import { describe, it, expect, beforeAll, afterAll } from "vitest";
import Fastify from "fastify";
import cookie from "@fastify/cookie";
import rateLimit from "@fastify/rate-limit";
import jwt from "jsonwebtoken";
import prisma from "../config/database";
import { config } from "../config/env";
import { securityHeaders } from "../middleware/security";
import projectsRoutes from "../routes/admin/projects";

// ---------------------------------------------------------------------------
// Project notes: author-only editing with a visible edited_at stamp, and
// admin-only deletion (a projects.edit holder may add + edit their own notes
// but never delete — user decision 2026-06-12).
// ---------------------------------------------------------------------------

const N = "projnotes_test_";

let app: Awaited<ReturnType<typeof buildApp>>;
let adminToken: string;
let userAId: number;
let userAToken: string;
let userBToken: string;
let roleId: number;
let projectId: number;
let noteId: number;

async function buildApp() {
  const a = Fastify({ logger: false });
  await a.register(cookie);
  await a.register(rateLimit, { max: 1000, timeWindow: "1 minute" });
  a.addHook("onRequest", securityHeaders);
  await a.register(projectsRoutes, { prefix: "/api/admin/projects" });
  return a;
}

function generateToken(user: {
  id: number;
  username: string;
  roleName: string | null;
}): string {
  return jwt.sign(
    { sub: user.id, username: user.username, role: user.roleName },
    config.jwt.secret,
    { expiresIn: "15m" },
  );
}

function inject(
  method: "POST" | "PUT" | "DELETE",
  path: string,
  token: string,
  body?: unknown,
) {
  return app.inject({
    method,
    url: path,
    headers: {
      Authorization: `Bearer ${token}`,
      // Content-Type only with a body — Fastify 400s an empty JSON body.
      ...(body !== undefined ? { "Content-Type": "application/json" } : {}),
    },
    ...(body !== undefined ? { payload: body as object } : {}),
  });
}

beforeAll(async () => {
  app = await buildApp();

  // Defensive pre-clean of a previously failed run.
  await prisma.project_notes.deleteMany({
    where: { content: { contains: N } },
  });
  await prisma.projects.deleteMany({ where: { name: { startsWith: N } } });
  await prisma.users.deleteMany({ where: { username: { startsWith: N } } });
  await prisma.roles.deleteMany({ where: { name: `${N}role` } });

  const admin = await prisma.users.findFirst({
    where: { roles: { name: "admin" } },
    include: { roles: true },
  });
  if (!admin) throw new Error("Test setup: admin user not found");
  adminToken = generateToken({
    id: admin.id,
    username: admin.username,
    roleName: admin.roles?.name ?? null,
  });

  // Non-admin role with projects.view + projects.edit.
  const role = await prisma.roles.create({
    data: { name: `${N}role`, display_name: "ProjNotes test role" },
  });
  roleId = role.id;
  const perms = await prisma.permissions.findMany({
    where: { name: { in: ["projects.view", "projects.edit"] } },
    select: { id: true },
  });
  if (perms.length !== 2) {
    throw new Error("Test setup: projects.view/projects.edit missing");
  }
  await prisma.role_permissions.createMany({
    data: perms.map((p) => ({ role_id: roleId, permission_id: p.id })),
  });

  const mkUser = async (suffix: string) =>
    prisma.users.create({
      data: {
        username: `${N}${suffix}`,
        email: `${N}${suffix}@test.local`,
        password_hash: "x",
        first_name: "Projnotes",
        last_name: suffix.toUpperCase(),
        is_active: true,
        role_id: roleId,
      },
    });
  const userA = await mkUser("a");
  const userB = await mkUser("b");
  userAId = userA.id;
  userAToken = generateToken({
    id: userA.id,
    username: userA.username,
    roleName: `${N}role`,
  });
  userBToken = generateToken({
    id: userB.id,
    username: userB.username,
    roleName: `${N}role`,
  });

  const project = await prisma.projects.create({
    data: { name: `${N}project`, status: "aktivni" },
  });
  projectId = project.id;

  // Note authored by user A (through the route, like the UI does).
  const res = await inject(
    "POST",
    `/api/admin/projects/${projectId}/notes`,
    userAToken,
    { content: `${N}original` },
  );
  expect(res.statusCode).toBe(201);
  noteId = res.json().data.note.id;
});

afterAll(async () => {
  await prisma.project_notes.deleteMany({ where: { project_id: projectId } });
  await prisma.projects.deleteMany({ where: { id: projectId } });
  await prisma.users.deleteMany({ where: { username: { startsWith: N } } });
  await prisma.roles.deleteMany({ where: { id: roleId } });
  await app.close();
});

describe("project notes — author-only edit with edited_at stamp", () => {
  it("the author edits their own note and the edit is stamped", async () => {
    const res = await inject(
      "PUT",
      `/api/admin/projects/${projectId}/notes/${noteId}`,
      userAToken,
      { content: `${N}edited` },
    );
    expect(res.statusCode).toBe(200);
    const row = await prisma.project_notes.findUnique({
      where: { id: noteId },
    });
    expect(row?.content).toBe(`${N}edited`);
    expect(row?.user_id).toBe(userAId);
    expect(row?.edited_at).not.toBeNull();
  });

  it("another user cannot edit someone else's note", async () => {
    const res = await inject(
      "PUT",
      `/api/admin/projects/${projectId}/notes/${noteId}`,
      userBToken,
      { content: `${N}hijack` },
    );
    expect(res.statusCode).toBe(403);
    const row = await prisma.project_notes.findUnique({
      where: { id: noteId },
    });
    expect(row?.content).toBe(`${N}edited`); // unchanged
  });

  it("rejects empty content and unknown note ids", async () => {
    const empty = await inject(
      "PUT",
      `/api/admin/projects/${projectId}/notes/${noteId}`,
      userAToken,
      { content: "   " },
    );
    expect(empty.statusCode).toBe(400);

    const missing = await inject(
      "PUT",
      `/api/admin/projects/${projectId}/notes/999999999`,
      userAToken,
      { content: "x" },
    );
    expect(missing.statusCode).toBe(404);
  });
});

describe("project notes — admin-only deletion", () => {
  it("a projects.edit holder cannot delete (even their own note)", async () => {
    const res = await inject(
      "DELETE",
      `/api/admin/projects/${projectId}/notes/${noteId}`,
      userAToken,
    );
    expect(res.statusCode).toBe(403);
  });

  it("an admin deletes anybody's note", async () => {
    const res = await inject(
      "DELETE",
      `/api/admin/projects/${projectId}/notes/${noteId}`,
      adminToken,
    );
    expect(res.statusCode).toBe(200);
    const row = await prisma.project_notes.findUnique({
      where: { id: noteId },
    });
    expect(row).toBeNull();
  });
});