//One universal basic required here to get things going once loaded
window.onload = function () {
    //restoreDefaultValues(); //Un-comment this if you want to start with defaults
    Main();
};

//Main() is hard wired as THE place to start calculating when inputs change
//It does no calculations itself, it merely sets them up, sends off variables, gets results and, if necessary, plots them.
function Main() {
    //Save settings every time you calculate, so they're always ready on a reload
    saveSettings();

    //Send all the inputs as a structured object
    //If you need to convert to, say, SI units, do it here!
    const inputs = {
        T1: sliders.SlideT1.value,
        T2: sliders.SlideT2.value,
        A: sliders.SlideA.value * 1e-4,  //cm2 to m2
        m: sliders.Slidem.value / 1e3, //g to kg
        Cp: sliders.SlideCp.value * 1e3, //J/gK to J/kgK
        HTCF: sliders.SlideHTCF.value,
        t: sliders.Slidet.value,
    };

    //Send inputs off to CalcIt where the names are instantly available
    //Get all the resonses as an object, result


    const result = CalcIt(inputs);

    //Set all the text box outputs
    document.getElementById('Tmax').value = result.Tmax;

    //Do all relevant plots by calling plotIt - if there's no plot, nothing happens
    //plotIt is part of the app infrastructure in app.new.js
    if (result.plots) {
        for (let i = 0; i < result.plots.length; i++) {
            plotIt(result.plots[i], result.canvas[i]);
        }
    }

    //You might have some other stuff to do here, but for most apps that's it for Main!
}

//Here's the app calculation
function CalcIt({ T1, T2, A, m, Cp, HTCF, t }) {
    const nSteps = 300
    let tNow = 0, T = T1, tinc = t / nSteps, TPlot = []
    TPlot.push({ x: 0, y: T1 })
    for (i = 0; i < nSteps; i++) {
        T += HTCF * A * (T2 - T) / Cp / m * tinc
        tNow += tinc

        TPlot.push({ x: tNow, y: T })
    }

    //Integrated/=Bzcm.length
    const plotData = [TPlot]
    const lineLabels = ["T"]
    const myColors = ["blue"]
    const borderWidth = [2]

    //Now set up all the graphing data detail by detail.
    const prmap = {
        plotData: plotData, //An array of 1 or more datasets
        lineLabels: lineLabels, //An array of labels for each dataset
        colors: myColors, //An array of colors for each dataset
        hideLegend: true,
        borderWidth: borderWidth,
        xLabel: 't&s', //Label for the x axis, with an & to separate the units
        yLabel: 'T&°C', //Label for the y axis, with an & to separate the units
        y2Label: null, //Label for the y2 axis, null if not needed
        yAxisL1R2: [], //Array to say which axis each dataset goes on. Blank=Left=1
        logX: false, //Is the x-axis in log form?
        xTicks: undefined, //We can define a tick function if we're being fancy
        logY: false, //Is the y-axis in log form?
        yTicks: undefined, //We can define a tick function if we're being fancy
        legendPosition: 'top', //Where we want the legend - top, bottom, left, right
        xMinMax: [,], //Set min and max, e.g. [-10,100], leave one or both blank for auto
        yMinMax: [,], //Set min and max, e.g. [-10,100], leave one or both blank for auto
        y2MinMax: [,], //Set min and max, e.g. [-10,100], leave one or both blank for auto
        xSigFigs: 'F1', //These are the sig figs for the Tooltip readout. A wide choice!
        ySigFigs: 'F1', //F for Fixed, P for Precision, E for exponential
    };

    //Now we return everything - text boxes, plot and the name of the canvas, which is 'canvas' for a single plot
    return {
        plots: [prmap],
        canvas: ['canvas'],
        Tmax: T.toFixed(1),
        // Emitted1: Emitted1.toPrecision(3),
        // Peak2: (Peak2*1e6).toFixed(1) + " μm",
        // Emitted2: Emitted2.toPrecision(3),
        // Flow: Flow.toPrecision(3),
    };
}