/*
 * Copyright (c) 2013, Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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 */

#include "config.h"
#include "core/animation/AnimatableNumber.h"

#include "core/css/CSSCalculationValue.h"
#include "core/css/CSSPrimitiveValue.h"
#include "core/platform/CalculationValue.h"
#include "wtf/MathExtras.h"

#include <gtest/gtest.h>

using namespace WebCore;

namespace {

class AnimatableNumberTest : public ::testing::Test {
protected:
    virtual void SetUp()
    {
    }

    PassRefPtr<AnimatableNumber> create(double value)
    {
        return create(value, CSSPrimitiveValue::CSS_NUMBER);
    }

    PassRefPtr<AnimatableNumber> create(double value, CSSPrimitiveValue::UnitTypes type)
    {
        return AnimatableNumber::create(CSSPrimitiveValue::create(value, type).get());
    }

    PassRefPtr<CSSCalcValue> createCalc(double valueLeft, CSSPrimitiveValue::UnitTypes typeLeft, double valueRight, CSSPrimitiveValue::UnitTypes typeRight)
    {
        return CSSCalcValue::create(CSSCalcValue::createExpressionNode(
            CSSCalcValue::createExpressionNode(CSSPrimitiveValue::create(valueLeft, typeLeft), valueLeft == trunc(valueLeft)),
            CSSCalcValue::createExpressionNode(CSSPrimitiveValue::create(valueRight, typeRight), valueRight == trunc(valueRight)),
            CalcAdd
        ));
    }

    bool testToCSSValue(CSSValue* cssValue)
    {
        return testToCSSValue(cssValue, cssValue);
    }
    bool testToCSSValue(CSSValue* cssValueExpected, CSSValue* cssValue)
    {
        return AnimatableNumber::create(cssValue)->toCSSValue()->equals(*cssValueExpected);
    }
    bool testInterpolate(CSSValue* cssValueExpected, AnimatableNumber* numberA, AnimatableNumber* numberB, double fraction)
    {
        return toAnimatableNumber(AnimatableValue::interpolate(numberA, numberB, fraction).get())->toCSSValue()->equals(*cssValueExpected);
    }
    bool testAdd(CSSValue* cssValueExpected, AnimatableNumber* numberA, AnimatableNumber* numberB)
    {
        return toAnimatableNumber(AnimatableValue::add(numberA, numberB).get())->toCSSValue()->equals(*cssValueExpected);
    }
};

