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use derive_more::{Display, Error};

/// Error caused by the CLI program.
#[derive(Debug, Display, Error)]
#[non_exhaustive]
pub enum RuntimeError {
    /// When it fails to write JSON representation of
    /// [DataTreeReflection](crate::data_tree::Reflection) to stdout.
    #[display(fmt = "SerializationFailure: {_0}")]
    SerializationFailure(serde_json::Error),
    /// When it fails to read JSON representation of
    /// [DataTreeReflection](crate::data_tree::Reflection) from stdin.
    #[display(fmt = "DeserializationFailure: {_0}")]
    DeserializationFailure(serde_json::Error),
    /// When both `--json-input` and file names are both specified.
    #[display(fmt = "JsonInputArgConflict: Arguments exist alongside --json-input")]
    JsonInputArgConflict,
    /// When input JSON data is not a valid tree.
    #[display(fmt = "InvalidInputReflection: {_0}")]
    InvalidInputReflection(#[error(not(source))] String),
}