import { describe, expect, it } from "vitest";
import {
  TRANSFER_DELIVERY_KEYS,
  deliveredKeys,
  findLeaderSide,
  isLeaderDeliveryDue,
  transferDecisionRow,
} from "@/bot/lib/transferMessaging";
import type { AssignmentTransfer } from "@/payload-types";

const transfer = (overrides: Partial<AssignmentTransfer> = {}): AssignmentTransfer => ({
  id: 42,
  requester: 10,
  fromAssignment: 20,
  toAssignment: 30,
  status: "pending",
  fromLeaderDecision: "pending",
  toLeaderDecision: "pending",
  updatedAt: "2026-08-31T00:00:00.000Z",
  createdAt: "2026-08-31T00:00:00.000Z",
  ...overrides,
});

describe("assignment-transfer Discord helpers", () => {
  it("requires a fresh leader DM when leadership changes", () => {
    // Given
    const request = transfer({
      discordDeliveredKeys: [TRANSFER_DELIVERY_KEYS.requestFrom],
      sourceNotifiedToUserId: 100,
    });

    // When
    const due = isLeaderDeliveryDue(request, "from", 101);

    // Then
    expect(due).toBe(true);
  });

  it("skips a leader DM only when its key and recipient both match", () => {
    // Given
    const request = transfer({
      discordDeliveredKeys: [TRANSFER_DELIVERY_KEYS.requestTo],
      destinationNotifiedToUserId: 200,
    });

    // When
    const due = isLeaderDeliveryDue(request, "to", 200);

    // Then
    expect(due).toBe(false);
  });

  it("chooses the actor's still-pending current-leader side", () => {
    // Given
    const request = transfer({ fromLeaderDecision: "approved" });

    // When
    const check = findLeaderSide(request, 100, 200, 200);

    // Then
    expect(check).toEqual({ outcome: "authorized", side: "to" });
  });

  it("marks stale leaders as unauthorized", () => {
    // Given
    const request = transfer();

    // When
    const check = findLeaderSide(request, 101, 200, 100);

    // Then
    expect(check).toEqual({ outcome: "not_leader" });
  });

  it("renders the transfer custom-id contract", () => {
    // Given
    const row = transferDecisionRow(42);

    // When
    const customIds = row.toJSON().components.map((component) =>
      "custom_id" in component ? component.custom_id : null,
    );

    // Then
    expect(customIds).toEqual(["ptf-xfer:42:approve", "ptf-xfer:42:reject"]);
  });

  it("narrows malformed delivery-ledger JSON to an empty list", () => {
    // Given
    const request = transfer({ discordDeliveredKeys: { invalid: true } });

    // When
    const keys = deliveredKeys(request);

    // Then
    expect(keys).toEqual([]);
  });
});