// Copyright 2009 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.

#include <cstdarg>
#include <cstring>
#include <mutex>
#include <ostream>
#include <set>
#include <string>

#include "Common/FileUtil.h"
#include "Common/IniFile.h"
#include "Common/StringUtil.h"
#include "Common/Timer.h"
#include "Common/Logging/ConsoleListener.h"
#include "Common/Logging/Log.h"
#include "Common/Logging/LogManager.h"

void GenericLog(LogTypes::LOG_LEVELS level, LogTypes::LOG_TYPE type,
		const char *file, int line, const char* fmt, ...)
{
	va_list args;
	va_start(args, fmt);
	if (LogManager::GetInstance())
		LogManager::GetInstance()->Log(level, type,
			file, line, fmt, args);
	va_end(args);
}

LogManager *LogManager::m_logManager = nullptr;

LogManager::LogManager()
{
	// create log containers
	m_Log[LogTypes::ACTIONREPLAY]       = new LogContainer("ActionReplay",    "ActionReplay");
	m_Log[LogTypes::AUDIO]              = new LogContainer("Audio",           "Audio Emulator");
	m_Log[LogTypes::AUDIO_INTERFACE]    = new LogContainer("AI",              "Audio Interface (AI)");
	m_Log[LogTypes::BOOT]               = new LogContainer("BOOT",            "Boot");
	m_Log[LogTypes::COMMANDPROCESSOR]   = new LogContainer("CP",              "CommandProc");
	m_Log[LogTypes::COMMON]             = new LogContainer("COMMON",          "Common");
	m_Log[LogTypes::CONSOLE]            = new LogContainer("CONSOLE",         "Dolphin Console");
	m_Log[LogTypes::DISCIO]             = new LogContainer("DIO",             "Disc IO");
	m_Log[LogTypes::DSPHLE]             = new LogContainer("DSPHLE",          "DSP HLE");
	m_Log[LogTypes::DSPLLE]             = new LogContainer("DSPLLE",          "DSP LLE");
	m_Log[LogTypes::DSP_MAIL]           = new LogContainer("DSPMails",        "DSP Mails");
	m_Log[LogTypes::DSPINTERFACE]       = new LogContainer("DSP",             "DSPInterface");
	m_Log[LogTypes::DVDINTERFACE]       = new LogContainer("DVD",             "DVD Interface");
	m_Log[LogTypes::DYNA_REC]           = new LogContainer("JIT",             "Dynamic Recompiler");
	m_Log[LogTypes::EXPANSIONINTERFACE] = new LogContainer("EXI",             "Expansion Interface");
	m_Log[LogTypes::FILEMON]            = new LogContainer("FileMon",         "File Monitor");
	m_Log[LogTypes::GDB_STUB]           = new LogContainer("GDB_STUB",        "GDB Stub");
	m_Log[LogTypes::GPFIFO]             = new LogContainer("GP",              "GPFifo");
	m_Log[LogTypes::HOST_GPU]           = new LogContainer("Host GPU",        "Host GPU");
	m_Log[LogTypes::MASTER_LOG]         = new LogContainer("*",               "Master Log");
	m_Log[LogTypes::MEMCARD_MANAGER]    = new LogContainer("MemCard Manager", "MemCard Manager");
	m_Log[LogTypes::MEMMAP]             = new LogContainer("MI",              "MI & memmap");
	m_Log[LogTypes::NETPLAY]            = new LogContainer("NETPLAY",         "Netplay");
	m_Log[LogTypes::OSHLE]              = new LogContainer("HLE",             "HLE");
	m_Log[LogTypes::OSREPORT]           = new LogContainer("OSREPORT",        "OSReport");
	m_Log[LogTypes::PAD]                = new LogContainer("PAD",             "Pad");
	m_Log[LogTypes::PIXELENGINE]        = new LogContainer("PE",              "PixelEngine");
	m_Log[LogTypes::PROCESSORINTERFACE] = new LogContainer("PI",              "ProcessorInt");
	m_Log[LogTypes::POWERPC]            = new LogContainer("PowerPC",         "IBM CPU");
	m_Log[LogTypes::SERIALINTERFACE]    = new LogContainer("SI",              "Serial Interface (SI)");
	m_Log[LogTypes::SP1]                = new LogContainer("SP1",             "Serial Port 1");
	m_Log[LogTypes::VIDEO]              = new LogContainer("Video",           "Video Backend");
	m_Log[LogTypes::VIDEOINTERFACE]     = new LogContainer("VI",              "Video Interface (VI)");
	m_Log[LogTypes::WIIMOTE]            = new LogContainer("Wiimote",         "Wiimote");
	m_Log[LogTypes::WII_IPC]            = new LogContainer("WII_IPC",         "WII IPC");
	m_Log[LogTypes::WII_IPC_DVD]        = new LogContainer("WII_IPC_DVD",     "WII IPC DVD");
	m_Log[LogTypes::WII_IPC_ES]         = new LogContainer("WII_IPC_ES",      "WII IPC ES");
	m_Log[LogTypes::WII_IPC_FILEIO]     = new LogContainer("WII_IPC_FILEIO",  "WII IPC FILEIO");
	m_Log[LogTypes::WII_IPC_HID]        = new LogContainer("WII_IPC_HID",     "WII IPC HID");
	m_Log[LogTypes::WII_IPC_HLE]        = new LogContainer("WII_IPC_HLE",     "WII IPC HLE");
	m_Log[LogTypes::WII_IPC_SD]         = new LogContainer("WII_IPC_SD",      "WII IPC SD");
	m_Log[LogTypes::WII_IPC_SSL]        = new LogContainer("WII_IPC_SSL",     "WII IPC SSL");
	m_Log[LogTypes::WII_IPC_STM]        = new LogContainer("WII_IPC_STM",     "WII IPC STM");
	m_Log[LogTypes::WII_IPC_NET]        = new LogContainer("WII_IPC_NET",     "WII IPC NET");
	m_Log[LogTypes::WII_IPC_WC24]       = new LogContainer("WII_IPC_WC24",    "WII IPC WC24");
	m_Log[LogTypes::WII_IPC_WIIMOTE]    = new LogContainer("WII_IPC_WIIMOTE", "WII IPC WIIMOTE");

