/*
 * File:        rgbled.h
 * Description: RGB LED library
 * Author:      Jan Mrna
 * Date:        2021-10-11
 *
 *
 * Copyright (c) 2024 Veles Labs s.r.o.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */

#include "rgbled.h"

static rgbled_context_t *rgbled_context;
static uint8_t rgbled_intensity = RGBLED_MAX_INTENSITY; /* LED intensity from 0 (off) to RGBLED_MAX_INTENSITY (full power) */

int8_t rgbled_init(rgbled_context_t *context)
{
	if (context == NULL) {
		return RGBLED_ERROR;
	}
	rgbled_context = context;

	return RGBLED_OK;
}

int8_t rgbled_set_color(uint8_t R, uint8_t G, uint8_t B)
{
	uint8_t colors[3];
	uint8_t i;

	colors[0] = (uint32_t)R * rgbled_intensity / RGBLED_MAX_INTENSITY;
	colors[1] = (uint32_t)G * rgbled_intensity / RGBLED_MAX_INTENSITY;
	colors[2] = (uint32_t)B * rgbled_intensity / RGBLED_MAX_INTENSITY;
	for (i = 0; i < 3; i++) {
		if (colors[i] > RGBLED_PERIOD) {
			return RGBLED_ERROR;
		}
	}
	for (i = 0; i < 3; i++) {
		switch (rgbled_context->channel_array[i]) {
		case 1:
			LL_TIM_OC_SetCompareCH1(rgbled_context->timer_array[i], (uint32_t)(RGBLED_PERIOD - colors[i]));
			break;
		case 2:
			LL_TIM_OC_SetCompareCH2(rgbled_context->timer_array[i], (uint32_t)(RGBLED_PERIOD - colors[i]));
			break;
		case 3:
			LL_TIM_OC_SetCompareCH3(rgbled_context->timer_array[i], (uint32_t)(RGBLED_PERIOD - colors[i]));
			break;
		case 4:
			LL_TIM_OC_SetCompareCH4(rgbled_context->timer_array[i], (uint32_t)(RGBLED_PERIOD - colors[i]));
			break;
		default:
			return RGBLED_WRONG_CHANNEL;
		}
	}
	return RGBLED_OK;
}

int8_t rgbled_set_intensity(uint8_t intensity)
{
	if (intensity > RGBLED_MAX_INTENSITY) {
		return RGBLED_ERROR;
	}
	rgbled_intensity = intensity;

	return RGBLED_OK;
}

int8_t rgbled_get_intensity(uint8_t *intensity)
{
	if (intensity == NULL) {
		return RGBLED_ERROR;
	}
	*intensity = rgbled_intensity;

	return RGBLED_OK;
}

int8_t rgbled_off(void)
{
	rgbled_set_color(RGBLED_OFF);

	return RGBLED_OK;
}