/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/. */

/*global loop, sinon, it, beforeEach, afterEach, describe */

var expect = chai.expect;

describe("loop.FeedbackAPIClient", function() {
  "use strict";

  var sandbox,
      fakeXHR,
      requests = [];

  beforeEach(function() {
    sandbox = sinon.sandbox.create();
    fakeXHR = sandbox.useFakeXMLHttpRequest();
    requests = [];
    // https://github.com/cjohansen/Sinon.JS/issues/393
    fakeXHR.xhr.onCreate = function (xhr) {
      requests.push(xhr);
    };
  });

  afterEach(function() {
    sandbox.restore();
  });

  describe("#constructor", function() {
    it("should require a baseUrl setting", function() {
      expect(function() {
        return new loop.FeedbackAPIClient();
      }).to.Throw(/required 'baseUrl'/);
    });

    it("should require a product setting", function() {
      expect(function() {
        return new loop.FeedbackAPIClient("http://fake", {});
      }).to.Throw(/required 'product'/);
    });
  });

  describe("constructed", function() {
    var client;

    beforeEach(function() {
      client = new loop.FeedbackAPIClient("http://fake/feedback", {
        product: "Hello",
        version: "42b1"
      });
    });

    describe("#send", function() {
      it("should send happy feedback data", function() {
        var feedbackData = {
          happy: true,
          description: "Happy User"
        };

        client.send(feedbackData, function(){});

        expect(requests).to.have.length.of(1);
        expect(requests[0].url).to.be.equal("http://fake/feedback");
        expect(requests[0].method).to.be.equal("POST");
        var parsed = JSON.parse(requests[0].requestBody);
        expect(parsed.happy).eql(true);
        expect(parsed.description).eql("Happy User");
      });

      it("should send sad feedback data", function() {
        var feedbackData = {
          happy: false,
          category: "confusing"
        };

        client.send(feedbackData, function(){});

        expect(requests).to.have.length.of(1);
        expect(requests[0].url).to.be.equal("http://fake/feedback");
        expect(requests[0].method).to.be.equal("POST");
        var parsed = JSON.parse(requests[0].requestBody);
        expect(parsed.happy).eql(false);
        expect(parsed.product).eql("Hello");
        expect(parsed.category).eql("confusing");
        expect(parsed.description).eql("Sad User");
      });

      it("should send formatted feedback data", function() {
        client.send({
          happy: false,
          category: "other",
          description: "it's far too awesome!"
        }, function(){});

        expect(requests).to.have.length.of(1);
        expect(requests[0].url).eql("http://fake/feedback");
        expect(requests[0].method).eql("POST");
        var parsed = JSON.parse(requests[0].requestBody);
        expect(parsed.happy).eql(false);
        expect(parsed.product).eql("Hello");
        expect(parsed.category).eql("other");
        expect(parsed.description).eql("it's far too awesome!");
      });

      it("should send product information", function() {
        client.send({product: "Hello"}, function(){});

        var parsed = JSON.parse(requests[0].requestBody);
        expect(parsed.product).eql("Hello");
      });

      it("should send platform information when provided", function() {
        client.send({platform: "Windows 8"}, function(){});

        var parsed = JSON.parse(requests[0].requestBody);
        expect(parsed.platform).eql("Windows 8");
      });

      it("should send channel information when provided", function() {
        client.send({channel: "beta"}, function(){});

        var parsed = JSON.parse(requests[0].requestBody);
        expect(parsed.channel).eql("beta");
      });

      it("should send version information when provided", function() {
        client.send({version: "42b1"}, function(){});

        var parsed = JSON.parse(requests[0].requestBody);
        expect(parsed.version).eql("42b1");
      });

      it("should send user_agent information when provided", function() {
        client.send({user_agent: "MOZAGENT"}, function(){});

        var parsed = JSON.parse(requests[0].requestBody);
        expect(parsed.user_agent).eql("MOZAGENT");
      });

      it("should send url information when provided", function() {
        client.send({url: "http://fake.invalid"}, function(){});

        var parsed = JSON.parse(requests[0].requestBody);
        expect(parsed.url).eql("http://fake.invalid");
      });

      it("should throw on invalid feedback data", function() {
        expect(function() {
          client.send("invalid data", function(){});
        }).to.Throw(/Invalid/);
      });

      it("should throw on unsupported field name", function() {
        expect(function() {
          client.send({bleh: "bah"}, function(){});
        }).to.Throw(/Unsupported/);
      });

      it("should call passed callback on success", function() {
        var cb = sandbox.spy();
        var fakeResponseData = {description: "confusing"};
        client.send({category: "confusing"}, cb);

        requests[0].respond(200, {"Content-Type": "application/json"},
                            JSON.stringify(fakeResponseData));

        sinon.assert.calledOnce(cb);
        sinon.assert.calledWithExactly(cb, null, fakeResponseData);
      });

      it("should call passed callback on error", function() {
        var cb = sandbox.spy();
        var fakeErrorData = {error: true};
        client.send({category: "confusing"}, cb);

        requests[0].respond(400, {"Content-Type": "application/json"},
                            JSON.stringify(fakeErrorData));

        sinon.assert.calledOnce(cb);
        sinon.assert.calledWithExactly(cb, sinon.match(function(err) {
          return /Bad Request/.test(err);
        }));
      });
    });
  });
});