import * as TKUnit from "../../tk-unit";
import * as helper from "../../ui-helper";
import * as viewModule from "@nativescript/core/ui/core/view";
import * as listPickerTestsNative from "./list-picker-tests-native";
import * as application from "@nativescript/core/application";

// >> article-require-listpicker-module
import * as listPickerModule from "@nativescript/core/ui/list-picker";
// << article-require-listpicker-module

function _createListPicker(): listPickerModule.ListPicker {
    // >> article-create-listpicker
    var listPicker = new listPickerModule.ListPicker();
    // << article-create-listpicker
    listPicker.id = "ListPicker";

    return listPicker;
}

function _createItems(count: number): Array<number> {
    var items = new Array<number>();
    for (var i = 0; i < count; i++) {
        items.push(i);
    }

    return items;
}

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

export var testWhenlistPickerIsCreatedItemsAreUndefined = function () {
    helper.buildUIAndRunTest(_createListPicker(), function (views: Array<viewModule.View>) {
        var listPicker = <listPickerModule.ListPicker>views[0];
        var expectedValue = undefined;
        var actualValue = listPicker.items;
        TKUnit.assert(actualValue === expectedValue, "Actual: " + actualValue + "; Expected: " + expectedValue);
    });
};

export var testWhenlistPickerIsCreatedSelectedIndexIsUndefined = function () {
    helper.buildUIAndRunTest(_createListPicker(), function (views: Array<viewModule.View>) {
        var listPicker = <listPickerModule.ListPicker>views[0];
        var expectedValue = -1;
        var actualValue = listPicker.selectedIndex;
        TKUnit.assert(actualValue === expectedValue, "Actual: " + actualValue + "; Expected: " + expectedValue);
    });
};

export var testWhenSettingItemsToNonEmptyArrayTheSameAmountOfNativeItemsIsCreated = function () {
    helper.buildUIAndRunTest(_createListPicker(), function (views: Array<viewModule.View>) {
        var listPicker = <listPickerModule.ListPicker>views[0];
        listPicker.items = _createItems(10);
        var expectedValue = listPicker.items.length;
        var actualValue = listPickerTestsNative.getNativeItemsCount(listPicker);
        TKUnit.assert(actualValue === expectedValue, "Actual: " + actualValue + "; Expected: " + expectedValue);
    });
};

export var testWhenSettingItemsToEmptyArrayZeroNativeItemsAreCreated = function () {
    helper.buildUIAndRunTest(_createListPicker(), function (views: Array<viewModule.View>) {
        var listPicker = <listPickerModule.ListPicker>views[0];
        listPicker.items = [];
        var expectedValue = listPicker.items.length;
        var actualValue = listPickerTestsNative.getNativeItemsCount(listPicker);
        TKUnit.assert(actualValue === expectedValue, "Actual: " + actualValue + "; Expected: " + expectedValue);
    });
};

export var testSelectedIndexBecomesZeroWhenItemsBoundToNonEmptyArray = function () {
    helper.buildUIAndRunTest(_createListPicker(), function (views: Array<viewModule.View>) {
        var listPicker = <listPickerModule.ListPicker>views[0];
        // >> article-binding-listpickeritems
        listPicker.items = [1, 2, 3];
        // << article-binding-listpickeritems
        var expectedValue = 0;
        var actualValue = listPicker.selectedIndex;
        TKUnit.assert(actualValue === expectedValue, "Actual: " + actualValue + "; Expected: " + expectedValue);
    });
};

export var testSelectedIndexBecomesUndefinedWhenItemsBoundToEmptyArray = function () {
    helper.buildUIAndRunTest(_createListPicker(), function (views: Array<viewModule.View>) {
        var listPicker = <listPickerModule.ListPicker>views[0];
        listPicker.items = _createItems(10);
        // >> article-selecting-item
        listPicker.selectedIndex = 9;
        // << article-selecting-item
        listPicker.items = [];
        var expectedValue = -1;
        var actualValue = listPicker.selectedIndex;
        TKUnit.assert(actualValue === expectedValue, "Actual: " + actualValue + "; Expected: " + expectedValue);
    });
};

export var testSelectedIndexBecomesUndefinedWhenItemsBoundToUndefined = function () {
    helper.buildUIAndRunTest(_createListPicker(), function (views: Array<viewModule.View>) {
        var listPicker = <listPickerModule.ListPicker>views[0];
        listPicker.items = _createItems(10);
        listPicker.selectedIndex = 9;
        listPicker.items = undefined;
        var expectedValue = -1;
        var actualValue = listPicker.selectedIndex;
        TKUnit.assert(actualValue === expectedValue, "Actual: " + actualValue + "; Expected: " + expectedValue);
    });
};

export var testSelectedIndexBecomesUndefinedWhenItemsBoundToNull = function () {
    helper.buildUIAndRunTest(_createListPicker(), function (views: Array<viewModule.View>) {
        var listPicker = <listPickerModule.ListPicker>views[0];
        listPicker.items = _createItems(10);
        listPicker.selectedIndex = 9;
        listPicker.items = null;
        var expectedValue = -1;
        var actualValue = listPicker.selectedIndex;
        TKUnit.assert(actualValue === expectedValue, "Actual: " + actualValue + "; Expected: " + expectedValue);
    });
};

