"use strict";

var assert = require("node:assert");
var express = require("express");
var request = require("supertest");
var utils = require("./support/utils");

var shouldSkipQuery = require("./support/utils").shouldSkipQuery;
var methods = utils.methods;

describe("res", function () {
  describe(".send()", function () {
    it('should set body to ""', function (done) {
      var app = express();

      app.use(function (req, res) {
        res.send();
      });

      request(app).get("/").expect(200, "", done);
    });
  });

  describe(".send(null)", function () {
    it('should set body to ""', function (done) {
      var app = express();

      app.use(function (req, res) {
        res.send(null);
      });

      request(app).get("/").expect("Content-Length", "0").expect(200, "", done);
    });
  });

  describe(".send(undefined)", function () {
    it('should set body to ""', function (done) {
      var app = express();

      app.use(function (req, res) {
        res.send(undefined);
      });

      request(app).get("/").expect(200, "", done);
    });
  });

  describe(".send(Number)", function () {
    it.todo("should send as application/json", function (done) {
      var app = express();

      app.use(function (req, res) {
        res.send(1000);
      });

      request(app).get("/").expect("Content-Type", "application/json; charset=utf-8").expect(200, "1000", done);
    });
  });

  describe(".send(String)", function () {
    it("should send as html", function (done) {
      var app = express();

      app.use(function (req, res) {
        res.send("<p>hey</p>");
      });

      request(app).get("/").expect("Content-Type", "text/html; charset=utf-8").expect(200, "<p>hey</p>", done);
    });

    it("should set ETag", function (done) {
      var app = express();

      app.use(function (req, res) {
        var str = Array(1000).join("-");
        res.send(str);
      });

      request(app).get("/").expect("ETag", 'W/"3e7-qPnkJ3CVdVhFJQvUBfF10TmVA7g"').expect(200, done);
    });

    it("should not override Content-Type", function (done) {
      var app = express();

      app.use(function (req, res) {
        res.set("Content-Type", "text/plain").send("hey");
      });

      request(app).get("/").expect("Content-Type", "text/plain; charset=utf-8").expect(200, "hey", done);
    });

    it("should override charset in Content-Type", function (done) {
      var app = express();

      app.use(function (req, res) {
        res.set("Content-Type", "text/plain; charset=iso-8859-1").send("hey");
      });

      request(app).get("/").expect("Content-Type", "text/plain; charset=utf-8").expect(200, "hey", done);
    });

    it("should keep charset in Content-Type for Buffers", function (done) {
      var app = express();

      app.use(function (req, res) {
        res.set("Content-Type", "text/plain; charset=iso-8859-1").send(Buffer.from("hi"));
      });

      request(app).get("/").expect("Content-Type", "text/plain; charset=iso-8859-1").expect(200, "hi", done);
    });
  });

  describe(".send(Buffer)", function () {
    it("should send as octet-stream", function (done) {
      var app = express();

      app.use(function (req, res) {
        res.send(Buffer.from("hello"));
      });

      request(app)
        .get("/")
        .expect(200)
        .expect("Content-Type", "application/octet-stream")
        .expect(utils.shouldHaveBody(Buffer.from("hello")))
        .end(done);
    });

    it("should set ETag", function (done) {
      var app = express();

      app.use(function (req, res) {
        res.send(Buffer.alloc(999, "-"));
      });

      request(app).get("/").expect("ETag", 'W/"3e7-qPnkJ3CVdVhFJQvUBfF10TmVA7g"').expect(200, done);
    });

    it("should not override Content-Type", function (done) {
      var app = express();

      app.use(function (req, res) {
        res.set("Content-Type", "text/plain").send(Buffer.from("hey"));
      });

      request(app).get("/").expect("Content-Type", "text/plain; charset=utf-8").expect(200, "hey", done);
    });

    it.todo("should accept Uint8Array", function (done) {
      var app = express();
      app.use(function (req, res) {
        const encodedHey = new TextEncoder().encode("hey");
        res.set("Content-Type", "text/plain").send(encodedHey);
      });

