/* JSONListModel - a QML ListModel with JSON and JSONPath support
 *
 * Copyright (c) 2012 Romain Pokrzywka (KDAB) (romain@kdab.com)
 * Licensed under the MIT licence (http://opensource.org/licenses/mit-license.php)
 */

import QtQuick 2.0
import "../js/jsonpath.js" as JSONPath

Item {
    property string source: ""
    property string json: ""
    property string query: ""
    property bool jsonready: true
    property bool modelready: true
    property bool prev: false
    property bool next: false
    property string sortby: ""
    //property string filterby: ""
    //property string filterkey: ""

    property ListModel model : ListModel { id: jsonModel }
    property alias count: jsonModel.count
    //property alias get: jsonModel.get

    onSourceChanged: {
        if (source !== "") {
            jsonready = false
            modelready = false
            var xhr = new XMLHttpRequest;
            xhr.open("GET", source);
            xhr.onreadystatechange = function() {
                if (xhr.readyState === XMLHttpRequest.DONE)
                    json = xhr.responseText;
            }
            xhr.send();
        } else jsonModel.clear();
    }

    onJsonChanged: updateJSONModel()
    onQueryChanged: updateJSONModel()
    //onFilterbyChanged: updateJSONModel()
    //onFilterkeyChanged: updateJSONModel()

    function updateJSONModel() {
        jsonModel.clear();

        if ( json === "" )
            return;

        var objectArray = parseJSONString(json, query);

        if (sortby !== "") objectArray = sortByKey(objectArray, sortby);
        //if (filterby !== "" && filterkey !=="") objectArray = filterValuePart(objectArray, filterby, filterkey);

        for ( var key in objectArray ) {
            var jo = objectArray[key];
            if( jo.toString() === "[object Object]"){
                jsonModel.append( jo );
            } else {
                //this is comma separated strings
                var str = jo.toString().split(",");
                for(var i = 0; i < str.length; i++){
                    jsonModel.append({ "item": str[i] } );
                }
                break;
            }
         //   var jo = objectArray[key];
         //   jsonModel.append( jo );
         //   console.log("JSON: "+objectArray[key])
        }
        jsonready = true
    }

    function parseJSONString(jsonString, jsonPathQuery) {
        var objectArray = JSON.parse(jsonString);
        if ( jsonPathQuery !== "" )
            objectArray = JSONPath.jsonPath(objectArray, jsonPathQuery);

        return objectArray;
    }

    function filterValuePart(array, part, key) {
        part = part.toLowerCase();
        return array.filter(function(a) {
            var x = a[key];
            return x.toLowerCase().indexOf(part) !== -1;
        });
    }

    function sortByKey(array, key) {
        var res = key.split(".")
        //console.log("RES: "+res.length)
        if (res.length === 1) {
        return array.sort(function(a, b) {
            var x = a[res[0]]; var y = b[res[0]];
            return ((x > y) ? -1 : ((x < y) ? 1 : 0));
        });
        } else {
            return array.sort(function(a, b) {
                var x = a[res[0]][res[1]]; var y = b[res[0]][res[1]];
                return ((x > y) ? -1 : ((x < y) ? 1 : 0));
            });
        }
    }
}