#include <iostream>
#include <switch.h>
#include <cstring>
#include <sstream>
#include <filesystem>
#include "util/lang.hpp"
#include "util/config.hpp"

namespace Language {
	json lang;

	void Load() {
		//https://switchbrew.org/wiki/Settings_services#LanguageCode
		//Get language from the switch system settings.
		SetLanguage ourLang;
		u64 lcode = 0;
		setInitialize();
		setGetSystemLanguage(&lcode);
		setMakeLanguage(lcode, &ourLang);
		setExit();
		int syslang = (int)ourLang;
		std::ifstream ifs;
		std::string languagePath;
		int langInt = inst::config::languageSetting;
		if (std::filesystem::exists(inst::config::appDir + "/lang/custom.json")) {
			languagePath = (inst::config::appDir + "/lang/custom.json");
		}
		else {
			switch (langInt) {
			case 1:
				languagePath = "romfs:/lang/en.json";
				break;
			case 2:
				languagePath = "romfs:/lang/jp.json";
				break;
			case 3:
				languagePath = "romfs:/lang/fr.json";
				break;
			case 4:
				languagePath = "romfs:/lang/de.json";
				break;
			case 5:
				languagePath = "romfs:/lang/it.json";
				break;
			case 6:
				languagePath = "romfs:/lang/ru.json";
				break;
			case 7:
				languagePath = "romfs:/lang/es.json";
				break;
			case 8:
				languagePath = "romfs:/lang/tw.json";
				break;
			case 0:
				switch (syslang) {
				case 0: //Japanese
					languagePath = "romfs:/lang/jp.json";
					break;
				case 1: //AmericanEnglish
					languagePath = "romfs:/lang/en.json";
					break;
				case 2: //French
					languagePath = "romfs:/lang/fr.json";
					break;
				case 3: //German
					languagePath = "romfs:/lang/de.json";
					break;
				case 4: //Italian
					languagePath = "romfs:/lang/it.json";
					break;
				case 5: //Spanish
					languagePath = "romfs:/lang/es.json";
					break;
				case 6: //Chinese
					languagePath = "romfs:/lang/tw.json";
					break;
				case 7: //Korean
					languagePath = "romfs:/lang/en.json";
					break;
				case 8: //Dutch
					languagePath = "romfs:/lang/en.json";
					break;
				case 9: //Portuguese
					languagePath = "romfs:/lang/en.json";
					break;
				case 10: //Russian
					languagePath = "romfs:/lang/ru.json";
					break;
				case 11: //Taiwanese
					languagePath = "romfs:/lang/tw.json";
					break;
				case 12: //BritishEnglish
					languagePath = "romfs:/lang/en.json";
					break;
				case 13: //CanadianFrench
					languagePath = "romfs:/lang/fr.json";
					break;
				case 14: //LatinAmericanSpanish
					languagePath = "romfs:/lang/es.json";
					break;
				case 15: //SimplifiedChinese
					languagePath = "romfs:/lang/tw.json";
					break;
				case 16: //TraditionalChinese
					languagePath = "romfs:/lang/tw.json";
					break;
				case 17: //BrazilianPortuguese
					languagePath = "romfs:/lang/en.json";
					break;
				default:
					languagePath = "romfs:/lang/en.json";
					break;
				}
				break;
			default:
				languagePath = "romfs:/lang/en.json";
				break;
			}
		}
		if (std::filesystem::exists(languagePath)) ifs = std::ifstream(languagePath);
		else ifs = std::ifstream("romfs:/lang/en.json");
		if (!ifs.good()) {
			std::cout << "[FAILED TO LOAD LANGUAGE FILE]" << std::endl;
			return;
		}
		lang = json::parse(ifs);
		ifs.close();
	}

	std::string LanguageEntry(std::string key) {
		json j = GetRelativeJson(lang, key);
		if (j == nullptr) {
			return "didn't find: " + key;
		}
		return j.get<std::string>();
	}

	std::string GetRandomMsg() {
		json j = Language::GetRelativeJson(lang, "inst.finished");
		srand(time(NULL));
		return(j[rand() % j.size()]);
	}
}