import * as TKUnit from "../../tk-unit";
import * as helper from "../../ui-helper";
import * as viewModule from "@nativescript/core/ui/core/view";
import { Label } from "@nativescript/core/ui/label";
import { StackLayout } from "@nativescript/core/ui/layouts/stack-layout";
import * as colorModule from "@nativescript/core/color";
import * as enums from "@nativescript/core/ui/enums";
import { AnimationPromise } from "@nativescript/core/ui/animation";

// >> animation-require
import * as animation from "@nativescript/core/ui/animation";
import { PercentLength } from "@nativescript/core/ui/styling/style-properties";
// << animation-require

function prepareTest(parentHeight?: number, parentWidth?: number): Label {
    let mainPage = helper.getCurrentPage();
    let label = new Label();
    label.text = "label";

    let stackLayout = new StackLayout();
    // optionally size the parent extent to make assertions about percentage values
    if (parentHeight !== undefined) {
        stackLayout.height = PercentLength.parse(parentHeight + "");
    }
    if (parentWidth !== undefined) {
        stackLayout.width = PercentLength.parse(parentWidth + "");
    }
    stackLayout.addChild(label);
    mainPage.content = stackLayout;
    TKUnit.waitUntilReady(() => label.isLoaded);

    return label;
}

export function test_AnimatingProperties(done) {
    let label = prepareTest();

    // >> animation-properties
    label.animate({
        opacity: 0.75,
        backgroundColor: new colorModule.Color("Red"),
        translate: { x: 100, y: 100 },
        scale: { x: 2, y: 2 },
        rotate: 180,
        duration: 5,
        delay: 10,
        iterations: 3,
        curve: enums.AnimationCurve.easeIn
    })
        .then(() => {
            //console.log("Animation finished.");
            // >> (hide)
            assertIOSNativeTransformIsCorrect(label);
            done();
            // << (hide)
        })
        .catch((e) => {
            console.log(e.message);
            // >> (hide)
            done(e);
            // << (hide)
        });
    // << animation-properties
}

export function test_PlayRejectsWhenAlreadyPlayingAnimation(done) {
    let label = prepareTest();

    var animation = label.createAnimation({ translate: { x: 100, y: 100 }, duration: 5 });

    animation.play();
    animation.play().then(() => {
        // should never get here
        throw new Error("Already playing.");
    }, (e) => {
        TKUnit.assert(animation.isPlaying === true, "animation.isPlaying should be true since it's currently playing.");
        if (e === "Animation is already playing.") {
            done();
        }
    });
}

export function test_CancelIgnoredWhenNotPlayingAnimation() {
    let label = prepareTest();

    var animation = label.createAnimation({ translate: { x: 100, y: 100 }, duration: 5 });
    animation.cancel(); // should not throw
    TKUnit.assert(!animation.isPlaying, "animation.isPlaying should be falsey since it was never played.");
}

export function test_CancellingAnimation(done) {
    let label = prepareTest();

    // >> animation-cancel
    var animation1 = label.createAnimation({ translate: { x: 100, y: 100 }, duration: 5 });

    animation1.play()
        .then(() => {
            //console.log("Animation finished");
            // >> (hide)
            throw new Error("Cancelling Animation - Should not be in the Promise Then()");
            // << (hide)
        })
        .catch((e) => {
            //console.log("Animation cancelled");
            // >> (hide)
            if (!e) {
                done(new Error("Cancel path did not have proper error"));
            } else if (e.toString() === "Error: Animation cancelled.") {
                done();
            } else {
                done(e);
            }
            // << (hide)
        });
    animation1.cancel();
    // << animation-cancel
}

export function test_CancellingAnimate(done) {
    let label = prepareTest();

    // >> animation-cancel2
    var animation1 = label.animate({ translate: { x: 100, y: 100 }, duration: 5 })
        .then(() => {
            //console.log("Animation finished");
            // >> (hide)
            throw new Error("Cancelling Animate - Should not be in Promise Then()");
            // << (hide)
        })
        .catch((e) => {
            //console.log("Animation cancelled");
            // >> (hide)
            if (!e) {
                done(new Error("Cancel path did not have proper error"));
            } else if (e.toString() === "Error: Animation cancelled.") {
                done();
            } else {
                done(e);
            }
            // << (hide)
        });
    (<AnimationPromise>animation1).cancel();
    // << animation-cancel2
}

export function test_ChainingAnimations(done) {
    let label = prepareTest();

