import * as TKUnit from "../../tk-unit";
import * as helper from "../../ui-helper";
import { View } from "@nativescript/core/ui/core/view";
import { Page } from "@nativescript/core/ui/page";
import { BindingOptions } from "@nativescript/core/ui/core/bindable";
import { Observable, EventData, PropertyChangeData } from "@nativescript/core/data/observable";
import { Color } from "@nativescript/core/color";
import { isIOS } from "@nativescript/core/platform";

// >> article-require-slider
import { Slider } from "@nativescript/core/ui/slider";
// << article-require-slider

// ### Binding the Progress and Slider value properties to a observable view-model property.

// >> article-binding-slider-properties
// function pageLoaded(args) {
//   var page = args.object;
//   var obj = new Observable();
//   obj.set("someProperty", 42);
//   page.bindingContext = obj;
// }
// exports.pageLoaded = pageLoaded;
// << article-binding-slider-properties

interface SliderValues {
    min?: number;
    max?: number;
    value?: number;
}

const TEST_VALUE = 50;
const MAX_TEST_VALUE = 70;
const MIN_TEST_VALUE = 10;
const VALUE_EVENT = "valueChange";
const MIN_VALUE_EVENT = "minValueChange";
const MAX_VALUE_EVENT = "maxValueChange";

function attachValueChangedEvents(slider: Slider, callback: (data: EventData) => void) {
    slider.on(VALUE_EVENT, callback);
    slider.on(MIN_VALUE_EVENT, callback);
    slider.on(MAX_VALUE_EVENT, callback);
}

function detachValueChangedEvents(slider: Slider) {
    slider.off(VALUE_EVENT);
    slider.off(MIN_VALUE_EVENT);
    slider.off(MAX_VALUE_EVENT);
}

export function test_recycling() {
    helper.nativeView_recycling_test(() => new Slider());
}

export function test_set_TNS_value_updates_native_value() {
    // >> article-creating-slider
    const slider = new Slider();
    // << article-creating-slider

    function testAction(views: Array<View>) {
        slider.value = TEST_VALUE;
        TKUnit.assertEqual(getNativeValue(slider), TEST_VALUE, "Native value is different from TNS value.");
    }

    helper.buildUIAndRunTest(slider, testAction);
}

export function test_set_native_value_updates_TNS_value() {
    const slider = new Slider();
    function testAction(views: Array<View>) {
        setNativeValue(slider, TEST_VALUE);
        TKUnit.assertEqual(slider.value, TEST_VALUE, "Native value is different from TNS value.");
    }

    helper.buildUIAndRunTest(slider, testAction);
}

export function test_set_native_value_triggers_propertyChanged() {
    const slider = new Slider();
    function testAction(views: Array<View>) {
        let valueChanged = false;
        let allChanges = 0;

        slider.on(VALUE_EVENT, function (data: EventData) {
            allChanges++;
            const propertyData = <PropertyChangeData>data;
            if (propertyData && propertyData.propertyName === "value" && propertyData.value === TEST_VALUE) {
                valueChanged = true;
            }
        });

        setNativeValue(slider, TEST_VALUE);

        slider.off(VALUE_EVENT);

        TKUnit.assert(valueChanged, "Property changed for value not called.");
        TKUnit.assertEqual(allChanges, 1, "Property changed callbacks.");
    }

    helper.buildUIAndRunTest(slider, testAction);
}

// Uncomment this when find way to check android Drawable color set by setColorFilter() method.
if (isIOS) {
    exports.test_set_color = function () {
        const slider = new Slider();
        slider.color = new Color("red");

        function testAction(views: Array<View>) {
            TKUnit.assertEqual(slider.color.ios.CGColor, slider.ios.thumbTintColor.CGColor, "slider.color");
        }

        helper.buildUIAndRunTest(slider, testAction);
    };

    exports.test_set_backgroundColor = function () {
        const slider = new Slider();
        slider.backgroundColor = new Color("red");

        function testAction(views: Array<View>) {
            TKUnit.assertEqual((<Color>slider.backgroundColor).ios.CGColor, slider.ios.minimumTrackTintColor.CGColor, "slider.backgroundColor");
        }

