use hex::FromHexError;
use protocols::user_discovery::error::UserDiscoveryError;
use scrypt::errors::{InvalidOutputLen, InvalidParams};
use thiserror::Error;
use zip::result::ZipError;

pub type Result<T> = core::result::Result<T, TwonlyError>;

#[derive(Error, Debug)]
pub enum TwonlyError {
    #[error("global twonly is not initialized")]
    Initialization,

    #[error("Tried to access the wrong context")]
    WrongContext,

    #[error("init_flutter_callbacks was not called")]
    MissingCallbackInitialization,

    #[error("Could not find the given database")]
    DatabaseNotFound,

    #[error("main_key could not be loaded from the key_chain")]
    MissingMainKey,

    #[error("{0}")]
    UserDiscoveryError(#[from] UserDiscoveryError),

    #[error("Error in dart callback")]
    DartError,

    #[error(
        "Storage error: database exists but master key could not be loaded from secure storage"
    )]
    SecureStorageError,

    #[error("{0}")]
    SqliteError(#[from] sqlx::Error),

    #[error("{0}")]
    Generic(String),

    #[error("{0}")]
    IoError(#[from] std::io::Error),

    #[error("{0}")]
    ZipError(#[from] ZipError),

    #[error("{0}")]
    Walkdir(#[from] walkdir::Error),

    #[error("{0}")]
    Postcard(#[from] postcard::Error),

    #[error("{0}")]
    HexError(#[from] FromHexError),

    #[error("{0}")]
    InvalidParams(#[from] InvalidParams),
    #[error("{0}")]
    InvalidOutputLen(#[from] InvalidOutputLen),
    #[error("AES-GCM error")]
    AesGcm,
}

impl From<String> for TwonlyError {
    fn from(error: String) -> Self {
        TwonlyError::Generic(error)
    }
}

impl From<TwonlyError> for UserDiscoveryError {
    fn from(error: TwonlyError) -> Self {
        UserDiscoveryError::Store(error.to_string())
    }
}

impl From<aes_gcm::Error> for TwonlyError {
    fn from(_: aes_gcm::Error) -> Self {
        TwonlyError::AesGcm
    }
}