<?php

require_once('DAO.class.php');

class Gchange {
	
	private $dao;

	private $cacheDir = __DIR__ . '/../cache/';

	private $isActivatedCache = true;

	private $cacheLongevity = array(
		'placesNearby' => 604800, // 3 jours
		'users' =>  43200, // 12 heures
		'records' => 900 // 15 min
	);

	public function __construct () {
		
		$this->dao = DAO::getInstance();
	}

	public function getRecordsByIssuer ($issuer) {


		$recordsCacheDir = 'records/user/';
		$recordsCacheFile = $issuer . '.json';

		$json = $this->getJsonFromCache($recordsCacheDir, $recordsCacheFile, $this->cacheLongevity['records']);

		if (empty($json)) {

			$n = 20;
			
			$queryParams = [
				'size' => $n, 
				'query' => [
					'bool' =>[
						'must' => [
							'term' => [
								'issuer' => $issuer
							]
						], 
						'must_not' => [
							[ "term" => ["stock" => 0] ]
						]
					]
				], 
				'sort' => [
					['time' => 'desc']
				]
			];
			
			$json = $this->dao->fetchJson('/market/record/_search', 'gchange', $queryParams);
				
			$this->cacheJson($recordsCacheDir, $recordsCacheFile, $json);
		}

		$result = json_decode($json);
		
		return $result->hits->hits;

	}
	
	private function getJsonFromCache ($dir, $file, $cacheLongevity) {

		if (!$this->isActivatedCache) {
			
			return NULL;
		
		}

		$json = null;
		$jsonFullPath = $this->cacheDir . $dir . $file;

		if (file_exists($jsonFullPath) and ((time() - filemtime($jsonFullPath)) < $cacheLongevity)) {
			
			$json = file_get_contents($jsonFullPath);
		}

		return $json;

	}

	private function cacheJson ($dir, $file, $json) {
		
		if (!$this->isActivatedCache) {

			return NULL;
		}

		$jsonCacheDir = $this->cacheDir . $dir;
		$jsonFullPath = $jsonCacheDir . $file;
		
		if (!file_exists($jsonCacheDir)) {
			
			mkdir($jsonCacheDir, 0777, true);
		
		}
		
		file_put_contents($jsonFullPath, $json);
	}

	public function getUser ($pubkey) {

		$usersCacheDir =  'users/';
		$usersCacheFile = $pubkey . '.json';

		$json = $this->getJsonFromCache($usersCacheDir, $usersCacheFile, $this->cacheLongevity['users']);

		if (empty($json)) {

			$json = $this->dao->fetchJson(('/user/profile/'. $pubkey), 'gchange');
			
			$this->cacheJson($usersCacheDir, $usersCacheFile, $json);
		}

		$result = json_decode($json);
		
		return $result;
	}

	public function getPlacesNearUser ($user, $radius) {

		$placesCacheDir = 'places-nearby/user/';
		$placesCacheFile = $user->_id . '.json';

		$json = $this->getJsonFromCache($placesCacheDir, $placesCacheFile, $this->cacheLongevity['placesNearby']);

		if (empty($json)) {
			
			$json = $this->getNearbyPlacesJson($user->_source->geoPoint->lat, $user->_source->geoPoint->lon, RADIUS);
			
			$this->cacheJson($placesCacheDir, $placesCacheFile, $json);

		}

		$result = json_decode($json);
		
		return $result->hits->hits;
	}

	public function getNearbyPlaces ($lat, $lon, $maxDistance, $minDistance = NULL) {

		$json = $this->getNearbyPlacesJson($lat, $lon, $maxDistance, $minDistance);

		$result = json_decode($json);
		
		return $result->hits->hits;
	}


	public function getNearbyPlacesJson ($lat, $lon, $maxDistance, $minDistance = NULL) {
		
		$n = 20;
		
		$queryParams = [
			'size' => $n, 
			'query' => [
				'bool' => [
					'must' => [
						[
							'geo_distance' => [
								
								"distance" => $maxDistance . 'km',
								"geoPoint"=> [
									"lat" => $lat,
									"lon" => $lon
								]
							]
						]
					]
				]
			]
		];
		
		$json = $this->dao->fetchJson('/page/record/_search', 'gchange', $queryParams);

		return $json;
	}
	
	public function getNearbyRecords ($lat, $lon, $maxDistance, $minDistance = NULL) {
		
		$n = 20;
		
		$queryParams = [
			'size' => $n, 
			'query' => [
				'bool' => [
					'must' => [
						[
							'geo_distance' => [
								
								"distance" => $maxDistance . 'km',
								"geoPoint"=> [
									"lat" => $lat,
									"lon" => $lon
								]
							]
						], [
							'range' => [
								'stock' => [
									'gte' => 1
								]
							]
						]
					]
				]
			]
		];
		
		$json = $this->dao->fetchJson('/market/record/_search?pretty', 'gchange', $queryParams);
		$result = json_decode($json);
		
		return $result->hits->hits;
	}
	
	public function getImmaterialRecords () {
		
		$n = 20;
		
		$queryParams = [
			'size' => $n, 
			'query' => [
				'nested' => [
					'path' => 'category', 
					'query' => [
						'bool' => [
							'should' => [
								[ 'term' => [ 'category.parent' => 'cat31' ] ], 
								[ 'term' => [ 'category.id' => 'cat31' ] ], 
								[ 'term' => [ 'category.parent' => 'cat74' ] ], 
								[ 'term' => [ 'category.id' => 'cat74' ] ]
							], 
							'must_not' => [
								[ "term" => ["category.id" => "cat65"] ]
							]
						]
					]
				]
			]
		];
		
		$json = $this->dao->fetchJson('/market/record/_search?pretty', 'gchange', $queryParams);
		$result = json_decode($json);
		
		return $result->hits->hits;
	}
	
	public function getShippable () {
		
		$n = 20;
		
		$queryParams = [
			'size' => $n, 
			'query' => [
				'match' => [
					'description' => 'envoi possible'
				]
			]
		];
		
		$json = $this->dao->fetchJson('/market/record/_search?pretty', 'gchange', $queryParams);
		$result = json_decode($json);
		
		return $result->hits->hits;
	}
	
	public function getHousingOffers () {
		
		
	}
	
	public function getShippableOffers () {
		
		
	}
}