#include <stm32f4xx_hal.h>

#include "lwip/init.h"
#include "lwip/netif.h"
#include "lwip/tcpip.h"
#include "lwip/dhcp.h"
#include "lwip/api.h"
#include "lwip/opt.h"
#include "lwip/timeouts.h"
#include "netif/etharp.h"
#include "lwip/apps/sntp.h"
#include "lwip/apps/sntp_opts.h"

#include "ethernetif.h"

#include "NetworkDefaults.h"

static struct netif gnetif;

static void StartDhcp(void);
static void NetworkConfig(void);
static void PrintIP(void);

// Bring up all networking items
void NetworkingInit(void)
{
    // Bring up the network stack
    lwip_init();

    // Bring up the network link
    NetworkConfig();

    // Start DHCP, we'll start other services will start when we have an IP
    StartDhcp();
}

void NetworkingUpdate(void)
{
    // Set link state
    //ethernetif_check_link_state(&gnetif);

    // Attempt to process ethernet frames
    ethernetif_input(&gnetif);

    // Refresh all timers
    sys_check_timeouts();

    //PrintIP();

    // If we don't have an IP or the link is down, quit now
    if(gnetif.ip_addr.addr == 0)
    {
        return;
    }

}

void NetworkingShutdown(void)
{
    dhcp_stop(&gnetif);
}

static void StartDhcp(void)
{
    // Zero out IP, netmask, and gateway
    ip_addr_set_zero_ip4(&gnetif.ip_addr);
    ip_addr_set_zero_ip4(&gnetif.netmask);
    ip_addr_set_zero_ip4(&gnetif.gw);

    // Start LwIP DHCP
    dhcp_start(&gnetif);

    printf("DHCP start\r\n");
}

// Attempt to get an address from DHCP
static void PrintIP(void)
{
    printf("IP address: %d.%d.%d.%d\r\n", (uint8_t)gnetif.ip_addr.addr, ((uint8_t)gnetif.ip_addr.addr >> 8), ((uint8_t)gnetif.ip_addr.addr >> 16), ((uint8_t)gnetif.ip_addr.addr >> 24));
}

void SetRtcFromNtpTimestamp(const uint32_t seconds, const uint32_t uSeconds)
{
    printf("Trying to set to %lu %lu\r\n", seconds, uSeconds);
}

void GetRtcTimestamp(uint32_t* seconds, uint32_t* uSeconds)
{
}

// Configure the network
static void NetworkConfig(void)
{
    ip_addr_t ipaddr;
    ip_addr_t netmask;
    ip_addr_t gw;

    // Start with settings zero'd for DHCP
    ip_addr_set_zero_ip4(&ipaddr);
    ip_addr_set_zero_ip4(&netmask);
    ip_addr_set_zero_ip4(&gw);

    /*IP_ADDR4(&ipaddr, 192, 168, 1, 50);
    IP_ADDR4(&netmask, 255, 255, 255, 0);
    IP_ADDR4(&gw, 192, 168, 1, 1);*/

    // Add the network interface
    netif_add(&gnetif, &ipaddr, &netmask, &gw, NULL, &ethernetif_init, &ethernet_input);

    // Registers the default network interface
    netif_set_default(&gnetif);
}