'use strict';

const fs = require('fs');
const path = require('path');
const http = require('http');

const methods = require('methods');
const request = require('supertest');
const should = require('should');
const expect = require('expect.js');

const strapi = require('../../..');

describe('router', function () {
  it('exposes middleware factory', function (done) {
    const app = strapi.server();
    const router = strapi.middlewares.router();

    router.should.have.property('routes');
    router.routes.should.be.type('function');

    const middleware = router.routes();

    should.exist(middleware);
    middleware.should.be.type('function');
    done();
  });

  it('matches first to last', function (done) {
    const app = strapi.server();
    const router = strapi.middlewares.router();

    router
      .get('user_page', '/user/(.*).jsx', function * (next) {
        this.body = {
          order: 1
        };
      })
      .all('app', '/app/(.*).jsx', function * (next) {
        this.body = {
          order: 2
        };
      })
      .all('view', '(.*).jsx', function * (next) {
        this.body = {
          order: 3
        };
      });

    request(http.createServer(app.use(router.routes()).callback()))
      .get('/user/account.jsx')
      .expect(200)
      .end(function (err, res) {
        if (err) {
          return done(err);
        }
        expect(res.body).to.have.property('order', 1);
        done();
      })
  });

  it('nests routers', function (done) {
    const app = strapi.server();
    const router = strapi.middlewares.router;

    const forums = router({
      prefix: '/api'
    });

    const posts = router({
      prefix: '/posts'
    });

    let server;

    posts
      .get('/', function * (next) {
        this.status = 204;
        yield next;
      })
      .get('/:pid', function * (next) {
        this.body = this.params;
        yield next;
      });

    forums.use('/forums/:fid', posts.routes());

    server = http.createServer(app.use(forums.routes()).callback());

    request(server)
      .get('/api/forums/1/posts')
      .expect(204)
      .end(function (err) {
        if (err) {
          return done(err);
        }

        request(server)
          .get('/api/forums/1')
          .expect(404)
          .end(function (err) {
            if (err) {
              return done(err);
            }

            request(server)
              .get('/api/forums/1/posts/2')
              .expect(200)
              .end(function (err, res) {
                if (err) {
                  return done(err);
                }

                expect(res.body).to.have.property('fid', '1');
                expect(res.body).to.have.property('pid', '2');
                done();
              });
          });
      });
  });

  it('matches corresponding requests', function (done) {
    const app = strapi.server();
    const router = strapi.middlewares.router();

    app.use(router.routes());

    router.get('/:category/:title', function * (next) {
      this.should.have.property('params');
      this.params.should.have.property('category', 'programming');
      this.params.should.have.property('title', 'how-to-node');
      this.status = 204;
    });

    router.post('/:category', function * (next) {
      this.should.have.property('params');
      this.params.should.have.property('category', 'programming');
      this.status = 204;
    });

    router.put('/:category/not-a-title', function * (next) {
      this.should.have.property('params');
      this.params.should.have.property('category', 'programming');
      this.params.should.not.have.property('title');
      this.status = 204;
    });

    const server = http.createServer(app.callback());

    request(server)
      .get('/programming/how-to-node')
      .expect(204)
      .end(function (err, res) {
        if (err) {
          return done(err);
        }

        request(server)
          .post('/programming')
          .expect(204)
          .end(function (err, res) {
            if (err) {
              return done(err);
            }

            request(server)
              .put('/programming/not-a-title')
              .expect(204)
              .end(function (err, res) {
                done(err);
              });
          });
      });
  });

  it('executes route middleware using `app.context`', function (done) {
    const app = strapi.server();
    const router = strapi.middlewares.router();

    app.use(router.routes());

    router.get('/:category/:title', function * (next) {
      this.should.have.property('app');
      this.should.have.property('req');
      this.should.have.property('res');
      this.status = 204;
      done();
    });

    request(http.createServer(app.callback()))
      .get('/match/this')
      .expect(204)
      .end(function (err) {
        if (err) {
          return done(err);
        }
      });
  });

  it('does not match after ctx.throw()', function (done) {
    const app = strapi.server();
    const router = strapi.middlewares.router();

    let counter = 0;

    app.use(router.routes());

    router.get('/', function * (next) {
      counter++;
      this.throw(403);
    });

    router.get('/', function * (next) {
      counter++;
    });

    const server = http.createServer(app.callback());

    request(server)
      .get('/')
      .expect(403)
      .end(function (err, res) {
        if (err) {
          return done(err);
        }
        counter.should.equal(1);
        done();
      });
  });

  it('supports generators for route middleware', function (done) {
    const app = strapi.server();
    const router = strapi.middlewares.router();

