import { UITest } from "../../ui-test";
import { Label } from "@nativescript/core/ui/label";
import * as TKUnit from "../../tk-unit";
import * as helper from "../../ui-helper";
import * as tabViewTestsNative from "./bottom-navigation-tests-native";

import { BottomNavigation, TabContentItem, TabStrip, TabStripItem, SelectedIndexChangedEventData } from "@nativescript/core/ui/bottom-navigation";

export class BottomNavigationTest extends UITest<BottomNavigation> {

    public create(): BottomNavigation {
        var tabView = new BottomNavigation();
        tabView.id = "TabView";

        return tabView;
    }

    // public test_recycling() {
    //     const setters = new Map<string, Array<any>>();
    //     setters.set("items", this._createItems(3));
    //     helper.nativeView_recycling_test(() => new BottomNavigation(), null, null, setters);
    // }

    _createContentItems(count: number): Array<TabContentItem> {
        const items = new Array<TabContentItem>();
        for (let i = 0; i < count; i++) {
            const label = new Label();
            label.text = "Tab " + i;
            const tabEntry = new TabContentItem();
            tabEntry.content = label;
            items.push(tabEntry);
        }

        return items;
    }

    _createTabStrip(count: number): TabStrip {
        const items = new Array<TabStripItem>();
        for (let i = 0; i < count; i++) {
            let tabStripEntry = new TabStripItem();
            tabStripEntry.title = "Tab " + i;
            items.push(tabStripEntry);
        }

        const tabStrip = new TabStrip();
        tabStrip.items = items;

        return tabStrip;
    }

    public tearDown() {
        if (this.testView && this.testView.items) {
            this.testView.items.length = 0;
        }
        super.tearDown();
    }

    public waitUntilSelectedItemIsFullyLoaded(): boolean {
        const tabView = this.testView;
        if (!tabView.isLoaded) {
            return false;
        }

        const i = tabView.selectedIndex;
        if (i >= 0 && !tabView.items[i].isLoaded) {
            return false;
        }

        if (tabView.android) {
            const bottomNavigationBar = (<org.nativescript.widgets.BottomNavigationBar>(<any>tabView)._bottomNavigationBar);
            if (bottomNavigationBar.getItemCount() === 0) {
                return false;
            }
        }

        return true;
    }

    public test_when_created_items_are_undefined = function () {
        TKUnit.assertEqual(this.testView.items, undefined, "Items should be undefined initally.");
    };

    public test_when_created_selected_index_is_undefined = function () {
        TKUnit.assertEqual(this.testView.selectedIndex, -1, "selectedIndex should be undefined initally.");
    };

    // TODO: Do we need this test?
    public test_when_setting_items_to_non_empty_array_the_same_amount_of_native_tabs_is_created = function () {
        this.testView.items = this._createContentItems(5);
        this.waitUntilTestElementIsLoaded();

        let expectedValue = this.testView.items.length;
        let actualValue = tabViewTestsNative.getNativeTabCount(this.testView);

        TKUnit.assertEqual(actualValue, expectedValue, "NativeItems not equal to JS items.");
    };

    // TODO: Do we need this test?
    public test_when_setting_items_to_empty_array_zero_native_tabs_are_created = function () {
        var tabView = this.testView;
        tabView.items = [];
        this.waitUntilTestElementIsLoaded();

        var expectedValue = tabView.items.length;
        var actualValue = tabViewTestsNative.getNativeTabCount(tabView);

        TKUnit.assertEqual(actualValue, expectedValue, "Should have 0 native tabs.");
    };

    public test_selected_index_becomes_zero_when_items_bound_to_non_empty_array = function () {
        var tabView = this.testView;
        // var items = [];

        // var StackLayout0 = new StackLayout();
        // var label0 = new Label();
        // label0.text = "Tab 0";
        // StackLayout0.addChild(label0);
        // var tabEntry0 = new TabContentItem();
        // // tabEntry0.title = "Tab 0";
        // tabEntry0.view = StackLayout0;
        // items.push(tabEntry0);

