#include "Live2dBackend.h"
#include "Application.h"
#include "HttpSession.h"
#include "ServiceLogic.h"
#include <boost/url/url_view.hpp>

Live2dBackend::Live2dBackend() {
    using namespace Amass;
    auto application = Singleton<Application>::instance();
    application->insertUrl("/api/v1/live2d/{path*}", [this, live2dModelsRoot{application->getLive2dModelsRoot()}](
                                                         HttpSession &session, const Application::Request &request,
                                                         const boost::urls::matches &matches) {
        using namespace boost::beast;
        boost::urls::url_view view(request.target());
        auto target = view.path();
        LOG(info) << target;
        if (target.find("..") != boost::beast::string_view::npos) {
            session.reply(ServiceLogic::badRequest(request, "Illegal request-target"));
            return;
        }
        std::string path = ResponseUtility::pathCat(live2dModelsRoot, matches["path"]);
        if (target.back() == '/') path.append("index.html");
        if (std::filesystem::is_directory(path)) path.append("/index.html");
        boost::beast::error_code ec;
        http::file_body::value_type body;
        body.open(path.c_str(), boost::beast::file_mode::scan, ec);
        if (ec == boost::beast::errc::no_such_file_or_directory) {
            std::ostringstream oss;
            oss << "The resource '" << target << "' was not found.";
            LOG(error) << oss.str();
            session.errorReply(request, http::status::not_found, oss.str());
            return;
        } else if (ec) {
            session.reply(ServiceLogic::serverError(request, ec.message()));
            return;
        }
        auto const size = body.size();
        http::response<http::file_body> res{std::piecewise_construct, std::make_tuple(std::move(body)),
                                            std::make_tuple(http::status::ok, request.version())};
        res.set(http::field::server, BOOST_BEAST_VERSION_STRING);
        res.set(http::field::content_type, ResponseUtility::mimeType(path));
        // res.set(http::field::access_control_allow_origin, "*");
        res.set(http::field::cache_control, "max-age=2592000");
        res.set(http::field::expires, "Fri, 22 Nov 2124 13:30:28 GMT");
        res.content_length(size);
        res.keep_alive(request.keep_alive());
        session.reply(std::move(res));
    });
}