// Used ptr to take a copy of the head, move head move tail at end of array to previous head position from copy and make the old tail a nullptr 
#include "element.hpp"
#include <cstdlib>
#include <ctime>

int _score = 0;

void Point::set_new_point(int row, int col) {
	m_row = row;
	m_col = col;
}

void Point::set_new_point(Point &point) {
	set_new_point(point.m_row, point.m_col);
}

Fruit::Fruit() {
	m_point.set_new_point((rand() % ROW), (rand() % COL));
}

void Fruit::get_new_pos(char (&board)[ROW][COL], Head &head) {
	int row, col;
	if(m_point.m_row == head.m_head.m_row && m_point.m_col == head.m_head.m_col) {
		do {
			row = (rand() % ROW);
			col = (rand() % COL);
		} while (board[row][col] != '.');
		m_point.set_new_point(row, col);
		_score++;
	}
}

void get_new_pos(Point* (*board)[COL], Point** segments) {
	Point new_point; 
	new_point.m_row = segments[0]->m_row;
	new_point.m_col = segments[0]->m_col;

	if (segments[0]->m_direction == -1) {
		if (new_point.m_col <= 0) new_point.m_col = COL - 1;
		else new_point.m_col--;
	} else if (segments[0]->m_direction == 1) {
		if (new_point.m_col >= COL - 1) new_point.m_col = 0;
		else new_point.m_col++;
	} else if (segments[0]->m_direction == -2) {
		if (new_point.m_row <= 0) new_point.m_row = ROW - 1;
		else new_point.m_row--;
	} else if (segments[0]->m_direction == 2) {
		if (new_point.m_row >= ROW - 1) new_point.m_row = 0;
		else new_point.m_row++;
	}
	board[segments[0]->m_row][segments[0]->m_col] = nullptr;
	segments[0]->m_row = new_point.m_row;
	segments[0]->m_col = new_point.m_col;
	board[segments[0]->m_row][segments[0]->m_col] = segments[0];
}

bool Body::check_collision(Head &head) {
	for(int i = 0; i < m_body.size(); i++) {
		if(m_body[i].m_tail_pos.m_row != head.m_head.m_row) continue;
		if(m_body[i].m_tail_pos.m_col != head.m_head.m_col) continue;
		return true;
	}
	return false;
}

void Body::check_new_tail() {
	if(_score > m_body.size()) m_body.push_back(Tail{});
}

void Body::get_new_pos(Head &head) {
	if(m_body.empty()) return;
	m_body[0].m_previous_tail_pos.set_new_point(head.m_previous_head);
	for (int i = 1; i < m_body.size(); i++) {
		m_body[i].m_previous_tail_pos.set_new_point(m_body[i - 1].m_tail_pos);
	}
	for (int i = 0; i < m_body.size(); i++) {
		m_body[i].m_tail_pos.set_new_point(m_body[i].m_previous_tail_pos);
	}
}