			/* [2] Get action id=>name
			=========================================================*/
			$action = [];

			/* (1) Write request */
			$action_req = new Repo('action/getAll', []);

			/* (2) Manage error */
			if( $action_req->error->get() != Err::Success )
				return [ 'error' => $action_req->error ];

			/* (3) Create association array */
			foreach($action_req->answer() as $a)
				$action[ strtolower($a['name']) ] = $a['id_action'];


			/* [3] Get history for the machine
			=========================================================*/
			/* (1) Write request */
			$history_req = new Repo('history/getByIdMachine', [$id_machine]);

			/* (2) Manage error */
			if( $history_req->error->get() != Err::Success )
				return [ 'error' => $history_req->error ];

			/* (3) Extract history */
			$history = $history_req->answer();


			/* [4] Process state
			=========================================================*/

			/* (1) IF DETACHED (never initialized)
			---------------------------------------------------------*/
			/* (1) Check machine data (no token | unlock code) */
			if( !$machine['token'] || $machine['unlock_code'] )
				return [ 'state' => 'detached' ];


			/* (2) STOPPED (no history)
			---------------------------------------------------------*/
			if( count($history) <= 0 )
				return [ 'state' => 'stopped' ];

			/* (3) LOCKED (last = lock)
			---------------------------------------------------------*/
			if( $history[0]['id_action'] == $action['lock'] )
				return [ 'state' => 'locked' ];

			/* (4) STOPPED (last = unlock | stop)
			---------------------------------------------------------*/
			if( in_array($history[0]['id_action'], [$action['stop'], $action['unlock']]) )
				return [ 'state' => 'stopped' ];


			/* (5) SIGNALED (start|stop ..... signal)
			---------------------------------------------------------*/
			for( $c = 0 ; $c < count($history) ; $c++ ){

				/* (1) If (start|stop), continue to search */
				if( in_array($history[$c]['id_action'] , [$action['start'], $action['stop']]) )
					continue;

				/* (2) If (signal) found, therefore it is signaled */
				else if( $history[$c]['id_action'] == $action['signal'] )
					return [ 'state' => 'signaled' ];

				/* (6.1) STARTED (last state)
				---------------------------------------------------------*/
				else
					return [ 'state' => 'started' ];

			}

			/* (6.2) STARTED (last state)
			---------------------------------------------------------*/
			return [ 'state' => 'started' ];

		}


		/* RETURNS ALL INFORMATION NEEDED BY MACHINES IN ORDER TO WORK
		*
		* @id_machine<int>						Machine UID
		*
		* @return data<Array<Mixed>>					Useful data
		*
		*/
		private static function getMachineWorkingInformation($id_machine){


			/* [1] On envoie les e-tree de la machine
			=========================================================*/ {

				$etrees = [];

				/* (1) On essaie de récupérer les etree de la machine*/
				$mc_req = new Request('machineDefault/getClusters', ['id_machine' => $id_machine]);

				$mc_res = $mc_req->dispatch();

				/* (2) Si on arrive à récupérer les clusters */
				if( $mc_res->error->get() == Err::Success ){

					/* (3) Pour chaque cluster, on récupère les e-trees */
					foreach($mc_res->get('clusters') as $cluster){

						/* (4) On les e-trees du cluster */
						$etree_req = new Request('clusterDefault/getEtrees', [
							'id_machine_cluster' => $cluster['id_machine_cluster']
						]);

						$etree_res = $etree_req->dispatch();

						/* (5) Si erreur, on passe */
						if( $etree_res->error->get() != Err::Success )
							continue;

						/* (6) Sinon -> On entregistre les e-trees */
						foreach($etree_res->get('etrees') as $etree){
							$etree_name = $etree['name'].'-'.$etree['daemon'];

							/* (7) Si pas déja entregistré -> on l'ajoute */
							if( !in_array($etree_name, $etrees) )
								$etrees[] = $etree_name;
						}


					}

				}

			}


			/* [2] On récupère les données de chaque feature
			=========================================================*/
			$features = [];

