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use thiserror::Error;

/// Results from parsing a uasset
pub type Result<T> = std::result::Result<T, Error>;

/// Errors from parsing an asset
#[derive(Error, Debug)]
pub enum Error {
    #[error("data is not a uasset")]
    InvalidFile,
    #[error("asset has unsupported legacy version value {0:?}")]
    UnsupportedVersion(i32),
    #[error("asset has unsupported UE4 version value {0:?}")]
    UnsupportedUE4Version(i32),
    #[error("asset has unsupported UE5 version value {0:?}")]
    UnsupportedUE5Version(i32),
    #[error("asset saved without asset version information")]
    UnversionedAsset,
    #[error("failed to parse data: {0:?}")]
    ParseFailure(binread::Error),
    #[error("failed to read or seek stream: {0:?}")]
    Io(std::io::Error),
    #[error("failed to parse string in asset: {0:?}")]
    InvalidString(std::string::FromUtf8Error),
}

impl From<binread::Error> for Error {
    fn from(error: binread::Error) -> Self {
        Error::ParseFailure(error)
    }
}

impl From<std::io::Error> for Error {
    fn from(error: std::io::Error) -> Self {
        Error::Io(error)
    }
}

/// Error when attempting to resolve an index
#[derive(Error, Debug)]
#[error("invalid name index in asset: {0:?}")]
pub struct InvalidNameIndexError(pub u32);