#include "switcher.h"
#include <obs-module.h>
#include <obs-data.h>
#include <fstream>
#include <string>
#include <sstream>
#include <boost/filesystem.hpp>

using namespace std;

//Swicthing done in here
Switcher *switcher = new Switcher();
//settings source
struct obs_source_info sceneSwitcherOptionsSource;
//Hotkeys
const char *PAUSE_HOTKEY_NAME = "pauseHotkey";
obs_hotkey_id pauseHotkeyId;
obs_data_array_t *pauseHotkeyData;
//path to config folder where to save the hotkeybinding (probably later the settings file)
char* configPath;

//save settings (the only hotkey for now)
void saveKeybinding(string name, obs_data_array_t *hotkeyData) {
	if (hotkeyData != NULL) {
		name.append(".txt");
		//save hotkey data
		ofstream file;
		file.open(string(configPath).append(name), ofstream::trunc);
		//hotkeyData = obs_hotkey_save(pauseHotkeyId); 	//doesnt seem to work in obs_module_unload (hotkey data freed already (<- Jim))
		if (file.is_open()) {
			size_t num = obs_data_array_count(hotkeyData);
			for (size_t i = 0; i < num; i++) {
				obs_data_t *data = obs_data_array_item(hotkeyData, i);
				string temp = obs_data_get_json(data);
				obs_data_release(data);
				file << temp;
			}
			file.close();
		}
		obs_data_array_release(hotkeyData);
	}
}

string loadConfigFile(string filename) {
	ifstream settingsFile;
	settingsFile.open(string(configPath).append(filename));
	string value;
	if (settingsFile.is_open())
	{
		settingsFile.seekg(0, ios::end);
		value.reserve(settingsFile.tellg());
		settingsFile.seekg(0, ios::beg);
		value.assign((istreambuf_iterator<char>(settingsFile)), istreambuf_iterator<char>());
		settingsFile.close();
	}
	return value;
}

void loadKeybinding(string name, obs_hotkey_id hotkeyId) {
	string temp = loadConfigFile(name.append(".txt"));
	if (!temp.empty())
	{
		obs_data_array_t *hotkeyData = obs_data_array_create();
		obs_data_t *data = obs_data_create_from_json(temp.c_str());
		obs_data_array_insert(hotkeyData, 0, data);
		obs_hotkey_load(hotkeyId, hotkeyData);
		obs_data_release(data);
		obs_data_array_release(hotkeyData);
	}
}

OBS_DECLARE_MODULE()

void SceneSwitcherPauseHotkey(void *data, obs_hotkey_id id, obs_hotkey_t *hotkey, bool pressed) {
	UNUSED_PARAMETER(data);
	UNUSED_PARAMETER(hotkey);
	if (pressed)
	{
		if (switcher->getIsRunning())
		{
			switcher->stop();
		}
		else
		{
			switcher->start();
		}
	}
	//save the keybinding here since it is not possible in obs_module_unload
	obs_data_array_release(pauseHotkeyData);
	pauseHotkeyData = obs_hotkey_save(id);
}

