#include <avr/io.h>
#include <stdlib.h> // for NULL

#include "lights.h"

#define N_LEDS 2
static unsigned char led_counters[N_LEDS];
static pattern_t *led_patterns[N_LEDS];

static pattern_t pattern_num[] = {
	{ 0, 0x5 },
	{ 1, 0x1 }, /* 10 */
	{ 0, 0x5 },
	{ 1, 0x1 }, /*  9 */
	{ 0, 0x5 },
	{ 1, 0x1 }, /*  8 */
	{ 0, 0x5 },
	{ 1, 0x1 }, /*  7 */
	{ 0, 0x5 },
	{ 1, 0x1 }, /*  6 */
	{ 0, 0x5 },
	{ 1, 0x1 }, /*  5 */
	{ 0, 0x5 },
	{ 1, 0x1 }, /*  4 */
	{ 0, 0x5 },
	{ 1, 0x1 }, /*  3 */
	{ 0, 0x5 },
	{ 1, 0x1 }, /*  2 */
	{ 0, 0x5 },
	{ 1, 0x1 }, /*  1 */
	{ 0, 0xF },
	PATTERN_END
};

static pattern_t pattern_invnum[] = {
	{ 1, 0x5 },
	{ 0, 0x1 }, /* 10 */
	{ 1, 0x5 },
	{ 0, 0x1 }, /*  9 */
	{ 1, 0x5 },
	{ 0, 0x1 }, /*  8 */
	{ 1, 0x5 },
	{ 0, 0x1 }, /*  7 */
	{ 1, 0x5 },
	{ 0, 0x1 }, /*  6 */
	{ 1, 0x5 },
	{ 0, 0x1 }, /*  5 */
	{ 1, 0x5 },
	{ 0, 0x1 }, /*  4 */
	{ 1, 0x5 },
	{ 0, 0x1 }, /*  3 */
	{ 1, 0x5 },
	{ 0, 0x1 }, /*  2 */
	{ 1, 0x5 },
	{ 0, 0x1 }, /*  1 */
	{ 1, 0xF },
	PATTERN_END
};

pattern_t off_pattern[] = {
	{ 0, 0x1 },
	PATTERN_END
};

pattern_t on1_pattern[] = {
	{ 1, 1 },
	{ 0, 2 },
	{ 1, 1 },
	{ 0, 8 },
	{ 1, 1 },
	{ 0, 8 },
	PATTERN_END
};

static void led_set_mode(unsigned char n, unsigned char mode)
{
	switch (n) {
	case 0: pwmled_on_off(mode); break;
	case 1: status_led_on_off(mode); break;
	}
}

void led_set_pattern(unsigned char n, pattern_t *pattern)
{
	if (!pattern)
		pattern = off_pattern;

	led_patterns[n] = pattern;

	led_counters[n] = pattern->duration;
	led_set_mode(n, pattern->mode);
}

void init_pattern()
{
	unsigned char i;

	for (i = 0; i < N_LEDS; i++)
		led_set_pattern(i, NULL);
}

pattern_t *number_pattern(unsigned char num, unsigned char inv)
{
	if (num >= 10)
		num = 10;

	if (inv) {
		return pattern_invnum
			+ sizeof(pattern_invnum)/sizeof(pattern_t)
			- 2 - 2*num;
	} else {
		return pattern_num
			+ sizeof(pattern_num)/sizeof(pattern_t)
			- 2 - 2*num;
	}
}

static pattern_t *pattern_select(unsigned char n)
{
	switch(n) {
	case 0: return pwmled_pattern_select();
	case 1: return status_led_pattern_select();
	default: return NULL;
	}
}

void pattern_reload()
{
	unsigned char i;

	for (i = 0; i < N_LEDS; i++)
		led_set_pattern(i, pattern_select(i));
}

static void inline pattern_finished(unsigned char n)
{
	led_patterns[n] = NULL;
	led_set_pattern(n, pattern_select(n));
}

void patterns_next_tick()
{
	unsigned char i;

	for (i = 0; i < N_LEDS; i++) {
		if (!led_patterns[i]) {
			pattern_finished(i);
			continue;
		}

		if (--led_counters[i] == 0) {
			pattern_t *p = led_patterns[i];
			p++;
			if (p->duration == 0) { // END
				/* Keep the last state, wait for others */
				pattern_finished(i);
				continue;
			}
			led_set_pattern(i, p);
		}

	}
}