// Skonto wird an der Bankzuordnung gespeichert (cashDiscountAmount, gleiches Vorzeichen wie amount).
// Zahlbetrag und Skonto gleichen den Beleg gemeinsam aus; der Bankumsatz selbst enthält nur amount.

export const CASH_DISCOUNT_RATES = ["19", "7", "0"] as const

export const DEFAULT_CASH_DISCOUNT_ACCOUNTS = {
    received: { "19": "3736", "7": "3731", "0": "3730" },
    granted: { "19": "8736", "7": "8731", "0": "8730" },
}

export const getAllocationCashDiscount = (allocation: any) => Number(allocation?.cashDiscountAmount || 0)

export const getAllocationSettledAmount = (allocation: any) =>
    Number(allocation?.amount || 0) + getAllocationCashDiscount(allocation)

export const sumSettledAllocations = (allocations: any[] = []) =>
    (allocations || []).reduce((sum, allocation) => sum + getAllocationSettledAmount(allocation), 0)

export const hasCashDiscount = (allocation: any) =>
    !allocation?.archived && Array.isArray(allocation?.cashDiscountSplit) && allocation.cashDiscountSplit.length > 0

// Steuerkorrektur nach § 17 UStG im Zeitraum der Zahlung.
// Ausgangsbelege mindern die Umsatzsteuer, Eingangsbelege die Vorsteuer (Vorzeichen aus der Zahlung).
export function getCashDiscountTaxBreakdown(allocation: any) {
    const output = { net19: 0, tax19: 0, net7: 0, tax7: 0, net0: 0 }
    const input = { ...output }
    if (!hasCashDiscount(allocation)) return { output, input }

    const isOutgoing = Boolean(allocation.createddocument || allocation.cd_id)
    const target = isOutgoing ? output : input
    const sign = isOutgoing ? -1 : 1

    for (const item of allocation.cashDiscountSplit) {
        const net = Number(item?.net || 0) * sign
        const tax = Number(item?.tax || 0) * sign
        if (Number(item?.rate) === 19) {
            target.net19 += net
            target.tax19 += tax
        } else if (Number(item?.rate) === 7) {
            target.net7 += net
            target.tax7 += tax
        } else {
            target.net0 += net
        }
    }
    return { output, input }
}

export const resolveCashDiscountAccounts = (config: any) => {
    const result = {
        received: { ...DEFAULT_CASH_DISCOUNT_ACCOUNTS.received },
        granted: { ...DEFAULT_CASH_DISCOUNT_ACCOUNTS.granted },
    }
    for (const side of ["received", "granted"] as const) {
        for (const rate of CASH_DISCOUNT_RATES) {
            const value = config?.[side]?.[rate]
            if (value !== undefined && value !== null && String(value).trim()) result[side][rate] = String(value).trim()
        }
    }
    return result
}