export const BANK_ALLOCATION_TAX_ITEMS = [
    { value: "9", label: "19 % Vorsteuer", rate: 19, kind: "input" },
    { value: "8", label: "7 % Vorsteuer", rate: 7, kind: "input" },
    { value: "3", label: "19 % Umsatzsteuer", rate: 19, kind: "output" },
    { value: "2", label: "7 % Umsatzsteuer", rate: 7, kind: "output" },
    { value: "40", label: "Ohne Umsatzsteuer", rate: 0, kind: "none" },
]

export const isDirectBankAllocation = (allocation: any) => Boolean(
    allocation?.bankstatement && (allocation.account || allocation.ownaccount)
    && !allocation.createddocument && !allocation.incominginvoice
    && !allocation.customer && !allocation.vendor && !allocation.archived
)

// The signed bank amount always remains gross. Refunds retain their sign.
export function getBankAllocationAmounts(allocation: any) {
    const amountGross = Number(allocation?.amount || 0)
    const tax = isDirectBankAllocation(allocation)
        ? BANK_ALLOCATION_TAX_ITEMS.find(item => item.value === String(allocation.datevTaxKey))
        : undefined
    const rate = tax?.rate || 0
    const amountNet = Number((amountGross / (1 + rate / 100)).toFixed(2))
    const amountTax = Number((amountGross - amountNet).toFixed(2))
    return { amountGross, amountNet, amountTax, rate, kind: tax?.kind || "none" }
}

export function getBankAllocationTaxBreakdown(allocation: any) {
    const output = { net19: 0, tax19: 0, net7: 0, tax7: 0, net0: 0 }
    const input = { ...output }
    if (!isDirectBankAllocation(allocation)) return { output, input }
    const { amountNet, amountTax, rate, kind } = getBankAllocationAmounts(allocation)
    if (kind === "none") return { output, input }
    const target = kind === "input" ? input : output
    const sign = kind === "input" ? -1 : 1
    if (rate === 19) {
        target.net19 = amountNet * sign
        target.tax19 = amountTax * sign
    } else if (rate === 7) {
        target.net7 = amountNet * sign
        target.tax7 = amountTax * sign
    }
    return { output, input }
}