    app.use(router.routes());

    const readVersion = function () {
      return function (fn) {
        const packagePath = path.join(__dirname, '..', '..', '..', 'package.json');
        fs.readFile(packagePath, 'utf8', function (err, data) {
          if (err) {
            return fn(err);
          }
          fn(null, JSON.parse(data).version);
        });
      };
    };

    router
      .get('/', function * (next) {
        yield next;
      }, function * (next) {
        const version = yield readVersion();
        this.status = 204;
        return yield next;
      });

    request(http.createServer(app.callback()))
      .get('/')
      .expect(204)
      .end(done);
  });

  it('responds to OPTIONS requests', function (done) {
    const app = strapi.server();
    const router = strapi.middlewares.router();

    app.use(router.routes());
    app.use(router.allowedMethods());

    router.get('/users', function * () {});
    router.put('/users', function * () {});
    request(http.createServer(app.callback()))
      .options('/users')
      .expect(204)
      .end(function (err, res) {
        if (err) {
          return done(err);
        }
        res.header.should.have.property('allow', 'PUT, HEAD, GET');
        done();
      });
  });

  it('responds with 405 Method Not Allowed', function (done) {
    const app = strapi.server();
    const router = strapi.middlewares.router();

    app.use(router.routes());
    app.use(router.allowedMethods());

    router.get('/users', function * () {});
    router.put('/users', function * () {});
    router.post('/events', function * () {});

    request(http.createServer(app.callback()))
      .post('/users')
      .expect(405)
      .end(function (err, res) {
        if (err) {
          return done(err);
        }
        res.header.should.have.property('allow', 'PUT, HEAD, GET');
        done();
      });
  });

  it('responds with 501 Not Implemented', function (done) {
    const app = strapi.server();
    const router = strapi.middlewares.router();

    app.use(router.routes());
    app.use(router.allowedMethods());

    router.get('/users', function * () {});
    router.put('/users', function * () {});

    request(http.createServer(app.callback()))
      .search('/users')
      .expect(501)
      .end(function (err, res) {
        if (err) {
          return done(err);
        }
        done();
      });
  });

  it('does not send 405 if route matched but status is 404', function (done) {
    const app = strapi.server();
    const router = strapi.middlewares.router();

    app.use(router.routes());
    app.use(router.allowedMethods());

    router.get('/users', function * () {
      this.status = 404;
    });

    request(http.createServer(app.callback()))
      .get('/users')
      .expect(404)
      .end(function (err, res) {
        if (err) {
          return done(err);
        }
        done();
      });
  });

  it('supports custom routing detect path: ctx.routerPath', function (done) {
    const app = strapi.server();
    const router = strapi.middlewares.router();

    app.use(function * (next) {
      const appname = this.request.hostname.split('.', 1)[0];
      this.routerPath = '/' + appname + this.path;
      yield * next;
    });

    app.use(router.routes());

    router.get('/helloworld/users', function * () {
      this.body = this.method + ' ' + this.url;
    });

    request(http.createServer(app.callback()))
      .get('/users')
      .set('Host', 'helloworld.example.com')
      .expect(200)
      .expect('GET /users', done);
  });

  describe('router#[verb]()', function () {
    it('registers route specific to HTTP verb', function () {
      const app = strapi.server();
      const router = strapi.middlewares.router();

      app.use(router.routes());

      methods.forEach(function (method) {
        router.should.have.property(method);
        router[method].should.be.type('function');
        router[method]('/', function * () {});
      });

      router.stack.should.have.length(methods.length);
    });

    it('enables route chaining', function () {
      const router = strapi.middlewares.router();

      methods.forEach(function (method) {
        router[method]('/', function * () {}).should.equal(router);
      });
    });
  });

  describe('router#use()', function (done) {
    it('uses router middleware without path', function (done) {
      const app = strapi.server();
      const router = strapi.middlewares.router();

      router.get('/foo/bar', function * (next) {
        this.body = {
          foobar: this.foo + 'bar'
        };
      });

      router.use(function * (next) {
        this.foo = 'baz';
        yield next;
      });

      router.use(function * (next) {
        this.foo = 'foo';
        yield next;
      });

      app.use(router.routes());

      request(http.createServer(app.callback()))
        .get('/foo/bar')
        .expect(200)
        .end(function (err, res) {
          if (err) {
            return done(err);
          }

          expect(res.body).to.have.property('foobar', 'foobar');
          done();
        });
    });

    it('uses router middleware at given path', function (done) {
      const app = strapi.server();
      const router = strapi.middlewares.router();

      router.get('/foo/bar', function * (next) {
        this.body = {
          foobar: this.foo + 'bar'
        };
      });

