// Fetch a known query parameter from the pages URL
async function getQuery(param) {
    var params = new URLSearchParams(window.location.search)
    var query = params.get(param)
    if (query) {
        return query
    } else {
        return 'false'
    }
}

// Set page headers
async function setHeaders(title,time) {
    var prefix = `OwlBoard - `
    document.title = `${prefix}${title}`
    document.getElementById("stn_name").innerHTML = title
    document.getElementById("fetch_time").innerHTML = time.toLocaleTimeString()
}

// Determine what should display in 'platform' column
async function parsePlatform(svc){
    if (svc.platform != undefined) {
        var platform = svc.platform;
    } else {
        var platform = "-";
    }
    if (svc.platformChanged) {
        var changed = "changed";
    } else {
        var changed = "";
    }
    return {num: platform, change: changed}
}

// Use different time strings to default to make better on small screens
async function parseTime(string){
    switch (string) {
        case "Delayed":
            var output = "LATE";
            var change = "changed";
            break;
        case "Cancelled":
            var output = "CANC";
            var change = "cancelled";
            break;
        case "On time":
            var output = "RT";
            var change = "";
            break;
        case "":
            var output = "-";
            var change = "";
            break;
        case undefined:
            var output = "-";
            var change = "";
            break;
        case "No report":
            var output = "?";
            var change = "";
            break;
        default:
            var output = string;
            var change = "changed";
    }
    return {data: output, changed: change};
}

// Sometimes the origin or destination names are undefined, need to catch that
async function parseName(location) {
    if (Array.isArray(location)) {
        var name = `${location[0]['locationName']} & ${location[1]['locationName']}`
        return name;
    }
    else {
        return location.locationName;
    }
}

// Build calling list:
async function buildCallLists(data) {
    console.log(JSON.stringify(data))
    if (data.previousCallingPoints.callingPointList.callingPoint) {
        var preCallPoint = data.previousCallingPoints.callingPointList.callingPoint;
    }
    if (data.subsequentCallingPoints.callingPointList.callingPoint) {
        var postCallPoint = data.subsequentCallingPoints.callingPointList.callingPoint;
    }
    var procPre = "";
    var procPost = "";
    if (preCallPoint) {
        for(var i = 0; i < preCallPoint.length; i++) {
            var proc = await buildCalls(preCallPoint[i]);
            procPre = `${procPre}\n${proc}`
        }
    }
    if (postCallPoint) {
        for (var i = 0; i < postCallPoint.length; i++) {
            var proc = await buildCalls(postCallPoint[i]);
            procPost = `${procPost}\n${proc}`
        }
    }
    console.log(JSON.stringify(procPre))
    console.log(JSON.stringify(procPost))
    var div = `
            <div class="call-data" id="${data.serviceID}">
              <p class="close-data" onclick="hideCalls('${data.serviceID}')">X</p>
              <table class="calling-at">
                <caption>Calling at:</caption>
                <tr>
                  <th class="detail-name-head">Location</th>
                  <th class="time">Schedule</th>
                  <th class="time">Exp.</th>
                </tr>
                ${procPost}
              </table>
              <table class="called-at">
                <caption>Previous stops:</caption>
                <tr>
                  <th class="detail-name-head">Location</th>
                  <th class="time">Schedule</th>
                  <th class="time">Actual</th>
                </tr>
                ${procPre}
              </table>
            </div>`
    document.body.insertAdjacentHTML("beforeend", div)
    return;
}

// Display calling list:
async function showCalls(id) {
    document.getElementById(id).style = "display: block;";
    return;
}

async function hideCalls(id) {
    document.getElementById(id).style = "display: none;";
    return;
}

// Display Alert Messages
async function displayAlerts(array) {
    var counter = 0
    for(var i = 0; i < array.length; i++) {
        // Increment counter
        counter += 1;
        // Reset Vars
        var msg = array[i];
        console.log(`Alert: ${msg}`);
        document.getElementById("alerts_msg").insertAdjacentHTML("beforeend", `<p>${msg}</p>`);
    }
    if (counter == 1) {
        document.getElementById("alert_bar_note").innerHTML = `There is ${counter} active alert`
    } else if (counter > 1) {
        document.getElementById("alert_bar_note").innerHTML = `There are ${counter} active alerts`

    }
    document.getElementById("alerts").style = "display:block"
    document.getElementById("alerts_bar").style = "display:block"
    document.getElementById("output").style = "margin-top:95px" // Adjust margin of train table div.
}

async function inflateAlerts() {
    document.getElementById("alerts_msg").style = "display:block;";
    document.getElementById("alert_expand_arrow").style = "transform: rotate(180deg);";
    document.getElementById("alerts_bar").setAttribute("onclick", "deflateAlerts()")
}

async function deflateAlerts() {
    document.getElementById("alerts_msg").style = "display.none;";
    document.getElementById("alert_expand_arrow").style = "transform: rotate(0deg);";
    document.getElementById("alerts_bar").setAttribute("onclick", "inflateAlerts()")
}

async function buildCalls(data) {
    var timeEt = await parseTime(data.et)
    return `<tr>
              <td class="detail-name">${data.locationName}</td>
              <td>${data.st}</td>
              <td>${timeEt.data}</td>
            </tr>`
}