use std::fmt;

use crate::client;
use crate::state;

pub type Result<T> = std::result::Result<T, Error>;

#[derive(Debug, Clone)]
pub enum Error {
    Io(std::io::ErrorKind),

    /// VarInt was encoded in a non-minimal way
    PathNotFound,
    NonMinimalVarInt,

    /// Parsing And Encode/Decode errors
    ParseFailed(&'static str),
    ParseIntError,
    ParseBigIntError,
    ParseFloatError,
    FromHexError,
    UrlParseError,
    MalformedPacket,
    AddrParseError,
    Base58EncodeError(String),
    Base58DecodeError(String),
    Utf8Error,
    StrUtf8Error(String),
    TryIntoError,
    TryFromError,
    TryFromBigIntError,
    SerdeJsonError(String),
    TomlDeserializeError(String),
    TomlSerializeError(String),

    /// Contract
    BadVariableRefType,
    BadOperationType,
    BadConstraintType,
    InvalidParamName,
    InvalidParamType,
    MissingParams,
    VmError,
    BadContract,
    Groth16Error,
    PlonkError,
    OperationFailed,
    NoteDecryptionFailed,
    VerifyFailed,
    TreeFull,

    /// Service
    ServicesError(&'static str),
    ClientFailed(String),
    #[cfg(feature = "btc")]
    BtcFailed(String),
    #[cfg(feature = "sol")]
    SolFailed(String),
    #[cfg(feature = "eth")]
    EthFailed(String),
    BridgeError(String),
    ZmqError(String),

    /// Database/Sql errors
    RocksdbError(String),
    RusqliteError(String),
    SlabsStore(String),

    /// RPC errors
    JsonRpcError(String),
    NotSupportedNetwork,
    NotSupportedToken,
    TokenParseError,
    NetworkParseError,
    AsyncNativeTlsError,
    TungsteniteError,

    /// Network
    ConnectFailed,
    ConnectTimeout,
    ChannelStopped,
    ChannelTimeout,
    ServiceStopped,

    /// Util
    ConfigNotFound,
    KeypairPathNotFound,
    CashierKeysNotFound,
    SetLoggerError,
    AsyncChannelSenderError,
    AsyncChannelReceiverError,
}

impl std::error::Error for Error {}

impl fmt::Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter) -> std::fmt::Result {
        match *self {
            Error::PathNotFound => f.write_str("Cannot find home directory"),
            Error::Io(ref err) => write!(f, "io error:{:?}", err),
            Error::NonMinimalVarInt => f.write_str("non-minimal varint"),
            Error::ParseFailed(ref err) => write!(f, "parse failed: {}", err),
            Error::ParseIntError => f.write_str("Parse int error"),
            Error::ParseBigIntError => f.write_str("Parse big int error"),
            Error::ParseFloatError => f.write_str("Parse float error"),
            Error::UrlParseError => f.write_str("Failed to parse URL"),
            Error::FromHexError => f.write_str("Failed to convert from hex"),
            Error::AsyncChannelSenderError => f.write_str("Async_channel sender error"),
            Error::AsyncChannelReceiverError => f.write_str("Async_channel receiver error"),
            Error::AsyncNativeTlsError => f.write_str("Async_Native_TLS error"),
            Error::MalformedPacket => f.write_str("Malformed packet"),
            Error::AddrParseError => f.write_str("Unable to parse address"),
            Error::BadVariableRefType => f.write_str("Bad variable ref type byte"),
            Error::BadOperationType => f.write_str("Bad operation type byte"),
            Error::BadConstraintType => f.write_str("Bad constraint type byte"),
            Error::InvalidParamName => f.write_str("Invalid param name"),
            Error::InvalidParamType => f.write_str("Invalid param type"),
            Error::MissingParams => f.write_str("Missing params"),
            Error::VmError => f.write_str("VM error"),
            Error::BadContract => f.write_str("Contract is poorly defined"),
            Error::Groth16Error => f.write_str("Groth16 error"),
            Error::PlonkError => f.write_str("Plonk error"),
            Error::RusqliteError(ref err) => write!(f, "Rusqlite error {}", err),
            Error::OperationFailed => f.write_str("Operation failed"),
            Error::ConnectFailed => f.write_str("Connection failed"),
            Error::ConnectTimeout => f.write_str("Connection timed out"),
            Error::ChannelStopped => f.write_str("Channel stopped"),
            Error::ChannelTimeout => f.write_str("Channel timed out"),
            Error::ServiceStopped => f.write_str("Service stopped"),
            Error::Utf8Error => f.write_str("Malformed UTF8"),
            Error::StrUtf8Error(ref err) => write!(f, "Malformed UTF8: {}", err),
            Error::NoteDecryptionFailed => f.write_str("Unable to decrypt mint note"),
            Error::ServicesError(ref err) => write!(f, "Services error: {}", err),
            Error::ZmqError(ref err) => write!(f, "ZmqError: {}", err),
            Error::VerifyFailed => f.write_str("Verify failed"),
            Error::ClientFailed(ref err) => write!(f, "Client failed: {}", err),
            #[cfg(feature = "btc")]
            Error::BtcFailed(ref err) => write!(f, "Btc client failed: {}", err),
            #[cfg(feature = "sol")]
            Error::SolFailed(ref err) => write!(f, "Sol client failed: {}", err),
            #[cfg(feature = "eth")]
            Error::EthFailed(ref err) => write!(f, "Eth client failed: {}", err),
            Error::TryIntoError => f.write_str("TryInto error"),
            Error::TryFromError => f.write_str("TryFrom error"),
            Error::TryFromBigIntError => f.write_str("TryFromBigInt error"),
            Error::RocksdbError(ref err) => write!(f, "Rocksdb Error: {}", err),
            Error::SlabsStore(ref err) => write!(f, "SlabsStore Error: {}", err),
            Error::JsonRpcError(ref err) => write!(f, "JsonRpc Error: {}", err),
            Error::TreeFull => f.write_str("MerkleTree is full"),
            Error::NotSupportedNetwork => f.write_str("Not supported network"),
            Error::NotSupportedToken => f.write_str("Not supported token"),
            Error::BridgeError(ref err) => write!(f, "Bridge error: {}", err),
            Error::SerdeJsonError(ref err) => write!(f, "Json serialization error: {}", err),
            Error::TomlDeserializeError(ref err) => write!(f, "Toml parsing error: {}", err),
            Error::TomlSerializeError(ref err) => write!(f, "Toml parsing error: {}", err),
            Error::Base58EncodeError(ref err) => write!(f, "bs58 encode error: {}", err),
            Error::Base58DecodeError(ref err) => write!(f, "bs58 decode error: {}", err),
            Error::ConfigNotFound => f.write_str("No config file detected. Please create one."),
            Error::KeypairPathNotFound => f.write_str("No keypair file detected."),
            Error::CashierKeysNotFound => f.write_str("No cashier public keys detected."),
            Error::SetLoggerError => f.write_str("SetLoggerError"),
            Error::TokenParseError => f.write_str("Could not parse token parameter"),
            Error::TungsteniteError => f.write_str("TungsteniteError"),
            Error::NetworkParseError => f.write_str("Cannot parse network parameter"),
        }
    }
}

