const ACTIVITY_STREAM_PREF_BRANCH = "browser.newtabpage.activity-stream.";
const {Prefs, DefaultPrefs} = require("lib/ActivityStreamPrefs.jsm");

const TEST_PREF_CONFIG = new Map([
  ["foo", {value: true}],
  ["bar", {value: "BAR"}],
  ["baz", {value: 1}],
  ["qux", {value: "foo", value_local_dev: "foofoo"}]
]);

describe("ActivityStreamPrefs", () => {
  describe("Prefs", () => {
    let p;
    beforeEach(() => {
      p = new Prefs();
    });
    it("should have get, set, and observe methods", () => {
      assert.property(p, "get");
      assert.property(p, "set");
      assert.property(p, "observe");
    });
    describe(".branchName", () => {
      it("should return the activity stream branch by default", () => {
        assert.equal(p.branchName, ACTIVITY_STREAM_PREF_BRANCH);
      });
      it("should return the custom branch name if it was passed to the constructor", () => {
        p = new Prefs("foo");
        assert.equal(p.branchName, "foo");
      });
    });
    describe("#observeBranch", () => {
      let listener;
      beforeEach(() => {
        p._prefBranch = {addObserver: sinon.stub()};
        listener = {onPrefChanged: sinon.stub()};
        p.observeBranch(listener);
      });
      it("should add an observer", () => {
        assert.calledOnce(p._prefBranch.addObserver);
        assert.calledWith(p._prefBranch.addObserver, "");
      });
      it("should store the listener", () => {
        assert.equal(p._branchObservers.size, 1);
        assert.ok(p._branchObservers.has(listener));
      });
      it("should call listener's onPrefChanged", () => {
        p._branchObservers.get(listener)();

        assert.calledOnce(listener.onPrefChanged);
      });
    });
    describe("#ignoreBranch", () => {
      let listener;
      beforeEach(() => {
        p._prefBranch = {
          addObserver: sinon.stub(),
          removeObserver: sinon.stub()
        };
        listener = {};
        p.observeBranch(listener);
      });
      it("should remove the observer", () => {
        p.ignoreBranch(listener);

        assert.calledOnce(p._prefBranch.removeObserver);
        assert.calledWith(p._prefBranch.removeObserver, p._prefBranch.addObserver.firstCall.args[0]);
      });
      it("should remove the listener", () => {
        assert.equal(p._branchObservers.size, 1);

        p.ignoreBranch(listener);

        assert.equal(p._branchObservers.size, 0);
      });
    });
  });

  describe("DefaultPrefs", () => {
    describe("#init", () => {
      let defaultPrefs;
      let sandbox;
      beforeEach(() => {
        sandbox = sinon.sandbox.create();
        defaultPrefs = new DefaultPrefs(TEST_PREF_CONFIG);
        sinon.spy(defaultPrefs.branch, "setBoolPref");
        sinon.spy(defaultPrefs.branch, "setStringPref");
        sinon.spy(defaultPrefs.branch, "setIntPref");
      });
      afterEach(() => {
        sandbox.restore();
      });
      it("should initialize a boolean pref", () => {
        defaultPrefs.init();
        assert.calledWith(defaultPrefs.branch.setBoolPref, "foo", true);
      });
      it("should initialize a string pref", () => {
        defaultPrefs.init();
        assert.calledWith(defaultPrefs.branch.setStringPref, "bar", "BAR");
      });
      it("should initialize a integer pref", () => {
        defaultPrefs.init();
        assert.calledWith(defaultPrefs.branch.setIntPref, "baz", 1);
      });
      it("should initialize a pref with value_local_dev if Firefox is a local build", () => {
        sandbox.stub(global.Services.prefs, "getStringPref").returns("default");
        defaultPrefs.init();
        assert.calledWith(defaultPrefs.branch.setStringPref, "qux", "foofoo");
      });
    });
    describe("#reset", () => {
      it("should clear user preferences for each pref in the config", () => {
        const defaultPrefs = new DefaultPrefs(TEST_PREF_CONFIG);
        sinon.spy(defaultPrefs.branch, "clearUserPref");
        defaultPrefs.reset();
        for (const name of TEST_PREF_CONFIG.keys()) {
          assert.calledWith(defaultPrefs.branch.clearUserPref, name);
        }
      });
    });
  });
});
