#include <rtthread.h>
#include <rthw.h>

#include "board.h"

#include "port.h"
#include "extint.h"

#include "sleep_timer.h"

void LED_Init(void)
{
	struct port_config config_port_pin;

	port_get_config_defaults(&config_port_pin);
	config_port_pin.direction  = PORT_PIN_DIR_INPUT;
	config_port_pin.input_pull = PORT_PIN_PULL_UP;
	port_pin_set_config(PIN_PA15, &config_port_pin);

	config_port_pin.direction  = PORT_PIN_DIR_OUTPUT;
	port_pin_set_config(PIN_PB30, &config_port_pin);
}

void LED_ON(void)
{
	port_pin_set_output_level(PIN_PB30, false);
}

void LED_OFF(void)
{
    port_pin_set_output_level(PIN_PB30, true);
}

void extint_detection_callback(void);

void configure_extint_channel(void)
{
//! [setup_1]
	struct extint_chan_conf config_extint_chan;
//! [setup_1]
//! [setup_2]
	extint_chan_get_config_defaults(&config_extint_chan);
//! [setup_2]

//! [setup_3]
	config_extint_chan.gpio_pin           = PIN_PA15A_EIC_EXTINT15;
	config_extint_chan.gpio_pin_mux       = MUX_PA15A_EIC_EXTINT15;
	config_extint_chan.gpio_pin_pull      = EXTINT_PULL_UP;
	config_extint_chan.detection_criteria = EXTINT_DETECT_BOTH;
//! [setup_3]
//! [setup_4]
	extint_chan_set_config(15, &config_extint_chan);
//! [setup_4]
}

void configure_extint_callbacks(void)
{
//! [setup_5]
	extint_register_callback(extint_detection_callback, 15, EXTINT_CALLBACK_TYPE_DETECT);
//! [setup_5]
//! [setup_6]
	extint_chan_enable_callback(15, EXTINT_CALLBACK_TYPE_DETECT);
//! [setup_6]
}

//! [setup_7]
void extint_detection_callback(void)
{
	bool pin_state = port_pin_get_input_level(PIN_PA15);
	port_pin_set_output_level(PIN_PB30, pin_state);
}

static struct rt_semaphore _rx_sem;

static rt_err_t _rx_ind(rt_device_t dev, rt_size_t size)
{
	return rt_sem_release(&_rx_sem);
}

void rt_init_thread_entry(void* parameter)
{
	rt_thread_t thread;
	rt_device_t dev;

	rt_kprintf("SYSTEM running at %uhz\n", SystemCoreClock);

	sleep_timer_init();
	// sleep_timer_start(1500);

	LED_Init();
	configure_extint_channel();
	configure_extint_callbacks();

	while (1)
	{
		rt_kprintf("init thread running tick:%u\n", rt_tick_get());
		rt_thread_delay(2*RT_TICK_PER_SECOND);
	}

#if 0
	dev = rt_device_find("uart3");
	if (dev != RT_NULL)
	{
		rt_sem_init(&_rx_sem, "rxsem", 0, RT_IPC_FLAG_FIFO);
		rt_device_set_rx_indicate(dev, _rx_ind);
		rt_device_open(dev, RT_DEVICE_OFLAG_RDWR | RT_DEVICE_FLAG_INT_RX);
	}

    while (1)
    {
		rt_size_t r_size;
		rt_uint8_t r_buf[1];
		// rt_kprintf("SAMD2xJ18A hello thread\n");
		// rt_thread_delay(RT_TICK_PER_SECOND);
		rt_sem_take(&_rx_sem, RT_WAITING_FOREVER);
		while ((r_size = rt_device_read(dev, 0, r_buf, 1)) > 0)
		{
			rt_device_write(dev, 0, r_buf, r_size);
			if (r_buf[0] == '\r')
			{
				r_buf[0] = '\n';
				rt_device_write(dev, 0, r_buf, r_size);
			}
		}
	}
#endif
}

int rt_application_init(void)
{
	rt_thread_t tid;

	tid = rt_thread_create("init", rt_init_thread_entry, RT_NULL,
                            512, RT_THREAD_PRIORITY_MAX / 3, 20);

	if (tid != RT_NULL)
		rt_thread_startup(tid);

	return 0;
}