defineSuite([
        'Scene/WebMapTileServiceImageryProvider',
        'Core/Clock',
        'Core/ClockStep',
        'Core/Credit',
        'Core/DefaultProxy',
        'Core/GeographicTilingScheme',
        'Core/JulianDate',
        'Core/objectToQuery',
        'Core/queryToObject',
        'Core/Request',
        'Core/RequestScheduler',
        'Core/RequestState',
        'Core/Resource',
        'Core/TimeIntervalCollection',
        'Core/WebMercatorTilingScheme',
        'Scene/Imagery',
        'Scene/ImageryLayer',
        'Scene/ImageryProvider',
        'Scene/ImageryState',
        'Specs/pollToPromise',
        'ThirdParty/Uri'
    ], function(
        WebMapTileServiceImageryProvider,
        Clock,
        ClockStep,
        Credit,
        DefaultProxy,
        GeographicTilingScheme,
        JulianDate,
        objectToQuery,
        queryToObject,
        Request,
        RequestScheduler,
        RequestState,
        Resource,
        TimeIntervalCollection,
        WebMercatorTilingScheme,
        Imagery,
        ImageryLayer,
        ImageryProvider,
        ImageryState,
        pollToPromise,
        Uri) {
    'use strict';

    beforeEach(function() {
        RequestScheduler.clearForSpecs();
    });

    afterEach(function() {
        Resource._Implementations.createImage = Resource._DefaultImplementations.createImage;
    });

    it('conforms to ImageryProvider interface', function() {
        expect(WebMapTileServiceImageryProvider).toConformToInterface(ImageryProvider);
    });

    it('generates expected tile urls', function() {
        var options = {
            url : 'http://wmts.invalid',
            format : 'image/png',
            layer : 'someLayer',
            style : 'someStyle',
            tileMatrixSetID : 'someTMS',
            tileMatrixLabels : ['first', 'second', 'third']
        };

        var provider = new WebMapTileServiceImageryProvider(options);

        spyOn(ImageryProvider, 'loadImage');

        var tilecol = 12;
        var tilerow = 5;
        var level = 1;
        provider.requestImage(tilecol, tilerow, level);
        var uri = new Uri(ImageryProvider.loadImage.calls.mostRecent().args[1].url);
        var queryObject = queryToObject(uri.query);

        expect(queryObject.request).toEqual('GetTile');
        expect(queryObject.service).toEqual('WMTS');
        expect(queryObject.version).toEqual('1.0.0');
        expect(queryObject.format).toEqual(options.format);
        expect(queryObject.layer).toEqual(options.layer);
        expect(queryObject.style).toEqual(options.style);
        expect(parseInt(queryObject.tilecol, 10)).toEqual(tilecol);
        expect(queryObject.tilematrixset).toEqual(options.tileMatrixSetID);
        expect(queryObject.tilematrix).toEqual(options.tileMatrixLabels[level]);
        expect(parseInt(queryObject.tilerow, 10)).toEqual(tilerow);

        tilecol = 1;
        tilerow = 3;
        level = 2;
        provider.requestImage(tilecol, tilerow, level);
        uri = new Uri(ImageryProvider.loadImage.calls.mostRecent().args[1].url);
        queryObject = queryToObject(uri.query);

        expect(queryObject.request).toEqual('GetTile');
        expect(queryObject.service).toEqual('WMTS');
        expect(queryObject.version).toEqual('1.0.0');
        expect(queryObject.format).toEqual(options.format);
        expect(queryObject.layer).toEqual(options.layer);
        expect(queryObject.style).toEqual(options.style);
        expect(parseInt(queryObject.tilecol, 10)).toEqual(tilecol);
        expect(queryObject.tilematrixset).toEqual(options.tileMatrixSetID);
        expect(queryObject.tilematrix).toEqual(options.tileMatrixLabels[level]);
        expect(parseInt(queryObject.tilerow, 10)).toEqual(tilerow);
    });

    it('supports subdomains string urls', function() {
        var options = {
            url : '{s}',
            layer : '',
            style : '',
            subdomains : '123',
            tileMatrixSetID : ''
        };

        var provider = new WebMapTileServiceImageryProvider(options);

        spyOn(ImageryProvider, 'loadImage');

        var tilecol = 1;
        var tilerow = 1;
        var level = 1;
        provider.requestImage(tilecol, tilerow, level);
        var url = ImageryProvider.loadImage.calls.mostRecent().args[1].getUrlComponent();
        expect('123'.indexOf(url)).toBeGreaterThanOrEqualTo(0);
    });