TEST_F(AnimatableNumberTest, CanCreateFrom)
{
    EXPECT_TRUE(AnimatableNumber::canCreateFrom(CSSPrimitiveValue::create(5, CSSPrimitiveValue::CSS_NUMBER).get()));
    EXPECT_TRUE(AnimatableNumber::canCreateFrom(CSSPrimitiveValue::create(5, CSSPrimitiveValue::CSS_PX).get()));
    EXPECT_TRUE(AnimatableNumber::canCreateFrom(CSSPrimitiveValue::create(5, CSSPrimitiveValue::CSS_CM).get()));
    EXPECT_TRUE(AnimatableNumber::canCreateFrom(CSSPrimitiveValue::create(5, CSSPrimitiveValue::CSS_MM).get()));
    EXPECT_TRUE(AnimatableNumber::canCreateFrom(CSSPrimitiveValue::create(5, CSSPrimitiveValue::CSS_IN).get()));
    EXPECT_TRUE(AnimatableNumber::canCreateFrom(CSSPrimitiveValue::create(5, CSSPrimitiveValue::CSS_PT).get()));
    EXPECT_TRUE(AnimatableNumber::canCreateFrom(CSSPrimitiveValue::create(5, CSSPrimitiveValue::CSS_PC).get()));
    EXPECT_TRUE(AnimatableNumber::canCreateFrom(CSSPrimitiveValue::create(5, CSSPrimitiveValue::CSS_EMS).get()));
    EXPECT_TRUE(AnimatableNumber::canCreateFrom(CSSPrimitiveValue::create(5, CSSPrimitiveValue::CSS_EXS).get()));
    EXPECT_TRUE(AnimatableNumber::canCreateFrom(CSSPrimitiveValue::create(5, CSSPrimitiveValue::CSS_REMS).get()));
    EXPECT_TRUE(AnimatableNumber::canCreateFrom(CSSPrimitiveValue::create(5, CSSPrimitiveValue::CSS_DEG).get()));
    EXPECT_TRUE(AnimatableNumber::canCreateFrom(CSSPrimitiveValue::create(5, CSSPrimitiveValue::CSS_RAD).get()));
    EXPECT_TRUE(AnimatableNumber::canCreateFrom(CSSPrimitiveValue::create(5, CSSPrimitiveValue::CSS_GRAD).get()));
    EXPECT_TRUE(AnimatableNumber::canCreateFrom(CSSPrimitiveValue::create(5, CSSPrimitiveValue::CSS_TURN).get()));
    EXPECT_TRUE(AnimatableNumber::canCreateFrom(CSSPrimitiveValue::create(5, CSSPrimitiveValue::CSS_PERCENTAGE).get()));
    EXPECT_TRUE(AnimatableNumber::canCreateFrom(CSSPrimitiveValue::create(5, CSSPrimitiveValue::CSS_VW).get()));
    EXPECT_TRUE(AnimatableNumber::canCreateFrom(CSSPrimitiveValue::create(5, CSSPrimitiveValue::CSS_VH).get()));
    EXPECT_TRUE(AnimatableNumber::canCreateFrom(CSSPrimitiveValue::create(5, CSSPrimitiveValue::CSS_VMIN).get()));
    EXPECT_TRUE(AnimatableNumber::canCreateFrom(CSSPrimitiveValue::create(5, CSSPrimitiveValue::CSS_VMAX).get()));
    EXPECT_TRUE(AnimatableNumber::canCreateFrom(CSSPrimitiveValue::create(5, CSSPrimitiveValue::CSS_MS).get()));
    EXPECT_TRUE(AnimatableNumber::canCreateFrom(CSSPrimitiveValue::create(5, CSSPrimitiveValue::CSS_S).get()));
    EXPECT_TRUE(AnimatableNumber::canCreateFrom(CSSPrimitiveValue::create(5, CSSPrimitiveValue::CSS_HZ).get()));
    EXPECT_TRUE(AnimatableNumber::canCreateFrom(CSSPrimitiveValue::create(5, CSSPrimitiveValue::CSS_KHZ).get()));
    EXPECT_TRUE(AnimatableNumber::canCreateFrom(CSSPrimitiveValue::create(5, CSSPrimitiveValue::CSS_DPPX).get()));
    EXPECT_TRUE(AnimatableNumber::canCreateFrom(CSSPrimitiveValue::create(5, CSSPrimitiveValue::CSS_DPI).get()));
    EXPECT_TRUE(AnimatableNumber::canCreateFrom(CSSPrimitiveValue::create(5, CSSPrimitiveValue::CSS_DPCM).get()));

    EXPECT_TRUE(AnimatableNumber::canCreateFrom(createCalc(3, CSSPrimitiveValue::CSS_PX, 5, CSSPrimitiveValue::CSS_CM).get()));
    EXPECT_TRUE(AnimatableNumber::canCreateFrom(CSSPrimitiveValue::create(createCalc(3, CSSPrimitiveValue::CSS_PX, 5, CSSPrimitiveValue::CSS_CM)).get()));

    EXPECT_FALSE(AnimatableNumber::canCreateFrom(CSSPrimitiveValue::create("NaN", CSSPrimitiveValue::CSS_STRING).get()));
}

