use bytes::Bytes;
use errors::*;
use ser::packet::DnsPacketData;
use ser::text::{DnsTextData, DnsTextFormatter, DnsTextContext, next_field};
use std::fmt;
use std::io::Cursor;

/// timestamp in seconds since epoch (ignoring leap seconds)
///
/// Is expected to wrap around.
#[derive(Clone, PartialEq, Eq, Debug)]
pub struct Time(u32);

impl DnsPacketData for Time {
	fn deserialize(data: &mut Cursor<Bytes>) -> Result<Self> {
		Ok(Time(DnsPacketData::deserialize(data)?))
	}
}

impl DnsTextData for Time {
	fn dns_parse(_context: &DnsTextContext, data: &mut &str) -> ::errors::Result<Self> {
		let field = next_field(data)?;
		let epoch = field.parse::<u32>();
		if field.len() == 14 && epoch.is_err() {
			unimplemented!()
		} else {
			Ok(Time(epoch?))
		}
	}

	fn dns_format(&self, f: &mut DnsTextFormatter) -> fmt::Result {
		write!(f, "{}", self.0)
	}
}