/*
 * Copyright (C) 2010 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
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 *
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 * notice, this list of conditions and the following disclaimer.
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 * in the documentation and/or other materials provided with the
 * distribution.
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 * 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
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#include "config.h"
#include "core/html/TimeInputType.h"

#include "HTMLNames.h"
#include "core/html/HTMLInputElement.h"
#include "core/html/InputTypeNames.h"
#include "core/platform/DateComponents.h"
#include "wtf/CurrentTime.h"
#include "wtf/DateMath.h"
#include "wtf/MathExtras.h"
#include "wtf/PassOwnPtr.h"

#if ENABLE(INPUT_MULTIPLE_FIELDS_UI)
#include "core/html/DateTimeFieldsState.h"
#include "core/platform/text/PlatformLocale.h"
#include "wtf/text/WTFString.h"
#endif

namespace WebCore {

using namespace HTMLNames;

static const int timeDefaultStep = 60;
static const int timeDefaultStepBase = 0;
static const int timeStepScaleFactor = 1000;

TimeInputType::TimeInputType(HTMLInputElement*  element)
    : BaseTimeInputType(element)
{
}

PassOwnPtr<InputType> TimeInputType::create(HTMLInputElement* element)
{
    return adoptPtr(new TimeInputType(element));
}

void TimeInputType::countUsage()
{
    observeFeatureIfVisible(UseCounter::InputTypeTime);
}

const AtomicString& TimeInputType::formControlType() const
{
    return InputTypeNames::time();
}

DateComponents::Type TimeInputType::dateType() const
{
    return DateComponents::Time;
}

Decimal TimeInputType::defaultValueForStepUp() const
{
    double current = currentTimeMS();
    double utcOffset = calculateUTCOffset();
    double dstOffset = calculateDSTOffset(current, utcOffset);
    int offset = static_cast<int>((utcOffset + dstOffset) / msPerMinute);
    current += offset * msPerMinute;

    DateComponents date;
    date.setMillisecondsSinceMidnight(current);
    double milliseconds = date.millisecondsSinceEpoch();
    ASSERT(std::isfinite(milliseconds));
    return Decimal::fromDouble(milliseconds);
}

StepRange TimeInputType::createStepRange(AnyStepHandling anyStepHandling) const
{
    DEFINE_STATIC_LOCAL(const StepRange::StepDescription, stepDescription, (timeDefaultStep, timeDefaultStepBase, timeStepScaleFactor, StepRange::ScaledStepValueShouldBeInteger));

    const Decimal stepBase = parseToNumber(element()->fastGetAttribute(minAttr), 0);
    const Decimal minimum = parseToNumber(element()->fastGetAttribute(minAttr), Decimal::fromDouble(DateComponents::minimumTime()));
    const Decimal maximum = parseToNumber(element()->fastGetAttribute(maxAttr), Decimal::fromDouble(DateComponents::maximumTime()));
    const Decimal step = StepRange::parseStep(anyStepHandling, stepDescription, element()->fastGetAttribute(stepAttr));
    return StepRange(stepBase, minimum, maximum, step, stepDescription);
}

bool TimeInputType::parseToDateComponentsInternal(const String& string, DateComponents* out) const
{
    ASSERT(out);
    unsigned end;
    return out->parseTime(string, 0, end) && end == string.length();
}

bool TimeInputType::setMillisecondToDateComponents(double value, DateComponents* date) const
{
    ASSERT(date);
    return date->setMillisecondsSinceMidnight(value);
}

bool TimeInputType::isTimeField() const
{
    return true;
}

#if ENABLE(INPUT_MULTIPLE_FIELDS_UI)

String TimeInputType::localizeValue(const String& proposedValue) const
{
    DateComponents date;
    if (!parseToDateComponents(proposedValue, &date))
        return proposedValue;

    Locale::FormatType formatType = shouldHaveSecondField(date) ? Locale::FormatTypeMedium : Locale::FormatTypeShort;

    String localized = element()->locale().formatDateTime(date, formatType);
    return localized.isEmpty() ? proposedValue : localized;
}

String TimeInputType::formatDateTimeFieldsState(const DateTimeFieldsState& dateTimeFieldsState) const
{
    if (!dateTimeFieldsState.hasHour() || !dateTimeFieldsState.hasMinute() || !dateTimeFieldsState.hasAMPM())
        return emptyString();
    if (dateTimeFieldsState.hasMillisecond() && dateTimeFieldsState.millisecond())
        return String::format("%02u:%02u:%02u.%03u",
                dateTimeFieldsState.hour23(),
                dateTimeFieldsState.minute(),
                dateTimeFieldsState.hasSecond() ? dateTimeFieldsState.second() : 0,
                dateTimeFieldsState.millisecond());
    if (dateTimeFieldsState.hasSecond() && dateTimeFieldsState.second())
        return String::format("%02u:%02u:%02u",
                dateTimeFieldsState.hour23(),
                dateTimeFieldsState.minute(),
                dateTimeFieldsState.second());
    return String::format("%02u:%02u", dateTimeFieldsState.hour23(), dateTimeFieldsState.minute());
}

void TimeInputType::setupLayoutParameters(DateTimeEditElement::LayoutParameters& layoutParameters, const DateComponents& date) const
{
    if (shouldHaveSecondField(date)) {
        layoutParameters.dateTimeFormat = layoutParameters.locale.timeFormat();
        layoutParameters.fallbackDateTimeFormat = "HH:mm:ss";
    } else {
        layoutParameters.dateTimeFormat = layoutParameters.locale.shortTimeFormat();
        layoutParameters.fallbackDateTimeFormat = "HH:mm";
    }
    if (!parseToDateComponents(element()->fastGetAttribute(minAttr), &layoutParameters.minimum))
        layoutParameters.minimum = DateComponents();
    if (!parseToDateComponents(element()->fastGetAttribute(maxAttr), &layoutParameters.maximum))
        layoutParameters.maximum = DateComponents();
}

bool TimeInputType::isValidFormat(bool hasYear, bool hasMonth, bool hasWeek, bool hasDay, bool hasAMPM, bool hasHour, bool hasMinute, bool hasSecond) const
{
    return hasHour && hasMinute && hasAMPM;
}
#endif

} // namespace WebCore