/*  This file is part of epubgrep.
 *  Copyright © 2021 tastytea <tastytea@tastytea.de>
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, version 3.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "output.hpp"

#include "version.hpp"

#include <boost/locale/message.hpp>
#include <fmt/format.h>
#include <fmt/ostream.h> // For compatibility with fmt 4.
#include <nlohmann/json.hpp>
#include <termcolor/termcolor.hpp>

#include <cstdint>
#include <iostream>
#include <sstream>

namespace epubgrep::output
{

using boost::locale::translate;
using fmt::format;
using std::cout;

void print_matches(const std::vector<search::match> &matches,
                   const options::options &opts, bool single_file)
{
    if (!single_file && !opts.no_fn_fs)
    {
        if (!opts.nocolor)
        {
            cout << termcolor::yellow;
        }
        cout << format(translate("  In {0:s}: \n").str(),
                       fs::relative(matches[0].filepath_epub));
        if (!opts.nocolor)
        {
            cout << termcolor::reset;
        }
    }

    for (const auto &match : matches)
    {
        std::vector<std::string> metadata;
        if (!opts.no_fn_epub)
        {
            metadata.emplace_back(match.filepath_inside);
        }
        if (!match.headline.empty())
        {
            // <https://github.com/ikalnytskyi/termcolor/issues/45>
            if (!opts.nocolor && termcolor::_internal::is_colorized(cout))
            {
                std::stringstream ss;
                ss << termcolor::colorize << termcolor::underline
                   << match.headline << termcolor::reset << termcolor::italic;
                metadata.emplace_back(ss.str());
            }
            else
            {
                metadata.emplace_back(match.headline);
            }
        }
        if (!match.page.empty())
        {
            metadata.emplace_back("page " + match.page);
        }
        if (!metadata.empty())
        {
            if (!opts.nocolor)
            {
                cout << termcolor::italic;
            }
            for (const auto &part : metadata)
            {
                cout << part;
                if (part != *(metadata.rbegin()))
                {
                    cout << ", ";
                }
            }
            cout << ": ";
            if (!opts.nocolor)
            {
                cout << termcolor::reset;
            }
        }
        cout << match.context.first;
        if (!opts.nocolor)
        {
            cout << termcolor::bright_magenta;
        }
        cout << match.text;
        if (!opts.nocolor)
        {
            cout << termcolor::reset;
        }
        cout << match.context.second << '\n';
    }
}

void json_all(const std::vector<std::vector<search::match>> &matches_all)
{
    nlohmann::json json;

    json["generator"] = {{"epubgrep", std::string(version)}};

    for (const auto &matches : matches_all)
    {
        for (const auto &match : matches)
        {
            json["matches"].push_back(
                {{"filepath_epub", match.filepath_epub.string()},
                 {"filepath_inside", match.filepath_inside},
                 {"match", match.text},
                 {"context", {match.context.first, match.context.second}},
                 {"headline", match.headline},
                 {"page", match.page}});
        }
    }

    cout << json.dump() << '\n';
}

void html_all(const std::vector<std::vector<search::match>> &matches_all,
              const options::options &opts)
{
    std::uint64_t count{1};

    cout << "<!DOCTYPE html>\n";
    // Translators: Replace “en” with your language code here.
    cout << format(R"(<html lang="{0:s}">)", translate("en").str());
    cout << "<head><title>epubgrep output</title>"
            "<style>article { margin: 1em; }</style>"
            "</head><body>\n\n";

    for (const auto &matches : matches_all)
    {
        const auto identifier{
            [&opts, count, &matches]
            {
                if (opts.no_fn_fs)
                {
                    return format(translate("File {0:d}").str(), count);
                }
                return fs::relative(matches[0].filepath_epub).string();
            }()};

        // Start article, table and print table header.
        cout << format(R"(<article aria-labelledby="file_{0:d}">)", count)
             << "\n  <table>\n"
             << format(R"(    <caption id="file_{0:d}">{1:s}</caption>)", count,
                       identifier)
             << '\n'
             << "    <tr>\n";
        if (!opts.no_fn_epub)
        {
            cout << format(R"(      <th id="file_path_{0:d}">{1:s}</th>)",
                           count, translate("File path (in EPUB file)"))
                 << '\n';
        }
        cout << format(R"(      <th id="headline_{0:d}">{1:s}</th>)", count,
                       translate("Last headline"))
             << '\n'
             << format(R"(      <th id="page_{0:d}">{1:s}</th>)", count,
                       translate("Page number"))
             << '\n'
             << format(R"(      <th id="match_{0:d}">{1:s}</th>)", count,
                       translate("Match"))
             << "\n    </tr>\n";

        for (const auto &match : matches)
        {
            const auto lang{[&match]
                            {
                                if (!match.language.empty())
                                {
                                    return format(R"( lang="{0:s}")",
                                                  match.language);
                                }
                                return std::string{};
                            }()};
            cout << "    <tr>\n";
            if (!opts.no_fn_epub)
            {
                cout << format(
                    R"(      <td headers="file_path_{0:d}">{1:s}</td>)", count,
                    match.filepath_inside)
                     << '\n';
            }
            cout << format(
                R"(      <td headers="headline_{0:d}"{1:s}>{2:s}</td>)", count,
                lang, match.headline)
                 << '\n';
            cout << format(R"(      <td headers="page_{0:d}">{1:s}</td>)",
                           count, match.page)
                 << '\n';
            cout << format(R"(      <td headers="match_{0:d}"{1:s}>{2:s})"
                           R"(<strong>{3:s}</strong>{4:s}</td>)",
                           count, lang, match.context.first, match.text,
                           match.context.second)
                 << '\n';
            cout << "    </tr>\n";
        }
        cout << "  </table>\n</article>\n\n";
        ++count;
    }

    cout << "</body></html>\n";
}

} // namespace epubgrep::output