/*global define */
define(['jquery', 'jqueryui', 'underscore', 'backbone'], 				
	function($, $ui, _, Backbone) {
	'use strict';

	// Lookup Model
	// ------------------
	var LookupModel = Backbone.Model.extend({
		// This model contains functions for looking up values from services
		defaults: {
			concepts: {}
		},
		
		initialize: function() {
		
		    
			
		},
		
		bioportalSearch: function(request, response, localValues, allValues) {
			
			// make sure we have something to lookup
			if (!appModel.get('bioportalSearchUrl')) {
				response(localValues);
				return;
			}
			
			var query = appModel.get('bioportalSearchUrl') + request.term;
			var availableTags = [];
			$.get(query, function(data, textStatus, xhr) {
			
				_.each(data.collection, function(obj) {
					var choice = {};
					choice.label = obj['prefLabel'];
					var synonyms = obj['synonym'];
					if (synonyms) {
						choice.synonyms = [];
						_.each(synonyms, function(synonym) {
							choice.synonyms.push(synonym);
						});
					}
					choice.filterLabel = obj['prefLabel'];
					choice.value = obj['@id'];
					if (obj['definition']) {
						choice.desc = obj['definition'][0];
					}
					
					// mark items that we know we have matches for
					if (allValues) {
						var matchingChoice = _.findWhere(allValues, {value: choice.value});
						if (matchingChoice) {
							//choice.label = "*" + choice.label;
							choice.match = true;
							
							// remove it from the local value - why have two?
							if (localValues) {
								localValues = _.reject(localValues, function(obj) {
									return obj.value == matchingChoice.value;
								});
							}
							//availableTags.push(choice);
						}
					}
					
					availableTags.push(choice);

				});
				
				// combine the lists if called that way
				if (localValues) {
					availableTags = localValues.concat(availableTags);
				}
				
				response(availableTags);
				
			});
		},
		
		bioportalExpand: function(term) {
			
			// make sure we have something to lookup
			if (!appModel.get('bioportalSearchUrl')) {
				response(null);
				return;
			}
			
			var terms = [];
			var countdown = 0;

			var query = appModel.get('bioportalSearchUrl') + term;
			$.ajax(
			{
				url: query, 
				method: "GET",
				async: false, // we want to wait for the response!
				success: function(data, textStatus, xhr) {
			
				_.each(data.collection, function(obj) {
					// use the preferred label
					var prefLabel = obj['prefLabel'];
					terms.push(prefLabel);

					// add the synonyms
					var synonyms = obj['synonym'];
					if (synonyms) {
						_.each(synonyms, function(synonym) {
							terms.push(synonym);
						});
					}
					// process the descendants
					var descendantsUrl = obj['links']['descendants'];
					//if (false) {
					if (descendantsUrl && countdown > 0) {
						
						countdown--;
						
						$.ajax(
						{
						url: descendantsUrl + "?apikey=" + appModel.get("bioportalAPIKey"),
						method: "GET",
						async: false,
						success: function(data, textStatus, xhr) {
							_.each(data.collection, function(obj) {
								var prefLabel = obj['prefLabel'];
								var synonyms = obj['synonym'];
								if (synonyms) {
									_.each(synonyms, function(synonym) {
										terms.push(synonym);
									});
								}
							});
						}
							});
					}
				});
			}
			});
			return terms;
		},
		
		bioportalGetConcepts: function(uri, callback) {
			
			var concepts = this.get('concepts')[uri];
			
			if (concepts) {
				callback(concepts);
				return;
			} else {
				concepts = [];
			}

			// make sure we have something to lookup
			if (!appModel.get('bioportalSearchUrl')) {
				return;
			}
			
			var query = appModel.get('bioportalSearchUrl') + encodeURIComponent(uri);
			var availableTags = [];
			var model = this;
			$.get(query, function(data, textStatus, xhr) {
			
				_.each(data.collection, function(obj) {
					var concept = {};
					concept.label = obj['prefLabel'];
					concept.value = obj['@id'];
					if (obj['definition']) {
						concept.desc = obj['definition'][0];
					}
					// add the synonyms
					var synonyms = obj['synonym'];
					if (synonyms) {
						concept.synonyms = [];
						_.each(synonyms, function(synonym) {
							concept.synonyms.push(synonym);
						});
					}
					
					concepts.push(concept);

				});
				model.get('concepts')[uri] = concepts;

				callback(concepts);
			});
		},

		bioportalGetConceptsBatch: function(uris, callback) {
			
			// make sure we have something to lookup
			if (!appModel.get('bioportalBatchUrl')) {
				return;
			}
			// prepare the request JSON
			var batchData = {};
			batchData["http://www.w3.org/2002/07/owl#Class"] = {};
			batchData["http://www.w3.org/2002/07/owl#Class"]["display"] = "prefLabel,synonym,definition";
			batchData["http://www.w3.org/2002/07/owl#Class"]["collection"] = [];
			_.each(uris, function(uri) {
				var item = {};
				item["class"] = uri;
				item["ontology"] = "http://data.bioontology.org/ontologies/ECSO";
				batchData["http://www.w3.org/2002/07/owl#Class"]["collection"].push(item);
			});
			
			var url = appModel.get('bioportalBatchUrl');
			var model = this;
			$.ajax(url,
					{
					method: "POST",	
					//url: url, 
					data: JSON.stringify(batchData),
					contentType: "application/json",
					headers: {
						"Authorization": "apikey token="+ appModel.get("bioportalAPIKey")
					},
					error: function(e) {
						console.log(e);
					},
					success: function(data, textStatus, xhr) {
			