        // var StackLayout1 = new StackLayout();
        // var label1 = new Label();
        // label1.text = "Tab 1";
        // StackLayout1.addChild(label1);
        // var tabEntry1 = new TabContentItem();
        // // tabEntry1.title = "Tab 1";
        // tabEntry1.view = StackLayout1;
        // items.push(tabEntry1);

        tabView.items = this._createContentItems(5);

        this.waitUntilTestElementIsLoaded();

        var expectedValue = 0;
        var actualValue = tabView.selectedIndex;
        TKUnit.assertEqual(actualValue, expectedValue, "When bound selectedIndex should be 0.");
    };

    public test_selected_index_becomes_undefined_when_items_bound_to_empty_array = function () {
        var tabView = this.testView;
        tabView.items = this._createContentItems(5);
        this.waitUntilTestElementIsLoaded();

        tabView.selectedIndex = 4;

        tabView.items = [];

        var expectedValue = -1;
        var actualValue = tabView.selectedIndex;
        TKUnit.assertEqual(actualValue, expectedValue, "selectedIndex should be undefined.");
    };

    public test_selected_index_becomes_undefined_when_items_set_to_undefined = function () {
        var tabView = this.testView;
        tabView.items = this._createContentItems(5);
        this.waitUntilTestElementIsLoaded();

        // tabView.selectedIndex = 4;

        tabView.items = undefined;

        var expectedValue = -1;
        var actualValue = tabView.selectedIndex;
        TKUnit.assertEqual(actualValue, expectedValue, "selectedIndex should be undefined.");
    };

    public test_selected_index_becomes_undefined_when_items_set_to_null = function () {
        var tabView = this.testView;
        tabView.items = this._createContentItems(5);
        tabView.selectedIndex = 4;
        this.waitUntilTestElementIsLoaded();

        tabView.items = null;

        var expectedValue = -1;
        var actualValue = tabView.selectedIndex;
        TKUnit.assertEqual(actualValue, expectedValue, "selectedIndex should be undefined.");
    };

    public test_items_is_resolved_correctly_if_set_before_view_is_loaded = function () {
        var tabView = this.testView;
        var expectedValue = 5;
        tabView.items = this._createContentItems(expectedValue);
        tabView.selectedIndex = 4;
        this.waitUntilTestElementIsLoaded();

        var actualValue = tabView.items.length;
        TKUnit.assertEqual(actualValue, expectedValue, "items.length should be 5");
    };

    public test_selected_index_is_resolved_correctly_if_set_before_view_is_loaded = function () {
        var tabView = this.testView;
        tabView.items = this._createContentItems(5);
        var expectedValue = 4;
        tabView.selectedIndex = expectedValue;
        this.waitUntilTestElementIsLoaded();

        var actualValue = tabView.selectedIndex;
        TKUnit.assertEqual(actualValue, expectedValue, "selectedIndex");
    };

    public test_binding_to_tabitem_with_undefined_view_should_throw = function () {
        var tabView = this.testView;
        this.waitUntilTestElementIsLoaded();

        TKUnit.assertThrows(() => {
            let item = new TabContentItem();
            // item.title = "Tab 0";
            item.content = undefined;
            tabView.items = [item];

        }, "Binding TabNavigation to a TabItem with undefined view should throw.");
    };

    public test_binding_to_tabitem_with_null_view_should_throw = function () {
        var tabView = this.testView;
        this.waitUntilTestElementIsLoaded();

        TKUnit.assertThrows(() => {
            let item = new TabContentItem();
            // item.title = "Tab 0";
            item.content = null;
            tabView.items = [item];

        }, "Binding TabNavigation to a TabItem with null view should throw.");
    };

    public test_when_selecting_tab_natively_selectedIndex_is_updated_properly = function () {
        var tabView = this.testView;
        tabView.items = this._createContentItems(2);
        tabView.tabStrip = this._createTabStrip(2);
        this.waitUntilTestElementIsLoaded();

        var expectedValue = 1;
        tabViewTestsNative.selectNativeTab(tabView, expectedValue);
        TKUnit.waitUntilReady(function () {
            return tabView.selectedIndex === expectedValue;
        }, helper.ASYNC);

        var actualValue = tabView.selectedIndex;
        TKUnit.assertEqual(actualValue, expectedValue, "selectedIndex");
    };

    public test_when_selecting_tab_natively_selectedIndexChangedEvent_is_raised = function () {
        var tabView = this.testView;
        tabView.items = this._createContentItems(5);
        tabView.tabStrip = this._createTabStrip(5);
        this.waitUntilTestElementIsLoaded();

        var expectedOldIndex = 3;
        var expectedNewIndex = 4;
        var actualOldIndex;
        var actualNewIndex;

        tabViewTestsNative.selectNativeTab(tabView, expectedOldIndex);
        TKUnit.waitUntilReady(function () {
            return tabView.selectedIndex === expectedOldIndex;
        }, helper.ASYNC);

        tabView.on(BottomNavigation.selectedIndexChangedEvent, (args: SelectedIndexChangedEventData) => {
            actualOldIndex = args.oldIndex;
            actualNewIndex = args.newIndex;
        });

        tabViewTestsNative.selectNativeTab(tabView, expectedNewIndex);
        TKUnit.waitUntilReady(function () {
            return tabView.selectedIndex === expectedNewIndex;
        }, helper.ASYNC);

