/******************************************************************************
    Copyright (C) 2019-2020 by Dillon Pentz <dillon@vodbox.io>

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 2 of the License, or
    (at your option) any later version.

    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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/

#include "importers.hpp"

using namespace std;
using namespace json11;

void TranslateOSStudio(Json &res)
{
	Json::object out = res.object_items();
	Json::array sources = out["sources"].array_items();

	for (size_t i = 0; i < sources.size(); i++) {
		Json::object source = sources[i].object_items();
		Json::object settings = source["settings"].object_items();

		string id = source["id"].string_value();

#define DirectTranslation(before, after) \
	if (id == before) {              \
		source["id"] = after;    \
	}

#define ClearTranslation(before, after)              \
	if (id == before) {                          \
		source["id"] = after;                \
		source["settings"] = Json::object{}; \
	}

#ifdef __APPLE__
		DirectTranslation("text_gdiplus", "text_ft2_source");

		ClearTranslation("game_capture", "syphon-input");

		ClearTranslation("wasapi_input_capture",
				 "coreaudio_input_capture");
		ClearTranslation("wasapi_output_capture",
				 "coreaudio_output_capture");
		ClearTranslation("pulse_input_capture",
				 "coreaudio_input_capture");
		ClearTranslation("pulse_output_capture",
				 "coreaudio_output_capture");

		ClearTranslation("jack_output_capture",
				 "coreaudio_output_capture");
		ClearTranslation("alsa_input_capture",
				 "coreaudio_input_capture");

		ClearTranslation("dshow_input", "av_capture_input");
		ClearTranslation("v4l2_input", "av_capture_input");

		ClearTranslation("xcomposite_input", "window_capture");

		if (id == "monitor_capture") {
			if (settings["show_cursor"].is_null() &&
			    !settings["capture_cursor"].is_null()) {
				bool cursor =
					settings["capture_cursor"].bool_value();

				settings["show_cursor"] = cursor;
			}
		}

		DirectTranslation("xshm_input", "monitor_capture");
#elif defined(_WIN32)
		DirectTranslation("text_ft2_source", "text_gdiplus");

		ClearTranslation("syphon-input", "game_capture");

		ClearTranslation("coreaudio_input_capture",
				 "wasapi_input_capture");
		ClearTranslation("coreaudio_output_capture",
				 "wasapi_output_capture");
		ClearTranslation("pulse_input_capture", "wasapi_input_capture");
		ClearTranslation("pulse_output_capture",
				 "wasapi_output_capture");

		ClearTranslation("jack_output_capture",
				 "wasapi_output_capture");
		ClearTranslation("alsa_input_capture", "wasapi_input_capture");

		ClearTranslation("av_capture_input", "dshow_input");
		ClearTranslation("v4l2_input", "dshow_input");

		ClearTranslation("xcomposite_input", "window_capture");

		if (id == "monitor_capture" || id == "xshm_input") {
			if (!settings["show_cursor"].is_null()) {
				bool cursor =
					settings["show_cursor"].bool_value();

				settings["capture_cursor"] = cursor;
			}

			source["id"] = "monitor_capture";
		}
#else
		DirectTranslation("text_gdiplus", "text_ft2_source");

		ClearTranslation("coreaudio_input_capture",
				 "pulse_input_capture");
		ClearTranslation("coreaudio_output_capture",
				 "pulse_output_capture");
		ClearTranslation("wasapi_input_capture", "pulse_input_capture");
		ClearTranslation("wasapi_output_capture",
				 "pulse_output_capture");

		ClearTranslation("av_capture_input", "v4l2_input");
		ClearTranslation("dshow_input", "v4l2_input");

		ClearTranslation("window_capture", "xcomposite_input");

		if (id == "monitor_capture") {
			source["id"] = "xshm_input";

			if (settings["show_cursor"].is_null() &&
			    !settings["capture_cursor"].is_null()) {
				bool cursor =
					settings["capture_cursor"].bool_value();

				settings["show_cursor"] = cursor;
			}
		}
#endif
		source["settings"] = settings;
		sources[i] = source;
#undef DirectTranslation
#undef ClearTranslation
	}

	res = out;
}

bool StudioImporter::Check(const string &path)
{
	BPtr<char> file_data = os_quick_read_utf8_file(path.c_str());
	string err;
	Json collection = Json::parse(file_data, err);

	if (err != "")
		return false;

	if (collection.is_null())
		return false;

	if (collection["sources"].is_null())
		return false;

	if (collection["name"].is_null())
		return false;

	if (collection["current_scene"].is_null())
		return false;

	return true;
}

string StudioImporter::Name(const string &path)
{
	BPtr<char> file_data = os_quick_read_utf8_file(path.c_str());
	string err;

	Json d = Json::parse(file_data, err);

	string name = d["name"].string_value();

	return name;
}

int StudioImporter::ImportScenes(const string &path, string &name, Json &res)
{
	if (!os_file_exists(path.c_str()))
		return IMPORTER_FILE_NOT_FOUND;

	if (!Check(path.c_str()))
		return IMPORTER_FILE_NOT_RECOGNISED;

	BPtr<char> file_data = os_quick_read_utf8_file(path.c_str());
	string err;
	Json d = Json::parse(file_data, err);

	if (err != "")
		return IMPORTER_ERROR_DURING_CONVERSION;

	TranslateOSStudio(d);

	Json::object obj = d.object_items();

	if (name != "")
		obj["name"] = name;
	else
		obj["name"] = "OBS Studio Import";

	res = obj;

	return IMPORTER_SUCCESS;
}