#include "Common.h"
#include "ServerProperties.h"
#include <iostream>
#include <fstream>
#include <string_view>
#include <algorithm>
#include <ctime>
#include <cstring>
#include <iomanip>

#include "../util/StringUtil.h"

namespace Feather::Config
{
    void ServerProperties::Load()
    {
        std::ifstream file;
        file.open(path);

        Log::Info("Reading {}...", path);
        if (file.is_open())
        {
            string line;
            while(std::getline(file, line))
            {
                // trip whitespace
                StringUtil::trim(line);

                // skip comments
                if (line[0] == '#') continue;
                
                // key=value
                size_t pos = line.find('=');

                // java also accepts key:value
                if (pos == string::npos)
                    pos = line.find(':');

                if (pos == string::npos)
                    continue;
                
                string key = line.substr(0, pos);
                StringUtil::trim(key);
                string value = line.substr(pos + 1);
                StringUtil::trim(value);

                properties.insert( {key, value} );
            }
            file.close();
        }
        else
        {
            Log::Warn("Could not find {}", path);
        }
    }

    void ServerProperties::Save()
    {
        std::ofstream file;
        file.open(path);

        file << "#Minecraft server properties\n";

        auto time = std::time(nullptr);
        auto localTime = *std::localtime(&time);

        // The following code abbreviates a time zone like "Pacifc Daylight Time" 
        // to a short form like "PDT". If the time zone is already abbreviated
        // then it won't change the abbreviation

        char timeZone[256];
        strftime(timeZone, 256, "%Z", &localTime);

        char timeZoneAbbr[5];
        int counter = 0;
        for (int i = 0; i < strlen(timeZone); i++)
        {
            char c = timeZone[i];
            if (std::isupper(c)) {
                timeZoneAbbr[counter++] = c;
                // stop before last char to insert 0
                if (counter >= 4) {
                    timeZoneAbbr[counter] = 0;
                    break;
                }
            }
        }

        // Ex: Thu Jul 23 01:43:47 PDT 2020
        file << "#" << std::put_time(&localTime, "%a %b %d %H:%M:%S ") << timeZoneAbbr << std::put_time(&localTime, " %Y") << "\n";

        file << onlineMode << "\n";
        file << preventProxyConnections << "\n";
        file << serverIp << "\n";
        file << spawnAnimals << "\n";
        file << spawnNpcs << "\n";
        file << pvp << "\n";
        file << allowFlight << "\n";
        file << resourcePack << "\n";
        file << motd << "\n";
        file << forceGameMode << "\n";
        file << enforceWhitelist << "\n";
        file << levelName << "\n";
        file << serverPort << "\n";
        file << maxBuildHeight << "\n";
        //file << announcePlayerAchievements << "\n";
        file << enableQuery << "\n";
        file << queryPort << "\n";
        file << enableRcon << "\n";
        file << rconPort << "\n";
        file << rconPassword << "\n";
        //file << resourcePackHash << "\n";
        file << resourcePackSha1 << "\n";
        file << hardcore << "\n";
        file << allowNether << "\n";
        file << spawnMonsters << "\n";
        file << snooperEnabled << "\n";
        file << useNativeTransport << "\n";
        file << enableCommandBlock << "\n";
        file << spawnProtection << "\n";
        file << opPermissionLevel << "\n";
        file << functionPermissionLevel << "\n";
        file << maxTickTime << "\n";
        file << viewDistance << "\n";
        file << maxPlayers << "\n";
        file << networkCompressionThreshold << "\n";
        file << broadcastRconToOps << "\n";
        file << broadcastConsoleToOps << "\n";
        file << maxWorldSize << "\n";
        file << syncChunkWrites << "\n";
        file << enableJmxMonitoring << "\n";
        file << enableStatus << "\n";
        file << entityBroadcastRangePercentage << "\n";
        file << playerIdleTimeout << "\n";
        file << whiteList << "\n";

        file << "\n";
        file.close();
    }
}