/*
 * Copyright (c) 2023, MacDue <macdue@dueutil.tech>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include "EdgeStyleValue.h"

namespace Web::CSS {

String EdgeStyleValue::to_string(SerializationMode mode) const
{
    if (mode == CSSStyleValue::SerializationMode::ResolvedValue) {
        if (edge() == PositionEdge::Right || edge() == PositionEdge::Bottom) {
            if (offset().is_percentage()) {
                auto flipped_percentage = 100 - offset().percentage().value();
                return Percentage(flipped_percentage).to_string();
            }
            Vector<NonnullOwnPtr<CalculationNode>> sum_parts;
            sum_parts.append(NumericCalculationNode::create(Percentage(100)));
            if (offset().is_length()) {
                sum_parts.append(NegateCalculationNode::create(NumericCalculationNode::create(offset().length())));
            } else {
                // FIXME: Flip calculated offsets (convert CSSMathValue to CalculationNode, then negate and append)
                return to_string(CSSStyleValue::SerializationMode::Normal);
            }
            auto flipped_absolute = CSSMathValue::create(SumCalculationNode::create(move(sum_parts)), CSSNumericType(CSSNumericType::BaseType::Length, 1));
            return flipped_absolute->to_string(mode);
        }
        return offset().to_string();
    }

    StringBuilder builder;

    if (m_properties.edge.has_value())
        builder.append(CSS::to_string(m_properties.edge.value()));

    if (m_properties.edge.has_value() && m_properties.offset.has_value())
        builder.append(' ');

    if (m_properties.offset.has_value())
        builder.append(m_properties.offset->to_string());

    return builder.to_string_without_validation();
}

}