      request(app).get("/").expect("Content-Type", "text/plain; charset=utf-8").expect(200, "hey", done);
    });

    it("should not override ETag", function (done) {
      var app = express();

      app.use(function (req, res) {
        res.type("text/plain").set("ETag", '"foo"').send(Buffer.from("hey"));
      });

      request(app).get("/").expect("ETag", '"foo"').expect(200, "hey", done);
    });
  });

  describe(".send(Object)", function () {
    it("should send as application/json", function (done) {
      var app = express();

      app.use(function (req, res) {
        res.send({ name: "tobi" });
      });

      request(app)
        .get("/")
        .expect("Content-Type", "application/json; charset=utf-8")
        .expect(200, '{"name":"tobi"}', done);
    });
  });

  describe("when the request method is HEAD", function () {
    it("should ignore the body", function (done) {
      var app = express();

      app.use(function (req, res) {
        res.send("yay");
      });

      request(app).head("/").expect(200).expect(utils.shouldNotHaveBody()).end(done);
    });
  });

  describe("when .statusCode is 204", function () {
    it.todo("should strip Content-* fields, Transfer-Encoding field, and body", function (done) {
      var app = express();

      app.use(function (req, res) {
        res.status(204).set("Transfer-Encoding", "chunked").send("foo");
      });

      request(app)
        .get("/")
        .expect(utils.shouldNotHaveHeader("Content-Type"))
        .expect(utils.shouldNotHaveHeader("Content-Length"))
        .expect(utils.shouldNotHaveHeader("Transfer-Encoding"))
        .expect(204, "", done);
    });
  });

  describe("when .statusCode is 205", function () {
    it("should strip Transfer-Encoding field and body, set Content-Length", function (done) {
      var app = express();

      app.use(function (req, res) {
        res.status(205).set("Transfer-Encoding", "chunked").send("foo");
      });

      request(app)
        .get("/")
        .expect(utils.shouldNotHaveHeader("Transfer-Encoding"))
        .expect("Content-Length", "0")
        .expect(205, "", done);
    });
  });

  describe("when .statusCode is 304", function () {
    it.todo("should strip Content-* fields, Transfer-Encoding field, and body", function (done) {
      var app = express();

      app.use(function (req, res) {
        res.status(304).set("Transfer-Encoding", "chunked").send("foo");
      });

      request(app)
        .get("/")
        .expect(utils.shouldNotHaveHeader("Content-Type"))
        .expect(utils.shouldNotHaveHeader("Content-Length"))
        .expect(utils.shouldNotHaveHeader("Transfer-Encoding"))
        .expect(304, "", done);
    });
  });

  it("should always check regardless of length", function (done) {
    var app = express();
    var etag = '"asdf"';

    app.use(function (req, res, next) {
      res.set("ETag", etag);
      res.send("hey");
    });

    request(app).get("/").set("If-None-Match", etag).expect(304, done);
  });

  it("should respond with 304 Not Modified when fresh", function (done) {
    var app = express();
    var etag = '"asdf"';

    app.use(function (req, res) {
      var str = Array(1000).join("-");
      res.set("ETag", etag);
      res.send(str);
    });

    request(app).get("/").set("If-None-Match", etag).expect(304, done);
  });

  it("should not perform freshness check unless 2xx or 304", function (done) {
    var app = express();
    var etag = '"asdf"';

    app.use(function (req, res, next) {
      res.status(500);
      res.set("ETag", etag);
      res.send("hey");
    });

    request(app).get("/").set("If-None-Match", etag).expect("hey").expect(500, done);
  });

  it("should not support jsonp callbacks", function (done) {
    var app = express();

    app.use(function (req, res) {
      res.send({ foo: "bar" });
    });

    request(app).get("/?callback=foo").expect('{"foo":"bar"}', done);
  });

  it("should be chainable", function (done) {
    var app = express();

    app.use(function (req, res) {
      assert.equal(res.send("hey"), res);
    });

    request(app).get("/").expect(200, "hey", done);
  });

  describe('"etag" setting', function () {
    describe("when enabled", function () {
      it("should send ETag", function (done) {
        var app = express();

