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use std::fmt::Display;
use std::string::FromUtf8Error;
use std::{fmt, io};
use std::net::AddrParseError;
use std::time::Duration;
use crate::{MAX_ENTRY_LENGTH, MAX_PAYLOAD_LENGTH};
pub enum WhereError {
EncodeDecodeError(EncodeDecodeError),
IOError(io::Error),
TimedOut(String, String, usize, Duration),
CannotParseAddress(AddrParseError)
}
pub enum EncodeDecodeError {
InvalidEntryLength(usize),
InvalidPayloadLength(usize),
BadMagic([u8; 4]),
IncorrectEntryCount,
StringSizeLimitExceeded(u32, usize),
StringDecodeError(FromUtf8Error),
NonbinaryBoolean,
EmptyRemote,
IOErrorWhileTranscoding(io::Error)
}
pub type WhereResult<T> = Result<T, WhereError>;
pub type EncodeDecodeResult<T> = Result<T, EncodeDecodeError>;
impl From<io::Error> for WhereError {
fn from(value: io::Error) -> Self {
Self::IOError(value)
}
}
impl From<EncodeDecodeError> for WhereError {
fn from(value: EncodeDecodeError) -> Self {
Self::EncodeDecodeError(value)
}
}
impl From<FromUtf8Error> for WhereError {
fn from(value: FromUtf8Error) -> Self {
Self::EncodeDecodeError(EncodeDecodeError::StringDecodeError(value))
}
}
impl From<io::Error> for EncodeDecodeError {
fn from(value: io::Error) -> Self {
Self::IOErrorWhileTranscoding(value)
}
}
impl From<FromUtf8Error> for EncodeDecodeError {
fn from (value: FromUtf8Error) -> Self {
Self::StringDecodeError(value)
}
}
impl From<AddrParseError> for WhereError {
fn from (value: AddrParseError) -> Self {
Self::CannotParseAddress(value)
}
}
impl Display for EncodeDecodeError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
Self::InvalidEntryLength(s) => write!(f, "Invalid entry length: {s} but maximum is {MAX_ENTRY_LENGTH}"),
Self::InvalidPayloadLength(s) => write!(f, "Invalid full payload length: {s} but maximum is {MAX_PAYLOAD_LENGTH}"),
Self::BadMagic(m) => write!(f, "Invalid packet magic ({}), possible corruption or invalid server", String::from_utf8_lossy(m)),
Self::IncorrectEntryCount => write!(f, "Invalid amount of entries decoded"),
Self::StringDecodeError(e) => write!(f, "String decoding error: {e}"),
Self::StringSizeLimitExceeded(curr, max) => write!(f, "Exceeded length limit for payload string ({curr} > {max})"),
Self::NonbinaryBoolean => write!(f, "Boolean value is not 0 or 1"),
Self::EmptyRemote => write!(f, "Remote tag set but no remote host is present"),
Self::IOErrorWhileTranscoding(e) => write!(f, "Input/output error while encoding/decoding: {e}"),
}
}
}
impl Display for WhereError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
Self::EncodeDecodeError(e) => write!(f, "Encode/decode error: {e}"),
Self::IOError(e) => write!(f, "Input/output error: {e}"),
Self::TimedOut(server, address, max_retry, timeout) => write!(f, "Timed out waiting for data from {server} ({address}) after {max_retry} attempts every {} ms", timeout.as_millis()),
Self::CannotParseAddress(e) => write!(f, "Unable to parse server address: {e}")
}
}
}
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