#include <stdio.h>
#include <MLV/MLV_all.h>
#include "grid.h"
#include "snake.h"

void debug(char grid[NBL][NBC + 1])
{
    int i;
    for (i = 0; i < NBL; i++)
    {
        printf("%s\n", grid[i]);
    }
}

int compute_size(int w, int h)
{
    int size_width = w / NBC;
    int size_height = h / NBL;
    return (size_width < size_height) ? size_width : size_height;
}

void draw_grid(char grid[NBL][NBC + 1])
{
    int i, j;
    int window_width = MLV_get_window_width();
    int window_height = MLV_get_window_height();
    int cell_size = compute_size(window_width, window_height);

    MLV_draw_filled_rectangle(0, 0, window_width, window_height, MLV_COLOR_BLACK);

    for (i = 0; i < NBL; i++)
    {
        for (j = 0; j < NBC; j++)
        {
            int x = j * cell_size;
            int y = i * cell_size;

            switch (grid[i][j])
            {
            case WALL:
                MLV_draw_filled_rectangle(x, y, cell_size, cell_size, MLV_COLOR_BROWN);
                break;
            case EMPTY:
                MLV_draw_filled_rectangle(x, y, cell_size, cell_size, MLV_COLOR_WHITE);
                break;
            case FRUIT:
                MLV_draw_filled_rectangle(x, y, cell_size, cell_size, MLV_COLOR_RED);
                break;
            case SNAKE:
                MLV_draw_filled_rectangle(x, y, cell_size, cell_size, MLV_COLOR_GREEN);
                break;
            default:
                MLV_draw_filled_rectangle(x, y, cell_size, cell_size, MLV_COLOR_BLACK);
                break;
            }
        }
    }
}

void place_snake(char grid[NBL][NBC + 1], Snake *snake)
{
    int i;
    for (i = 0; i < SNAKE_SIZE; i++)
    {
        Coord part = snake->pos[i];
        grid[part.y][part.x] = 's';
    }
}

Element move_snake(Snake *snake, char grid[NBL][NBC + 1]) {
    Coord tail = snake->pos[SNAKE_SIZE - 1];
    Coord head;
    Element element_at_head;

    grid[tail.y][tail.x] = EMPTY;

    crawl(snake);

    head = snake->pos[0];
    element_at_head = grid[head.y][head.x];

    grid[head.y][head.x] = SNAKE;

    return element_at_head;
}