      router.use('/foo', function * (next) {
        this.foo = 'foo';
        yield next;
      });

      app.use(router.routes());

      request(http.createServer(app.callback()))
        .get('/foo/bar')
        .expect(200)
        .end(function (err, res) {
          if (err) {
            return done(err);
          }

          expect(res.body).to.have.property('foobar', 'foobar');
          done();
        });
    });
  });

  describe('router#register()', function () {
    it('registers new routes', function (done) {
      const app = strapi.server();
      const router = strapi.middlewares.router();

      router.should.have.property('register');
      router.register.should.be.type('function');

      const route = router.register('/', ['GET', 'POST'], function * () {});

      app.use(router.routes());

      router.stack.should.be.an.instanceOf(Array);
      router.stack.should.have.property('length', 1);
      router.stack[0].should.have.property('path', '/');
      done();
    });
  });

  describe('router#redirect()', function () {
    it('redirects using route names', function (done) {
      const app = strapi.server();
      const router = strapi.middlewares.router();
      app.use(router.routes());
      router.get('home', '/', function * () {});
      router.get('sign-up-form', '/sign-up-form', function * () {});
      router.redirect('home', 'sign-up-form');
      request(http.createServer(app.callback()))
        .post('/')
        .expect(301)
        .end(function (err, res) {
          if (err) {
            return done(err);
          }
          res.header.should.have.property('location', '/sign-up-form');
          done();
        });
    });
  });

  describe('router#url()', function () {
    it('generates URL for given route', function (done) {
      const app = strapi.server();
      const router = strapi.middlewares.router();

      app.use(router.routes());

      router.get('books', '/:category/:title', function * (next) {
        this.status = 204;
      });

      let url = router.url('books', {
        category: 'programming',
        title: 'how to node'
      });

      url.should.equal('/programming/how%20to%20node');
      url = router.url('books', 'programming', 'how to node');
      url.should.equal('/programming/how%20to%20node');
      done();
    });
  });

  describe('router#param()', function () {
    it('runs parameter middleware', function (done) {
      const app = strapi.server();
      const router = strapi.middlewares.router();

      app.use(router.routes());
      router
        .param('user', function * (id, next) {
          this.user = {
            name: 'alex'
          };
          if (!id) return this.status = 404;
          yield next;
        })
        .get('/users/:user', function * (next) {
          this.body = this.user;
        });

      request(http.createServer(app.callback()))
        .get('/users/3')
        .expect(200)
        .end(function (err, res) {
          if (err) {
            return done(err);
          }
          res.should.have.property('body');
          res.body.should.have.property('name', 'alex');
          done();
        });
    });

    it('runs parameter middleware in order of URL appearance', function (done) {
      const app = strapi.server();
      const router = strapi.middlewares.router();

      router
        .param('user', function * (id, next) {
          this.user = {
            name: 'alex'
          };
          if (this.ranFirst) {
            this.user.ordered = 'parameters';
          }
          if (!id) return this.status = 404;
          yield next;
        })
        .param('first', function * (id, next) {
          this.ranFirst = true;
          if (this.user) {
            this.ranFirst = false;
          }
          if (!id) return this.status = 404;
          yield next;
        })
        .get('/:first/users/:user', function * (next) {
          this.body = this.user;
        });

      request(http.createServer(
        app
          .use(router.routes())
          .callback()))
        .get('/first/users/3')
        .expect(200)
        .end(function (err, res) {
          if (err) {
            return done(err);
          }

          res.should.have.property('body');
          res.body.should.have.property('name', 'alex');
          res.body.should.have.property('ordered', 'parameters');
          done();
        });
    });
  });

  describe('router#opts', function () {
    it('responds with 200', function (done) {
      const app = strapi.server();
      const router = strapi.middlewares.router({
        strict: true
      });

      router.get('/info', function * () {
        this.body = 'hello';
      });

      request(http.createServer(
        app
          .use(router.routes())
          .callback()))
        .get('/info')
        .expect(200)
        .end(function (err, res) {
          if (err) {
            return done(err);
          }
          res.text.should.equal('hello');
          done();
        });
    });

    it('should allow setting a prefix', function (done) {
      const app = strapi.server();
      const routes = strapi.middlewares.router({
        prefix: '/things/:thing_id'
      });

      routes.get('/list', function * (next) {
        this.body = this.params;
      });

      app.use(routes.routes());

      request(http.createServer(app.callback()))
        .get('/things/1/list')
        .expect(200)
        .end(function (err, res) {
          if (err) {
            return done(err);
          }
          res.body.thing_id.should.equal('1');
          done();
        });
    });

