/*
 * Copyright (c) 2022-2023, Sam Atkins <atkinssj@serenityos.org>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include "Frequency.h"
#include <LibWeb/CSS/Percentage.h>

namespace Web::CSS {

Frequency::Frequency(int value, Type type)
    : m_type(type)
    , m_value(value)
{
}

Frequency::Frequency(float value, Type type)
    : m_type(type)
    , m_value(value)
{
}

Frequency Frequency::make_hertz(float value)
{
    return { value, Type::Hz };
}

Frequency Frequency::percentage_of(Percentage const& percentage) const
{
    return Frequency { percentage.as_fraction() * m_value, m_type };
}

ErrorOr<String> Frequency::to_string() const
{
    return String::formatted("{}{}", m_value, unit_name());
}

float Frequency::to_hertz() const
{
    switch (m_type) {
    case Type::Hz:
        return m_value;
    case Type::kHz:
        return m_value * 1000;
    }
    VERIFY_NOT_REACHED();
}

StringView Frequency::unit_name() const
{
    switch (m_type) {
    case Type::Hz:
        return "hz"sv;
    case Type::kHz:
        return "khz"sv;
    }
    VERIFY_NOT_REACHED();
}

Optional<Frequency::Type> Frequency::unit_from_name(StringView name)
{
    if (name.equals_ignoring_ascii_case("hz"sv)) {
        return Type::Hz;
    } else if (name.equals_ignoring_ascii_case("khz"sv)) {
        return Type::kHz;
    }
    return {};
}

}