use core::fmt;

use libboard_zynq::smoltcp::wire::{EthernetAddress, IpAddress};

use super::Config;

pub struct NetAddresses {
    pub hardware_addr: EthernetAddress,
    pub ipv4_addr: IpAddress,
    #[cfg(feature = "ipv6")]
    pub ipv6_ll_addr: IpAddress,
    #[cfg(feature = "ipv6")]
    pub ipv6_addr: Option<IpAddress>
}

impl fmt::Display for NetAddresses {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "MAC={} IPv4={} ",
            self.hardware_addr, self.ipv4_addr)?;

        #[cfg(feature = "ipv6")]
        {
            write!(f, "IPv6-LL={}", self.ipv6_ll_addr)?;
            match self.ipv6_addr {
                Some(addr) => write!(f, " {}", addr)?,
                None => write!(f, " IPv6: no configured address")?
            }
        }
        Ok(())
    }
}

#[cfg(feature = "target_kasli_soc")]
fn get_address_from_eeprom() -> EthernetAddress {
    use libboard_zynq::i2c::{I2c, eeprom};

    let mut i2c = I2c::i2c0();
    i2c.init().unwrap();
    let mut eeprom = eeprom::EEPROM::new(&mut i2c, 16);
    let address = eeprom.read_eui48().unwrap_or([0x02, 0x00, 0x00, 0x00, 0x00, 0x56]);

    EthernetAddress(address)
}

pub fn get_addresses(cfg: &Config) -> NetAddresses {
    #[cfg(feature = "target_zc706")]
    let mut hardware_addr = EthernetAddress([0x02, 0x00, 0x00, 0x00, 0x00, 0x52]);
    #[cfg(feature = "target_zc706")]
    let mut ipv4_addr = IpAddress::v4(192, 168, 1, 52);
    #[cfg(feature = "target_coraz7")]
    let mut hardware_addr = EthernetAddress([0x02, 0x00, 0x00, 0x00, 0x00, 0x54]);
    #[cfg(feature = "target_coraz7")]
    let mut ipv4_addr = IpAddress::v4(192, 168, 1, 54);
    #[cfg(feature = "target_redpitaya")]
    let mut hardware_addr = EthernetAddress([0x02, 0x00, 0x00, 0x00, 0x00, 0x55]);
    #[cfg(feature = "target_redpitaya")]
    let mut ipv4_addr = IpAddress::v4(192, 168, 1, 55);
    #[cfg(feature = "target_kasli_soc")]
    let mut hardware_addr = get_address_from_eeprom();
    #[cfg(feature = "target_kasli_soc")]
    let mut ipv4_addr = IpAddress::v4(192, 168, 1, 56);
    #[cfg(feature = "target_ebaz4205")]
    let mut hardware_addr = EthernetAddress([0x02, 0x00, 0x00, 0x00, 0x00, 0x57]);
    #[cfg(feature = "target_ebaz4205")]
    let mut ipv4_addr = IpAddress::v4(192, 168, 1, 57);

    if let Ok(Ok(addr)) = cfg.read_str("mac").map(|s| s.parse()) {
        hardware_addr = addr;
    }
    if let Ok(Ok(addr)) = cfg.read_str("ip").map(|s| s.parse()) {
        ipv4_addr = addr;
    }
    #[cfg(feature = "ipv6")]
    let ipv6_addr = cfg.read_str("ip6").ok().and_then(|s| s.parse().ok());

    #[cfg(feature = "ipv6")]
    let ipv6_ll_addr = IpAddress::v6(
        0xfe80, 0x0000, 0x0000, 0x0000,
        (((hardware_addr.0[0] ^ 0x02) as u16) << 8) | (hardware_addr.0[1] as u16),
        ((hardware_addr.0[2] as u16) << 8) | 0x00ff,
        0xfe00 | (hardware_addr.0[3] as u16),
        ((hardware_addr.0[4] as u16) << 8) | (hardware_addr.0[5] as u16));

    NetAddresses {
        hardware_addr,
        ipv4_addr,
        #[cfg(feature = "ipv6")]
        ipv6_ll_addr,
        #[cfg(feature = "ipv6")]
        ipv6_addr
    }
}