    it('supports subdomains array urls', function() {
        var options = {
            url : '{s}',
            layer : '',
            style : '',
            subdomains : ['foo', 'bar'],
            tileMatrixSetID : ''
        };

        var provider = new WebMapTileServiceImageryProvider(options);

        spyOn(ImageryProvider, 'loadImage');

        var tilecol = 1;
        var tilerow = 1;
        var level = 1;
        provider.requestImage(tilecol, tilerow, level);
        var url = ImageryProvider.loadImage.calls.mostRecent().args[1].getUrlComponent();
        expect(['foo', 'bar'].indexOf(url)).toBeGreaterThanOrEqualTo(0);
    });

    it('generates expected tile urls from template', function() {
        var options = {
            url : 'http://wmts.invalid/{style}/{TileMatrixSet}/{TileMatrix}/{TileRow}/{TileCol}.png',
            format : 'image/png',
            layer : 'someLayer',
            style : 'someStyle',
            tileMatrixSetID : 'someTMS',
            tileMatrixLabels : ['first', 'second', 'third']
        };

        var provider = new WebMapTileServiceImageryProvider(options);

        spyOn(ImageryProvider, 'loadImage');

        var tilecol = 12;
        var tilerow = 5;
        var level = 1;
        provider.requestImage(tilecol, tilerow, level);
        var uri = new Uri(ImageryProvider.loadImage.calls.mostRecent().args[1].getUrlComponent());
        expect(uri.toString()).toEqual('http://wmts.invalid/someStyle/someTMS/second/5/12.png');
    });

    it('requires the url to be specified', function() {
        function createWithoutUrl() {
            return new WebMapTileServiceImageryProvider({
                layer : 'someLayer',
                style : 'someStyle',
                tileMatrixSetID : 'someTMS'
            });
        }

        expect(createWithoutUrl).toThrowDeveloperError();
    });

    it('requires the layer to be specified', function() {
        function createWithoutLayer() {
            return new WebMapTileServiceImageryProvider({
                url : 'http://wmts.invalid',
                style : 'someStyle',
                tileMatrixSetID : 'someTMS'
            });
        }

        expect(createWithoutLayer).toThrowDeveloperError();
    });

    it('requires the style to be specified', function() {
        function createWithoutStyle() {
            return new WebMapTileServiceImageryProvider({
                layer : 'someLayer',
                url : 'http://wmts.invalid',
                tileMatrixSetID : 'someTMS'
            });
        }

        expect(createWithoutStyle).toThrowDeveloperError();
    });

    it('requires the tileMatrixSetID to be specified', function() {
        function createWithoutTMS() {
            return new WebMapTileServiceImageryProvider({
                layer : 'someLayer',
                style : 'someStyle',
                url : 'http://wmts.invalid'
            });
        }

        expect(createWithoutTMS).toThrowDeveloperError();
    });

    it('requires clock if times is specified', function() {
        function createWithoutClock() {
            return new WebMapTileServiceImageryProvider({
                layer : 'someLayer',
                style : 'someStyle',
                url : 'http://wmts.invalid',
                tileMatrixSetID : 'someTMS',
                times : new TimeIntervalCollection()
            });
        }

        expect(createWithoutClock).toThrowDeveloperError();
    });

    it('resolves readyPromise', function() {
        var provider = new WebMapTileServiceImageryProvider({
            layer : 'someLayer',
            style : 'someStyle',
            url : 'http://wmts.invalid',
            tileMatrixSetID : 'someTMS'
        });

        return provider.readyPromise.then(function(result) {
            expect(result).toBe(true);
            expect(provider.ready).toBe(true);
        });
    });

    it('resolves readyPromise with Resource', function() {
        var resource = new Resource({
            url : 'http://wmts.invalid'
        });

        var provider = new WebMapTileServiceImageryProvider({
            layer : 'someLayer',
            style : 'someStyle',
            url : resource,
            tileMatrixSetID : 'someTMS'
        });

        return provider.readyPromise.then(function(result) {
            expect(result).toBe(true);
            expect(provider.ready).toBe(true);
        });
    });