export var testItemsIsResolvedCorrectlyIfSetBeforeViewIsLoaded = function () {
    var listPicker = _createListPicker();
    var expectedValue = 10;
    listPicker.items = _createItems(expectedValue);
    listPicker.selectedIndex = 9;
    helper.buildUIAndRunTest(listPicker, function (views: Array<viewModule.View>) {
        var listPicker = <listPickerModule.ListPicker>views[0];
        var actualValue = listPicker.items.length;
        TKUnit.assert(actualValue === expectedValue, "Actual: " + actualValue + "; Expected: " + expectedValue);
    });
};

export var testSelectedIndexIsResolvedCorrectlyIfSetBeforeViewIsLoaded = function () {
    var listPicker = _createListPicker();
    listPicker.items = _createItems(10);
    var expectedValue = 9;
    listPicker.selectedIndex = expectedValue;
    helper.buildUIAndRunTest(listPicker, function (views: Array<viewModule.View>) {
        var listPicker = <listPickerModule.ListPicker>views[0];
        var actualValue = listPicker.selectedIndex;
        TKUnit.assert(actualValue === expectedValue, "Actual: " + actualValue + "; Expected: " + expectedValue);
    });
};

// export var testSettingNegativeSelectedIndexShouldThrow = function () {
//     var listPicker = _createListPicker();
//     helper.buildUIAndRunTest(listPicker, function (views: Array<viewModule.View>) {
//         var listPicker = <listPickerModule.ListPicker>views[0];
//         listPicker.items = _createItems(10);

//         TKUnit.assertThrows(function () {
//             listPicker.selectedIndex = -1;
//         }, "Setting selectedIndex to a negative number should throw.");
//     });
// }

// export var testSettingSelectedIndexLargerThanCountShouldThrow = function () {
//     var listPicker = _createListPicker();
//     helper.buildUIAndRunTest(listPicker, function (views: Array<viewModule.View>) {
//         var listPicker = <listPickerModule.ListPicker>views[0];
//         listPicker.items = _createItems(10);
//         TKUnit.assertThrows(function () {
//             listPicker.selectedIndex = 10;
//         }, "Setting selectedIndex to a number larger than item count should throw.");
//     });
// }

export var testWhenSelectingAnItemNativelySelectedIndexIsUpdatedProperly = function () {
    let listPicker = _createListPicker();
    let mainPage = helper.getCurrentPage();
    listPicker.items = _createItems(2);
    mainPage.content = listPicker;

    let expectedValue = 1;
    listPickerTestsNative.selectNativeItem(listPicker, expectedValue);
    TKUnit.waitUntilReady(() => listPicker.selectedIndex === 1);

    let actualValue = listPicker.selectedIndex;
    TKUnit.assertEqual(actualValue, expectedValue);
};

export var test_Android_MaxValueIsOneLessThanItemsCount = function () {
    if (!application.android) {
        return;
    }

    helper.buildUIAndRunTest(_createListPicker(), function (views: Array<viewModule.View>) {
        var listPicker = <listPickerModule.ListPicker>views[0];
        listPicker.items = ["One", "Two", "Three"];
        var expectedValue = listPicker.items.length - 1;
        var actualValue = listPicker.nativeViewProtected.getMaxValue();
        TKUnit.assertEqual(actualValue, expectedValue);
    });
};

export var test_Android_WhenItemsAreEmptyNativeControlDoesNotShowZero = function () {
    if (!application.android) {
        return;
    }

    helper.buildUIAndRunTest(_createListPicker(), function (views: Array<viewModule.View>) {
        var listPicker = <listPickerModule.ListPicker>views[0];
        var expectedValue = " ";
        var actualValue = listPicker.nativeViewProtected.editText.getText().toString();
        TKUnit.assertEqual(actualValue, expectedValue);
    });
};

export var test_Android_WhenBoundToSingleElementArrayEditTextIsUpdatedProperly = function () {
    if (!application.android) {
        return;
    }

    helper.buildUIAndRunTest(_createListPicker(), function (views: Array<viewModule.View>) {
        var listPicker = <listPickerModule.ListPicker>views[0];
        listPicker.items = ["One"];
        var expectedValue = "One";
        var actualValue = listPicker.nativeViewProtected.editText.getText().toString();
        TKUnit.assertEqual(actualValue, expectedValue);
    });
};

export var test_Android_WhenSelectedIndexChangesEditTextIsUpdatedProperly = function () {
    if (!application.android) {
        return;
    }

    helper.buildUIAndRunTest(_createListPicker(), function (views: Array<viewModule.View>) {
        var listPicker = <listPickerModule.ListPicker>views[0];
        listPicker.items = ["One", "Two"];
        listPicker.selectedIndex = 1;
        var expectedValue = "Two";
        var actualValue = listPicker.nativeViewProtected.editText.getText().toString();
        TKUnit.assertEqual(actualValue, expectedValue);
    });
};