/*
 * Copyright (c) 2020, the SerenityOS developers.
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include <AK/StringBuilder.h>
#include <LibGemini/Document.h>

namespace Gemini {

String Text::render_to_html() const
{
    StringBuilder builder;
    builder.append(escape_html_entities(m_text));
    builder.append("<br>\n");
    return builder.build();
}

Text::~Text()
{
}

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

Heading::~Heading()
{
}

String 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>");
    builder.append(escape_html_entities(m_text.substring_view(1, m_text.length() - 1)));
    builder.append("</li>");
    return builder.build();
}
UnorderedList::~UnorderedList()
{
}

String 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 "";
    }
}
Control::~Control()
{
}

Link::Link(String text, const Document& 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_first_of(" \t");
    String 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_null())
        m_name = m_url.to_string();
}
Link::~Link()
{
}

String Link::render_to_html() const
{
    StringBuilder builder;
    builder.append("<a href=\"");
    builder.append(escape_html_entities(m_url.to_string()));
    builder.append("\">");
    builder.append(escape_html_entities(m_name));
    builder.append("</a><br>\n");
    return builder.build();
}

String Preformatted::render_to_html() const
{
    StringBuilder builder;
    builder.append(escape_html_entities(m_text));
    builder.append("\n");

    return builder.build();
}
Preformatted::~Preformatted()
{
}

Line::~Line()
{
}

}