//This file is terminal1d.h.
#ifndef TERMINAL1DH
#define TERMINAL1DH

#include <cstdlib>     //for rand
#include <cmath>       //for abs (Stroustrup p. 660)
#include <vector>
#include <map>

using namespace std;

extern "C" {
#include "term.h"
}

template <class CHAR = char>
class terminal1d: public vector<CHAR> {
private:
	CHAR _background;
public:
	terminal1d(CHAR initial_background = ' ')
		: vector<CHAR>(80, initial_background), _background(initial_background) {
		term_construct();
	}

	~terminal1d() {term_destruct();}

	CHAR background() const {return _background;}

	bool in_range(const iterator& it) const {
		return begin() <= it && it < end();
	}

	static char key() {return term_key();}
	static void wait(int milliseconds) {term_wait(milliseconds);}
	static void beep() {term_beep();}

	static double distance(const iterator& it1, const iterator& it2) {
		return abs(it1 - it2);
	}

	static difference_type rand() {return
#ifndef _MSC_VER
		std
#endif
		::rand() % 3 - 1;}

	static difference_type step(const iterator& it1, const iterator& it2) {
		return it1 > it2 ? -1 : it1 < it2;
	}

	typedef map<char, difference_type> keypad_t;

	static keypad_t keypad() {
#ifdef _MSC_VER
		//Microsoft map does not have the constructor with 2 arguments.
		keypad_t k;
		k.insert(make_pair('h', -1));   //left
		k.insert(make_pair('l',  1));   //right
		return k;
#else
		static const pair<char, difference_type> a[] = {
			make_pair('h', -1),         //left
			make_pair('l',  1)          //right
		};
		static const size_t n = sizeof a / sizeof a[0];
		return keypad_t(a, a + n);
#endif
	}
};
#endif