TEST_F(AnimatableNumberTest, Create)
{
    EXPECT_TRUE(static_cast<bool>(create(5, CSSPrimitiveValue::CSS_NUMBER).get()));
    EXPECT_TRUE(static_cast<bool>(create(5, CSSPrimitiveValue::CSS_PX).get()));
    EXPECT_TRUE(static_cast<bool>(create(5, CSSPrimitiveValue::CSS_CM).get()));
    EXPECT_TRUE(static_cast<bool>(create(5, CSSPrimitiveValue::CSS_MM).get()));
    EXPECT_TRUE(static_cast<bool>(create(5, CSSPrimitiveValue::CSS_IN).get()));
    EXPECT_TRUE(static_cast<bool>(create(5, CSSPrimitiveValue::CSS_PT).get()));
    EXPECT_TRUE(static_cast<bool>(create(5, CSSPrimitiveValue::CSS_PC).get()));
    EXPECT_TRUE(static_cast<bool>(create(5, CSSPrimitiveValue::CSS_EMS).get()));
    EXPECT_TRUE(static_cast<bool>(create(5, CSSPrimitiveValue::CSS_EXS).get()));
    EXPECT_TRUE(static_cast<bool>(create(5, CSSPrimitiveValue::CSS_REMS).get()));
    EXPECT_TRUE(static_cast<bool>(create(5, CSSPrimitiveValue::CSS_DEG).get()));
    EXPECT_TRUE(static_cast<bool>(create(5, CSSPrimitiveValue::CSS_RAD).get()));
    EXPECT_TRUE(static_cast<bool>(create(5, CSSPrimitiveValue::CSS_GRAD).get()));
    EXPECT_TRUE(static_cast<bool>(create(5, CSSPrimitiveValue::CSS_TURN).get()));
    EXPECT_TRUE(static_cast<bool>(create(5, CSSPrimitiveValue::CSS_PERCENTAGE).get()));
    EXPECT_TRUE(static_cast<bool>(create(5, CSSPrimitiveValue::CSS_VW).get()));
    EXPECT_TRUE(static_cast<bool>(create(5, CSSPrimitiveValue::CSS_VH).get()));
    EXPECT_TRUE(static_cast<bool>(create(5, CSSPrimitiveValue::CSS_VMIN).get()));
    EXPECT_TRUE(static_cast<bool>(create(5, CSSPrimitiveValue::CSS_VMAX).get()));
    EXPECT_TRUE(static_cast<bool>(create(5, CSSPrimitiveValue::CSS_MS).get()));
    EXPECT_TRUE(static_cast<bool>(create(5, CSSPrimitiveValue::CSS_S).get()));
    EXPECT_TRUE(static_cast<bool>(create(5, CSSPrimitiveValue::CSS_HZ).get()));
    EXPECT_TRUE(static_cast<bool>(create(5, CSSPrimitiveValue::CSS_KHZ).get()));
    EXPECT_TRUE(static_cast<bool>(create(5, CSSPrimitiveValue::CSS_DPPX).get()));
    EXPECT_TRUE(static_cast<bool>(create(5, CSSPrimitiveValue::CSS_DPI).get()));
    EXPECT_TRUE(static_cast<bool>(create(5, CSSPrimitiveValue::CSS_DPCM).get()));

    EXPECT_TRUE(static_cast<bool>(
        AnimatableNumber::create(createCalc(3, CSSPrimitiveValue::CSS_PX, 5, CSSPrimitiveValue::CSS_CM).get()).get()
    ));
    EXPECT_TRUE(static_cast<bool>(
        AnimatableNumber::create(CSSPrimitiveValue::create(createCalc(3, CSSPrimitiveValue::CSS_PX, 5, CSSPrimitiveValue::CSS_CM)).get()).get()
    ));
}