const char *sceneSwitcherOptionsGetName(void *type_data) {
	UNUSED_PARAMETER(type_data);
	return "Scene Switcher Options";
}
void *sceneSwitcherOptionsCreate(obs_data_t *settings, obs_source_t *source) {
	UNUSED_PARAMETER(settings);
	UNUSED_PARAMETER(source);
	return switcher;
}
void sceneSwitcherOptionsDestroy(void *data) {
	UNUSED_PARAMETER(data);
}
uint32_t sceneSwitcherOptionsGetWidth(void *data) {
	UNUSED_PARAMETER(data);
	return 0;
}
uint32_t sceneSwitcherOptionsGetHeight(void *data) {
	UNUSED_PARAMETER(data);
	return 0;
}
void sceneSwitcherOptionsSourceGetDefaults(obs_data_t *settings) {
	//load settings file
	string temp = loadConfigFile("settings.txt");
	//set values from file
	obs_data_t *data = obs_data_create_from_json(temp.c_str());
	obs_data_apply(settings, data);
	obs_data_release(data);
}
obs_properties_t *sceneSwitcherOptionsSourceGetProperties(void *data) {
	UNUSED_PARAMETER(data);
	obs_properties_t *props = obs_properties_create();
	obs_properties_add_bool(props, "StartMessageDisable", "Disable Start Message");
	obs_properties_add_editable_list(props,
		"WindowList", "",
		(enum obs_editable_list_type)0, "",
		NULL);
	return props;
}
void sceneSwitcherOptionsSourceSave(void *data, obs_data_t *settings) {
	UNUSED_PARAMETER(data);
	//hang here if multiple instances of Scene Switcher Options are active (why?)
	ofstream settingsFile;
	settingsFile.open(string(configPath).append("settings.txt"), ofstream::trunc);
	if (settingsFile.is_open()) {
		settingsFile << obs_data_get_json(settings);
		settingsFile.close();
	}
	if (switcher->getIsRunning())
		switcher->stop();
	switcher->load();
	switcher->start();
}
void sceneSwitcherOptionsSourceLoad(void *data, obs_data_t *settings) {
	UNUSED_PARAMETER(data);
	//load settings file
	string temp = loadConfigFile("settings.txt");
	//set values from file
	obs_data_t *loadedSettings = obs_data_create_from_json(temp.c_str());
	obs_data_apply(settings, loadedSettings);
	obs_data_release(loadedSettings);
}

void sceneSwitcherOptionsSourceSetup() {
	sceneSwitcherOptionsSource.id = "Scene Switcher Options";
	sceneSwitcherOptionsSource.type = OBS_SOURCE_TYPE_INPUT;
	sceneSwitcherOptionsSource.get_name = sceneSwitcherOptionsGetName;
	sceneSwitcherOptionsSource.create = sceneSwitcherOptionsCreate;
	sceneSwitcherOptionsSource.destroy = sceneSwitcherOptionsDestroy;
	sceneSwitcherOptionsSource.get_width = sceneSwitcherOptionsGetWidth;
	sceneSwitcherOptionsSource.get_height = sceneSwitcherOptionsGetHeight;
	sceneSwitcherOptionsSource.get_defaults = sceneSwitcherOptionsSourceGetDefaults; //create settings file if not present
	sceneSwitcherOptionsSource.get_properties = sceneSwitcherOptionsSourceGetProperties;
	sceneSwitcherOptionsSource.update = sceneSwitcherOptionsSourceSave; //save new settings to file
	sceneSwitcherOptionsSource.load = sceneSwitcherOptionsSourceLoad; //read settings file
	obs_register_source(&sceneSwitcherOptionsSource);
}

bool obs_module_load(void) {
	//set config path and check if config dir was set up
	configPath = obs_module_config_path("");
	boost::filesystem::create_directories(configPath);//<- memory leak here somehow
	//register hotkey
	pauseHotkeyId = obs_hotkey_register_frontend(PAUSE_HOTKEY_NAME, "Toggle automatic scene switching", SceneSwitcherPauseHotkey, NULL);
	//load hotkey binding if set already
	loadKeybinding(PAUSE_HOTKEY_NAME, pauseHotkeyId);
	//load settings file
	switcher->setSettingsFilePath(configPath);
	switcher->firstLoad();
	//create options menu
	sceneSwitcherOptionsSourceSetup();
	//start the switching thread
	switcher->start();
	return true;
}

void obs_module_unload(void) {
	bfree(configPath);
	switcher->stop();
	//save settings (only hotkey for now)
	saveKeybinding(PAUSE_HOTKEY_NAME, pauseHotkeyData);
	obs_data_array_release(pauseHotkeyData);
	delete switcher;
	switcher = NULL;
}

const char *obs_module_author(void) {
	return "WarmUpTill";
}

const char *obs_module_name(void) {
	return "Scene Switcher";
}

const char *obs_module_description(void) {
	return "Automatic scene switching";
}