        helper.buildUIAndRunTest(slider, testAction);
    };
}

export function test_default_TNS_values() {
    const slider = new Slider();
    TKUnit.assertEqual(slider.value, 0, "Default slider.value");
    TKUnit.assertEqual(slider.minValue, 0, "Default slider.minValue");
    TKUnit.assertEqual(slider.maxValue, 100, "Default slider.maxValue");
}

export function test_default_native_values() {
    const slider = new Slider();

    function testAction(views: Array<View>) {
        TKUnit.assertEqual(getNativeValue(slider), 0, "Default native slider.value");
        TKUnit.assertEqual(getNativeMaxValue(slider), 100, "Default native slider.maxValue");
    }

    helper.buildUIAndRunTest(slider, testAction);
}

export function test_values_change_native_values() {
    const slider = new Slider();
    slider.minValue = 0;
    slider.value = 0;
    slider.maxValue = 10;
    function testAction(views: Array<View>) {
        TKUnit.assertEqual(getNativeValue(slider), 0, "1: wrong native slider.value");
        TKUnit.assertEqual(getNativeMaxValue(slider), 10, "1: Wrong native slider.maxValue");

        slider.value = 5;
        TKUnit.assertEqual(getNativeValue(slider), 5, "2: wrong native slider.value");
        TKUnit.assertEqual(getNativeMaxValue(slider), 10, "2: Wrong native slider.maxValue");

        slider.minValue = 10;
        TKUnit.assertEqual(getNativeValue(slider), isIOS ? 10 : 0, "3: wrong native slider.value");
        TKUnit.assertEqual(getNativeMaxValue(slider), isIOS ? 10 : 0, "3: Wrong native slider.maxValue");

        slider.maxValue = 20;
        TKUnit.assertEqual(getNativeValue(slider), isIOS ? 10 : 0, "4: wrong native slider.value");
        TKUnit.assertEqual(getNativeMaxValue(slider), isIOS ? 20 : 10, "4: Wrong native slider.maxValue");

        slider.value = 15;
        TKUnit.assertEqual(getNativeValue(slider), isIOS ? 15 : 5, "5: wrong native slider.value");
        TKUnit.assertEqual(getNativeMaxValue(slider), isIOS ? 20 : 10, "5: Wrong native slider.maxValue");
    }

    helper.buildUIAndRunTest(slider, testAction);
}

export function test_set_min_max_value() {
    const slider = new Slider();
    slider.minValue = MIN_TEST_VALUE;
    slider.maxValue = MAX_TEST_VALUE;
    slider.value = TEST_VALUE;

    function testAction(views: Array<View>) {
        assertSliderValuesDefault(slider);
    }

    helper.buildUIAndRunTest(slider, testAction);
}

export function test_set_min_value_max() {
    const slider = new Slider();
    slider.minValue = MIN_TEST_VALUE;
    slider.value = TEST_VALUE;
    slider.maxValue = MAX_TEST_VALUE;

    function testAction(views: Array<View>) {
        assertSliderValuesDefault(slider);
    }

    helper.buildUIAndRunTest(slider, testAction);
}

export function test_set_max_min_value() {
    const slider = new Slider();
    slider.maxValue = MAX_TEST_VALUE;
    slider.minValue = MIN_TEST_VALUE;
    slider.value = TEST_VALUE;

    function testAction(views: Array<View>) {
        assertSliderValuesDefault(slider);
    }

    helper.buildUIAndRunTest(slider, testAction);
}

export function test_set_max_value_min() {
    const slider = new Slider();
    slider.maxValue = MAX_TEST_VALUE;
    slider.value = TEST_VALUE;
    slider.minValue = MIN_TEST_VALUE;

    function testAction(views: Array<View>) {
        assertSliderValuesDefault(slider);
    }

    helper.buildUIAndRunTest(slider, testAction);
}

export function test_set_value_min_max() {
    const slider = new Slider();
    slider.value = TEST_VALUE;
    slider.minValue = MIN_TEST_VALUE;
    slider.maxValue = MAX_TEST_VALUE;

    function testAction(views: Array<View>) {
        assertSliderValuesDefault(slider);
    }

    helper.buildUIAndRunTest(slider, testAction);
}

export function test_set_value_max_min() {
    const slider = new Slider();
    slider.value = TEST_VALUE;
    slider.maxValue = MAX_TEST_VALUE;
    slider.minValue = MIN_TEST_VALUE;

