/**
 * Integration tests for the Crewing Phase 3c onboarding action. Onboarding is the
 * side-effecting transaction off a SELECTED application (assignment + employeeId +
 * salary binding + requisition FILLED + crew EMPLOYEE).
 */
import { vi, describe, it, expect, beforeAll, afterAll, afterEach } from "vitest";

vi.mock("@/auth", () => ({ auth: vi.fn() }));
vi.mock("next/cache", () => ({ revalidatePath: vi.fn() }));
vi.mock("@/lib/feature-flags", () => ({ CREWING_ENABLED: true, INVENTORY_ENABLED: true }));
vi.mock("@/lib/notifier", () => ({ notify: vi.fn(), notifyCrew: vi.fn() }));

import { auth } from "@/auth";
import { db } from "@/lib/db";
import { onboardCandidate } from "@/app/(portal)/crewing/applications/actions";
import { makeSession, getSeedUser, fd } from "./helpers";
import type { Role } from "@prisma/client";

let managerId: string;
let siteStaffId: string;
let rankId: string;
let vesselId: string;

const SS_EMAIL = "sitestaff@itonb.local";
const as = (userId: string, role: Role) =>
  vi.mocked(auth as unknown as () => Promise<unknown>).mockResolvedValue(makeSession(userId, role));

let seq = 0;
async function selectedApplication() {
  seq += 1;
  const req = await db.requisition.create({ data: { code: `REQ-O${seq}`, rankId, vesselId, reason: "NEW_VACANCY", status: "SELECTED" } });
  const cand = await db.crewMember.create({ data: { name: "Selected Sam", type: "NEW", status: "CANDIDATE", source: "CAREERS", appliedRankId: rankId } });
  const app = await db.application.create({ data: { requisitionId: req.id, crewMemberId: cand.id, stage: "SELECTED", type: "NEW" } });
  await db.salaryStructure.create({ data: { applicationId: app.id, rateBasis: "MONTHLY", basic: 50000, approvedById: managerId } });
  return { appId: app.id, reqId: req.id, candId: cand.id };
}

beforeAll(async () => {
  managerId = (await getSeedUser("manager@pelagia.local")).id;
  const ss = await db.user.upsert({ where: { email: SS_EMAIL }, update: { role: "SITE_STAFF", isActive: true }, create: { employeeId: "ITONB-SS", email: SS_EMAIL, name: "SS Onb", role: "SITE_STAFF" } });
  siteStaffId = ss.id;
  rankId = (await db.rank.findFirstOrThrow()).id;
  vesselId = (await db.vessel.findFirstOrThrow()).id;
});

afterEach(async () => {
  await db.contractLetter.deleteMany({});
  await db.crewAction.deleteMany({});
  await db.salaryStructure.deleteMany({});
  await db.applicationGate.deleteMany({});
  await db.referenceCheck.deleteMany({});
  await db.crewAssignment.deleteMany({});
  await db.application.deleteMany({});
  await db.bankDetail.deleteMany({});
  await db.epfDetail.deleteMany({});
  await db.requisition.deleteMany({});
  await db.crewMember.deleteMany({});
  vi.clearAllMocks();
});

afterAll(async () => {
  await db.user.deleteMany({ where: { email: SS_EMAIL } });
});

describe("onboardCandidate", () => {
  it("onboards a SELECTED candidate end-to-end in one transaction", async () => {
    const { appId, reqId, candId } = await selectedApplication();
    as(managerId, "MANAGER");
    const res = await onboardCandidate(fd({ applicationId: appId, joiningDate: "2026-07-01" }));
    expect("ok" in res && res.ok).toBe(true);

    const assignment = await db.crewAssignment.findFirstOrThrow({ where: { crewMemberId: candId } });
    expect(assignment.status).toBe("ACTIVE");
    expect(assignment.requisitionId).toBe(reqId);
    expect(assignment.rankId).toBe(rankId);

    const cm = await db.crewMember.findUniqueOrThrow({ where: { id: candId } });
    expect(cm.status).toBe("EMPLOYEE");
    expect(cm.employeeId).toMatch(/^CRW-\d+$/);
    expect(cm.currentRankId).toBe(rankId);