			/* (1) Pour chaque etree/feature  */
			foreach($etrees as $etree_name){

				$features[$etree_name] = [];

				/* (2) On lance le dispatch */
				$dispatch_feat_req = new Request('deployDefault/dispatch', [
					'etree' => $etree_name
				]);

				/* (3) Exécution + récupération réponse */
				$dispatch_feat_res = $dispatch_feat_req->dispatch();

				/* (4) Gestion erreur */
				if( $dispatch_feat_res->error->get() != Err::Success )
					continue;

				/* (5) Enregistrement des données */
				$features[$etree_name] = $dispatch_feat_res->get('data');

			}


			/* [N] Retourne les données
			=========================================================*/
			return [
				'etrees'      => $etrees,
				'features'    => $features
			];

		}


		/* ENVOI DES DONNEES D'INITIALISATION DU SATS
		*
		* @return id_machine<int> 					UID de la machine
		* @return token<string> 					Nouveau token d'identification (hashage cyclique)
		* @return unlock<string> 					Code de déblocage de la machine
		*
		*/
		public function sync($params){
			extract($params);


			/* [1] On essaie de débloquer la machine
			=========================================================*/
			/* (1) On rédige la requête */
			$unlockReq = new Repo('machine/unlock', [
				$_SESSION['WAREHOUSE']['id'],
				$id_machine,
				$unlock,
				$token
			]);

			/* (2) On gère l'erreur */
			if( $unlockReq->error->get() != Err::Success || !$unlockReq->answer() )
				return [ 'error' => new Error(Err::TokenError) ];


			/* [N] Retourne les données
			=========================================================*/
			return self::getMachineWorkingInformation($id_machine);
		}


		/* MET A JOUR UNE MACHINE
		*
		* @token<String> 										Token de synchronisation de la machine
		* @data<Array> 											Données de la synchronisation
		* @renew<String> 										Renouvellement du token de synchronisation de la machine (opt.)
		*
		* @return data<Array> 									Données de retour de synchronisation
		*
		*/
		public function update($params){
			extract($params);


			/* [1] Initialisation des variables
			=========================================================*/
			$fetched = []; // count of registered logs for each feature


			/* [2] Gestion des données reçues
			=========================================================*/
			/* (1) For each feature data */
			if( isset($data['feature']) && is_array($data['feature']) ){

				/* (2) Create history entry in db */
				foreach($data['feature'] as $etree_name=>$feat_data){

					// {1} Use fetchDefault to dispatch the request //
					$dispatch_feat_req = new Request('fetchDefault/dispatch', [
						'etree' => $etree_name,
						'data'  => $feat_data
					]);

					// {2} Process + get response //
					$dispatch_feat_res = $dispatch_feat_req->dispatch();

					// {3} Exit on failure //
					if( $dispatch_feat_res->error->get() != Err::Success )
						continue;

					// {4} Register saved code (returned from dispatcher) //
					$fetched[$etree_name] = $dispatch_feat_res->get('saved');
				}

			}

			/* (2) Mise à jour de l'identité de la machine (ap-ip) */
			$updateNetId = new Repo('machine/updateNetworkIdentity', [
				$_SESSION['WAREHOUSE']['id'],
				$_SESSION['SATS']['id'],
				isset($data['identity']) && is_array($data['identity']) && isset($data['identity']['ap']) ? $data['identity']['ap'] : null,
				isset($data['identity']) && is_array($data['identity']) && isset($data['identity']['ip']) ? $data['identity']['ip'] : null,
			]);

			/* (3) Gestion erreur */
			if( $updateNetId->error->get() != Err::Success || !$updateNetId->answer() )
				return [ 'error' => new Error(Err::RepoError) ];


			/* [3] Gestion des données à envoyer
			=========================================================*/
			/* (1) Basic working data update
			---------------------------------------------------------*/
			$basis_update = self::getMachineWorkingInformation($_SESSION['SATS']['id']);


			/* [4] Envoi des données
			=========================================================*/
			return array_merge($basis_update, ['saved' => $fetched]);

		}


	}


?>