<?php

namespace ggbnportal\controllers;

use Yii;
use yii\base\InvalidParamException;
use yii\web\BadRequestHttpException;
use yii\web\Controller;
use yii\filters\VerbFilter;
use yii\filters\AccessControl;
use yii\helpers\Url;
use ggbn\SOLRQueryManager;
use ggbn\WebService;

class ApiController extends Controller {
	public function actionIndex() {
		echo "HALLO.Placeholder page.";
	}
	public function actionSearch() {
		
		// Define whether an HTTPS connection is required
		$HTTPS_required = FALSE;
		
		// Define whether user authentication is required
		$authentication_required = FALSE;
		
		// Define API response codes and their related HTTP response
		$api_response_code = array (
				0 => array (
						'HTTP Response' => 400,
						'Message' => 'Unknown Error' 
				),
				1 => array (
						'HTTP Response' => 200,
						'Message' => 'Success' 
				),
				2 => array (
						'HTTP Response' => 403,
						'Message' => 'HTTPS Required' 
				),
				3 => array (
						'HTTP Response' => 401,
						'Message' => 'Authentication Required' 
				),
				4 => array (
						'HTTP Response' => 401,
						'Message' => 'Authentication Failed' 
				),
				5 => array (
						'HTTP Response' => 404,
						'Message' => 'Invalid Request' 
				),
				6 => array (
						'HTTP Response' => 400,
						'Message' => 'Invalid Response Format' 
				) 
		);
		$method="";
		$filters = [ ];
		if (isset ( $_GET ['unitID'] )) {
			$filters ['unitID'] = $_GET ['unitID'];
		} else {
			$filters ['unitID'] = '*';
		}
		if (isset ( $_GET ['sampleType'] )) {
			$filters ['sampletype'] = $_GET ['sampleType'];
		}
		if (isset ( $_GET ['name'] )) {
			$filters ['fullScientificName'] = $_GET ['name'];
		}
		if (isset ( $_GET ['country'] )) {
			$filters ['country'] = $_GET ['country'];
		}
		if (isset ( $_GET ['isocountry'] )) {
			$filters ['countryisocode'] = $_GET ['isocountry'];
		}
		if (isset ( $_GET ['repository'] )) {
			$filters ['institution'] = $_GET ['repository'];
		}
		if (isset ( $_GET ['institution'] )) {
			$filters ['institution'] = $_GET ['institution'];
		}
		
		$facetnames = [ ];
		
		if (isset ( $_GET ['getSampletype'] )){
			$facetnames [] = 'sampletype';
			$method="getSampletype";
		}
		
		if (isset ( $_GET ['getClassification'] )) {
			$facetnames [] = 'familia';
			$facetnames [] = 'genus';
			$facetnames [] = 'ordo';
			$facetnames [] = 'phylum';
			$facetnames [] = 'regnum';
			$method="getClassification";
		}
		if (isset ( $_GET ['getCounts'] )) {
			$method="getCounts";
			$facetnames = [ ];
			$facetnames [] = 'sampletype';
			$facetnames [] = 'familia';
			$facetnames [] = 'genus';
			$filters = [ ];
			if (isset ( $_GET ['repository'] ) || isset ( $_GET ['institution'] )) {
				if (isset ( $_GET ['repository'] ))
					$filters ['institution'] = $_GET ['repository'];
				if (isset ( $_GET ['institution'] ))
					$filters ['institution'] = $_GET ['institution'];
			} else
				$filters ['institution'] = "---";
		}
		
		if (isset ( $_GET ['getRepositories'] )) {
			$method="getRepositories";
			$facetnames = [ ];
			$facetnames [] = 'institution';
			$filters = [ ];
			$filters ['institution'] = "---";
		}
		
		$config = SOLRQueryManager::getConfigSearch ();
		$query = SOLRQueryManager::createSearchQuery ( $config );
		$q = [ ];
		foreach ( $filters as $key => $value ) {
			$value = str_replace ( " ", "\ ", $value );
			$value = str_replace ( "(", "\(", $value );
			$value = str_replace ( ")", "\)", $value );
			$value = str_replace ( ":", "\:", $value );
			$q [] = SOLRQueryManager::getPartialQuery ( $key, $value, $filters, False );
		}
		
		$fq =NULL;
		if(!empty($filters)){
		$fq = "{!join from=tripleidstoreid to=tripleidstoreid fromIndex=" . Yii::$app->params ['solrdetailsname'] . "}*:*";
// 		$fq.=implode ( " AND ", $q );
		}
		
		$query->setRows ( 0 );
		$q2 = [ ];
		foreach ( $q as $qq )
			if (! empty ( $qq ))
				$q2 [] = $qq;
		if (empty ( $q2 ))
			$q2 = [ 
					"*:*" 
			];
		$q = $q2;
		$raw_response = SOLRQueryManager::apiQuery ( $query, implode ( " AND ", $q ), $fq, $facetnames, "[]" );
		
		// echo "Hello World! This is a first test for API RESTful Webservice on GGBN index. Data retrieved from SOLR index using portal queries. Yeah!
		// TODO: encoding somehow wrong, but hex-unicode seems to be a browser problem only; wt=xml looks strange, since json is output format;
		// can enforce wt=json, but than portal facet search is no longer working
		// check whether to use one SOLR core for portal and API or better two separate cores -> need specification what is required from
		// third parties such as EOL, GBIF, INSDC, and EDIT
		// If we can use same SOLR core for both would it be easier to use the web service for portal too?
		
		// Currently working parameters: unitID, sampleType, name, country, isocountry
		// ";
		$format = 'json';
		
		// $response ['code'] = 0;
		// $response ['status'] = $status;
		
		// echo $status;
		
		if (isset ( $_GET ['getCounts'] )) {
			$response = [ ];
			$response["method"]=$method;
			foreach ($filters as $k=>$v)
				if($v!=="---" && $v!=="*")
				$response["filters"]=$k."=".$v;
			$response ['nbSamples'] = $raw_response->getNumFound ();
			$f = $raw_response->getFacetSet ()->getFacet ( "familia" );
			$nb = 0;
			foreach ( $f as $ff ) {
				$nb += 1;
			}
			
			$response ['nbFamilies'] = $nb;
			
			$f = $raw_response->getFacetSet ()->getFacet ( "genus" );
			$nb = 0;
			foreach ( $f as $ff ) {
				$nb += 1;
			}
			$response ['nbGenera'] = $nb;
			$response ['samples'] = $raw_response->getFacetSet ()->getFacet ( "sampletype" );
		} else {
			
			$doc = $raw_response->getFacetSet ();
			$numFound = $raw_response->getNumFound ();
			
			$status = $raw_response->getStatus();
			$response = [ ];
			$response["method"]=[$method];
			foreach ($filters as $k=>$v)
				if($v!=="---" && $v!=="*")
					$response["filters"]=$k."=".$v;
			$facets=$raw_response->getFacetSet();
			foreach($facetnames as $fn )
				$response[$fn] = $facets->getFacet($fn);
		}
		WebService::deliver_response ( $format, $response );
	
		return;
	}
}