// https://github.com/Pixabay/JavaScript-autoComplete/commit/eda3201210a86f7fcfb7f496f4b2ca419ff423e8
// MIT Licence
var autoComplete=function(){function e(e){function t(e,t){return e.classList?e.classList.contains(t):new RegExp("\\b"+t+"\\b").test(e.className)}function o(e,t,o){e.attachEvent?e.attachEvent("on"+t,o):e.addEventListener(t,o)}function s(e,t,o){e.detachEvent?e.detachEvent("on"+t,o):e.removeEventListener(t,o)}function n(e,s,n,l){o(l||document,s,function(o){for(var s,l=o.target||o.srcElement;l&&!(s=t(l,e));)l=l.parentElement;s&&n.call(l,o)})}if(document.querySelector){var l={selector:0,source:0,minChars:3,delay:150,offsetLeft:0,offsetTop:1,cache:1,menuClass:"",renderItem:function(e,t){t=t.replace(/[-\/\\^$*+?.()|[\]{}]/g,"\\$&");var o=new RegExp("("+t.split(" ").join("|")+")","gi");return'<div class="autocomplete-suggestion" data-val="'+e+'">'+e.replace(o,"<b>$1</b>")+"</div>"},onSelect:function(){}};for(var c in e)e.hasOwnProperty(c)&&(l[c]=e[c]);for(var a="object"==typeof l.selector?[l.selector]:document.querySelectorAll(l.selector),u=0;u<a.length;u++){var i=a[u];i.sc=document.createElement("div"),i.sc.className="autocomplete-suggestions "+l.menuClass,i.autocompleteAttr=i.getAttribute("autocomplete"),i.setAttribute("autocomplete","off"),i.cache={},i.last_val="",i.updateSC=function(e,t){var o=i.getBoundingClientRect();if(i.sc.style.left=Math.round(o.left+(window.pageXOffset||document.documentElement.scrollLeft)+l.offsetLeft)+"px",i.sc.style.top=Math.round(o.bottom+(window.pageYOffset||document.documentElement.scrollTop)+l.offsetTop)+"px",i.sc.style.width=Math.round(o.right-o.left)+"px",!e&&(i.sc.style.display="block",i.sc.maxHeight||(i.sc.maxHeight=parseInt((window.getComputedStyle?getComputedStyle(i.sc,null):i.sc.currentStyle).maxHeight)),i.sc.suggestionHeight||(i.sc.suggestionHeight=i.sc.querySelector(".autocomplete-suggestion").offsetHeight),i.sc.suggestionHeight))if(t){var s=i.sc.scrollTop,n=t.getBoundingClientRect().top-i.sc.getBoundingClientRect().top;n+i.sc.suggestionHeight-i.sc.maxHeight>0?i.sc.scrollTop=n+i.sc.suggestionHeight+s-i.sc.maxHeight:0>n&&(i.sc.scrollTop=n+s)}else i.sc.scrollTop=0},o(window,"resize",i.updateSC),document.body.appendChild(i.sc),n("autocomplete-suggestion","mouseleave",function(){var e=i.sc.querySelector(".autocomplete-suggestion.selected");e&&setTimeout(function(){e.className=e.className.replace("selected","")},20)},i.sc),n("autocomplete-suggestion","mouseover",function(){var e=i.sc.querySelector(".autocomplete-suggestion.selected");e&&(e.className=e.className.replace("selected","")),this.className+=" selected"},i.sc),n("autocomplete-suggestion","mousedown",function(e){if(t(this,"autocomplete-suggestion")){var o=this.getAttribute("data-val");i.value=o,l.onSelect(e,o,this),i.sc.style.display="none"}},i.sc),i.blurHandler=function(){try{var e=document.querySelector(".autocomplete-suggestions:hover")}catch(t){var e=0}e?i!==document.activeElement&&setTimeout(function(){i.focus()},20):(i.last_val=i.value,i.sc.style.display="none",setTimeout(function(){i.sc.style.display="none"},350))},o(i,"blur",i.blurHandler);var r=function(e){var t=i.value;if(i.cache[t]=e,e.length&&t.length>=l.minChars){for(var o="",s=0;s<e.length;s++)o+=l.renderItem(e[s],t);i.sc.innerHTML=o,i.updateSC(0)}else i.sc.style.display="none"};i.keydownHandler=function(e){var t=window.event?e.keyCode:e.which;if((40==t||38==t)&&i.sc.innerHTML){var o,s=i.sc.querySelector(".autocomplete-suggestion.selected");return s?(o=40==t?s.nextSibling:s.previousSibling,o?(s.className=s.className.replace("selected",""),o.className+=" selected",i.value=o.getAttribute("data-val")):(s.className=s.className.replace("selected",""),i.value=i.last_val,o=0)):(o=40==t?i.sc.querySelector(".autocomplete-suggestion"):i.sc.childNodes[i.sc.childNodes.length-1],o.className+=" selected",i.value=o.getAttribute("data-val")),i.updateSC(0,o),!1}if(27==t)i.value=i.last_val,i.sc.style.display="none";else if(13==t||9==t){var s=i.sc.querySelector(".autocomplete-suggestion.selected");s&&"none"!=i.sc.style.display&&(l.onSelect(e,s.getAttribute("data-val"),s),setTimeout(function(){i.sc.style.display="none"},20))}},o(i,"keydown",i.keydownHandler),i.keyupHandler=function(e){var t=window.event?e.keyCode:e.which;if(!t||(35>t||t>40)&&13!=t&&27!=t){var o=i.value;if(o.length>=l.minChars){if(o!=i.last_val){if(i.last_val=o,clearTimeout(i.timer),l.cache){if(o in i.cache)return void r(i.cache[o]);for(var s=1;s<o.length-l.minChars;s++){var n=o.slice(0,o.length-s);if(n in i.cache&&!i.cache[n].length)return void r([])}}i.timer=setTimeout(function(){l.source(o,r)},l.delay)}}else i.last_val=o,i.sc.style.display="none"}},o(i,"keyup",i.keyupHandler),i.focusHandler=function(e){i.last_val="\n",i.keyupHandler(e)},l.minChars||o(i,"focus",i.focusHandler)}this.destroy=function(){for(var e=0;e<a.length;e++){var t=a[e];s(window,"resize",t.updateSC),s(t,"blur",t.blurHandler),s(t,"focus",t.focusHandler),s(t,"keydown",t.keydownHandler),s(t,"keyup",t.keyupHandler),t.autocompleteAttr?t.setAttribute("autocomplete",t.autocompleteAttr):t.removeAttribute("autocomplete"),document.body.removeChild(t.sc),t=null}}}}return e}();!function(){"function"==typeof define&&define.amd?define("autoComplete",function(){return autoComplete}):"undefined"!=typeof module&&module.exports?module.exports=autoComplete:window.autoComplete=autoComplete}();

function _autocomplete(term, suggest) {
