#include <stdbool.h>
#include <math.h>
#include <cairo.h>

#include "x11.h"
#include "log.h"

#define EVEN(n) ((int)(n) - ((int)(n) % 2 != 0))

void draw(Window *win)
{
    double scale = window_get_scale(win);

    int screen_width, screen_height;
    window_get_screen_size(win, &screen_width, &screen_height);

    int width  = EVEN(round(screen_width * 0.98 * scale));
    int height = EVEN(round(screen_height * 0.02 * scale));

    cairo_surface_t *surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);

    cairo_t *cr = cairo_create(surface);
    cairo_set_fill_rule(cr, CAIRO_FILL_RULE_EVEN_ODD);
    cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);

	cairo_set_source_rgb(cr, 0.3, 0.3, 0.3);
	cairo_rectangle(cr, 0, 0, width, height);
	cairo_fill(cr);

    for (int i = 0; i < 9; i++)
    {
	    cairo_set_source_rgb(cr, 0.7, 0.7, 0.7);
	    cairo_rectangle(cr, height * i, 0, height, height);
	    cairo_fill(cr);

	    cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
        cairo_set_line_width(cr, 1 * scale);
	    cairo_rectangle(cr, height * i, 0, height, height);
	    cairo_stroke(cr);

        cairo_select_font_face(cr, "monospace", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_BOLD);
	    cairo_set_source_rgb(cr, 0.3, 0.3, 0.3);
        cairo_set_font_size(cr, 20.0);

        char btn[] = { '0' + i, '\0' };

        cairo_text_extents_t te;
        cairo_text_extents(cr, btn, &te);

        cairo_move_to(cr, (height * i) + (height / 2) - te.x_bearing - te.width / 2,
                          (height / 2) - te.y_bearing - te.height / 2);
        cairo_show_text(cr, btn);
    }


	cairo_destroy(cr);

    int x = EVEN((screen_width - width) / 2.0);
    int y = EVEN(screen_height * 0.005);

    // TODO: Move these somewhere else
    window_move(win, x, y);
    window_resize(win, width, height);

    window_paint_surface(win, surface, width, height);
    cairo_surface_destroy(surface);
}

// vim: ts=4 sw=4 et