#include "PathfindingContext.h"
#include "Museum.h"
#include "NullTileBehavior.h"

using namespace std;

PathfindingContext::PathfindingContext(Museum & m) : museum(m) {}

void PathfindingContext::set_start(const pair<int, int> & point) {
	if (!this->valid_point(point)) return;
	this->start_point = point;
}

void PathfindingContext::set_end(const pair<int, int> & point) {
	if (!this->valid_point(point)) return;
	this->end_point = point;
}

bool PathfindingContext::valid_point(const std::pair<int, int> & point) {
	// check if out of bounds
	Canvas & canvas = this->museum.canvas;
	if (point.first < 0) return false;
	if (point.second < 0) return false;
	if (point.first >= canvas.data.columns) return false;
	if (point.second >= canvas.data.rows) return false;

	// check if square is empty (has null behavior)
	Tile & tile = canvas.get_tile(point.first, point.second);
	TileBehavior * behavior = tile.behavior.get();
	if (dynamic_cast<NullTileBehavior *>(behavior) != nullptr) return false;

	return true;
}