import { ErrorCode } from "@batch-cooking/shared";
import { faker } from "@faker-js/faker";
import { expect } from "chai";
import request from "supertest";
import { createApp } from "../src/app.js";
import { prisma } from "../src/db/prisma.js";
import { hashAdminPassword } from "../src/modules/admin/admin-auth.service.js";
import { resetDatabase } from "../test-support/reset-db.js";

async function seedAdmin(): Promise<{ email: string; password: string }> {
  const email = faker.internet.email().toLowerCase();
  const password = faker.internet.password({ length: 16 });
  await prisma.adminUser.create({
    data: { email, name: faker.person.fullName(), passwordHash: await hashAdminPassword(password) },
  });
  return { email, password };
}

/** A fresh, fake (never real-looking) create-user payload — same rationale as `auth.test.ts`'s `buildSignupPayload`. */
function buildCreateUserPayload() {
  const firstName = faker.person.firstName();
  const lastName = faker.person.lastName();
  return {
    firstName,
    lastName,
    email: faker.internet.email({ firstName, lastName }).toLowerCase(),
  };
}

/**
 * `/admin/api/users/*` — the admin surface for provisioning end-user
 * accounts by hand (`/admin/utilisateurs` page). Every route behind
 * `requireAdmin`. Creation generates a one-time temporary password and
 * returns it in the response; the account starts with no household, exactly
 * like a self-service signup.
 */
describe("Admin users — account provisioning", () => {
  const app = createApp();

  beforeEach(async () => {
    await resetDatabase();
  });

  after(async () => {
    await prisma.$disconnect();
  });

  async function adminAgent() {
    const { email, password } = await seedAdmin();
    const agent = request.agent(app);
    await agent.post("/admin/api/auth/login").send({ email, password });
    return agent;
  }

  it("rejects every route without an admin session", async () => {
    expect((await request(app).get("/admin/api/users")).status).to.equal(401);
    expect(
      (await request(app).post("/admin/api/users").send(buildCreateUserPayload())).status,
    ).to.equal(401);
  });

  it("creates a profile with no household and returns a one-time temporary password", async () => {
    const agent = await adminAgent();
    const payload = buildCreateUserPayload();

    const res = await agent.post("/admin/api/users").send(payload);

    expect(res.status).to.equal(201);
    expect(res.body.user).to.include({
      firstName: payload.firstName,
      lastName: payload.lastName,
      email: payload.email,
      householdName: null,
    });
    expect(res.body.user).to.not.have.property("passwordHash");
    expect(res.body.user).to.not.have.property("tokenVersion");
    expect(res.body.temporaryPassword).to.be.a("string").with.length.greaterThan(8);

    const stored = await prisma.userProfile.findUnique({ where: { email: payload.email } });
    expect(stored?.houseId).to.equal(null);
    expect(stored?.dietId).to.equal(null);
  });

  it("issues a password the new account can actually log in with", async () => {
    const agent = await adminAgent();
    const payload = buildCreateUserPayload();

    const created = await agent.post("/admin/api/users").send(payload);
    const login = await request(app)
      .post("/auth/login")
      .send({ email: payload.email, password: created.body.temporaryPassword });

    expect(login.status).to.equal(200);
    expect(login.body.email).to.equal(payload.email);
  });

  it("rejects a duplicate email with 409 EMAIL_ALREADY_IN_USE", async () => {
    const agent = await adminAgent();
    const payload = buildCreateUserPayload();
    await agent.post("/admin/api/users").send(payload);

    const res = await agent
      .post("/admin/api/users")
      .send({ ...buildCreateUserPayload(), email: payload.email });

    expect(res.status).to.equal(409);
    expect(res.body.code).to.equal(ErrorCode.EMAIL_ALREADY_IN_USE);
  });

  it("rejects an invalid body with 400 VALIDATION_ERROR", async () => {
    const agent = await adminAgent();

    const badEmail = await agent
      .post("/admin/api/users")
      .send({ ...buildCreateUserPayload(), email: "not-an-email" });
    expect(badEmail.status).to.equal(400);
    expect(badEmail.body.code).to.equal(ErrorCode.VALIDATION_ERROR);

    const noFirstName = await agent
      .post("/admin/api/users")
      .send({ ...buildCreateUserPayload(), firstName: "" });
    expect(noFirstName.status).to.equal(400);
  });

  it("lists accounts newest-first with their household name resolved, never the password", async () => {
    const agent = await adminAgent();
    const first = buildCreateUserPayload();
    const second = buildCreateUserPayload();
    const firstRes = await agent.post("/admin/api/users").send(first);
    await agent.post("/admin/api/users").send(second);

    // Put the first account in a household so `householdName` has something to
    // resolve — `House.adminId` is required, so the account is its own admin.
    const house = await prisma.house.create({
      data: {
        name: "Le Foyer Test",
        adminId: firstRes.body.user.id,
        inviteCode: faker.string.alphanumeric(8).toUpperCase(),
      },
    });
    await prisma.userProfile.update({
      where: { email: first.email },
      data: { houseId: house.id },
    });

    const res = await agent.get("/admin/api/users");

    expect(res.status).to.equal(200);
    expect(res.body).to.have.length(2);
    // Newest first: `second` was created after `first`.
    expect(res.body[0].email).to.equal(second.email);
    expect(res.body[1].email).to.equal(first.email);
    expect(res.body[1].householdName).to.equal("Le Foyer Test");
    expect(res.body[0].householdName).to.equal(null);
    for (const row of res.body) {
      expect(row).to.not.have.property("temporaryPassword");
      expect(row).to.not.have.property("passwordHash");
    }
  });
});