TEST_F(AnimatableNumberTest, ToCSSValue)
{
    EXPECT_TRUE(testToCSSValue(CSSPrimitiveValue::create(-5, CSSPrimitiveValue::CSS_NUMBER).get()));
    EXPECT_TRUE(testToCSSValue(CSSPrimitiveValue::create(-5, CSSPrimitiveValue::CSS_PX).get()));
    EXPECT_TRUE(testToCSSValue(CSSPrimitiveValue::create(-5, CSSPrimitiveValue::CSS_CM).get()));
    EXPECT_TRUE(testToCSSValue(CSSPrimitiveValue::create(-5, CSSPrimitiveValue::CSS_MM).get()));
    EXPECT_TRUE(testToCSSValue(CSSPrimitiveValue::create(-5, CSSPrimitiveValue::CSS_IN).get()));
    EXPECT_TRUE(testToCSSValue(CSSPrimitiveValue::create(-5, CSSPrimitiveValue::CSS_PT).get()));
    EXPECT_TRUE(testToCSSValue(CSSPrimitiveValue::create(-5, CSSPrimitiveValue::CSS_PC).get()));
    EXPECT_TRUE(testToCSSValue(CSSPrimitiveValue::create(-5, CSSPrimitiveValue::CSS_EMS).get()));
    EXPECT_TRUE(testToCSSValue(CSSPrimitiveValue::create(-5, CSSPrimitiveValue::CSS_EXS).get()));
    EXPECT_TRUE(testToCSSValue(CSSPrimitiveValue::create(-5, CSSPrimitiveValue::CSS_REMS).get()));
    EXPECT_TRUE(testToCSSValue(CSSPrimitiveValue::create(-5, CSSPrimitiveValue::CSS_DEG).get()));
    EXPECT_TRUE(testToCSSValue(CSSPrimitiveValue::create(-5, CSSPrimitiveValue::CSS_RAD).get()));
    EXPECT_TRUE(testToCSSValue(CSSPrimitiveValue::create(-5, CSSPrimitiveValue::CSS_GRAD).get()));
    EXPECT_TRUE(testToCSSValue(CSSPrimitiveValue::create(-5, CSSPrimitiveValue::CSS_TURN).get()));
    EXPECT_TRUE(testToCSSValue(CSSPrimitiveValue::create(-5, CSSPrimitiveValue::CSS_PERCENTAGE).get()));
    EXPECT_TRUE(testToCSSValue(CSSPrimitiveValue::create(-5, CSSPrimitiveValue::CSS_VW).get()));
    EXPECT_TRUE(testToCSSValue(CSSPrimitiveValue::create(-5, CSSPrimitiveValue::CSS_VH).get()));
    EXPECT_TRUE(testToCSSValue(CSSPrimitiveValue::create(-5, CSSPrimitiveValue::CSS_VMIN).get()));
    EXPECT_TRUE(testToCSSValue(CSSPrimitiveValue::create(-5, CSSPrimitiveValue::CSS_VMAX).get()));
    EXPECT_TRUE(testToCSSValue(CSSPrimitiveValue::create(-5, CSSPrimitiveValue::CSS_MS).get()));
    EXPECT_TRUE(testToCSSValue(CSSPrimitiveValue::create(-5, CSSPrimitiveValue::CSS_S).get()));
    EXPECT_TRUE(testToCSSValue(CSSPrimitiveValue::create(-5, CSSPrimitiveValue::CSS_HZ).get()));
    EXPECT_TRUE(testToCSSValue(CSSPrimitiveValue::create(-5, CSSPrimitiveValue::CSS_KHZ).get()));
    EXPECT_TRUE(testToCSSValue(CSSPrimitiveValue::create(-5, CSSPrimitiveValue::CSS_DPPX).get()));
    EXPECT_TRUE(testToCSSValue(CSSPrimitiveValue::create(-5, CSSPrimitiveValue::CSS_DPI).get()));
    EXPECT_TRUE(testToCSSValue(CSSPrimitiveValue::create(-5, CSSPrimitiveValue::CSS_DPCM).get()));

