import { describe, it, expect } from 'vitest';
import type { Hono } from 'hono';
import { createApp } from '../src/app';
import { authToken, bearer } from './helpers';
import { db } from '../src/db/client';
import { user } from '../src/db/schema';
import { eq } from 'drizzle-orm';
import { activeAdminsExcluding } from '../src/routes/admin-users';

const PASSWORD = 'sterk-wachtwoord-123';

async function signInStatus(app: Hono, email: string, password: string): Promise<number> {
  const res = await app.request('/api/auth/sign-in/email', {
    method: 'POST',
    headers: { 'content-type': 'application/json' },
    body: JSON.stringify({ email, password }),
  });
  return res.status;
}

describe('GET /api/admin/users', () => {
  it('401s without a token, 403s for a worker', async () => {
    const app = createApp();
    expect((await app.request('/api/admin/users')).status).toBe(401);
    const workerTok = await authToken(app, 'users-list-worker@example.com');
    expect((await app.request('/api/admin/users', { headers: bearer(workerTok) })).status).toBe(
      403,
    );
  });

  it('returns each user with role and status', async () => {
    const app = createApp();
    const adminTok = await authToken(app, 'users-list-admin@example.com', 'admin');
    await authToken(app, 'users-list-w@example.com'); // a worker

    const res = await app.request('/api/admin/users', { headers: bearer(adminTok) });
    expect(res.status).toBe(200);
    const users = await res.json();
    const admin = users.find((u: { email: string }) => u.email === 'users-list-admin@example.com');
    const worker = users.find((u: { email: string }) => u.email === 'users-list-w@example.com');
    expect(admin.role).toBe('admin');
    expect(admin.status).toBe('active');
    expect(worker.role).toBe('worker');
    expect(worker.status).toBe('active');
  });
});

describe('POST /api/admin/users', () => {
  it('creates a user who can then sign in', async () => {
    const app = createApp();
    const adminTok = await authToken(app, 'users-create-admin@example.com', 'admin');
    const res = await app.request('/api/admin/users', {
      method: 'POST',
      headers: bearer(adminTok),
      body: JSON.stringify({
        email: 'created-worker@example.com',
        name: 'Nieuwe Werker',
        password: PASSWORD,
        role: 'worker',
      }),
    });
    expect(res.status).toBe(200);
    const created = await res.json();
    expect(created.email).toBe('created-worker@example.com');
    expect(created.role).toBe('worker');
    expect(created.status).toBe('active');
    expect(await signInStatus(app, 'created-worker@example.com', PASSWORD)).toBe(200);
  });

  it('rejects a duplicate email with 409', async () => {
    const app = createApp();
    const adminTok = await authToken(app, 'users-dup-admin@example.com', 'admin');
    const body = JSON.stringify({
      email: 'dup@example.com',
      name: 'Dup',
      password: PASSWORD,
      role: 'worker',
    });
    expect(
      (await app.request('/api/admin/users', { method: 'POST', headers: bearer(adminTok), body }))
        .status,
    ).toBe(200);
    expect(
      (await app.request('/api/admin/users', { method: 'POST', headers: bearer(adminTok), body }))
        .status,
    ).toBe(409);
  });

  it('rejects a too-short password with 400', async () => {
    const app = createApp();
    const adminTok = await authToken(app, 'users-shortpw-admin@example.com', 'admin');
    const res = await app.request('/api/admin/users', {
      method: 'POST',
      headers: bearer(adminTok),
      body: JSON.stringify({
        email: 'short@example.com',
        name: 'S',
        password: 'short',
        role: 'worker',
      }),
    });
    expect(res.status).toBe(400);
  });

  it('403s for a worker', async () => {
    const app = createApp();
    const workerTok = await authToken(app, 'users-create-worker@example.com');
    const res = await app.request('/api/admin/users', {
      method: 'POST',
      headers: bearer(workerTok),
      body: JSON.stringify({
        email: 'x@example.com',
        name: 'X',
        password: PASSWORD,
        role: 'worker',
      }),
    });
    expect(res.status).toBe(403);
  });

  it('stores a mixed-case email lowercased and returns the row (no 500)', async () => {
    const app = createApp();
    const adminTok = await authToken(app, 'mixed-admin@example.com', 'admin');
    const res = await app.request('/api/admin/users', {
      method: 'POST',
      headers: bearer(adminTok),
      body: JSON.stringify({
        email: 'Mixed.Case@Example.com',
        name: 'Mixed',
        password: PASSWORD,
        role: 'worker',
      }),
    });
    expect(res.status).toBe(200);
    expect((await res.json()).email).toBe('mixed.case@example.com');
  });
});

async function userIdByEmail(email: string): Promise<string> {
  const [row] = await db.select().from(user).where(eq(user.email, email));
  return row.id;
}