    // default parameters values
    it('uses default values for undefined parameters', function() {
        var provider = new WebMapTileServiceImageryProvider({
            layer : 'someLayer',
            style : 'someStyle',
            url : 'http://wmts.invalid',
            tileMatrixSetID : 'someTMS'
        });
        expect(provider.format).toEqual('image/jpeg');
        expect(provider.tileWidth).toEqual(256);
        expect(provider.tileHeight).toEqual(256);
        expect(provider.minimumLevel).toEqual(0);
        expect(provider.maximumLevel).toBeUndefined();
        expect(provider.tilingScheme).toBeInstanceOf(WebMercatorTilingScheme);
        expect(provider.rectangle).toEqual(provider.tilingScheme.rectangle);
        expect(provider.credit).toBeUndefined();
        expect(provider.proxy).toBeUndefined();
    });

    // non default parameters values
    it('uses parameters passed to constructor', function() {
        var tilingScheme = new GeographicTilingScheme();
        var rectangle = new WebMercatorTilingScheme().rectangle;
        var provider = new WebMapTileServiceImageryProvider({
            layer : 'someLayer',
            style : 'someStyle',
            url : 'http://wmts.invalid',
            tileMatrixSetID : 'someTMS',
            format : 'someFormat',
            tileWidth : 512,
            tileHeight : 512,
            tilingScheme : tilingScheme,
            minimumLevel : 0,
            maximumLevel : 12,
            rectangle : rectangle,
            credit : 'Thanks for using our WMTS server.'
        });
        expect(provider.format).toEqual('someFormat');
        expect(provider.tileWidth).toEqual(512);
        expect(provider.tileHeight).toEqual(512);
        expect(provider.minimumLevel).toEqual(0);
        expect(provider.maximumLevel).toEqual(12);
        expect(provider.tilingScheme).toEqual(tilingScheme);
        expect(provider.credit).toBeDefined();
        expect(provider.credit).toBeInstanceOf(Credit);
        expect(provider.rectangle).toEqual(rectangle);
    });

    it("doesn't care about trailing question mark at the end of URL", function() {
        var provider1 = new WebMapTileServiceImageryProvider({
            layer : 'someLayer',
            style : 'someStyle',
            url : 'http://wmts.invalid',
            tileMatrixSetID : 'someTMS'
        });
        var provider2 = new WebMapTileServiceImageryProvider({
            layer : 'someLayer',
            style : 'someStyle',
            url : 'http://wmts.invalid?',
            tileMatrixSetID : 'someTMS'
        });

        return pollToPromise(function() {
            return provider1.ready && provider2.ready;
        }).then(function() {
            spyOn(Resource._Implementations, 'createImage').and.callFake(function(url, crossOrigin, deferred) {
                // Just return any old image.
                Resource._DefaultImplementations.createImage('Data/Images/Red16x16.png', crossOrigin, deferred);
            });

            return provider1.requestImage(0, 0, 0).then(function(image) {
                return provider2.requestImage(0, 0, 0).then(function(image) {
                    expect(Resource._Implementations.createImage.calls.count()).toEqual(2);
                    //expect the two image URLs to be the same between the two providers
                    var allCalls = Resource._Implementations.createImage.calls.all();
                    expect(allCalls[1].args[0]).toEqual(allCalls[0].args[0]);
                });
            });
        });
    });

    it('requestImage returns a promise for an image and loads it for cross-origin use', function() {
        var provider = new WebMapTileServiceImageryProvider({
            layer : 'someLayer',
            style : 'someStyle',
            url : 'http://wmts.invalid',
            tileMatrixSetID : 'someTMS'
        });

        return pollToPromise(function() {
            return provider.ready;
        }).then(function() {
            spyOn(Resource._Implementations, 'createImage').and.callFake(function(url, crossOrigin, deferred) {
                // Just return any old image.
                Resource._DefaultImplementations.createImage('Data/Images/Red16x16.png', crossOrigin, deferred);
            });

            return provider.requestImage(0, 0, 0).then(function(image) {
                expect(Resource._Implementations.createImage).toHaveBeenCalled();
                expect(image).toBeInstanceOf(Image);
            });
        });
    });

    it('raises error event when image cannot be loaded', function() {
        var provider = new WebMapTileServiceImageryProvider({
            layer : 'someLayer',
            style : 'someStyle',
            url : 'http://wmts.invalid',
            tileMatrixSetID : 'someTMS'
        });

        var layer = new ImageryLayer(provider);

        var tries = 0;
        provider.errorEvent.addEventListener(function(error) {
            expect(error.timesRetried).toEqual(tries);
            ++tries;
            if (tries < 3) {
                error.retry = true;
            }
            setTimeout(function() {
                RequestScheduler.update();
            }, 1);
        });