    expect((await db.application.findUniqueOrThrow({ where: { id: appId } })).stage).toBe("ONBOARDED");
    expect((await db.requisition.findUniqueOrThrow({ where: { id: reqId } })).status).toBe("FILLED");

    const sal = await db.salaryStructure.findFirstOrThrow({ where: { applicationId: appId } });
    expect(sal.assignmentId).toBe(assignment.id);
    expect(sal.effectiveFrom).not.toBeNull();

    const action = await db.crewAction.findFirstOrThrow({ where: { actionType: "CREW_ONBOARDED" } });
    expect(action.actorId).toBe(managerId);
    // D3 AC2: the audit row records the created IDs in metadata.
    const meta = action.metadata as { assignmentId?: string; employeeId?: string; salaryStructureId?: string } | null;
    expect(meta?.assignmentId).toBe(assignment.id);
    expect(meta?.employeeId).toBe(cm.employeeId);
    expect(meta?.salaryStructureId).toBe(sal.id);
  });

  it("blocks onboarding when no salary structure is Manager-approved (D1)", async () => {
    seq += 1;
    const req = await db.requisition.create({ data: { code: `REQ-O${seq}`, rankId, vesselId, reason: "NEW_VACANCY", status: "SELECTED" } });
    const cand = await db.crewMember.create({ data: { name: "Unapproved Sal", type: "NEW", status: "CANDIDATE", source: "CAREERS", appliedRankId: rankId } });
    const appRow = await db.application.create({ data: { requisitionId: req.id, crewMemberId: cand.id, stage: "SELECTED", type: "NEW" } });
    // Salary agreed but NOT Manager-approved (approvedById null).
    await db.salaryStructure.create({ data: { applicationId: appRow.id, rateBasis: "MONTHLY", basic: 40000 } });

    as(managerId, "MANAGER");
    const res = await onboardCandidate(fd({ applicationId: appRow.id, joiningDate: "2026-07-01" }));
    expect("error" in res).toBe(true);
    expect(await db.crewAssignment.count()).toBe(0);
    // The candidate is untouched — still a CANDIDATE, no employee number.
    const after = await db.crewMember.findUniqueOrThrow({ where: { id: cand.id } });
    expect(after.status).toBe("CANDIDATE");
    expect(after.employeeId).toBeNull();
  });

  it("requires a joining date", async () => {
    const { appId } = await selectedApplication();
    as(managerId, "MANAGER");
    const res = await onboardCandidate(fd({ applicationId: appId }));
    expect("error" in res).toBe(true);
    expect(await db.crewAssignment.count()).toBe(0);
  });

  it("only onboards from SELECTED", async () => {
    const { appId } = await selectedApplication();
    await db.application.update({ where: { id: appId }, data: { stage: "INTERVIEW" } });
    as(managerId, "MANAGER");
    const res = await onboardCandidate(fd({ applicationId: appId, joiningDate: "2026-07-01" }));
    expect("error" in res).toBe(true);
    expect(await db.crewAssignment.count()).toBe(0);
  });

  it("is rejected for roles without onboard_crew (site staff, accounts)", async () => {
    const { appId } = await selectedApplication();
    as(siteStaffId, "SITE_STAFF");
    expect(await onboardCandidate(fd({ applicationId: appId, joiningDate: "2026-07-01" }))).toEqual({ error: "Unauthorized" });
    as(managerId, "ACCOUNTS");
    expect(await onboardCandidate(fd({ applicationId: appId, joiningDate: "2026-07-01" }))).toEqual({ error: "Unauthorized" });
    expect(await db.crewAssignment.count()).toBe(0);
  });

  it("assigns sequential CRW- employee numbers", async () => {
    const a = await selectedApplication();
    const b = await selectedApplication();
    as(managerId, "MANAGER");
    await onboardCandidate(fd({ applicationId: a.appId, joiningDate: "2026-07-01" }));
    await onboardCandidate(fd({ applicationId: b.appId, joiningDate: "2026-07-02" }));
    const ids = (await db.crewMember.findMany({ where: { employeeId: { not: null } }, select: { employeeId: true } })).map((c) => c.employeeId);
    expect(new Set(ids).size).toBe(2);
    expect(ids.every((i) => /^CRW-\d+$/.test(i!))).toBe(true);
  });
});