    // >> animation-chaining
    let duration = 300;
    // >> (hide)
    duration = 5;
    // << (hide)
    label.animate({ opacity: 0, duration: duration })
        .then(() => label.animate({ opacity: 1, duration: duration }))
        .then(() => label.animate({ translate: { x: 200, y: 200 }, duration: duration }))
        .then(() => label.animate({ translate: { x: 0, y: 0 }, duration: duration }))
        .then(() => label.animate({ scale: { x: 5, y: 5 }, duration: duration }))
        .then(() => label.animate({ scale: { x: 1, y: 1 }, duration: duration }))
        .then(() => label.animate({ rotate: 180, duration: duration }))
        .then(() => label.animate({ rotate: 0, duration: duration }))
        .then(() => {
            //console.log("Animation finished");
            // >> (hide)
            assertIOSNativeTransformIsCorrect(label);
            done();
            // << (hide)
        })
        .catch((e) => {
            console.log(e.message);
            // >> (hide)
            done(e);
            // << (hide)
        });
    // << animation-chaining
}

export function test_ReusingAnimations(done) {
    let label = prepareTest();

    // >> animation-reusing
    var animation1 = label.createAnimation({ translate: { x: 100, y: 100 }, duration: 5 });
    var animation2 = label.createAnimation({ translate: { x: 0, y: 0 }, duration: 5 });

    animation1.play()
        .then(() => animation2.play())
        .then(() => animation1.play())
        .then(() => animation2.play())
        .then(() => animation1.play())
        .then(() => animation2.play())
        .then(() => {
            //console.log("Animation finished");
            // >> (hide)
            assertIOSNativeTransformIsCorrect(label);
            done();
            // << (hide)
        })
        .catch((e) => {
            console.log(e.message);
            // >> (hide)
            done(e);
            // << (hide)
        });
    // << animation-reusing
}

export function test_AnimatingMultipleViews(done) {
    let mainPage = helper.getCurrentPage();
    let label1 = new Label();
    label1.text = "label1";
    let label2 = new Label();
    label2.text = "label2";
    let label3 = new Label();
    label3.text = "label3";
    let stackLayout = new StackLayout();
    stackLayout.addChild(label1);
    stackLayout.addChild(label2);
    stackLayout.addChild(label3);
    mainPage.content = stackLayout;
    TKUnit.waitUntilReady(() => label3.isLoaded);

    // >> animation-multiple-views
    var animations: Array<animation.AnimationDefinition> = [
        { target: label1, translate: { x: 200, y: 200 }, duration: 5, delay: 0 },
        { target: label2, translate: { x: 200, y: 200 }, duration: 5, delay: 2 },
        { target: label3, translate: { x: 200, y: 200 }, duration: 5, delay: 4 },
    ];
    var a = new animation.Animation(animations);
    a.play()
        .then(() => {
            //console.log("Animations finished");
            // >> (hide)
            assertIOSNativeTransformIsCorrect(label1);
            assertIOSNativeTransformIsCorrect(label2);
            assertIOSNativeTransformIsCorrect(label3);
            done();
            // << (hide)
        })
        .catch((e) => {
            console.log(e.message);
            // >> (hide)
            done(e);
            // << (hide)
        });
    // << animation-multiple-views
}

export function test_AnimateOpacity(done) {
    let label = prepareTest();

    label.animate({ opacity: 0.75, duration: 5 })
        .then(() => {
            TKUnit.assertEqual(label.opacity, 0.75, "label.opacity");
            done();
        })
        .catch((e) => {
            done(e);
        });
}

export function test_AnimateOpacity_ShouldThrow_IfNotNumber() {
    var label = new Label();
    helper.buildUIAndRunTest(label, (views: Array<viewModule.View>) => {
        TKUnit.assertThrows(() => {
            label.animate({ opacity: <any>"0.75" });
        }, "Setting opacity to a non number should throw.");
    });
}