        Resource._Implementations.createImage = function(url, crossOrigin, deferred) {
            if (tries === 2) {
                // Succeed after 2 tries
                Resource._DefaultImplementations.createImage('Data/Images/Red16x16.png', crossOrigin, deferred);
            } else {
                // fail
                setTimeout(function() {
                    deferred.reject();
                }, 1);
            }
        };

        return pollToPromise(function() {
            return provider.ready;
        }).then(function() {
            var imagery = new Imagery(layer, 0, 0, 0);
            imagery.addReference();
            layer._requestImagery(imagery);
            RequestScheduler.update();

            return pollToPromise(function() {
                return imagery.state === ImageryState.RECEIVED;
            }).then(function() {
                expect(imagery.image).toBeInstanceOf(Image);
                expect(tries).toEqual(2);
                imagery.releaseReference();
            });
        });
    });

    it('tiles preload on requestImage as we approach the next time interval', function() {
        var times = TimeIntervalCollection.fromIso8601({
            iso8601: '2017-04-26/2017-04-30/P1D',
            dataCallback: function(interval, index) {
                return {
                    Time: JulianDate.toIso8601(interval.start)
                };
            }
        });
        var clock = new Clock({
            currentTime : JulianDate.fromIso8601('2017-04-26'),
            shouldAnimate : true
        });

        var provider = new WebMapTileServiceImageryProvider({
            layer : 'someLayer',
            style : 'someStyle',
            url : 'http://wmts.invalid/{Time}',
            tileMatrixSetID : 'someTMS',
            clock : clock,
            times : times
        });

        Resource._Implementations.createImage = function(url, crossOrigin, deferred) {
            Resource._DefaultImplementations.createImage('Data/Images/Red16x16.png', crossOrigin, deferred);
        };

        var entry;
        return pollToPromise(function() {
            return provider.ready;
        })
            .then(function() {
                clock.currentTime = JulianDate.fromIso8601('2017-04-26T23:59:56Z');
                return provider.requestImage(0, 0, 0, new Request());
            })
            .then(function() {
                RequestScheduler.update();

                // Test tile 0,0,0 was prefetched
                var cache = provider._timeDynamicImagery._tileCache;
                expect(cache['1']).toBeDefined();
                entry = cache['1']['0-0-0'];
                expect(entry).toBeDefined();
                expect(entry.promise).toBeDefined();
                return entry.promise;
            })
            .then(function() {
                expect(entry.request).toBeDefined();
                expect(entry.request.state).toEqual(RequestState.RECEIVED);
            });
    });

    it('tiles preload onTick event as we approach the next time interval', function() {
        var times = TimeIntervalCollection.fromIso8601({
            iso8601: '2017-04-26/2017-04-30/P1D',
            dataCallback: function(interval, index) {
                return {
                    Time: JulianDate.toIso8601(interval.start)
                };
            }
        });
        var clock = new Clock({
            currentTime : JulianDate.fromIso8601('2017-04-26'),
            shouldAnimate : true
        });

        var provider = new WebMapTileServiceImageryProvider({
            layer : 'someLayer',
            style : 'someStyle',
            url : 'http://wmts.invalid/{Time}',
            tileMatrixSetID : 'someTMS',
            clock : clock,
            times : times
        });

        Resource._Implementations.createImage = function(url, crossOrigin, deferred) {
            Resource._DefaultImplementations.createImage('Data/Images/Red16x16.png', crossOrigin, deferred);
        };

        var entry;
        return pollToPromise(function() {
            return provider.ready;
        })
            .then(function() {
                return provider.requestImage(0, 0, 0, new Request());
            })
            .then(function() {
                // Test tile 0,0,0 wasn't prefetched
                var cache = provider._timeDynamicImagery._tileCache;
                expect(cache['1']).toBeUndefined();

                // Update the clock and process any requests
                clock.currentTime = JulianDate.fromIso8601('2017-04-26T23:59:55Z');
                clock.tick();
                RequestScheduler.update();

                // Test tile 0,0,0 was prefetched
                expect(cache['1']).toBeDefined();
                entry = cache['1']['0-0-0'];
                expect(entry).toBeDefined();
                expect(entry.promise).toBeDefined();
                return entry.promise;
            })
            .then(function() {
                expect(entry.request).toBeDefined();
                expect(entry.request.state).toEqual(RequestState.RECEIVED);
            });
    });

    it('reload is called once we cross into next interval', function() {
        var times = TimeIntervalCollection.fromIso8601({
            iso8601: '2017-04-26/2017-04-30/P1D',
            dataCallback: function(interval, index) {
                return {
                    Time: JulianDate.toIso8601(interval.start)
                };
            }
        });
        var clock = new Clock({
            currentTime : JulianDate.fromIso8601('2017-04-26'),
            clockStep : ClockStep.TICK_DEPENDENT,
            shouldAnimate : true
        });

