export function apply_guidance(doc: any) {

    const targetPrice = doc.pricing?.v1tp ?? doc.pricing?.v0tp;
    const earlyPrice = doc.hist?.cust?.early_price;
    const earlySeason = doc.hist?.cust?.early_season;
    const bridgePremium = doc.pricing?.bridgePremium ?? 1.00000;
    const altHist = doc.hist?.cust?.ds;
    const iidx = doc.pricing?.iidx;
    const list = doc.pricing?.list;
    const curr = doc.customer?.curr;
    const fxrate = doc.customer?.fxrate;
    let   anchorPrice = null;
    let   anchorSource = null;
    let   guidance = {};
    let   calcCeiling = null;
    let   finalReason = "";
    let   finalPrice = null;
    const inflation = Math.max(...Object.keys(iidx).map(Number));
    const inflationFactor = iidx[inflation] + 1;
    // ------if there is not target price just exit---------------
    if (!targetPrice) {
        anchorSource = "No target pricing setup";
        guidance.FinalReason = "No target pricing setup";
    } else {
        // if there is no customer anchor price use target
        if (earlyPrice) {
            // translate alternate product history to current product quoted
            anchorPrice = Number((earlyPrice * bridgePremium).toFixed(5));
            // --------if the price needs bridged, add the details to the description--------
            if (bridgePremium === 1) {
                anchorSource = earlySeason + ' Customer Price ' + earlyPrice;
            } else {
                anchorSource = earlySeason + ' Similar (' + altHist + ') Customer Price ' + earlyPrice + ' x ' + bridgePremium + ' = ' + anchorPrice;
            }
            // --------after the early price is translated see if target is still less-------
            if (targetPrice < anchorPrice) {
                anchorSource = `Target Price ${targetPrice}`;
                anchorPrice = targetPrice;
            }
        } else {
            anchorPrice = targetPrice;
            anchorSource = `Target Price ${targetPrice}`;
        }
        //------get the most relevant inflation factor number---------------------------------
        //------extract the inflation factor using the relevance key--------------------------
        let   calcPrice = parseFloat((anchorPrice * inflationFactor).toFixed(5));
        if (calcPrice >= list && list) {
            calcCeiling = "Cap At List";
            finalPrice = doc.list;
            finalReason = `${anchorSource} x ${inflationFactor} = ${calcPrice} but cap at list ${list}`;
        } else {
            finalPrice = calcPrice;
            finalReason = `${anchorSource} x ${inflationFactor} = ${calcPrice}`;
        }
    }
    guidance.AnchorPrice = anchorPrice;
    guidance.AnchorSource = anchorSource;
    guidance.InflationFactor = inflationFactor;
    guidance.Ceiling = calcCeiling;
    guidance.FinalPrice = finalPrice;
    guidance.FinalReason = finalReason;
    guidance.BridgePremium = bridgePremium;
    guidance.TargetPrice = targetPrice;
    doc.guidance = guidance;
    return doc;
}