address 0.20.0-rc.2

use crate::parse_port;
use crate::{Domain, Endpoint, EndpointRef, InvalidAddress, ParseError, impl_parse};

impl_parse!(Endpoint, "Domain names are normalized to lowercase.");

impl TryFrom<&[u8]> for Endpoint {
    type Error = ParseError;

    /// Domain names are normalized to lowercase.
    fn try_from(endpoint: &[u8]) -> Result<Self, Self::Error> {
        match EndpointRef::try_from(endpoint) {
            Ok(endpoint) => Ok(endpoint.to_endpoint()),
            Err(error) => {
                // Lowercasing can only rescue a mixed-case domain; other failures keep the original error.
                if endpoint.iter().any(|b| b.is_ascii_uppercase())
                    && let Ok((domain, port)) = parse_port(endpoint)
                    && let Ok(domain) = Domain::try_from(domain)
                {
                    Ok(domain.to_endpoint(port))
                } else {
                    Err(error)
                }
            }
        }
    }
}

impl TryFrom<String> for Endpoint {
    type Error = InvalidAddress<String>;

    /// Domain names are normalized to lowercase.
    fn try_from(endpoint: String) -> Result<Self, Self::Error> {
        match EndpointRef::try_from(endpoint.as_bytes()) {
            Ok(endpoint_ref) => {
                let name_len: usize = endpoint_ref.domain().name().len();
                let port: u16 = endpoint_ref.port();
                let mut name: String = endpoint;
                name.truncate(name_len);
                Ok(unsafe { Domain::new_unchecked(name) }.to_endpoint(port))
            }
            Err(error) => {
                // Lowercasing can only rescue a mixed-case domain; other failures keep the original error.
                if let Ok((domain, port)) = parse_port(endpoint.as_bytes())
                    && Domain::is_valid_name(domain, true)
                {
                    let name_len: usize = domain.len();
                    let mut name: String = endpoint;
                    name.truncate(name_len);
                    name.make_ascii_lowercase();
                    Ok(unsafe { Domain::new_unchecked(name) }.to_endpoint(port))
                } else {
                    Err(InvalidAddress::new(endpoint, error))
                }
            }
        }
    }
}

impl TryFrom<Vec<u8>> for Endpoint {
    type Error = InvalidAddress<Vec<u8>>;

    /// Domain names are normalized to lowercase.
    fn try_from(endpoint: Vec<u8>) -> Result<Self, Self::Error> {
        match EndpointRef::try_from(endpoint.as_slice()) {
            Ok(endpoint_ref) => {
                let name_len: usize = endpoint_ref.domain().name().len();
                let port: u16 = endpoint_ref.port();
                let mut name: Vec<u8> = endpoint;
                name.truncate(name_len);
                let name: String = unsafe { String::from_utf8_unchecked(name) };
                Ok(unsafe { Domain::new_unchecked(name) }.to_endpoint(port))
            }
            Err(error) => {
                // Lowercasing can only rescue a mixed-case domain; other failures keep the original error.
                if let Ok((domain, port)) = parse_port(endpoint.as_slice())
                    && Domain::is_valid_name(domain, true)
                {
                    let name_len: usize = domain.len();
                    let mut name: Vec<u8> = endpoint;
                    name.truncate(name_len);
                    name.make_ascii_lowercase();
                    let name: String = unsafe { String::from_utf8_unchecked(name) };
                    Ok(unsafe { Domain::new_unchecked(name) }.to_endpoint(port))
                } else {
                    Err(InvalidAddress::new(endpoint, error))
                }
            }
        }
    }
}

#[cfg(test)]
mod tests {
    use crate::ParseError::{InvalidDomain, InvalidPort};
    use crate::{DomainRef, Endpoint, InvalidAddress, ParseError};
    use std::str::FromStr;

    #[test]
    fn from_str() {
        let test_cases: &[(&str, Result<Endpoint, ParseError>)] = &[
            ("", Err(InvalidPort)),
            ("localhost:", Err(InvalidPort)),
            ("localhost:xx", Err(InvalidPort)),
            (":80", Err(InvalidDomain)),
            ("[localhost]:80", Err(InvalidDomain)),
            ("localhost:80", Ok(DomainRef::LOCALHOST.to_domain().to_endpoint(80))),
            ("LocalHost:80", Ok(DomainRef::LOCALHOST.to_domain().to_endpoint(80))),
            ("Local_Host:80", Err(InvalidDomain)),
        ];

        for (input, expected) in test_cases {
            let result: Result<Endpoint, ParseError> = Endpoint::from_str(input);
            assert_eq!(result, *expected, "input={}", input);
        }
    }

    #[test]
    fn try_from_str() {
        let result: Result<Endpoint, ParseError> = Endpoint::try_from("localhost:80");
        let expected: Result<Endpoint, ParseError> = Ok(DomainRef::LOCALHOST.to_domain().to_endpoint(80));
        assert_eq!(result, expected);

        let result: Result<Endpoint, ParseError> = Endpoint::try_from("LocalHost:80");
        let expected: Result<Endpoint, ParseError> = Ok(DomainRef::LOCALHOST.to_domain().to_endpoint(80));
        assert_eq!(result, expected);
    }

    #[test]
    fn try_from_slice() {
        let result: Result<Endpoint, ParseError> = Endpoint::try_from("LocalHost:80".as_bytes());
        let expected: Result<Endpoint, ParseError> = Ok(DomainRef::LOCALHOST.to_domain().to_endpoint(80));
        assert_eq!(result, expected);

        let result: Result<Endpoint, ParseError> = Endpoint::try_from(b"\xFF:80".as_slice());
        let expected: Result<Endpoint, ParseError> = Err(InvalidDomain);
        assert_eq!(result, expected);
    }

    #[test]
    fn try_from_string() {
        let test_cases: &[(&str, Result<Endpoint, &str>)] = &[
            ("localhost:80", Ok(DomainRef::LOCALHOST.to_domain().to_endpoint(80))),
            ("LocalHost:80", Ok(DomainRef::LOCALHOST.to_domain().to_endpoint(80))),
            ("Local!Host:80", Err("Local!Host:80")),
        ];

        for (input, expected) in test_cases {
            let result: Result<Endpoint, InvalidAddress<String>> = Endpoint::try_from(input.to_string());
            let result: Result<Endpoint, String> = result.map_err(|e| e.into_value());
            assert_eq!(result, expected.clone().map_err(String::from), "input={}", input);
        }
    }

    #[test]
    fn try_from_vec() {
        let test_cases: &[(&str, Result<Endpoint, &str>)] = &[
            ("localhost:80", Ok(DomainRef::LOCALHOST.to_domain().to_endpoint(80))),
            ("LocalHost:80", Ok(DomainRef::LOCALHOST.to_domain().to_endpoint(80))),
            ("Local!Host:80", Err("Local!Host:80")),
        ];

        for (input, expected) in test_cases {
            let result: Result<Endpoint, InvalidAddress<Vec<u8>>> = Endpoint::try_from(Vec::from(*input));
            let result: Result<Endpoint, Vec<u8>> = result.map_err(|e| e.into_value());
            assert_eq!(result, expected.clone().map_err(Vec::from), "input={}", input);
        }
    }
}