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#include <stdbool.h>
#include <avr/io.h>
#include <avr/wdt.h>
#include <avr/pgmspace.h>
#include <util/atomic.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#include "device.h"
#include "hardware/VREF.h"
#include "hardware/AFSK.h"
#include "hardware/Serial.h"
#include "hardware/LED.h"
#include "hardware/UserIO.h"
#include "hardware/SD.h"
#include "hardware/Crypto.h"
#include "hardware/Bluetooth.h"
#include "hardware/BME280.h"
#include "hardware/GPS.h"
#include "protocol/AX25.h"
#include "protocol/KISS.h"
#include "util/Config.h"
#include "util/time.h"
#include "util/FIFO.h"

uint8_t boot_vector = 0x00;
uint8_t OPTIBOOT_MCUSR __attribute__ ((section(".noinit")));
void resetFlagsInit(void) __attribute__ ((naked)) __attribute__ ((used)) __attribute__ ((section (".init0")));
void resetFlagsInit(void) {
__asm__ __volatile__ ("sts %0, r2\\n" : "=m" (OPTIBOOT_MCUSR) :);
}

Serial serial;
Afsk modem;
AX25Ctx AX25;

static void ax25_callback(struct AX25Ctx *ctx) {
kiss_messageCallback(ctx);
}

void system_check(void) {
// Check boot vector
if (OPTIBOOT_MCUSR & (1<<PORF)) {
boot_vector = START_FROM_POWERON;
} else if (OPTIBOOT_MCUSR & (1<<BORF)) {
boot_vector = START_FROM_BROWNOUT;
} else if (OPTIBOOT_MCUSR & (1<<WDRF)) {
boot_vector = START_FROM_BOOTLOADER;
} else {
printf(PSTR("Error, indeterminate boot vector %d\\r\\n"), OPTIBOOT_MCUSR);
printf(PSTR("System start has been halted\\r\\n"));
while (true) {
LED_TX_ON();
LED_COM_ON();
}
}

// If encryption was previously enabled, require
// it to be initialised to start system.
if (config_crypto_lock) {
if (!crypto_wait()) {
// If initialising crypto times out,
// halt system and display error signal
LED_indicate_error_crypto();
}
}

// TODO: Check GPS_REQUIRED and BLUETOOTH_REQUIRED
// here before giving green light.

// Give the green light if everything checks out
LED_STATUS_ON();
}

void init(void) {

sei();

serial_init(&serial);
stdout = &serial.uart0;
stdin = &serial.uart0;

config_init();

VREF_init();
LED_init();
AFSK_init(&modem);
ax25_init(&AX25, &modem, &modem.fd, ax25_callback);
kiss_init(&AX25, &modem, &serial);
sd_init();
bluetooth_init();
gps_init(&serial);
usrio_init();

if (config_sensors_enabled) {
if (config_sensor_bme280_enabled) bme280_init(config_sensor_bme280_cs_pin);
}

system_check();

if (config_user_jobs_enabled) user_init();
}

mtime_t sensor_poll_time = 0;
void sensor_jobs(void) {
if (rtc_milliseconds() > sensor_poll_time+config_sensor_interval_ms) {
if (config_sensor_bme280_enabled && bme280_ready) {
bme280_poll();
}

sensor_poll_time = rtc_milliseconds();
}
}

void user_init(void) {
// Place user-specified initialisation code here
}


void user_jobs(void) {
// Place user-specified tasks and jobs here
}


int main (void) {
init();

while (true) {
ax25_poll(&AX25);
kiss_poll();
kiss_csma();
sd_jobs();
gps_poll();

if (config_sensors_enabled) sensor_jobs();
if (config_user_jobs_enabled) user_jobs();
}

return(0);
}
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