        Resource._Implementations.createImage = function(url, crossOrigin, deferred) {
            Resource._DefaultImplementations.createImage('Data/Images/Red16x16.png', crossOrigin, deferred);
        };

        var provider = new WebMapTileServiceImageryProvider({
            layer : 'someLayer',
            style : 'someStyle',
            url : 'http://wmts.invalid/{Time}',
            tileMatrixSetID : 'someTMS',
            clock : clock,
            times : times
        });

        provider._reload = jasmine.createSpy();
        spyOn(provider._timeDynamicImagery, 'getFromCache').and.callThrough();

        return pollToPromise(function() {
            return provider.ready;
        })
            .then(function() {
                clock.currentTime = JulianDate.fromIso8601('2017-04-26T23:59:59Z');
                return provider.requestImage(0, 0, 0, new Request());
            })
            .then(function() {
                RequestScheduler.update();
                clock.tick();

                return provider.requestImage(0, 0, 0, new Request());
            })
            .then(function() {
                expect(provider._reload.calls.count()).toEqual(1);

                var calls = provider._timeDynamicImagery.getFromCache.calls.all();
                expect(calls.length).toBe(2);
                expect(calls[0].returnValue).toBeUndefined();
                expect(calls[1].returnValue).toBeDefined();
            });
    });

    it('dimensions work with RESTful requests', function() {
        var lastUrl;
        Resource._Implementations.createImage = function(url, crossOrigin, deferred) {
            lastUrl = url;
            Resource._DefaultImplementations.createImage('Data/Images/Red16x16.png', crossOrigin, deferred);
        };

        var provider = new WebMapTileServiceImageryProvider({
            layer : 'someLayer',
            style : 'someStyle',
            url : 'http://wmts.invalid/{FOO}',
            tileMatrixSetID : 'someTMS',
            dimensions : {
                FOO: 'BAR'
            }
        });

        provider._reload = jasmine.createSpy();

        return pollToPromise(function() {
            return provider.ready;
        })
            .then(function() {
                return provider.requestImage(0, 0, 0, new Request());
            })
            .then(function() {
                expect(lastUrl).toStartWith('http://wmts.invalid/BAR');
                expect(provider._reload.calls.count()).toEqual(0);
                provider.dimensions = {
                    FOO : 'BAZ'
                };
                expect(provider._reload.calls.count()).toEqual(1);
                return provider.requestImage(0, 0, 0, new Request());
            })
            .then(function() {
                expect(lastUrl).toStartWith('http://wmts.invalid/BAZ');
            });
    });

    it('dimensions work with KVP requests', function() {
        var lastUrl;
        Resource._Implementations.createImage = function(url, crossOrigin, deferred) {
            lastUrl = url;
            Resource._DefaultImplementations.createImage('Data/Images/Red16x16.png', crossOrigin, deferred);
        };

        var uri = new Uri('http://wmts.invalid/kvp');
        var query = {
            tilematrix : 0,
            layer : 'someLayer',
            style : 'someStyle',
            tilerow : 0,
            tilecol : 0,
            tilematrixset : 'someTMS',
            format : 'image/jpeg',
            FOO : 'BAR',
            service: 'WMTS',
            version: '1.0.0',
            request: 'GetTile'
        };

        var provider = new WebMapTileServiceImageryProvider({
            layer : query.layer,
            style : query.style,
            url : uri.toString(),
            tileMatrixSetID : query.tilematrixset,
            dimensions : {
                FOO: query.FOO
            }
        });

        provider._reload = jasmine.createSpy();

        return pollToPromise(function() {
            return provider.ready;
        })
            .then(function() {
                return provider.requestImage(0, 0, 0, new Request());
            })
            .then(function() {
                // Verify request is correct
                uri.query = objectToQuery(query);
                expect(lastUrl).toEqual(uri.toString());
                expect(provider._reload.calls.count()).toEqual(0);

                // Change value of FOO dimension
                query.FOO = 'BAZ';
                provider.dimensions = {
                    FOO : query.FOO
                };
                expect(provider._reload.calls.count()).toEqual(1);
                return provider.requestImage(0, 0, 0, new Request());
            })
            .then(function() {
                // Verify request changed
                uri.query = objectToQuery(query);
                expect(lastUrl).toEqual(uri.toString());
            });
    });
});