						_.each(data["http://www.w3.org/2002/07/owl#Class"], function(obj) {
							var concept = {};
							concept.label = obj['prefLabel'];
							concept.value = obj['@id'];
							if (obj['definition']) {
								concept.desc = obj['definition'][0];
							}
							// add the synonyms
							var synonyms = obj['synonym'];
							if (synonyms) {
								concept.synonyms = [];
								_.each(synonyms, function(synonym) {
									concept.synonyms.push(synonym);
								});
							}
							
							var conceptList = [];
							conceptList.push(concept);
							model.get('concepts')[concept.value] = conceptList;
		
						});

						callback.apply();
					}
				});
			
		},
		
		orcidGetConcepts: function(uri, callback) {
			
			var people = this.get('concepts')[uri];
			
			if (people) {
				callback(people);
				return;
			} else {
				people = [];
			}
			
			// make sure we have something to lookup
			if (!appModel.get('bioportalSearchUrl')) {
				return;
			}
			
			var query = appModel.get('orcidBaseUrl')  + uri.substring(uri.lastIndexOf("/"));
			var model = this;
			$.get(query, function(data, status, xhr) {
				// get the orcid info
				var profile = $(data).find("orcid-profile");

				_.each(profile, function(obj) {
					var choice = {};
					choice.label = $(obj).find("orcid-bio > personal-details > given-names").text() + " " + $(obj).find("orcid-bio > personal-details > family-name").text();
					choice.value = $(obj).find("orcid-identifier > uri").text();
					choice.desc = $(obj).find("orcid-bio > personal-details").text();
					people.push(choice);
				});
				
				model.get('concepts')[uri] = people;
				
				// callback with answers
				callback(people);
			})
		},
		
		/*
		 * Supplies search results for ORCiDs to autocomplete UI elements
		 */
		orcidSearch: function(request, response, more, ignore) {
			
			// make sure we have something to lookup
			if (!appModel.get('bioportalSearchUrl')) {
				response(more);
				return;
			}
			
			var people = [];
			
			if(!ignore) var ignore = [];
			
			var query = appModel.get('orcidSearchUrl') + request.term;
			$.get(query, function(data, status, xhr) {
				// get the orcid info
				var profile = $(data).find("orcid-profile");

				_.each(profile, function(obj) {
					var choice = {};
					choice.value = $(obj).find("orcid-identifier > uri").text();

					if(_.contains(ignore, choice.value.toLowerCase())) return;
					
					choice.label = $(obj).find("orcid-bio > personal-details > given-names").text() + " " + $(obj).find("orcid-bio > personal-details > family-name").text();
					choice.desc = $(obj).find("orcid-bio > personal-details").text();
					people.push(choice);
				});
				
				// add more if called that way
				if (more) {
					people = more.concat(people);
				}
				
				// callback with answers
				response(people);
			});
		},
		
		/*
		 * Gets the bio of a person given an ORCID
		 * Updates the given user model with the bio info from ORCID
		 */
		orcidGetBio: function(options){
			if(!options || !options.userModel) return;
			
			var orcid     = options.userModel.get("username"),
				onSuccess = options.success || function(){},
				onError   = options.error   || function(){};
			
			$.ajax({
				url: appModel.get("orcidSearchUrl") + orcid,
				type: "GET",
				//accepts: "application/orcid+json",
				success: function(data, textStatus, xhr){					
					// get the orcid info
					var orcidNode = $(data).find("path:contains(" + orcid + ")"),
						profile = orcidNode.length? $(orcidNode).parents("orcid-profile") : [];
						
					if(!profile.length) return;

					var fullName = $(profile).find("orcid-bio > personal-details > given-names").text() + " " + $(profile).find("orcid-bio > personal-details > family-name").text();
					options.userModel.set("fullName", fullName);
					
					onSuccess(data, textStatus, xhr);
				},
				error: function(xhr, textStatus, error){
					onError(xhr, textStatus, error);
				}
			});
		},
		
		getGrantAutocomplete: function(request, response){
            var term = $.ui.autocomplete.escapeRegex(request.term),
            	filterBy = "";
            
            //Only search after 3 characters or more
            if(term.length < 3) return;
            else if(term.match(/\d/)) return; //Don't search for digit only since it's most likely a user just entering the grant number directy
            else filterBy = "keyword";
     
            var url = appModel.get("grantsUrl") + "?" + filterBy + "=" + term + "&printFields=title,id";					
			var requestSettings = {
				url: url, 
				success: function(data, textStatus, xhr) {
					
					if(!data || !data.response || !data.response.award) return [];
					
					var list = [];
					
					_.each(data.response.award, function(award, i){
						list.push({ 
							value: award.id,
							label: award.title
						});
					});
					
	            	var term = $.ui.autocomplete.escapeRegex(request.term)
	                , startsWithMatcher = new RegExp("^" + term, "i")
	                , startsWith = $.grep(list, function(value) {
	                    return startsWithMatcher.test(value.label || value.value || value);
	                })
	                , containsMatcher = new RegExp(term, "i")
	                , contains = $.grep(list, function (value) {
	                    return $.inArray(value, startsWith) < 0 && 
	                        containsMatcher.test(value.label || value.value || value);
	                });
	            
	            	response(startsWith.concat(contains));			        					
				}
			}
			
			//Send the query
			$.ajax(requestSettings);			      
		},
		
		getGrant: function(id, onSuccess, onError){
			if(!id || !onSuccess || !appModel.get("grantsUrl")) return;
						
			var requestSettings = {
					url: appModel.get("grantsUrl") + "?id=" + id, 
					success: function(data, textStatus, xhr){
						if(!data || !data.response || !data.response.award || !data.response.award.length){
							if(onError) onError();
							return;
						}
						
						onSuccess(data.response.award[0]);
					},
					error: function(){
						if(onError) onError();
					}
			}
			
			//Send the query
			$.ajax(requestSettings);
		}
		
	});
	return LookupModel;		
});