    //https://goodies.pixabay.com/javascript/auto-complete/demo.html
    term = term.toLowerCase();
    var choices = [''];
    var matches = [];
    for (i=0; i<choices.length; i++)
        if (~choices[i].toLowerCase().indexOf(term)) matches.push(choices[i]);
    suggest(matches);
}
function search(term, callback, resultsPerPage, page) {
    if (term != undefined) {
        resultsPerPage = resultsPerPage || 10;
        page = page || 0;
        var url = 'https://zesearch.co/search-es/87/?size=' + resultsPerPage + '&from=' + (resultsPerPage * page) + '&term=' + term;
        var q = {
            query: {
                bool: {
                    must: {
                        dis_max: {
                            queries: [
                                {
                                    match: {
                                        body: {
                                            query: term,
                                            slop: 50,
                                            cutoff_frequency: 0.001,
                                            minimum_should_match: "100%",
                                            fuzziness: "0"
                                        }
                                    }
                                },
                                {
                                    match: {
                                        title: {
                                            query: term,
                                            boost: 2,
                                            slop: 0,
                                            cutoff_frequency: 0.001,
                                            minimum_should_match: "50%",
                                            fuzziness: "0"
                                        }
                                    }
                                },
                                {
                                    match: {
                                        custom_keywords: {
                                            query: term,
                                            boost: 5,
                                            slop: 5,
                                            minimum_should_match: "50%"
                                        }
                                    }
                                }
                            ]
                        }
                    },
                    should: {
                        match: {
                            id: {
                                query: term,
                                boost: 5,
                                slop: 5,
                                fuzziness: "0"
                            }
                        }
                    }
                }
            },
            highlight: {
                require_field_match: false,
                pre_tags: ["<mark>"],
                post_tags: ["</mark>"],
                fragment_size: 80,
                no_match_size: 200,
                fields: {
                    description: {number_of_fragments: 0},
                    og_description: {number_of_fragments: 0},
                    twitter_description: {number_of_fragments: 0},
                    title: {number_of_fragments: 0},
                    body: {number_of_fragments: 2}
                }
            },
            stored_fields: ['id'],
            _source: ['title', 'date']
        };
        var request = new XMLHttpRequest();
        request.open('POST', url, true);
        request.setRequestHeader('Content-Type', 'application/json');
        request.send(JSON.stringify(q));
        request.onload = function(e) {
            if (request.status == 404) {
                callback({
                    currentPage: 0,
                    resultsPerPage: resultsPerPage,
                    numPages: 0,
                    took: 0,
                    total: 0,
                    hits: []
                });
            }
            else {
                var searchFunction = function(resultsPerPage, page) {
                    search(term, callback, resultsPerPage, page);
                };
                var rawResults = JSON.parse(request.responseText);
                var givenResults = rawResults.hits;
                givenResults.currentPage = page;
                givenResults.resultsPerPage = resultsPerPage;
                givenResults.numPages = Math.trunc(givenResults.total / givenResults.resultsPerPage) + 1;
                for (var i = 0; i < givenResults.hits.length; i++) {
                    var hit = givenResults.hits[i];
                    hit.url = hit._id;
                    var highlight = hit.highlight;
                    if (highlight.body) {
                        highlight.fragment = highlight.body;
                    }
                    if (highlight.description) {
                        highlight.body = highlight.description;
                    }
                    else if (highlight.og_description) {
                        highlight.body = highlight.og_description;
                    }
                    else if (highlight.twitter_description) {
                        highlight.body = highlight.twitter_description;
                    }
                }
                callback(givenResults, searchFunction);
            }
        };
    }
}