//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();
};
//Any global variables go here


//Main is hard wired as THE place to start calculating when input changes
//It does no calculations itself, it merely sets them up, sends off variables, gets results and, if necessary, plots them.
function Main() {
    saveSettings();

    //Send all the inputs as a structured object
    //If you need to convert to, say, SI units, do it here!
    const NuCorrection = 1 - Math.pow(0.3, 2) //Assume Poisson is 0.3
    const inputs = {
        T1: sliders.SlideT1.value,
        T2: sliders.SlideT2.value,
        E1: sliders.SlideE1.value * 1e9 / NuCorrection, //GPa to Pa
        E2: sliders.SlideE2.value * 1e9 / NuCorrection,
        h1: sliders.Slideh1.value / 1e6, //μm to m
        h2: sliders.Slideh2.value / 1e6,
        CTE1: sliders.SlideCTE1.value / 1e6, //μm to m
        CTE2: sliders.SlideCTE2.value / 1e6,
        CHE1: sliders.SlideCHE1.value / 1e6, //μm to m
        CHE2: sliders.SlideCHE2.value / 1e6,
        dT: sliders.SlideDeltaT.value,
        dH: sliders.SlideDeltaH.value,
    }

    //Get all the resonses as a structure
    const result = CalcIt(inputs)

    //Set all the text box outputs
    document.getElementById('Strain1').value = result.Strain1
    document.getElementById('Strain2').value = result.Strain2
    document.getElementById('Curl').value = result.Curl
}

//Here's the real app calculation
function CalcIt({ T1, T2, E1, E2, h1, h2, CTE1, CTE2, CHE1, CHE2, dT, dH }) {
    const deltaTH=1.3*(dT * CTE1 + dH * CHE1-dT * CTE2 - dH * CHE2)
    const Strain1 = T1 / E1 / h1 
    const Strain2 = T2 / E2 / h2 
    let Curl = "Flat", TheCurl=-99999
    const D1 = E1 * Math.pow(h1, 3) / 12
    const D2 = E2 * Math.pow(h2, 3) / 12
    const Top = 2 * (D1 + D2)
    const H12 = h1 + h2
    const tmp = (Strain1 - Strain2-deltaTH) / (1 / (E1 * h1) + 1 / (E2 * h2) + H12 * H12 / (2 * Top))

    if (tmp != 0) TheCurl = 1000*Top / (H12 * tmp)
    if (TheCurl > 999 || TheCurl < -999) {Curl = "Flat"} else {Curl=TheCurl.toFixed(0)}
    return {
        Strain1: (100 * Strain1).toPrecision(3),
        Strain2: (100 * Strain2).toPrecision(3),
        Curl: Curl,
    }
}