    it('responds with 404 when has a trailing slash', function (done) {
      const app = strapi.server();
      const router = strapi.middlewares.router({
        strict: true
      });

      router.get('/info', function * () {
        this.body = 'hello';
      });

      request(http.createServer(
        app
          .use(router.routes())
          .callback()))
        .get('/info/')
        .expect(404)
        .end(function (err, res) {
          if (err) {
            return done(err);
          }
          done();
        });
    });
  });

  describe('use middleware with opts', function () {
    it('responds with 200', function (done) {
      const app = strapi.server();
      const router = strapi.middlewares.router({
        strict: true
      });

      router.get('/info', function * () {
        this.body = 'hello';
      })

      request(http.createServer(
        app
          .use(router.routes())
          .callback()))
        .get('/info')
        .expect(200)
        .end(function (err, res) {
          if (err) {
            return done(err);
          }
          res.text.should.equal('hello');
          done();
        });
    });

    it('responds with 404 when has a trailing slash', function (done) {
      const app = strapi.server();
      const router = strapi.middlewares.router({
        strict: true
      });

      router.get('/info', function * () {
        this.body = 'hello';
      })

      request(http.createServer(
        app
          .use(router.routes())
          .callback()))
        .get('/info/')
        .expect(404)
        .end(function (err, res) {
          if (err) {
            return done(err);
          }
          done();
        });
    });
  });

  describe('router.routes()', function () {
    it('should return composed middleware', function (done) {
      const app = strapi.server();
      const router = strapi.middlewares.router();

      let middlewareCount = 0;

      const middlewareA = function * (next) {
        middlewareCount++;
        yield next;
      };

      const middlewareB = function * (next) {
        middlewareCount++;
        yield next;
      };

      router.use(middlewareA, middlewareB);
      router.get('/users/:id', function * () {
        should.exist(this.params.id);
        this.body = {
          hello: 'world'
        };
      });

      const routerMiddleware = router.routes();

      expect(routerMiddleware).to.be.a('function');

      request(http.createServer(
        app
          .use(routerMiddleware)
          .callback()))
        .get('/users/1')
        .expect(200)
        .end(function (err, res) {
          if (err) {
            return done(err);
          }
          expect(res.body).to.be.an('object');
          expect(res.body).to.have.property('hello', 'world');
          expect(middlewareCount).to.equal(2);
          done();
        });
    });
  });

  describe('If no HEAD method, default to GET', function () {
    it('should default to GET', function (done) {
      const app = strapi.server();
      const router = strapi.middlewares.router();

      router.get('/users/:id', function * () {
        should.exist(this.params.id);
        this.body = 'hello';
      });

      request(http.createServer(
        app
          .use(router.routes())
          .callback()))
        .head('/users/1')
        .expect(200)
        .end(function (err, res) {
          if (err) {
            return done(err);
          }
          expect(res.body).to.be.empty();
          done();
        });
    });

    it('should work with middleware', function (done) {
      const app = strapi.server();
      const router = strapi.middlewares.router();

      router.get('/users/:id', function * () {
        should.exist(this.params.id);
        this.body = 'hello';
      });

      request(http.createServer(
          app
          .use(router.routes())
          .callback()))
        .head('/users/1')
        .expect(200)
        .end(function (err, res) {
          if (err) {
            return done(err);
          }
          expect(res.body).to.be.empty();
          done();
        });
    });
  });

  describe('router#prefix', function () {
    it('should set opts.prefix', function () {
      const router = strapi.middlewares.router();

      expect(router.opts).to.not.have.key('prefix');
      router.prefix('/things/:thing_id');
      expect(router.opts.prefix).to.equal('/things/:thing_id');
    });

    it('should prefix existing routes', function () {
      const router = strapi.middlewares.router();

      router.get('/users/:id', function * () {
        this.body = 'test';
      })

      router.prefix('/things/:thing_id');

      const route = router.stack[0];

      expect(route.path).to.equal('/things/:thing_id/users/:id');
      expect(route.paramNames).to.have.length(2);
      expect(route.paramNames[0]).to.have.property('name', 'thing_id');
      expect(route.paramNames[1]).to.have.property('name', 'id');
    });
  })

  describe('static router#url()', function () {
    it('generates route URL', function () {
      const router = strapi.middlewares.router;

      const url = router.url('/:category/:title', {
        category: 'programming',
        title: 'how-to-node'
      });

      url.should.equal('/programming/how-to-node');
    });

    it('escapes using encodeURIComponent()', function () {
      const router = strapi.middlewares.router;

      const url = router.url('/:category/:title', {
        category: 'programming',
        title: 'how to node'
      });

      url.should.equal('/programming/how%20to%20node');
    });
  });
});