export function test_AnimateDelay_ShouldThrow_IfNotNumber() {
    var label = new Label();
    helper.buildUIAndRunTest(label, (views: Array<viewModule.View>) => {
        TKUnit.assertThrows(() => {
            label.animate({ delay: <any>"1" });
        }, "Setting delay to a non number should throw.");
    });
}

export function test_AnimateDuration_ShouldThrow_IfNotNumber() {
    var label = new Label();
    helper.buildUIAndRunTest(label, (views: Array<viewModule.View>) => {
        TKUnit.assertThrows(() => {
            label.animate({ duration: <any>"1" });
        }, "Setting duration to a non number should throw.");
    });
}

export function test_AnimateIterations_ShouldThrow_IfNotNumber() {
    var label = new Label();
    helper.buildUIAndRunTest(label, (views: Array<viewModule.View>) => {
        TKUnit.assertThrows(() => {
            label.animate({ iterations: <any>"1" });
        }, "Setting iterations to a non number should throw.");
    });
}

export function test_AnimateRotate_ShouldThrow_IfNotNumber() {
    var label = new Label();
    helper.buildUIAndRunTest(label, (views: Array<viewModule.View>) => {
        TKUnit.assertThrows(() => {
            label.animate({ rotate: <any>"1" });
        }, "Setting rotate to a non number should throw.");
    });
}

export function test_AnimateScale_ShouldThrow_IfNotPair() {
    var label = new Label();
    helper.buildUIAndRunTest(label, (views: Array<viewModule.View>) => {
        TKUnit.assertThrows(() => {
            label.animate({ scale: <any>"1" });
        }, "Setting scale to a non Pair should throw.");
    });
}

export function test_AnimateTranslate_ShouldThrow_IfNotPair() {
    var label = new Label();
    helper.buildUIAndRunTest(label, (views: Array<viewModule.View>) => {
        TKUnit.assertThrows(() => {
            label.animate({ translate: <any>"1" });
        }, "Setting translate to a non Pair should throw.");
    });
}

export function test_AnimateBackgroundColor_ShouldThrow_IfNotValidColorStringOrColor() {
    var label = new Label();
    helper.buildUIAndRunTest(label, (views: Array<viewModule.View>) => {
        TKUnit.assertThrows(() => {
            label.animate({ backgroundColor: <any>"test" });
        }, "Setting backgroundColor to a not valid color string or Color should throw.");
    });
}

export function test_AnimateBackgroundColor(done) {
    let label = prepareTest();
    var red = new colorModule.Color("Red");

    label.animate({ backgroundColor: red, duration: 5 })
        .then(() => {
            TKUnit.assert((<colorModule.Color>label.backgroundColor).equals(red));
            done();
        })
        .catch((e) => {
            done(e);
        });
}

export function test_AnimateBackgroundColor_FromString(done) {
    let label = prepareTest();
    var expected = "Red";
    var clr = new colorModule.Color(expected);

    label.animate({ backgroundColor: <any>expected, duration: 5 })
        .then(() => {
            TKUnit.assert((<colorModule.Color>label.backgroundColor).equals(clr));
            done();
        })
        .catch((e) => {
            done(e);
        });
}

export function test_AnimateTranslate(done) {
    let label = prepareTest();

    label.animate({ translate: { x: 100, y: 200 }, duration: 5 })
        .then(() => {
            TKUnit.assertEqual(label.translateX, 100, "label.translateX");
            TKUnit.assertEqual(label.translateY, 200, "label.translateY");
            assertIOSNativeTransformIsCorrect(label);
            done();
        })
        .catch((e) => {
            done(e);
        });
}

export function test_AnimateScale(done) {
    let label = prepareTest();

    label.animate({ scale: { x: 2, y: 3 }, duration: 5 })
        .then(() => {
            TKUnit.assertEqual(label.scaleX, 2, "label.scaleX");
            TKUnit.assertEqual(label.scaleY, 3, "label.scaleY");
            assertIOSNativeTransformIsCorrect(label);
            done();
        })
        .catch((e) => {
            done(e);
        });
}

export function test_AnimateRotate(done) {
    let label = prepareTest();