describe('POST /api/admin/users/:id/role', () => {
  it('promotes a worker to admin and back', async () => {
    const app = createApp();
    const adminTok = await authToken(app, 'role-admin@example.com', 'admin');
    await authToken(app, 'role-target@example.com'); // worker
    const id = await userIdByEmail('role-target@example.com');

    const up = await app.request(`/api/admin/users/${id}/role`, {
      method: 'POST',
      headers: bearer(adminTok),
      body: JSON.stringify({ role: 'admin' }),
    });
    expect(up.status).toBe(200);
    expect((await up.json()).role).toBe('admin');

    const down = await app.request(`/api/admin/users/${id}/role`, {
      method: 'POST',
      headers: bearer(adminTok),
      body: JSON.stringify({ role: 'worker' }),
    });
    expect((await down.json()).role).toBe('worker');
  });

  it('refuses self-demotion', async () => {
    const app = createApp();
    const adminTok = await authToken(app, 'role-self@example.com', 'admin');
    // a second admin so the last-admin guard is not what trips first
    await authToken(app, 'role-self-other-admin@example.com', 'admin');
    const id = await userIdByEmail('role-self@example.com');
    const res = await app.request(`/api/admin/users/${id}/role`, {
      method: 'POST',
      headers: bearer(adminTok),
      body: JSON.stringify({ role: 'worker' }),
    });
    expect(res.status).toBe(400);
    expect((await res.json()).error).toContain('degraderen');
  });

  // Demoting *another* admin is allowed while the acting admin remains active — this is the
  // expected 200 path. The genuine last-admin guard logic is covered as a unit test of
  // activeAdminsExcluding below (the route branch is unreachable over HTTP because the caller
  // is always an active admin and never the target).
  it('allows demoting another admin while the caller stays admin', async () => {
    const app = createApp();
    const adminTok = await authToken(app, 'role-peer-admin@example.com', 'admin');
    await authToken(app, 'role-peer@example.com', 'admin');
    const peerId = await userIdByEmail('role-peer@example.com');
    const res = await app.request(`/api/admin/users/${peerId}/role`, {
      method: 'POST',
      headers: bearer(adminTok),
      body: JSON.stringify({ role: 'worker' }),
    });
    expect(res.status).toBe(200);
    expect((await res.json()).role).toBe('worker');
  });
});

// Direct unit coverage of the last-admin invariant helper (the route branch that uses it is
// unreachable over HTTP, so this is where its !banned filter + exclusion logic is actually tested).
describe('activeAdminsExcluding', () => {
  it('counts only active (non-banned) admins and honours the exclusion', async () => {
    const app = createApp();
    const before = await activeAdminsExcluding('___none___');

    await authToken(app, 'aae-fresh-admin@example.com', 'admin');
    expect(await activeAdminsExcluding('___none___')).toBe(before + 1); // a new active admin counts

    const freshId = await userIdByEmail('aae-fresh-admin@example.com');
    expect(await activeAdminsExcluding(freshId)).toBe(before); // excluding it drops the count back

    await db.update(user).set({ banned: true }).where(eq(user.id, freshId));
    expect(await activeAdminsExcluding('___none___')).toBe(before); // a banned admin is not counted
  });
});

describe('adminGuard rejects banned admins', () => {
  it('403s a banned admin that still holds a valid token', async () => {
    const app = createApp();
    const adminTok = await authToken(app, 'banned-admin@example.com', 'admin');
    expect((await app.request('/api/admin/users', { headers: bearer(adminTok) })).status).toBe(200);

    // Ban directly (not via /deactivate, which would also delete the session) so the token stays valid.
    const id = await userIdByEmail('banned-admin@example.com');
    await db.update(user).set({ banned: true }).where(eq(user.id, id));
    expect((await app.request('/api/admin/users', { headers: bearer(adminTok) })).status).toBe(403);
  });
});

describe('deactivate / reactivate', () => {
  async function signIn(app: Hono, email: string, password: string): Promise<number> {
    const res = await app.request('/api/auth/sign-in/email', {
      method: 'POST',
      headers: { 'content-type': 'application/json' },
      body: JSON.stringify({ email, password }),
    });
    return res.status;
  }

  it('blocks sign-in after deactivate and restores it after reactivate', async () => {
    const app = createApp();
    const adminTok = await authToken(app, 'deact-admin@example.com', 'admin');
    // create a worker we control the password of
    await app.request('/api/admin/users', {
      method: 'POST',
      headers: bearer(adminTok),
      body: JSON.stringify({
        email: 'deact-target@example.com',
        name: 'Deact',
        password: 'sterk-wachtwoord-123',
        role: 'worker',
      }),
    });
    const id = await userIdByEmail('deact-target@example.com');
    expect(await signIn(app, 'deact-target@example.com', 'sterk-wachtwoord-123')).toBe(200);