    EXPECT_TRUE(testToCSSValue(CSSPrimitiveValue::create(createCalc(3, CSSPrimitiveValue::CSS_PX, 5, CSSPrimitiveValue::CSS_IN)).get()));
    EXPECT_TRUE(testToCSSValue(CSSPrimitiveValue::create(createCalc(3, CSSPrimitiveValue::CSS_PX, 5, CSSPrimitiveValue::CSS_IN)).get(),
        createCalc(3, CSSPrimitiveValue::CSS_PX, 5, CSSPrimitiveValue::CSS_IN).get()));
}

TEST_F(AnimatableNumberTest, Interpolate)
{
    RefPtr<AnimatableNumber> from10 = create(10);
    RefPtr<AnimatableNumber> to20 = create(20);
    EXPECT_TRUE(testInterpolate(CSSPrimitiveValue::create(5,  CSSPrimitiveValue::CSS_NUMBER).get(), from10.get(), to20.get(), -0.5));
    EXPECT_TRUE(testInterpolate(CSSPrimitiveValue::create(10, CSSPrimitiveValue::CSS_NUMBER).get(), from10.get(), to20.get(),  0));
    EXPECT_TRUE(testInterpolate(CSSPrimitiveValue::create(14, CSSPrimitiveValue::CSS_NUMBER).get(), from10.get(), to20.get(),  0.4));
    EXPECT_TRUE(testInterpolate(CSSPrimitiveValue::create(15, CSSPrimitiveValue::CSS_NUMBER).get(), from10.get(), to20.get(),  0.5));
    EXPECT_TRUE(testInterpolate(CSSPrimitiveValue::create(16, CSSPrimitiveValue::CSS_NUMBER).get(), from10.get(), to20.get(),  0.6));
    EXPECT_TRUE(testInterpolate(CSSPrimitiveValue::create(20, CSSPrimitiveValue::CSS_NUMBER).get(), from10.get(), to20.get(),  1));
    EXPECT_TRUE(testInterpolate(CSSPrimitiveValue::create(25, CSSPrimitiveValue::CSS_NUMBER).get(), from10.get(), to20.get(),  1.5));

    RefPtr<AnimatableNumber> from10px = create(10, CSSPrimitiveValue::CSS_PX);
    RefPtr<AnimatableNumber> to20pxAsInches = create(20.0 / 96, CSSPrimitiveValue::CSS_IN);
    EXPECT_TRUE(testInterpolate(CSSPrimitiveValue::create(5,  CSSPrimitiveValue::CSS_PX).get(), from10px.get(), to20pxAsInches.get(), -0.5));
    EXPECT_TRUE(testInterpolate(CSSPrimitiveValue::create(10, CSSPrimitiveValue::CSS_PX).get(), from10px.get(), to20pxAsInches.get(),  0));
    EXPECT_TRUE(testInterpolate(CSSPrimitiveValue::create(14, CSSPrimitiveValue::CSS_PX).get(), from10px.get(), to20pxAsInches.get(),  0.4));
    EXPECT_TRUE(testInterpolate(CSSPrimitiveValue::create(15, CSSPrimitiveValue::CSS_PX).get(), from10px.get(), to20pxAsInches.get(),  0.5));
    EXPECT_TRUE(testInterpolate(CSSPrimitiveValue::create(16, CSSPrimitiveValue::CSS_PX).get(), from10px.get(), to20pxAsInches.get(),  0.6));
    EXPECT_TRUE(testInterpolate(CSSPrimitiveValue::create(20.0 / 96, CSSPrimitiveValue::CSS_IN).get(), from10px.get(), to20pxAsInches.get(),  1));
    EXPECT_TRUE(testInterpolate(CSSPrimitiveValue::create(25, CSSPrimitiveValue::CSS_PX).get(), from10px.get(), to20pxAsInches.get(),  1.5));

