/*
 * Copyright (c) 2020 Siddharth Chandrasekaran <siddharth@embedjournal.com>
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include <zephyr.h>
#include <device.h>
#include <drivers/gpio.h>
#include <mgmt/osdp.h>

/* The devicetree node identifier for the "led0" alias. */
#define LED0_NODE DT_ALIAS(led0)

#if DT_NODE_HAS_STATUS(LED0_NODE, okay)
#define LED0         DT_GPIO_LABEL(LED0_NODE, gpios)
#define LED0_PIN     DT_GPIO_PIN(LED0_NODE, gpios)
#define FLAGS        DT_GPIO_FLAGS(LED0_NODE, gpios)
#else
#error "BOARD does not define a debug LED"
#define LED0         ""
#define LED0_PIN     0
#define FLAGS        0
#endif

#define SLEEP_TIME_MS                  (20)
#define CNT_PER_SEC                    (1000 / SLEEP_TIME_MS)
#define COMMAND_WAIT_TIME_SEC          (10)
#define COMMAND_WAIT_COUNT             (COMMAND_WAIT_TIME_SEC * CNT_PER_SEC)

enum osdp_pd_e {
	OSDP_PD_0,
	OSDP_PD_SENTINEL,
};

int key_press_callback(int pd, uint8_t key)
{
	printk("CP PD[%d] key press - data: 0x%02x\n", pd, key);
	return 0;
}

int card_read_callback(int pd, int format, uint8_t *data, int len)
{
	int i;

	printk("CP PD[%d] card read - fmt: %d len: %d card_data: [ ",
	       pd, format, len);

	for (i = 0; i < len; i++) {
		printk("0x%02x ", data[i]);
	}

	printk("]\n");
	return 0;
}

void main(void)
{
	int ret, led_state;
	uint32_t cnt = 0;
	const struct device *dev;
	struct osdp_cmd pulse_output = {
		.id = OSDP_CMD_OUTPUT,
		.output.output_no = 0,     /* First output */
		.output.control_code = 5,  /* Temporarily turn on output */
		.output.timer_count = 10,  /* Timer: 10 * 100ms = 1 second */
	};

	dev = device_get_binding(LED0);
	if (dev == NULL) {
		printk("Failed to get LED0 binding\n");
		return;
	}

	ret = gpio_pin_configure(dev, LED0_PIN, GPIO_OUTPUT_ACTIVE | FLAGS);
	if (ret < 0) {
		printk("Failed to configure gpio pin\n");
		return;
	}

	osdp_cp_set_callback_key_press(key_press_callback);
	osdp_cp_set_callback_card_read(card_read_callback);

	led_state = 0;
	while (1) {
		if ((cnt & 0x7f) == 0x7f) {
			/* show a sign of life */
			led_state = !led_state;
		}
		if ((cnt % COMMAND_WAIT_COUNT) == 0) {
			osdp_cp_send_command(OSDP_PD_0, &pulse_output);
		}
		gpio_pin_set(dev, LED0_PIN, led_state);
		k_msleep(SLEEP_TIME_MS);
		cnt++;
	}
}