	RegisterListener(LogListener::FILE_LISTENER, new FileLogListener(File::GetUserPath(F_MAINLOG_IDX)));
	RegisterListener(LogListener::CONSOLE_LISTENER, new ConsoleListener());

	IniFile ini;
	ini.Load(File::GetUserPath(F_LOGGERCONFIG_IDX));
	IniFile::Section* logs = ini.GetOrCreateSection("Logs");
	IniFile::Section* options = ini.GetOrCreateSection("Options");
	bool write_file;
	bool write_console;
	options->Get("WriteToFile", &write_file, false);
	options->Get("WriteToConsole", &write_console, true);

	for (LogContainer* container : m_Log)
	{
		bool enable;
		logs->Get(container->GetShortName(), &enable, false);
		container->SetEnable(enable);
		if (enable && write_file)
			container->AddListener(LogListener::FILE_LISTENER);
		if (enable && write_console)
			container->AddListener(LogListener::CONSOLE_LISTENER);
	}
}

LogManager::~LogManager()
{
	for (LogContainer* container : m_Log)
		delete container;

	// The log window listener pointer is owned by the GUI code.
	delete m_listeners[LogListener::CONSOLE_LISTENER];
	delete m_listeners[LogListener::FILE_LISTENER];
}

void LogManager::Log(LogTypes::LOG_LEVELS level, LogTypes::LOG_TYPE type,
	const char *file, int line, const char *format, va_list args)
{
	char temp[MAX_MSGLEN];
	LogContainer *log = m_Log[type];

	if (!log->IsEnabled() || level > log->GetLevel() || !log->HasListeners())
		return;

	CharArrayFromFormatV(temp, MAX_MSGLEN, format, args);

	std::string msg = StringFromFormat("%s %s:%u %c[%s]: %s\n",
	                                   Common::Timer::GetTimeFormatted().c_str(),
	                                   file, line,
	                                   LogTypes::LOG_LEVEL_TO_CHAR[(int)level],
	                                   log->GetShortName().c_str(), temp);

	for (auto listener_id : *log)
		m_listeners[listener_id]->Log(level, msg.c_str());
}

void LogManager::Init()
{
	m_logManager = new LogManager();
}

void LogManager::Shutdown()
{
	delete m_logManager;
	m_logManager = nullptr;
}

LogContainer::LogContainer(const std::string& shortName, const std::string& fullName, bool enable)
	: m_fullName(fullName),
	  m_shortName(shortName),
	  m_enable(enable),
	  m_level(LogTypes::LWARNING)
{
}

FileLogListener::FileLogListener(const std::string& filename)
{
	OpenFStream(m_logfile, filename, std::ios::app);
	SetEnable(true);
}

void FileLogListener::Log(LogTypes::LOG_LEVELS, const char *msg)
{
	if (!IsEnabled() || !IsValid())
		return;

	std::lock_guard<std::mutex> lk(m_log_lock);
	m_logfile << msg << std::flush;
}