    RefPtr<AnimatableNumber> from10em = create(10, CSSPrimitiveValue::CSS_EMS);
    RefPtr<AnimatableNumber> to20rem = create(20, CSSPrimitiveValue::CSS_REMS);
    EXPECT_TRUE(testInterpolate(CSSPrimitiveValue::create(createCalc(15, CSSPrimitiveValue::CSS_EMS, -10, CSSPrimitiveValue::CSS_REMS)).get(),
        from10em.get(), to20rem.get(), -0.5));
    EXPECT_TRUE(testInterpolate(CSSPrimitiveValue::create(10, CSSPrimitiveValue::CSS_EMS).get(),
        from10em.get(), to20rem.get(),  0));
    EXPECT_TRUE(testInterpolate(CSSPrimitiveValue::create(createCalc(6, CSSPrimitiveValue::CSS_EMS, 8, CSSPrimitiveValue::CSS_REMS)).get(),
        from10em.get(), to20rem.get(),  0.4));
    EXPECT_TRUE(testInterpolate(CSSPrimitiveValue::create(createCalc(5, CSSPrimitiveValue::CSS_EMS, 10, CSSPrimitiveValue::CSS_REMS)).get(),
        from10em.get(), to20rem.get(),  0.5));
    EXPECT_TRUE(testInterpolate(CSSPrimitiveValue::create(createCalc(4, CSSPrimitiveValue::CSS_EMS, 12, CSSPrimitiveValue::CSS_REMS)).get(),
        from10em.get(), to20rem.get(),  0.6));
    EXPECT_TRUE(testInterpolate(CSSPrimitiveValue::create(20, CSSPrimitiveValue::CSS_REMS).get(),
        from10em.get(), to20rem.get(),  1));
    EXPECT_TRUE(testInterpolate(CSSPrimitiveValue::create(createCalc(-5, CSSPrimitiveValue::CSS_EMS, 30, CSSPrimitiveValue::CSS_REMS)).get(),
        from10em.get(), to20rem.get(),  1.5));
}

TEST_F(AnimatableNumberTest, Add)
{
    EXPECT_TRUE(testAdd(CSSPrimitiveValue::create(10, CSSPrimitiveValue::CSS_NUMBER).get(), create(4).get(), create(6).get()));
    EXPECT_TRUE(testAdd(CSSPrimitiveValue::create(10, CSSPrimitiveValue::CSS_NUMBER).get(), create(0).get(), create(10).get()));
    EXPECT_TRUE(testAdd(CSSPrimitiveValue::create(10, CSSPrimitiveValue::CSS_PX).get(), create(10, CSSPrimitiveValue::CSS_PX).get(), create(0, CSSPrimitiveValue::CSS_MM).get()));
    EXPECT_TRUE(testAdd(CSSPrimitiveValue::create(100, CSSPrimitiveValue::CSS_PX).get(), create(4, CSSPrimitiveValue::CSS_PX).get(), create(1, CSSPrimitiveValue::CSS_IN).get()));
    EXPECT_TRUE(testAdd(
        CSSPrimitiveValue::create(createCalc(10, CSSPrimitiveValue::CSS_EMS, 20, CSSPrimitiveValue::CSS_REMS)).get(),
        create(10, CSSPrimitiveValue::CSS_EMS).get(),
        create(20, CSSPrimitiveValue::CSS_REMS).get()));
    EXPECT_TRUE(testAdd(
        CSSPrimitiveValue::create(10, CSSPrimitiveValue::CSS_EMS).get(),
        create(10, CSSPrimitiveValue::CSS_EMS).get(),
        create(0, CSSPrimitiveValue::CSS_REMS).get()));
    EXPECT_TRUE(testAdd(
        CSSPrimitiveValue::create(20, CSSPrimitiveValue::CSS_REMS).get(),
        create(0, CSSPrimitiveValue::CSS_EMS).get(),
        create(20, CSSPrimitiveValue::CSS_REMS).get()));
}

}