        TKUnit.assertEqual(actualOldIndex, expectedOldIndex, "expectedOldIndex");
        TKUnit.assertEqual(actualNewIndex, expectedNewIndex, "expectedNewIndex");
    };

    // TODO: Do we need this test?
    public test_when_setting_selectedIndex_programatically_selectedIndexChangedEvent_is_raised = function () {
        var tabView = this.testView;
        tabView.items = this._createContentItems(5);
        this.waitUntilTestElementIsLoaded();

        var expectedOldIndex = 2;
        var expectedNewIndex = 4;
        var actualOldIndex;
        var actualNewIndex;

        tabView.selectedIndex = expectedOldIndex;
        TKUnit.waitUntilReady(function () {
            return tabViewTestsNative.getNativeSelectedIndex(tabView) === expectedOldIndex;
        }, helper.ASYNC);

        tabView.on(BottomNavigation.selectedIndexChangedEvent, (args: SelectedIndexChangedEventData) => {
            actualOldIndex = args.oldIndex;
            actualNewIndex = args.newIndex;
            TKUnit.assertEqual(args.object, tabView, "args.object should be TabView");
        });

        tabView.selectedIndex = expectedNewIndex;
        TKUnit.waitUntilReady(function () {
            return tabViewTestsNative.getNativeSelectedIndex(tabView) === expectedNewIndex;
        }, helper.ASYNC);

        TKUnit.assertEqual(actualOldIndex, expectedOldIndex, "expectedOldIndex");
        TKUnit.assertEqual(actualNewIndex, expectedNewIndex, "expectedNewIndex");
    };

    // TODO: fonts are not yet supported
    // public test_font_is_reapplied_when_tab_items_change = function () {
    //     const assertFontsAreEqual = (actual: any, expected: any, message?: string) => {
    //         if (this.testView.ios) {
    //             TKUnit.assertEqual(actual, expected, message);
    //         } else {
    //             TKUnit.assertEqual(actual.typeface, expected.typeface, `${message} [typeface]`);
    //             TKUnit.assertEqual(actual.size, expected.size, `${message} [size]`);
    //         }
    //     }

    //     this.testView.items = this._createContentItems(1);
    //     this.testView.tabStrip = this._createTabStrip(1);
    //     this.waitUntilSelectedItemIsFullyLoaded();

    //     const originalFont = tabViewTestsNative.getOriginalFont(this.testView);
    //     TKUnit.assertNotNull(originalFont, "Original Font should be applied");

    //     this.testView.style.font = "20 Pacifico";
    //     let nativeFont = tabViewTestsNative.getNativeFont(this.testView);
    //     TKUnit.assertNotNull(nativeFont, "Native Font should not be null");
    //     TKUnit.assertNotEqual(originalFont, nativeFont, "Font should be changed");

    //     this.testView.items = this._createContentItems(2);
    //     this.testView.tabStrip = this._createTabStrip(2);
    //     this.waitUntilSelectedItemIsFullyLoaded();
    //     assertFontsAreEqual(tabViewTestsNative.getNativeFont(this.testView), nativeFont, "Font must be 20 Pacifico after rebinding items.");

    //     this.testView.style.font = "bold 12 monospace";
    //     nativeFont = tabViewTestsNative.getNativeFont(this.testView);

    //     this.testView.items = this._createContentItems(3);
    //     this.testView.tabStrip = this._createTabStrip(3);
    //     this.waitUntilSelectedItemIsFullyLoaded();
    //     assertFontsAreEqual(tabViewTestsNative.getNativeFont(this.testView), nativeFont, "Font must be bold 12 monospace after rebinding items.");

    //     this.testView.style.font = unsetValue;
    //     assertFontsAreEqual(tabViewTestsNative.getNativeFont(this.testView), originalFont, "Font must be the original one after resetting the style.");
    // }
}

export function createTestCase(): BottomNavigationTest {
    return new BottomNavigationTest();
}