    function testAction(views: Array<View>) {
        assertSliderValuesDefault(slider);
    }

    helper.buildUIAndRunTest(slider, testAction);
}

export function test_set_value_less_than_min_should_set_value_to_min() {
    const slider = new Slider();

    function testAction(views: Array<View>) {
        slider.value = -10;
        assertSliderValues(slider, { value: 0 });
    }

    helper.buildUIAndRunTest(slider, testAction);
}

export function test_set_value_greater_than_max_should_set_value_to_max() {
    const slider = new Slider();

    function testAction(views: Array<View>) {
        slider.maxValue = 10;
        slider.value = 20;
        assertSliderValues(slider, { value: 10 });
    }

    helper.buildUIAndRunTest(slider, testAction);
}

export function test_set_maxValue_should_adjust_value() {
    const slider = new Slider();
    slider.maxValue = 100;
    slider.value = 50;
    slider.minValue = 0;

    function testAction(views: Array<View>) {
        slider.maxValue = 40;

        TKUnit.assertEqual(slider.maxValue, 40, "slider.maxValue");
        TKUnit.assertEqual(slider.value, 40, "slider.value");
    }

    helper.buildUIAndRunTest(slider, testAction);
}

export function test_set_maxValue_should_adjust_value_but_respect_minValue() {
    const slider = new Slider();

    // >> article-setting-slider-values
    slider.maxValue = 120;
    slider.value = 80;
    slider.minValue = 50;
    // << article-setting-slider-values

    function testAction(views: Array<View>) {
        slider.maxValue = 30;
        assertSliderValues(slider, { min: 50, max: 50, value: 50 });
    }

    helper.buildUIAndRunTest(slider, testAction);
}

export function test_set_minValue_should_adjust_value() {
    const slider = new Slider();
    slider.maxValue = 100;
    slider.value = 50;
    slider.minValue = 0;

    function testAction(views: Array<View>) {
        slider.minValue = 60;
        assertSliderValues(slider, { min: 60, value: 60 });
    }

    helper.buildUIAndRunTest(slider, testAction);
}

export function test_set_minValue_should_adjust_value_and_maxValue() {
    const slider = new Slider();
    slider.maxValue = 100;
    slider.value = 50;
    slider.minValue = 0;

    function testAction(views: Array<View>) {
        const newMin = 120;
        slider.minValue = newMin;
        assertSliderValues(slider, { min: newMin, max: newMin, value: newMin });
    }

    helper.buildUIAndRunTest(slider, testAction);
}

export function test_property_changed_event_when_setting_minValue_no_adjust() {
    const slider = new Slider();
    slider.maxValue = 100;
    slider.value = 50;
    slider.minValue = 0;

    function testAction(views: Array<View>) {
        const changedProperties = {};
        let allChanges = 0;
        attachValueChangedEvents(slider, (data: PropertyChangeData) => {
            allChanges++;
            changedProperties[data.propertyName] = true;
        });

        // Act
        slider.minValue = 10;
        detachValueChangedEvents(slider);

        // Assert
        TKUnit.assert(changedProperties["minValue"], "Property changed for minValue not called.");
        TKUnit.assertEqual(allChanges, 1, "Property changed callbacks.");
    }

    helper.buildUIAndRunTest(slider, testAction);
}

export function test_property_changed_event_when_setting_minValue_with_adjust() {
    const slider = new Slider();
    slider.maxValue = 100;
    slider.value = 50;
    slider.minValue = 0;

    function testAction(views: Array<View>) {
        const changedProperties = {};
        let allChanges = 0;
        attachValueChangedEvents(slider, (data: PropertyChangeData) => {
            allChanges++;
            changedProperties[data.propertyName] = true;
        });

        // Act
        slider.minValue = 60;
        detachValueChangedEvents(slider);

        // Assert
        TKUnit.assert(changedProperties["value"], "Property changed for 'value' not called.");
        TKUnit.assert(changedProperties["minValue"], "Property changed for 'minValue' not called.");
        TKUnit.assertEqual(allChanges, 2, "Property changed callbacks.");
    }

    helper.buildUIAndRunTest(slider, testAction);
}

export function test_property_changed_event_when_setting_maxValue_no_adjust() {
    const slider = new Slider();
    slider.maxValue = 100;
    slider.value = 50;
    slider.minValue = 0;

    function testAction(views: Array<View>) {
        const changedProperties = {};
        let allChanges = 0;
        attachValueChangedEvents(slider, (data: PropertyChangeData) => {
            allChanges++;
            changedProperties[data.propertyName] = true;
        });

