/*
 * This file is a part of PikoTools
 * and is distributed under the (new) BSD licence.
 * Author: Tomasz Sowa <t.sowa@ttmath.org>
 */

/*
 * Copyright (c) 2018-2021, Tomasz Sowa
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  * Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 *  * Neither the name Tomasz Sowa nor the names of contributors to this
 *    project may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <ctime>
#include <string.h>
#include "log.h"
#include "date/date.h"
#include "utf8/utf8.h"

#ifdef PT_HAS_MORM
#include "morm.h"
#endif

namespace pt
{



Log::Log()
{
	buffer	  = nullptr;
	file_log  = nullptr;

	current_level = 4;
	max_buffer_length = 2 * 1024 * 1024; // 2MB
}


Log::~Log()
{
	// IMPROVE ME
	// I am not sure if this is a correct behaviour
	// the log buffer and file logger may not exist now
	// (life time of objects)
	// may would be better to have a flag 'clear_at_the_end'
	// and if true then call this method?

	save_log_and_clear();
}


void Log::SetLogBuffer(WTextStream * buffer)
{
	this->buffer = buffer;
}


WTextStream * Log::GetLogBuffer()
{
	return buffer;
}


void Log::SetMaxBufferLength(size_t max_buffer_length)
{
	this->max_buffer_length = max_buffer_length;
}


size_t Log::GetMaxBufferLength()
{
	return max_buffer_length;
}


void Log::SetFileLog(FileLog * file_log)
{
	this->file_log = file_log;
}


FileLog * Log::GetFileLog()
{
	return file_log;
}


Log & Log::IntMinWidth(size_t min_width)
{
	if( buffer )
	{
		buffer->int_min_width(min_width);
	}

	return *this;
}


Log & Log::operator<<(const void * s)
{
	if( buffer && file_log && current_level <= file_log->get_log_level() )
	{
		(*buffer) << s;
	}

    return *this;
}



Log & Log::operator<<(const char * s)
{
	if( buffer && file_log && s && current_level <= file_log->get_log_level() )
	{
		utf8_to_wide(s, *buffer, false);
	}

    return *this;
}



Log & Log::operator<<(const std::string & s)
{
	if( buffer && file_log && current_level <= file_log->get_log_level() )
	{
		utf8_to_wide(s, *buffer, false);
	}

    return *this;
}



Log & Log::operator<<(const std::string * s)
{
	if( buffer && file_log && current_level <= file_log->get_log_level() )
	{
		utf8_to_wide(*s, *buffer, false);
	}

    return *this;
}






Log & Log::operator<<(const wchar_t * s)
{
	if( buffer && file_log && s && current_level <= file_log->get_log_level() )
	{
		(*buffer) << s;
	}

    return *this;
}



Log & Log::operator<<(const std::wstring & s)
{
	if( buffer && file_log && current_level <= file_log->get_log_level() )
	{
		(*buffer) << s;
	}

    return *this;
}



Log & Log::operator<<(const std::wstring * s)
{
	if( buffer && file_log && s && current_level <= file_log->get_log_level() )
	{
		(*buffer) << *s;
	}

    return *this;
}





Log & Log::operator<<(int s)
{
	if( buffer && file_log && current_level <= file_log->get_log_level() )
	{
		(*buffer) << s;
	}

    return *this;
}



Log & Log::operator<<(long s)
{
	if( buffer && file_log && current_level <= file_log->get_log_level() )
	{
		(*buffer) << s;
	}

    return *this;
}


Log & Log::operator<<(long long s)
{
	if( buffer && file_log && current_level <= file_log->get_log_level() )
	{
		(*buffer) << s;
	}

    return *this;
}



Log & Log::operator<<(char s)
{
	if( buffer && file_log && current_level <= file_log->get_log_level() )
	{
		(*buffer) << s;
	}

    return *this;
}


Log & Log::operator<<(wchar_t s)
{
	if( buffer && file_log && current_level <= file_log->get_log_level() )
	{
		(*buffer) << s;
	}

    return *this;
}


Log & Log::operator<<(size_t s)
{
	if( buffer && file_log && current_level <= file_log->get_log_level() )
	{
		(*buffer) << s;
	}

    return *this;
}



Log & Log::operator<<(double s)
{
	if( buffer && file_log && current_level <= file_log->get_log_level() )
	{
		(*buffer) << s;
	}

    return *this;
}



Log & Log::operator<<(const Space & s)
{
	if( buffer && file_log && current_level <= file_log->get_log_level() )
	{
		(*buffer) << s;
	}

    return *this;
}



Log & Log::operator<<(const Date & date)
{
	if( buffer && file_log && current_level <= file_log->get_log_level() )
	{
		(*buffer) << date;
	}

    return *this;
}


#ifdef PT_HAS_MORM
Log & Log::operator<<(morm::Model & model)
{
	operator<<(model.to_string());
	return *this;
}
#endif


Log & Log::operator<<(Manipulators m)
{
	switch(m)
	{
	case lend:
	case logend:
		if( buffer && file_log && current_level <= file_log->get_log_level() )
		{
			(*buffer) << '\n';

			if( file_log->should_save_each_line() || buffer->size() > max_buffer_length )
				save_log_and_clear();
		}
		break;

	case lsave:
	case logsave:
		save_log_and_clear();
		break;

	case l1:
	case log1:
		current_level = 1;
		break;

	case l2:
	case log2:
		current_level = 2;
		break;

	case l3:
	case log3:
		current_level = 3;
		break;

	case l4:
	case log4:
		current_level = 4;
		break;

	default:
		break;
	}

	return *this;
}


Log & Log::LogString(const std::string & value, size_t max_size)
{
	return log_string_generic(value, max_size);
}


Log & Log::LogString(const std::wstring & value, size_t max_size)
{
	return log_string_generic(value, max_size);
}




char Log::get_hex_digit(unsigned char c)
{
	if( c < 10 )
		return c + '0';

return c - 10 + 'A';
}



void Log::to_hex(char * buf, unsigned char c)
{
	buf[0] = get_hex_digit(c >> 4);
	buf[1] = get_hex_digit(c & 0xf);
	buf[2] = 0;
}


Log & Log::LogBinary(const char * blob, size_t blob_len)
{
size_t i=0;
char buf[3];

	if( buffer && file_log && blob && current_level <= file_log->get_log_level() )
	{
		while( i < blob_len )
		{
			size_t oldi = i;

			for(size_t a=0 ; a<16 ; ++a)
			{
				if( i < blob_len )
				{
					to_hex(buf, blob[i]);
					(*buffer) << buf << ' ';
					++i;
				}
				else
				{
					(*buffer) << "   ";
				}

				if( a == 7 )
				{
					if( i < blob_len )
						(*buffer) << "- ";
					else
						(*buffer) << "  ";
				}
			}

			i = oldi;
			(*buffer) << ' ';

			for(size_t a=0 ; a<16 && i<blob_len ; ++a, ++i)
			{
				if( blob[i] > 31 && blob[i] < 127 )
					(*buffer) << blob[i];
				else
					(*buffer) << '.';
			}

			(*this) << logend;
		}
	}

	return *this;
}


Log & Log::LogBinary(const std::string & blob)
{
	return LogBinary(blob.c_str(), blob.size());
}



void Log::save_log_and_clear()
{
	save_log();

	if( buffer )
	{
		buffer->clear();
	}
}


void Log::save_log()
{
	if( file_log && buffer )
	{
		file_log->save_log(buffer);
	}
}


} // namespace