/*

 * Copyright (c) 2020-2022, the SerenityOS developers.

 *

 * SPDX-License-Identifier: BSD-2-Clause

 */

#include <AK/StringBuilder.h>

#include <LibGemini/Document.h>

namespace Gemini {

ByteString Text::render_to_html() const

{

    StringBuilder builder;

    builder.append(escape_html_entities(m_text));

    builder.append("<br>\n"sv);

    return builder.to_byte_string();

}

ByteString Heading::render_to_html() const

{

    return ByteString::formatted("<h{}>{}</h{}>", m_level, escape_html_entities(m_text.substring_view(m_level, m_text.length() - m_level)), m_level);

}

ByteString UnorderedList::render_to_html() const

{

    // 1.3.5.4.2 "Advanced clients can take the space of the bullet symbol into account"

    //           FIXME: The spec is unclear about what the space means, or where it goes

    //                  somehow figure this out

    StringBuilder builder;

    builder.append("<li>"sv);

    builder.append(escape_html_entities(m_text.substring_view(1, m_text.length() - 1)));

    builder.append("</li>"sv);

    return builder.to_byte_string();

}

ByteString Control::render_to_html() const

{

    switch (m_kind) {

    case Kind::PreformattedEnd:

        return "</pre>";

    case Kind::PreformattedStart:

        return "<pre>";

    case Kind::UnorderedListStart:

        return "<ul>";

    case Kind::UnorderedListEnd:

        return "</ul>";

    default:

        dbgln("Unknown control kind _{}_", (int)m_kind);

        VERIFY_NOT_REACHED();

        return "";

    }

}

Link::Link(ByteString text, Document const& document)

    : Line(move(text))

{

    size_t index = 2;

    while (index < m_text.length() && (m_text[index] == ' ' || m_text[index] == '\t'))

        ++index;

    auto url_string = m_text.substring_view(index, m_text.length() - index);

    auto space_offset = url_string.find_any_of(" \t"sv);

    ByteString url = url_string;

    if (space_offset.has_value()) {

        url = url_string.substring_view(0, space_offset.value());

        auto offset = space_offset.value();

        while (offset < url_string.length() && (url_string[offset] == ' ' || url_string[offset] == '\t'))

            ++offset;

        m_name = url_string.substring_view(offset, url_string.length() - offset);

    }

    m_url = document.url().complete_url(url);

    if (m_name.is_empty())

        m_name = m_url.to_byte_string();

}

ByteString Link::render_to_html() const

{

    StringBuilder builder;

    builder.append("<a href=\""sv);

    builder.append(escape_html_entities(m_url.to_byte_string()));

    builder.append("\">"sv);

    builder.append(escape_html_entities(m_name));

    builder.append("</a><br>\n"sv);

    return builder.to_byte_string();

}

ByteString Preformatted::render_to_html() const

{

    StringBuilder builder;

    builder.append(escape_html_entities(m_text));

    builder.append('\n');

    return builder.to_byte_string();

}

}