    const off = await app.request(`/api/admin/users/${id}/deactivate`, {
      method: 'POST',
      headers: bearer(adminTok),
    });
    expect(off.status).toBe(200);
    expect((await off.json()).status).toBe('inactive');
    expect(await signIn(app, 'deact-target@example.com', 'sterk-wachtwoord-123')).not.toBe(200);

    const on = await app.request(`/api/admin/users/${id}/reactivate`, {
      method: 'POST',
      headers: bearer(adminTok),
    });
    expect((await on.json()).status).toBe('active');
    expect(await signIn(app, 'deact-target@example.com', 'sterk-wachtwoord-123')).toBe(200);
  });

  it('refuses self-deactivation', async () => {
    const app = createApp();
    const adminTok = await authToken(app, 'deact-self@example.com', 'admin');
    await authToken(app, 'deact-self-other@example.com', 'admin'); // a second admin
    const id = await userIdByEmail('deact-self@example.com');
    const res = await app.request(`/api/admin/users/${id}/deactivate`, {
      method: 'POST',
      headers: bearer(adminTok),
    });
    expect(res.status).toBe(400);
    expect((await res.json()).error).toContain('deactiveren');
  });

  // Deactivating another admin is allowed (the caller remains); the caller can never deactivate
  // themselves even as the sole remaining active admin — together these preserve the invariant.
  it('allows deactivating another admin but always blocks self-deactivate', async () => {
    const app = createApp();
    const adminTok = await authToken(app, 'deact-last-admin@example.com', 'admin');
    await authToken(app, 'deact-peer@example.com', 'admin');
    const peerId = await userIdByEmail('deact-peer@example.com');
    const res = await app.request(`/api/admin/users/${peerId}/deactivate`, {
      method: 'POST',
      headers: bearer(adminTok),
    });
    expect(res.status).toBe(200); // caller still admin → allowed

    // The caller is now the only active admin; deactivating self is refused.
    const callerId = await userIdByEmail('deact-last-admin@example.com');
    const selfRes = await app.request(`/api/admin/users/${callerId}/deactivate`, {
      method: 'POST',
      headers: bearer(adminTok),
    });
    expect(selfRes.status).toBe(400);
  });

  it('404s on an unknown id and 403s for a worker', async () => {
    const app = createApp();
    const adminTok = await authToken(app, 'deact-404-admin@example.com', 'admin');
    expect(
      (
        await app.request('/api/admin/users/nope/deactivate', {
          method: 'POST',
          headers: bearer(adminTok),
        })
      ).status,
    ).toBe(404);
    const workerTok = await authToken(app, 'deact-worker@example.com');
    const id = await userIdByEmail('deact-worker@example.com');
    expect(
      (
        await app.request(`/api/admin/users/${id}/deactivate`, {
          method: 'POST',
          headers: bearer(workerTok),
        })
      ).status,
    ).toBe(403);
  });
});

describe('POST /api/admin/users/:id/password', () => {
  async function signIn(app: Hono, email: string, password: string): Promise<number> {
    const res = await app.request('/api/auth/sign-in/email', {
      method: 'POST',
      headers: { 'content-type': 'application/json' },
      body: JSON.stringify({ email, password }),
    });
    return res.status;
  }

  it('sets a new password: new works, old fails', async () => {
    const app = createApp();
    const adminTok = await authToken(app, 'pw-admin@example.com', 'admin');
    await app.request('/api/admin/users', {
      method: 'POST',
      headers: bearer(adminTok),
      body: JSON.stringify({
        email: 'pw-target@example.com',
        name: 'Pw',
        password: 'old-wachtwoord-123',
        role: 'worker',
      }),
    });
    const id = await userIdByEmail('pw-target@example.com');

    const res = await app.request(`/api/admin/users/${id}/password`, {
      method: 'POST',
      headers: bearer(adminTok),
      body: JSON.stringify({ password: 'new-wachtwoord-456' }),
    });
    expect(res.status).toBe(200);
    expect(await signIn(app, 'pw-target@example.com', 'new-wachtwoord-456')).toBe(200);
    expect(await signIn(app, 'pw-target@example.com', 'old-wachtwoord-123')).not.toBe(200);
  });

  it('rejects a too-short password with 400 and 403s for a worker', async () => {
    const app = createApp();
    const adminTok = await authToken(app, 'pw-short-admin@example.com', 'admin');
    await authToken(app, 'pw-worker@example.com');
    const id = await userIdByEmail('pw-worker@example.com');
    expect(
      (
        await app.request(`/api/admin/users/${id}/password`, {
          method: 'POST',
          headers: bearer(adminTok),
          body: JSON.stringify({ password: 'short' }),
        })
      ).status,
    ).toBe(400);
    const workerTok = await authToken(app, 'pw-worker2@example.com');
    expect(
      (
        await app.request(`/api/admin/users/${id}/password`, {
          method: 'POST',
          headers: bearer(workerTok),
          body: JSON.stringify({ password: 'long-enough-123' }),
        })
      ).status,
    ).toBe(403);
  });
});