export function apply_guidance(doc: any) {

    const targetPrice = doc.v1tp ?? doc.v0tp;
    const earlyPrice = doc.hist?.cust?.early_price;
    let   anchorPrice = null;
    let   anchorSource = null;
    let   bridgePremium = doc.bridgePremium ?? 1.00000;
    // ------if there is not target price just exit---------------
    if (!targetPrice) {
        anchorSource = "No target pricing setup";
        doc.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 = doc.hist.cust.early_season + ' Customer Price ' + earlyPrice;
            } else {
                anchorSource = doc.hist.cust.early_season + ' Similar (' + doc.hist.cust.ds + ') Customer Price ' + earlyPrice + ' x ' + doc.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 ${targetPrice}`;
        }
        //------get the most relevant inflation factor number---------------------------------
        const inflation = Math.max(...Object.keys(doc.iidx).map(Number));
        //------extract the inflation factor using the relevance key--------------------------
        const inflationFactor = doc.iidx[inflation] + 1;
        let   calcPrice = parseFloat((anchorPrice * inflationFactor).toFixed(5));
        let   finalReason = "";
        if (calcPrice >= doc.list && doc.list) {
            doc.calcCeiling = "Cap At List";
            doc.finalPrice = doc.list;
            finalReason = `${anchorSource} x ${inflationFactor} = ${calcPrice} but cap at list ${doc.list}`;
        } else {
            doc.finalPrice = calcPrice;
            finalReason = `${anchorSource} x ${inflationFactor} = ${calcPrice}`;
        }
        doc.anchorPrice = anchorPrice;
        doc.anchorSource = anchorSource;
        doc.inflationFactor = inflationFactor;
        doc.finalReason = finalReason;
        doc.bridgePremium = bridgePremium;
        doc.targetPrice = targetPrice;
    }
    return doc;
}