const { describe, it, beforeEach, afterEach } = require('node:test');
const assert = require('assert');
const { requireRole } = require('../backend/middleware/role.middleware');

describe('requireRole middleware', () => {
  let req, res, next;

  beforeEach(() => {
    req = {
      user: {}
    };
    res = {
      status: (code) => {
        res.statusCode = code;
        return res;
      },
      json: (body) => {
        res.body = body;
        return res;
      }
    };
    next = () => {};
  });

  it('should allow access when user has required role', () => {
    req.user.role = 'admin';
    const middleware = requireRole(['admin']);
    
    let calledNext = false;
    next = () => {
      calledNext = true;
    };

    middleware(req, res, next);
    assert.strictEqual(calledNext, true);
  });

  it('should deny access when user does not have required role', () => {
    req.user.role = 'user';
    const middleware = requireRole(['admin']);
    
    let statusCode = null;
    let body = null;
    
    res.status = (code) => {
      statusCode = code;
      return res;
    };
    
    res.json = (data) => {
      body = data;
      return res;
    };

    middleware(req, res, next);
    assert.strictEqual(statusCode, 403);
    assert.deepStrictEqual(body, { error: 'Forbidden' });
  });

  it('should deny access when no user role is present', () => {
    req.user.role = undefined;
    const middleware = requireRole(['admin']);
    
    let statusCode = null;
    let body = null;
    
    res.status = (code) => {
      statusCode = code;
      return res;
    };
    
    res.json = (data) => {
      body = data;
      return res;
    };

    middleware(req, res, next);
    assert.strictEqual(statusCode, 401);
    assert.deepStrictEqual(body, { error: 'Unauthorized' });
  });

  it('should allow access when user has one of multiple required roles', () => {
    req.user.role = 'moderator';
    const middleware = requireRole(['admin', 'moderator']);
    
    let calledNext = false;
    next = () => {
      calledNext = true;
    };

    middleware(req, res, next);
    assert.strictEqual(calledNext, true);
  });
});