    label.animate({ rotate: 123, duration: 5 })
        .then(() => {
            TKUnit.assertEqual(label.rotate, 123, "label.rotate");
            assertIOSNativeTransformIsCorrect(label);
            done();
        })
        .catch((e) => {
            done(e);
        });
}

function animateExtentAndAssertExpected(along: "height" | "width", value: PercentLength, pixelExpected: PercentLength): Promise<void> {
    function pretty(val) {
        return JSON.stringify(val, null, 2);
    }
    const parentExtent = 200;
    const height = along === "height" ? parentExtent : undefined;
    const width = along === "height" ? undefined : parentExtent;
    const label = prepareTest(height, width);
    const props = {
        duration: 5,
        [along]: value
    };

    return label.animate(props).then(() => {
        const observedString: string = PercentLength.convertToString(label[along]);
        const inputString: string = PercentLength.convertToString(value);
        TKUnit.assertEqual(
            observedString,
            inputString,
            `PercentLength.convertToString(${pretty(value)}) should be "${inputString}" but is "${observedString}"`
        );
        // assert that the animated view"s calculated pixel extent matches the expected pixel value
        const observedNumber: number = PercentLength.toDevicePixels(label[along], parentExtent, parentExtent);
        const expectedNumber: number = PercentLength.toDevicePixels(pixelExpected, parentExtent, parentExtent);
        TKUnit.assertEqual(
            observedNumber,
            expectedNumber,
            `PercentLength.toDevicePixels(${inputString}) should be "${expectedNumber}" but is "${observedNumber}"`
        );

        assertIOSNativeTransformIsCorrect(label);
    });
}

export function test_AnimateExtent_Should_ResolvePercentageStrings(done) {
    let promise: Promise<any> = Promise.resolve();
    const pairs: [string, string][] = [
        ["100%", "200px"],
        ["50%", "100px"],
        ["25%", "50px"],
        ["-25%", "-50px"],
        ["-50%", "-100px"],
        ["-100%", "-200px"],
    ];
    pairs.forEach((pair) => {
        const input = PercentLength.parse(pair[0]);
        const expected = PercentLength.parse(pair[1]);
        promise = promise.then(() => {
            return animateExtentAndAssertExpected("height", input, expected);
        });
        promise = promise.then(() => {
            return animateExtentAndAssertExpected("width", input, expected);
        });
    });
    promise.then(() => done()).catch(done);
}

export function test_AnimateExtent_Should_AcceptStringPixelValues(done) {
    let promise: Promise<any> = Promise.resolve();
    const pairs: [string, number][] = [
        ["100px", 100],
        ["50px", 50]
    ];
    pairs.forEach((pair) => {
        const input = PercentLength.parse(pair[0]);
        const expected = {
            unit: "px",
            value: pair[1]
        } as PercentLength;
        promise = promise.then(() => {
            return animateExtentAndAssertExpected("height", input, expected);
        });
        promise = promise.then(() => {
            return animateExtentAndAssertExpected("width", input, expected);
        });
    });
    promise.then(() => done()).catch(done);
}

export function test_AnimateExtent_Should_AcceptNumberValuesAsDip(done) {
    let promise: Promise<any> = Promise.resolve();
    const inputs: any[] = [200, 150, 100, 50, 0];
    inputs.forEach((value) => {
        const parsed = PercentLength.parse(value);
        promise = promise.then(() => {
            return animateExtentAndAssertExpected("height", parsed, parsed);
        });
        promise = promise.then(() => {
            return animateExtentAndAssertExpected("width", parsed, parsed);
        });
    });
    promise.then(() => done()).catch(done);
}

export function test_AnimateExtent_Should_ThrowIfCannotParsePercentLength() {
    const label = new Label();
    helper.buildUIAndRunTest(label, (views: Array<viewModule.View>) => {
        TKUnit.assertThrows(() => {
            label.animate({ width: "-frog%" });
        }, "Invalid percent string should throw");
        TKUnit.assertThrows(() => {
            label.animate({ height: "-frog%" });
        }, "Invalid percent string should throw");
    });
}

export function test_AnimateTranslateScaleAndRotateSimultaneously(done) {
    let label = prepareTest();

