<?php
/**
 * Traitement de l'ordre :
 *
 * Fonction qui rajoute l'ordre et le sens de chaque way d'une relation dans la table `osm_relation_a_chemins`
 *
 * Exemple de lancement du script :
 * /opt/lampp/bin/php -d memory_limit=8000M cli.php osm -a ordre -m manuel
 *
 */
class OrdonneurDeChemins {
	private $conteneur;
	private $bdd;
	private $messages;
	private $mode;

	private $premierNoeudPolygon = null;
	private $infosRel = array();
	private $infosNoeuds = array();
	private $idRelation = null;
	private $idChemin = null;
	private $idNoeud = null;
	private $ordre = 0;

	public function __construct($conteneur) {
		$this->conteneur = $conteneur;
		$this->bdd = $this->conteneur->getBdd();
		$this->messages = $this->conteneur->getMessages();
		$this->mode = $this->conteneur->getParametre('m');
	}

	public function executer() {
		$relations = $this->getToutesRelationsAChemins();
		if ($this->mode == 'manuel') {
			$this->messages->traiterInfo("Nombre de relations : %s", array(count($relations)));
		}
		foreach ($relations as $relation) {
			// Traitement de la relation courante
			$this->idRelation = $relation['id_relation'];

			$this->chargerDonneesRelationActuelle();

			$numPolygon = 1;
			while(count($this->chemins) > 0) {
				reset($this->chemins);
				$idChemin = key($this->chemins);
				echo "--------------POLY : $numPolygon : $idChemin\n";
				$this->ordonnerCheminsRelation($numPolygon, $idChemin);
				$this->mettreAJourRelationAChemin();
				$numPolygon++;
			}

			// Affichage de l'avancement
			if ($this->mode == 'manuel') {
				$this->messages->afficherAvancement("Ordone les chemins de la relation : ", 1);
			}
		}
	}

	private function getToutesRelationsAChemins() {
		$requete = 'SELECT DISTINCT id_relation '.
			'FROM osm_relation_a_chemins '.
			'WHERE id_relation = 403823 '.
			' -- '.__FILE__.' : '.__LINE__;
		$relations = $this->bdd->recupererTous($requete);
		return $relations;
	}

	private function chargerDonneesRelationActuelle() {
		$requete = 'SELECT cn.id_chemin, cn.id_noeud, cn.ordre '.
			'FROM osm_relation_a_chemins AS rc '.
			'	INNER JOIN osm_chemin_a_noeuds AS cn ON (rc.id_chemin = cn.id_chemin) '.
			"WHERE rc.id_relation = {$this->idRelation} ".
			"ORDER BY rc.ordre ASC, cn.ordre ASC ".
			' -- '.__FILE__.' : '.__LINE__;
		$infos = $this->bdd->recupererTous($requete);
		$noeuds = array();
		foreach ($infos as $info) {
			$noeuds[$info['id_noeud']][$info['id_chemin']] = $info['ordre'];
			if (! isset($this->chemins[$info['id_chemin']]) ) {
				$this->chemins[$info['id_chemin']]['max'] == info['ordre'];
				if ($info['ordre'] == 1) {
					$this->chemins[$info['id_chemin']][0] == $info['id_noeud'];
				}
			} else {

			}
			if (count($noeuds[$info['id_noeud']]) == 2) {
				list($premierChemin, $dernierChemin) = array_keys($noeuds[$info['id_noeud']]);
				$this->chemins[$premierChemin][] = $info['id_noeud'];
				$this->chemins[$dernierChemin][] = $info['id_noeud'];
				$this->noeuds[$info['id_noeud']][$premierChemin] = $dernierChemin;
				$this->noeuds[$info['id_noeud']][$dernierChemin] = $premierChemin;
			}
		}
		//print_r($this->chemins);exit();
	}

	private function ordonnerCheminsRelation($numPolygon, $idChemin, $idCheminPrecedent = null, $ordre = 1) {
		$this->infosRel[$idChemin] = array($ordre, $numPolygon);

		list($premierNoeud, $dernierNoeud) = $this->chemins[$idChemin];

		if ($idCheminPrecedent == null) {// Premier chemin à tester
			$this->premierNoeudPolygon = $premierNoeud;
			$noeudSuivant = ($dernierNoeud == $premierNoeud) ? $premierNoeud : $dernierNoeud;
			echo "Chemin $idChemin :: premierNoeud: $premierNoeud, dernierNoeud: $dernierNoeud \n";
		} else {
			list($premierNoeudPrec, $dernierNoeudPrec) = $this->chemins[$idCheminPrecedent];
			unset($this->chemins[$idCheminPrecedent]);
			$noeudSuivant = ($dernierNoeudPrec == $dernierNoeud || $premierNoeudPrec == $dernierNoeud) ? $premierNoeud : $dernierNoeud;
			echo "Chemin $idChemin :: premierNoeudPrec: $premierNoeudPrec, dernierNoeudPrec: $dernierNoeudPrec, premierNoeud: $premierNoeud, dernierNoeud: $dernierNoeud \n";
		}

