var xmlDoc;
function loadJSON(inFile, callback)
{
    var xobj = new XMLHttpRequest();
    // Assume XML unless filename ends with .json
    if (inFile.endsWith(".json"))
    {
        xobj.overrideMimeType("application/json");
    }
    xobj.open('GET', inFile, true);
    xobj.onreadystatechange = function()
    {
        if (xobj.readyState == 4 && xobj.status == "200")
        {
            callback(xobj.responseText);
        }
    };
    // We want ajax to ignore any cached responses
    xobj.setRequestHeader('If-Modified-Since', 'Sat, 01 Jan 2000 01:01:01 GMT')
    xobj.send(null);
}

function parseXml(response)
{
        var parser = new DOMParser();
        xmlDoc = parser.parseFromString(response,"text/xml");
        var eventTags = xmlDoc.getElementsByTagName("SCRIPT_EVENT");

        // Process each event tag
        for (var i = 0; i < eventTags.length; i++)
        {
            var currEvt = eventTags[i];
            // Process all the children of one event
            var timeFields; var evtTime; var incidentNum; var cadProp; var telProp;
            var proparray = new Array();
            var evalarray = new Array();
            for (var child = 1; child < currEvt.childNodes.length; child++)
            {
                if (currEvt.childNodes[child].localName != undefined)
                {
                    switch(currEvt.childNodes[child].localName)
                    {
                        case "TIME_INDEX": 
                            timeFields = currEvt.childNodes[child].textContent.split(":"); 
                            evtTime = new Time(Number(timeFields[0]), Number(timeFields[1]), Number(timeFields[2]));
                            break;
                        case "INCIDENT":
                            incidentNum = Number(currEvt.childNodes[child].attributes["LogNum"].value); 
                            break;
                        case "CAD_DATA": 
                            var caddata = parseCAD(currEvt.childNodes[child]); 
                            if (caddata.length > 0)
                            {
                                cadProp = new Property("CHP CAD", caddata ); 
                                proparray.push(cadProp);
                            }
                            break;
                        case "TELEPHONE": 
                            telProp = new Evaluation("Telephone Conversation", 
                                     parseTelephone(currEvt.childNodes[child]) );  
                            evalarray.push(telProp);
                            break;
                    }
                }
            }
            //console.log(evtTime.format(), incidentNum, proparray.length, evalarray.length);
            if (incidentNum != undefined)
            {
              events.add(new Event(evtTime, incidents.get(incidentNum), new Properties(proparray), 
                    new Evaluations(evalarray)) );
            }
        }

}
function parseCAD(element)
{
    var result = new Array();
    var details = element.getElementsByTagName("DETAIL");
    if (details.length > 0)
    {
        for (detail in details)
        {
            if (details[detail].textContent != undefined)
            {                
                result.push("Detail:");
                result.push(details[detail].textContent);
            }
        }
    }
    return result;
}
function parseTelephone(element)
{
    var result = new Array();
    for (var child = 1; child < element.childNodes.length; child++)
    {
        if (element.childNodes[child].localName != undefined)
        {
            if (element.childNodes[child].localName == "INSTRUCTOR")
            {
                result.push(element.childNodes[child].attributes["Role"].value);
            }
            else
            {
                result.push(element.childNodes[child].localName);   
            }
            result.push(element.childNodes[child].textContent);
        }
    }
    return result;
}

// MAIN
loadJSON("full_script.xml", parseXml)