        // Act
        slider.maxValue = 200;
        detachValueChangedEvents(slider);

        // Assert
        TKUnit.assert(changedProperties["maxValue"], "Property changed for maxValue not called.");
        TKUnit.assertEqual(allChanges, 1, "Property changed callbacks.");
    }

    helper.buildUIAndRunTest(slider, testAction);
}

export function test_property_changed_event_when_setting_maxValue_with_adjust() {
    const slider = new Slider();
    slider.maxValue = 100;
    slider.value = 50;
    slider.minValue = 0;

    function testAction(views: Array<View>) {
        const changedProperties = {};
        let allChanges = 0;
        attachValueChangedEvents(slider, (data: PropertyChangeData) => {
            allChanges++;
            changedProperties[data.propertyName] = true;
        });

        // Act
        slider.maxValue = 40;
        slider.off(Observable.propertyChangeEvent);

        // Assert
        TKUnit.assert(changedProperties["value"], "Property changed for 'value' not called.");
        TKUnit.assert(changedProperties["maxValue"], "Property changed for 'maxValue' not called.");
        TKUnit.assertEqual(allChanges, 2, "Property changed callbacks.");
    }

    helper.buildUIAndRunTest(slider, testAction);
}

export function test_binding_value_to_model() {
    const slider = new Slider();

    function testAction(views: Array<View>) {
        // >> article-binding-value-property
        const model = new Observable();
        model.set("age", 21);
        const options: BindingOptions = {
            sourceProperty: "age",
            targetProperty: "value"
        };
        slider.bind(options, model);
        // slider.value is now 21
        // >> (hide)
        TKUnit.assertEqual(slider.value, 21, "slider.value");
        // << (hide)
        model.set("age", 22);
        // slider.value is now 22
        // >> (hide)
        TKUnit.assertEqual(slider.value, 22, "slider.value");
        // << (hide)
        // << article-binding-value-property
    }

    helper.buildUIAndRunTest(slider, testAction);
}

export function test_binding_value_to_bindingContext() {
    const slider = new Slider();

    function testAction(views: Array<View>) {
        const page = <Page>views[1];

        const model = new Observable();
        model.set("age", 21);
        page.bindingContext = model;

        const options: BindingOptions = {
            sourceProperty: "age",
            targetProperty: "value"
        };
        slider.bind(options);

        TKUnit.assertEqual(slider.value, 21, "slider.value");
        model.set("age", 22);
        TKUnit.assertEqual(slider.value, 22, "slider.value");
    }

    helper.buildUIAndRunTest(slider, testAction);
}

function assertSliderValuesDefault(slider: Slider) {
    return assertSliderValues(slider, { min: MIN_TEST_VALUE, max: MAX_TEST_VALUE, value: TEST_VALUE });
}

function assertSliderValues(slider: Slider, { min, max, value }: SliderValues) {
    // tslint:disable
    min !== undefined && TKUnit.assertEqual(slider.minValue, min, "slider.minValue");
    max !== undefined && TKUnit.assertEqual(slider.maxValue, max, "slider.maxValue");
    value !== undefined && TKUnit.assertEqual(slider.value, value, "slider.value");
    // tslint:enable
}

function getNativeValue(slider: Slider): number {
    if (slider.android) {
        return slider.android.getProgress();
    } else if (slider.ios) {
        return slider.ios.value;
    }
}

function getNativeMaxValue(slider: Slider): number {
    if (slider.android) {
        return slider.android.getMax();
    } else if (slider.ios) {
        return slider.ios.maximumValue;
    }
}

function setNativeValue(slider: Slider, value: number) {
    if (slider.android) {
        const seekBar = (<android.widget.SeekBar>slider.android);
        seekBar.setProgress(value);
    } else if (slider.ios) {
        slider.ios.value = value;

        // setting value trough code does not send notification, so simulate that manually.
        slider.ios.sendActionsForControlEvents(UIControlEvents.ValueChanged);
    }
}