        app.use(function (req, res) {
          res.send("kajdslfkasdf");
        });

        app.enable("etag");

        request(app).get("/").expect("ETag", 'W/"c-IgR/L5SF7CJQff4wxKGF/vfPuZ0"').expect(200, done);
      });

      methods.forEach(function (method) {
        if (method === "connect") return;

        it("should send ETag in response to " + method.toUpperCase() + " request", function (done) {
          if (method === "query" && shouldSkipQuery(process.versions.node)) {
            this.skip();
          }
          var app = express();

          app[method]("/", function (req, res) {
            res.send("kajdslfkasdf");
          });

          request(app)[method]("/").expect("ETag", 'W/"c-IgR/L5SF7CJQff4wxKGF/vfPuZ0"').expect(200, done);
        });
      });

      it("should send ETag for empty string response", function (done) {
        var app = express();

        app.use(function (req, res) {
          res.send("");
        });

        app.enable("etag");

        request(app).get("/").expect("ETag", 'W/"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk"').expect(200, done);
      });

      it("should send ETag for long response", function (done) {
        var app = express();

        app.use(function (req, res) {
          var str = Array(1000).join("-");
          res.send(str);
        });

        app.enable("etag");

        request(app).get("/").expect("ETag", 'W/"3e7-qPnkJ3CVdVhFJQvUBfF10TmVA7g"').expect(200, done);
      });

      it("should not override ETag when manually set", function (done) {
        var app = express();

        app.use(function (req, res) {
          res.set("etag", '"asdf"');
          res.send("hello!");
        });

        app.enable("etag");

        request(app).get("/").expect("ETag", '"asdf"').expect(200, done);
      });

      it("should not send ETag for res.send()", function (done) {
        var app = express();

        app.use(function (req, res) {
          res.send();
        });

        app.enable("etag");

        request(app).get("/").expect(utils.shouldNotHaveHeader("ETag")).expect(200, done);
      });
    });

    describe("when disabled", function () {
      it("should send no ETag", function (done) {
        var app = express();

        app.use(function (req, res) {
          var str = Array(1000).join("-");
          res.send(str);
        });

        app.disable("etag");

        request(app).get("/").expect(utils.shouldNotHaveHeader("ETag")).expect(200, done);
      });

      it("should send ETag when manually set", function (done) {
        var app = express();

        app.disable("etag");

        app.use(function (req, res) {
          res.set("etag", '"asdf"');
          res.send("hello!");
        });

        request(app).get("/").expect("ETag", '"asdf"').expect(200, done);
      });
    });

    describe('when "strong"', function () {
      it("should send strong ETag", function (done) {
        var app = express();

        app.set("etag", "strong");

        app.use(function (req, res) {
          res.send("hello, world!");
        });

        request(app).get("/").expect("ETag", '"d-HwnTDHB9U/PRbFMN1z1wps51lqk"').expect(200, done);
      });
    });

    describe('when "weak"', function () {
      it("should send weak ETag", function (done) {
        var app = express();

        app.set("etag", "weak");

        app.use(function (req, res) {
          res.send("hello, world!");
        });

        request(app).get("/").expect("ETag", 'W/"d-HwnTDHB9U/PRbFMN1z1wps51lqk"').expect(200, done);
      });
    });

    describe("when a function", function () {
      it("should send custom ETag", function (done) {
        var app = express();

        app.set("etag", function (body, encoding) {
          var chunk = !Buffer.isBuffer(body) ? Buffer.from(body, encoding) : body;
          assert.strictEqual(chunk.toString(), "hello, world!");
          return '"custom"';
        });

        app.use(function (req, res) {
          res.send("hello, world!");
        });

        request(app).get("/").expect("ETag", '"custom"').expect(200, done);
      });

      it("should not send falsy ETag", function (done) {
        var app = express();

        app.set("etag", function (body, encoding) {
          return undefined;
        });

        app.use(function (req, res) {
          res.send("hello, world!");
        });

        request(app).get("/").expect(utils.shouldNotHaveHeader("ETag")).expect(200, done);
      });
    });
  });
});