		if ($this->premierNoeudPolygon != $noeudSuivant) {
			if (isset($this->noeuds[$noeudSuivant][$idChemin])) {
				$idCheminSuivant = $this->noeuds[$noeudSuivant][$idChemin];
				if (! isset($this->infosRel[$idCheminSuivant])) {
					$this->ordonnerCheminsRelation($numPolygon, $idCheminSuivant, $idChemin, ++$ordre);
				} else {
					$this->messages->traiterAvertissement("Chemins %s déjà pris en comtpe", array($idCheminSuivant));
				}
			} else {
				$this->messages->traiterAvertissement("Relation %s a un polygone incomplet", array($this->idRelation));
			}
		} else {
			unset($this->chemins[$idChemin]);
		}
		return null;
	}

	private function mettreAJourRelationAChemin() {
		if (count($this->infosRel) > 0) {
			foreach ($this->infosRel as $idC => $donnees) {
				list($ordre, $numPolygon) = $this->bdd->proteger($donnees);
				$requete = 'UPDATE osm_relation_a_chemins '.
					"SET sens = $ordre, num_poly = $numPolygon ".
					"WHERE id_relation = {$this->idRelation} ".
					"AND id_chemin = $idC ".
					' -- '.__FILE__.' : '.__LINE__;
				$this->bdd->requeter($requete);
			}
			$this->infosRel = array();
		}
	}

	private function creerSet($donnees) {
		$values = array();
		foreach ($donnees as $infos) {
			$infosP = $this->bdd->proteger($infos);
			$values[] = implode(',', $infosP);
		}
		$valuesClause = '('.implode('),(', $values).')';
		return $valuesClause;
	}

	private function getIdPremierChemin() {
		$idChemin = null;
		if (count($this->infosRel) > 0) {
			reset($this->infosRel);
			$idChemin = key($this->infosRel);
		}
		return $idChemin;
	}

	private function mettreAJourChemin($sens, $ligne, $fichier = __FILE__) {
		$ordre = $this->ordre++;
		$requete = 'UPDATE osm_relation_a_chemins '.
			"SET ordre = '$ordre', sens = '$sens' ".
			"WHERE id_relation = {$this->idRelation} ".
			"AND id_chemin = {$this->idChemin} ".
			" -- $fichier : $ligne";
		$retour = $this->bdd->requeter($requete);
		return $retour;
	}

	private function getIdDernierNoeud() {
		$idNoeud = false;
		if (count($this->infosRel[$this->idChemin]) > 0) {
			end($this->infosRel[$this->idChemin]);
			$idNoeud = current($this->infosRel[$this->idChemin]);
		}
		return $idNoeud;
	}

	private function ordonnerChemins() {
		foreach ($this->infosRel as $chemin) {
			// Selection du chemin qui possède le dernier noeud du précédent chemin et écarter l'actuel
			$idCheminSuivant = $this->getIdCheminSuivant();
			if ($idCheminSuivant) {
				$this->idChemin = $idCheminSuivant;
				$idPremierNoeud = $this->getIdPremierNoeud();
				$idDernierNoeud = $this->getIdDernierNoeud();
				$sens = $this->getSens($idPremierNoeud);
				$this->mettreAJourChemin($sens, __LINE__);
				$this->idNoeud =  ($sens == 'directe') ? $idDernierNoeud : $idPremierNoeud;
			}
		}
	}

	private function getIdCheminSuivant() {
		$idCheminSuivant = false;
		if (isset($this->infosNoeuds[$this->idNoeud])) {
			$idCheminSuivant = next($this->infosNoeuds[$this->idNoeud]);
			//echo $this->idChemin.'-'.$idCheminSuivant."\n".print_r($this->infosNoeuds[$this->idNoeud]); exit();
		} else {
			$msg = "Impossible de trouver le chemin suivant pour la relation : %s, le chemin %s et le noeud %s";
			$this->messages->traiterAvertissement($msg, array($this->idRelation, $this->idChemin, $this->idNoeud));
		}
		return $idCheminSuivant;
	}

	private function getSens($idPremierNoeud) {
		$sens = ( strcmp($idPremierNoeud, $this->idNoeud ) == 0 ) ? 'directe' : 'indirecte';
		return $sens;
	}

	private function getIdPremierNoeud() {
		$idNoeud = false;
		if (count($this->infosRel[$this->idChemin]) > 0) {
			reset($this->infosRel[$this->idChemin]);
			$idNoeud = current($this->infosRel[$this->idChemin]);
		}
		return $idNoeud;
	}
}