#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include <wiringPi.h>
#include "spilcd.h"
#include "spilcd_gfx.h"
#include "spilcd_font.h"

uint8 random_color_r(int seed);
uint8 random_color_g(int seed);
uint8 random_color_b(int seed);
inline uint8 random_color_r(int seed) { return seed % (256 / 7) * 7; }
inline uint8 random_color_g(int seed) { return seed % (256 / 13) * 13; }
inline uint8 random_color_b(int seed) { return seed % (256 / 23) * 23; }

int main(int argc, char *argv[])
{
	setbuf(stdout, NULL);
	srand(time(NULL));

	wiringPiSetup();

	lcd_t* lcd = lcd_init(40000000, 1, 10, 7, 8);

	printf("Fill display...");
	printf("blue...");
	lcd_fillScreen(lcd, 0, 70, 160);
	printf("...waiting 1 second...");
	sleep(1);
	printf("black...");
	lcd_fillScreen(lcd, 0, 0, 0);
	printf("DONE\n");

	printf("...waiting 1 second...\n");
	sleep(1);

	printf("Points...");
	for (int i = 1; i < 2000; i++) {
		int r = rand();
		lcd_drawPixel(lcd, r % 128, i % 160,
				random_color_r(i),
				random_color_g(i),
				random_color_b(i));
	}
	printf("DONE\n");

	printf("...waiting 1 second...\n");
	sleep(1);

	printf("Regions...");
	int w = 15;
	int h = 20;
	for (int i = 1; i < 200; i++) {
		int x = rand() % (128 - w);
		int y = rand() % (160 - h);
		lcd_setWindow(lcd, x, y, x + w - 1, y + h - 1);
		uint8 r = rand();
		uint8 g = rand();
		uint8 b = rand();
		for (int p = 0; p < w*h; p++) {
			lcd_pushPixel(lcd, r * p / (w*h), g * (w*h-p) / (w*h), b);
		}
	}
	printf("DONE\n");

	printf("...waiting 1 second...\n");
	sleep(1);

	printf("Rectangles...");
	lcd_fillScreen(lcd, 0, 0, 0);
	lcd_fillRect(lcd, 30, 10, 10, 10, 0, 255, 255);
	lcd_fillRect(lcd, 30, 30, 10, 10, 255, 255, 0);
	printf("DONE\n");

	printf("...waiting 1 second...\n");
	sleep(1);

	printf("Text...");
	lcd_fillScreen(lcd, 0, 0, 0);
	lcd_drawChar(lcd, 10, 90, 'A', 255, 0, 0);
	lcd_drawText(lcd, 10, 50, "Hello, world!", 0, 255, 0);
	lcd_drawChar(lcd, 10, 100, 'Z', 0, 0, 255);
	printf("DONE\n");

	printf("...waiting 2 seconds...\n");
	sleep(2);

	printf("Pulsing color...");
	for (int i = 0; i < 256; i++) {
		lcd_fillScreen(lcd,
			random_color_r(i),
			random_color_g(i),
			random_color_b(i));
	}
	printf("DONE\n");
	
	printf("...waiting 2 seconds before shutdown...\n");
	sleep(2);
	printf("Terminating...\n");
	lcd_fillScreen(lcd, 0, 0, 0);
	lcd_deinit(lcd);
	printf("DONE\n");
	
	return 0;
}