    label.animate({
        translate: { x: 100, y: 200 },
        scale: { x: 2, y: 3 },
        rotate: 123,
        duration: 5
    })
        .then(() => {
            TKUnit.assertEqual(label.translateX, 100, "label.translateX");
            TKUnit.assertEqual(label.translateY, 200, "label.translateY");
            TKUnit.assertEqual(label.scaleX, 2, "label.scaleX");
            TKUnit.assertEqual(label.scaleY, 3, "label.scaleY");
            TKUnit.assertEqual(label.rotate, 123, "label.rotate");
            assertIOSNativeTransformIsCorrect(label);
            done();
        })
        .catch((e) => {
            done(e);
        });
}

export function test_AnimateTranslateScaleAndRotateSequentially(done) {
    let label = prepareTest();

    label.animate({ translate: { x: 100, y: 200 }, duration: 5 })
        .then(() => {
            TKUnit.assertEqual(label.translateX, 100, "label.translateX");
            TKUnit.assertEqual(label.translateY, 200, "label.translateY");
            assertIOSNativeTransformIsCorrect(label);

            return label.animate({ scale: { x: 2, y: 3 }, duration: 5 });
        })
        .then(() => {
            TKUnit.assertEqual(label.translateX, 100, "label.translateX");
            TKUnit.assertEqual(label.translateY, 200, "label.translateY");
            TKUnit.assertEqual(label.scaleX, 2, "label.scaleX");
            TKUnit.assertEqual(label.scaleY, 3, "label.scaleY");
            assertIOSNativeTransformIsCorrect(label);

            return label.animate({ rotate: 123, duration: 5 });
        })
        .then(() => {
            TKUnit.assertEqual(label.translateX, 100, "label.translateX");
            TKUnit.assertEqual(label.translateY, 200, "label.translateY");
            TKUnit.assertEqual(label.scaleX, 2, "label.scaleX");
            TKUnit.assertEqual(label.scaleY, 3, "label.scaleY");
            TKUnit.assertEqual(label.rotate, 123, "label.rotate");
            assertIOSNativeTransformIsCorrect(label);
            done();
        })
        .catch((e) => {
            done(e);
        });
}

export function test_AnimationsAreAlwaysPlayed(done) {
    let label = prepareTest();

    var animation1 = label.createAnimation({ opacity: 0, duration: 5 });
    var animation2 = label.createAnimation({ opacity: 1, duration: 5 });

    animation1.play()
        .then(() => {
            TKUnit.assert(label.opacity === 0, `Label opacity should be 0 after first animation, actual value is ${label.opacity}.`);

            return animation2.play();
        })
        .then(() => {
            TKUnit.assert(label.opacity === 1, `Label opacity should be 1 after second animation, actual value is ${label.opacity}.`);
            done();
        })
        .catch((e) => {
            console.log(e.message);
            done(e);
        });
}

export function test_PlayPromiseIsResolvedWhenAnimationFinishes(done) {
    let label = prepareTest();

    var animation = label.createAnimation({ opacity: 0, duration: 5 });

    animation.play()
        .then(function onResolved() {
            TKUnit.assert(animation.isPlaying === false, "Animation.isPlaying should be false when animation play promise is resolved.");
            done();
        }, function onRejected(e) {
            TKUnit.assert(false, "Animation play promise should be resolved, not rejected.");
            done(e);
        });
}

export function test_PlayPromiseIsRejectedWhenAnimationIsCancelled(done) {
    let label = prepareTest();

    var animation = label.createAnimation({ opacity: 0, duration: 5 });

    animation.play()
        .then(function onResolved() {
            TKUnit.assert(false, "Animation play promise should be rejected, not resolved.");
            done();
        }, function onRejected(e) {
            TKUnit.assert(animation.isPlaying === false, "Animation.isPlaying should be false when animation play promise is rejected.");
            done();
        });

    animation.cancel();
}

function assertIOSNativeTransformIsCorrect(view: viewModule.View) {
    if (view.ios) {
        var errorMessage = (<any>animation)._getTransformMismatchErrorMessage(view);
        if (errorMessage) {
            TKUnit.assert(false, errorMessage);
        }
    }
}