/*
 * Copyright (c) 2016 Open-RnD Sp. z o.o.
 * Copyright (c) 2020 Nordic Semiconductor ASA
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include <zephyr.h>
#include <device.h>
#include <drivers/gpio.h>
#include <sys/util.h>
#include <sys/printk.h>
#include <inttypes.h>
#include <irq.h>


#define SLEEP_TIME_MS	1000


#define INT_NODE DT_PHANDLE(DT_PATH(zephyr_user), interrupt_gpios)

#define MY_DEV_IRQ  22       /* device uses IRQ 24 */
#define MY_DEV_PRIO  2       /* device uses interrupt priority 2 */
/* argument passed to my_isr(), in this case a pointer to the device */
#define MY_ISR_ARG  DEVICE_DT_GET(INT_NODE)
#define MY_IRQ_FLAGS 0       /* IRQ flags. Unused on non-x86 */

const struct device *int_dev = DEVICE_DT_GET(INT_NODE);

/*
 * Get button configuration from the devicetree sw0 alias. This is mandatory.
 */
#define SW0_NODE	DT_ALIAS(sw0)
#if !DT_NODE_HAS_STATUS(SW0_NODE, okay)
#error "Unsupported board: sw0 devicetree alias is not defined"
#endif
static const struct gpio_dt_spec button = GPIO_DT_SPEC_GET_OR(SW0_NODE, gpios,{0});
static struct gpio_callback button_cb_data;

static const struct gpio_dt_spec int_gen = GPIO_DT_SPEC_GET_BY_IDX(DT_PATH(zephyr_user), interrupt_gpios, 0);
static struct gpio_callback int_cb_data;

/*
 * The led0 devicetree alias is optional. If present, we'll use it
 * to turn on the LED whenever the button is pressed.
 */
static struct gpio_dt_spec led = GPIO_DT_SPEC_GET_OR(DT_ALIAS(led0), gpios, {0});


void button_pressed(const struct device *dev, struct gpio_callback *cb,
		    uint32_t pins)
{
	printk("Button pressed at %" PRIu32 "\n", k_cycle_get_32());
}

void interrupt_service(const struct device *dev, struct gpio_callback *cb,
		    uint32_t pins)
{
	printk("Button pressed at %" PRIu32 "\n", k_cycle_get_32());
}

/*void my_isr(void *arg)
{
   printk("Button ");
}*/

void main(void)
{
	int ret;

	/*if (!device_is_ready(int_dev)) {
		  printk("ADC device not found\n");
		return;
	}*/

	if (!device_is_ready(button.port)) {
		printk("Error: button device %s is not ready\n",
		       button.port->name);
		return;
	}

	ret = gpio_pin_configure_dt(&int_gen, GPIO_INPUT);
	//ret = gpio_pin_configure(int_dev, MY_DEV_IRQ, GPIO_INPUT);
	if (ret != 0) {
		printk("Error ");
		return;
	}
	ret = gpio_pin_interrupt_configure_dt(&int_gen, GPIO_INT_EDGE_TO_ACTIVE);
	//ret = gpio_pin_interrupt_configure(int_dev, MY_DEV_IRQ, GPIO_INT_EDGE_RISING);
	if (ret != 0) {
		printk("Error ");
		return;
	}


	ret = gpio_pin_configure_dt(&button, GPIO_INPUT);
	if (ret != 0) {
		printk("Error %d: failed to configure %s pin %d\n",
		       ret, button.port->name, button.pin);
		return;
	}

	ret = gpio_pin_interrupt_configure_dt(&button,
					      GPIO_INT_EDGE_TO_ACTIVE);
	if (ret != 0) {
		printk("Error %d: failed to configure interrupt on %s pin %d\n",
			ret, button.port->name, button.pin);
		return;
	}

	gpio_init_callback(&button_cb_data, button_pressed, BIT(button.pin));
	gpio_add_callback(button.port, &button_cb_data);
	printk("Set up button at %s pin %d\n", button.port->name, button.pin);

	gpio_init_callback(&int_cb_data, interrupt_service, BIT(int_gen.pin));
	gpio_add_callback(int_gen.port, &int_cb_data);
	printk("Set up button at %s pin %d\n", int_gen.port->name, int_gen.pin);

	if (led.port && !device_is_ready(led.port)) {
		printk("Error %d: LED device %s is not ready; ignoring it\n",
		       ret, led.port->name);
		led.port = NULL;
	}
	if (led.port) {
		ret = gpio_pin_configure_dt(&led, GPIO_OUTPUT);
		if (ret != 0) {
			printk("Error %d: failed to configure LED device %s pin %d\n",
			       ret, led.port->name, led.pin);
			led.port = NULL;
		} else {
			printk("Set up LED at %s pin %d\n", led.port->name, led.pin);
		}
	}
	
	//IRQ_CONNECT(MY_DEV_IRQ, MY_DEV_PRIO, my_isr, MY_ISR_ARG, MY_IRQ_FLAGS);
    //irq_enable(MY_DEV_IRQ);

	printk("Press the button\n");
	if (led.port) {
		while (1) {
			/* If we have an LED, match its state to the button's. */
			int val = gpio_pin_get_dt(&button);

			if (val >= 0) {
				gpio_pin_set_dt(&led, val);
			}
			k_msleep(SLEEP_TIME_MS);
		}
	}
}