import assert from "node:assert/strict"
import test from "node:test"
import {
    accountingTools,
    prepareStatementAllocationInput,
} from "../src/mcp/tools/accounting"

const createTool = () => accountingTools.find((tool) => tool.name === "accounting.statement_allocations.create")
const deleteTool = () => accountingTools.find((tool) => tool.name === "accounting.statement_allocations.delete")

test("registers write tools for creating and deleting statement allocations", () => {
    assert.deepEqual(createTool()?.requiredPermissions, ["accounting.statement_allocations.write"])
    assert.deepEqual(deleteTool()?.requiredPermissions, ["accounting.statement_allocations.write"])
})

test("prepares a direct bank allocation to every target type exposed by the UI", () => {
    const base = {
        bankstatement: 42,
        amount: -125.5,
        description: "Teilzahlung",
    }

    const targets = [
        ["createddocument", 11],
        ["incominginvoice", 12],
        ["account", 13],
        ["ownaccount", "57d31d62-11a2-47c5-b074-69f9c5ab8bba"],
        ["customer", 14],
        ["vendor", 15],
    ] as const

    for (const [field, value] of targets) {
        assert.deepEqual(prepareStatementAllocationInput({ ...base, [field]: value }), {
            bankstatement: 42,
            amount: -125.5,
            description: "Teilzahlung",
            bookingMode: "expense",
            [field]: value,
        })
    }
})

test("prepares depreciation metadata for direct account allocations", () => {
    assert.deepEqual(prepareStatementAllocationInput({
        bankstatement: 42,
        amount: -1200,
        account: 13,
        bookingMode: "depreciation_bundle",
        depreciationMonths: 60,
        depreciationStartDate: "2026-08-01",
        depreciationMethod: "degressive",
        depreciationLabel: "Werkzeug",
        depreciationGroup: "BGA 2026",
        residualValue: 100,
    }), {
        bankstatement: 42,
        amount: -1200,
        account: 13,
        bookingMode: "depreciation_bundle",
        depreciationMonths: 60,
        depreciationStartDate: "2026-08-01",
        depreciationMethod: "degressive",
        depreciationLabel: "Werkzeug",
        depreciationGroup: "BGA 2026",
        residualValue: 100,
    })
})

test("prepares manual Soll/Haben bookings including incoming invoices", () => {
    assert.deepEqual(prepareStatementAllocationInput({
        manualBookingDate: "2026-08-31",
        amount: 99.95,
        incominginvoice: 7,
        manualInvoiceSide: "debit",
        contraOwnaccount: "57d31d62-11a2-47c5-b074-69f9c5ab8bba",
        datevTaxKey: "9",
        description: "Manuelle Buchung",
    }), {
        bankstatement: null,
        manualBookingDate: "2026-08-31",
        amount: 99.95,
        incominginvoice: 7,
        manualInvoiceSide: "debit",
        contraOwnaccount: "57d31d62-11a2-47c5-b074-69f9c5ab8bba",
        datevTaxKey: "9",
        description: "Manuelle Buchung",
        bookingMode: "expense",
    })
})

test("rejects ambiguous bank targets and invalid manual booking sides", () => {
    assert.throws(
        () => prepareStatementAllocationInput({ bankstatement: 42, amount: 10, account: 1, vendor: 2 }),
        /genau ein Ziel/,
    )
    assert.throws(
        () => prepareStatementAllocationInput({ manualBookingDate: "2026-08-31", amount: 10, account: 1 }),
        /Soll- und ein Haben-Konto/,
    )
})

test("rejects incomplete depreciation settings", () => {
    assert.throws(
        () => prepareStatementAllocationInput({
            bankstatement: 42,
            amount: -1200,
            account: 13,
            bookingMode: "depreciation_bundle",
            depreciationMonths: 0,
            depreciationStartDate: "2026-08-01",
        }),
        /Abschreibungsdauer/,
    )
})