// grid.cpp  definitions of the Grid class functions
#include "grid.h"
#include "gp142.h"

// constructor
Grid::Grid(GP142Display *display) {
	this->display = display;

	// set all rows of grid to empty
	for (int x=0; x<GRID_WIDTH; x++)
		for (int y=0; y<GRID_HEIGHT; y++)
			grid[x][y] = EMPTY_SQUARE;
}

// true if grid[x][y] is not empty
bool Grid::IsSet(int x, int y) const {
	return (grid[x][y] != EMPTY_SQUARE);
}


// draw the grid to the screen including 
// boundary box and occupied squares
void Grid::Draw() {

	// left side of grid
	display->drawRectangle(GRID_LEFT-5,GRID_BOTTOM,
						  GRID_LEFT-1,GRID_BOTTOM+GRID_HEIGHT*SQUARE_HEIGHT,
						  Red, FILL);

	// bottom of grid
	display->drawRectangle(GRID_LEFT-5,GRID_BOTTOM-1,
						  GRID_LEFT + GRID_WIDTH*SQUARE_WIDTH+5, GRID_BOTTOM-5,
						  Blue, FILL);

	// right side of grid
	display->drawRectangle(GRID_LEFT+GRID_WIDTH*SQUARE_WIDTH+1,GRID_BOTTOM,
						  GRID_LEFT+GRID_WIDTH*SQUARE_WIDTH+5,GRID_BOTTOM+GRID_HEIGHT*SQUARE_HEIGHT,
						  Red, FILL);
						  

	// all the grid squares
	for (int x=0; x<GRID_WIDTH; x++)
		for (int y=0; y<GRID_HEIGHT;y++)
			if (grid[x][y] != EMPTY_SQUARE)
				display->drawRectangle(GRID_LEFT+x*SQUARE_WIDTH,GRID_BOTTOM+y*SQUARE_HEIGHT,
									  GRID_LEFT+(x+1)*SQUARE_WIDTH, GRID_BOTTOM+(y+1)*SQUARE_HEIGHT,
									  grid[x][y],FILL);

}


// set the grid (x,y) to color
void Grid::Set(int x, int y, GP142Color color) {
	grid[x][y] = color;
}


// check for and remove all solid rows of squares
// if a solid row is found, all rows above it
// are moved down and the top row set to empty
void Grid::CheckRows() {
   // implementation needed
}