#include "String.h"
#include <cassert>
#include <cstring>
#include <iostream>

namespace ecci
{

#ifdef TESTING
/*static*/ size_t String::instanceCount = 0;
#endif

String::String(const char* cstring)
	: length{ Length(strlen(cstring)) }
	, text{ new char[ length + 1 ] }
{
	assert(text);
	strcpy(text, cstring);

  #ifdef TESTING
	++instanceCount;
  #endif
  #ifdef TESTING2
	instanceNumber = instanceCount;
	std::cerr << "String(" << text << ")[" << instanceNumber << "]\n";
  #endif
}

String::String(Length capacity)
	: length(0)
	, text(new char[capacity + 1])
{
	text[0] = '\0';

  #ifdef TESTING
	++instanceCount;
  #endif
  #ifdef TESTING2
	instanceNumber = instanceCount;
	std::cerr << "String[" << capacity << "][" << instanceNumber << "]\n";
  #endif
}

String::String(const String& other)
	: length{ other.length }
	, text{ new char[ length + 1 ] }
{
	assert(text);
	strcpy(text, other.text);

  #ifdef TESTING
	++instanceCount;
  #endif
  #ifdef TESTING2
	instanceNumber = instanceCount;
	std::cerr << "StringCp(" << text << ")[" << instanceNumber << "]\n";
  #endif
}

String::String(String&& other)
	: length{ other.length }
	, text{ other.text }
{
	other.length = 0;
	other.text = nullptr;

  #ifdef TESTING
	++instanceCount;
  #endif
  #ifdef TESTING2
	instanceNumber = instanceCount;
	std::cerr << "StringMv(" << text << ")[" << instanceNumber << "]\n";
  #endif
}

String::~String()
{
  #ifdef TESTING
	--instanceCount;
  #endif
  #ifdef TESTING2
	std::cerr << "~String(" << (text ? text : "nullptr") << ")[" << instanceNumber << "]\n";
  #endif

	delete [] text;
}

String& String::operator=(const String& other)
{
	if ( this != &other )
	{
		length = other.length;
		delete [] text;
		text = new char[ length + 1 ];
		assert(text);
		strcpy(text, other.text);
	}

  #ifdef TESTING2
	std::cerr << "operator=Cp(" << text << ")[" << instanceNumber << "]\n";
  #endif

	return *this;
}

String& String::operator=(String&& other)
{
	if ( this != &other )
	{
		length = other.length;
		delete [] text;
		text = other.text;
		assert(text);

		other.length = 0;
		other.text = nullptr;
	}

  #ifdef TESTING2
	std::cerr << "operator=Mv(" << text << ")[" << instanceNumber << "]\n";
  #endif
	return *this;
}


String String::operator+(const String& other) const
{
	String result(this->length + other.length);
	strcpy(result.text, this->text);
	strcpy(result.text + this->length, other.text);
	result.length = this->length + other.length;
	return result;
}

String String::operator+(char ch) const
{
	if ( ch == '\0')
		return *this;

	String result(this->length + 1);
	strcpy(result.text, this->text);
	result.text[this->length] = ch;
	result.text[this->length + 1] = '\0';
	result.length = this->length + 1;
	return result;
}

/*friend*/ String operator+(char ch, const String& string)
{
	if ( ch == '\0')
		return String();

	String result(1 + string.length);
	result.text[0] = ch;
	strcpy(result.text + 1, string.text);
	result.length = 1 + string.length;
	return result;
}


} // namespace ecci