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define([
    "cldr",
    "../util",
    "json!cldr-data/supplemental/likelySubtags.json",
    "cldr/event"
], function (Cldr, util, likelySubtagsJson) {

    Cldr.load(likelySubtagsJson);

    ["off", "on", "once"].forEach(function (method) {
        describe("Cldr." + method + "( event, listener )", function () {

            it("should throw error on missing event parameter", function () {
                expect(function () {
                    Cldr[method]();
                }).to.throw(Error, /E_MISSING_PARAMETER/);
            });

            it("should throw error on missing listener parameter", function () {
                expect(function () {
                    Cldr[method]("get");
                }).to.throw(Error, /E_MISSING_PARAMETER/);
            });

            it("should throw error on invalid event parameter type", function () {
                util.assertEventParameter(expect, function (invalidValue) {
                    return function () {
                        Cldr[method](invalidValue, function () {
                        });
                    };
                });
            });

            it("should throw error on invalid listener parameter type", function () {
                util.assertFunctionParameter(expect, function (invalidValue) {
                    return function () {
                        Cldr[method]("get", invalidValue);
                    };
                });
            });

        });

    });

    describe("Cldr.on( \"get\", listener )", function () {

        it("should add the listener to the global `get` event", function (done) {
            function listener() {
                done();
            }

            var cldr = new Cldr("root");
            Cldr.on("get", listener);
            cldr.get("something");
            Cldr.off("get", listener);
        });

        it("should pass path and value to the listener", function (done) {
            function listener(path, value) {
                if (path === "supplemental/likelySubtags/en" && value === "en-Latn-US") {
                    done();
                }
            }

            var cldr = new Cldr("root");
            Cldr.on("get", listener);
            cldr.get("supplemental/likelySubtags/en");
            Cldr.off("get", listener);
        });

    });

    describe("Cldr.off( \"get\", listener )", function () {

        it("should remove the specific listener from the global `get` event", function (done) {
            var status = new Error("Also removed wrong listener `listener2`");

            function listener1() {
                done(new Error("should not listen `listener1`"));
            }

            function listener2() {
                status = undefined; // Good.
            }

            var cldr = new Cldr("root");
            Cldr.on("get", listener1);
            Cldr.on("get", listener2);
            Cldr.off("get", listener1);
            cldr.get("something");
            Cldr.off("get", listener2);
            setTimeout(function () {
                done(status);
            });
        });

    });

    describe("Cldr.once( \"get\", listener )", function () {

        it("should add the listener to the global `get` event *once*", function (done) {
            var status = new Error("Did not listen");

            function listener(path) {
                if (path === "first") {
                    status = undefined; // Good.
                } else if (path === "second") {
                    status = new Error("Listened twice");
                }
            }

            var cldr = new Cldr("root");
            Cldr.once("get", listener);
            cldr.get("first");
            cldr.get("second");
            setTimeout(function () {
                done(status);
            });
        });

        it("should pass path and value to the listener", function (done) {
            function listener(path, value) {
                if (path === "supplemental/likelySubtags/en" && value === "en-Latn-US") {
                    done();
                }
            }

            var cldr = new Cldr("root");
            Cldr.once("get", listener);
            cldr.get("supplemental/likelySubtags/en");
        });

    });

    describe("cldr.on( \"get\", listener )", function () {

        it("should add the listener to the instance `get` event", function (done) {
            var status = new Error("Did not listen");

            function listener(path) {
                if (path === "something-from-cldr") {
                    status = undefined; // Good.
                } else {
                    status = new Error("Eavesdropping another instances");
                }
            }

            var cldr = new Cldr("root"),
                another = new Cldr("root");
            cldr.on("get", listener);
            cldr.get("something-from-cldr");
            another.get("something-from-another");
            cldr.off("get", listener);
            setTimeout(function () {
                done(status);
            });
        });

        it("should pass path and value to the listener", function (done) {
            function listener(path, value) {
                if (path === "supplemental/likelySubtags/en" && value === "en-Latn-US") {
                    done();
                }
            }

            var cldr = new Cldr("root");
            cldr.on("get", listener);
            cldr.get("supplemental/likelySubtags/en");
            cldr.off("get", listener);
        });

    });

    describe("cldr.off( \"get\", listener )", function () {

        it("should remove the specific listener from the instance `get` event", function (done) {
            var status = new Error("Also removed wrong listener `listener2`");

            function listener1() {
                done(new Error("should not listen `listener1`"));
            }

            function listener2() {
                status = undefined; // Good.
            }

            var cldr = new Cldr("root");
            cldr.on("get", listener1);
            cldr.on("get", listener2);
            cldr.off("get", listener1);
            cldr.get("something");
            cldr.off("get", listener2);
            setTimeout(function () {
                done(status);
            });
        });

    });

    describe("cldr.once( \"get\", listener )", function () {

        it("should add the listener to the instance `get` event *once*", function (done) {
            var status = new Error("Did not listen");

            function listener(path) {
                if (path === "first") {
                    status = undefined; // Good.
                } else if (path === "second") {
                    status = new Error("Listened twice");
                }
            }

            var cldr = new Cldr("root");
            cldr.once("get", listener);
            cldr.get("first");
            cldr.get("second");
            setTimeout(function () {
                done(status);
            });
        });

        it("should pass path and value to the listener", function (done) {
            function listener(path, value) {
                if (path === "supplemental/likelySubtags/en" && value === "en-Latn-US") {
                    done();
                }
            }

            var cldr = new Cldr("root");
            cldr.once("get", listener);
            cldr.get("supplemental/likelySubtags/en");
        });

    });

});