import assert from "node:assert/strict"
import test from "node:test"
import {
    applyAccountCostCentreAssignments,
    normalizeAccountCostCentreAssignments,
} from "../src/modules/incoming-invoice-cost-centres.service"
import { mcpToolMap } from "../src/mcp/registry"

const CENTRE = "8f1c2b3a-4d5e-4f60-8a7b-9c0d1e2f3a4b"

test("changes only requested account cost centres", () => {
    const accounts = [
        { account: 1, amountNet: 100, taxType: "19", costCentre: "old-1" },
        { account: 2, amountNet: 50, taxType: "7", costCentre: "old-2" },
    ]

    assert.deepEqual(applyAccountCostCentreAssignments(accounts, [
        { index: 1, costcentre: CENTRE },
    ]), [
        accounts[0],
        { account: 2, amountNet: 50, taxType: "7", costCentre: CENTRE },
    ])
})

test("rejects assignments for unknown invoice positions", () => {
    assert.throws(
        () => applyAccountCostCentreAssignments([{ account: 1 }], [{ index: 3, costcentre: null }]),
        /Position 4.*nicht gefunden/,
    )
})

test("validates cost centre assignments", () => {
    assert.throws(() => normalizeAccountCostCentreAssignments([]), /Mindestens eine/)
    assert.throws(() => normalizeAccountCostCentreAssignments([{ index: -1, costcentre: null }]), /gültigen index/)
    assert.throws(() => normalizeAccountCostCentreAssignments([{ index: 0, costcentre: "x" }]), /Ungültige Kostenstelle/)
    assert.throws(
        () => normalizeAccountCostCentreAssignments([{ index: 0, costcentre: null }, { index: 0, costcentre: CENTRE }]),
        /mehrfach/,
    )
    assert.deepEqual(normalizeAccountCostCentreAssignments([{ index: 0, costcentre: CENTRE }]), [{ index: 0, costcentre: CENTRE }])
})

test("registers a dedicated incoming invoice cost centre tool", () => {
    const tool = mcpToolMap.get("accounting.incoming_invoices.cost_centres.update")

    assert.deepEqual(tool?.requiredPermissions, ["accounting.incoming_invoices.write"])
    assert.deepEqual(tool?.inputSchema.required, ["id", "accountCostCentres"])
})