impl From<zeromq::ZmqError> for Error {
    fn from(err: zeromq::ZmqError) -> Error {
        Error::ZmqError(err.to_string())
    }
}

impl From<rocksdb::Error> for Error {
    fn from(err: rocksdb::Error) -> Error {
        Error::RocksdbError(err.to_string())
    }
}

impl From<serde_json::Error> for Error {
    fn from(err: serde_json::Error) -> Error {
        Error::SerdeJsonError(err.to_string())
    }
}

impl From<std::io::Error> for Error {
    fn from(err: std::io::Error) -> Error {
        Error::Io(err.kind())
    }
}

impl From<rusqlite::Error> for Error {
    fn from(err: rusqlite::Error) -> Error {
        Error::RusqliteError(err.to_string())
    }
}

impl<T> From<async_channel::SendError<T>> for Error {
    fn from(_err: async_channel::SendError<T>) -> Error {
        Error::AsyncChannelSenderError
    }
}

impl From<async_channel::RecvError> for Error {
    fn from(_err: async_channel::RecvError) -> Error {
        Error::AsyncChannelReceiverError
    }
}

impl From<async_native_tls::Error> for Error {
    fn from(_err: async_native_tls::Error) -> Error {
        Error::AsyncNativeTlsError
    }
}

impl From<std::net::AddrParseError> for Error {
    fn from(_err: std::net::AddrParseError) -> Error {
        Error::AddrParseError
    }
}

impl From<url::ParseError> for Error {
    fn from(_err: url::ParseError) -> Error {
        Error::UrlParseError
    }
}

impl From<hex::FromHexError> for Error {
    fn from(_err: hex::FromHexError) -> Error {
        Error::FromHexError
    }
}

impl From<std::num::ParseIntError> for Error {
    fn from(_err: std::num::ParseIntError) -> Error {
        Error::ParseIntError
    }
}

impl From<num_bigint::ParseBigIntError> for Error {
    fn from(_err: num_bigint::ParseBigIntError) -> Error {
        Error::ParseBigIntError
    }
}

impl From<num_bigint::TryFromBigIntError<num_bigint::BigUint>> for Error {
    fn from(_err: num_bigint::TryFromBigIntError<num_bigint::BigUint>) -> Error {
        Error::TryFromBigIntError
    }
}

impl From<std::num::ParseFloatError> for Error {
    fn from(_err: std::num::ParseFloatError) -> Error {
        Error::ParseFloatError
    }
}

impl From<std::string::FromUtf8Error> for Error {
    fn from(_err: std::string::FromUtf8Error) -> Error {
        Error::Utf8Error
    }
}

impl From<std::str::Utf8Error> for Error {
    fn from(err: std::str::Utf8Error) -> Error {
        Error::StrUtf8Error(err.to_string())
    }
}

impl From<state::VerifyFailed> for Error {
    fn from(_err: state::VerifyFailed) -> Error {
        Error::VerifyFailed
    }
}

impl From<client::ClientFailed> for Error {
    fn from(err: client::ClientFailed) -> Error {
        Error::ClientFailed(err.to_string())
    }
}

#[cfg(feature = "btc")]
impl From<crate::service::BtcFailed> for Error {
    fn from(err: crate::service::BtcFailed) -> Error {
        Error::BtcFailed(err.to_string())
    }
}

#[cfg(feature = "sol")]
impl From<crate::service::SolFailed> for Error {
    fn from(err: crate::service::SolFailed) -> Error {
        Error::SolFailed(err.to_string())
    }
}

#[cfg(feature = "eth")]
impl From<crate::service::EthFailed> for Error {
    fn from(err: crate::service::EthFailed) -> Error {
        Error::EthFailed(err.to_string())
    }
}

impl From<toml::de::Error> for Error {
    fn from(err: toml::de::Error) -> Error {
        Error::TomlDeserializeError(err.to_string())
    }
}

impl From<toml::ser::Error> for Error {
    fn from(err: toml::ser::Error) -> Error {
        Error::TomlSerializeError(err.to_string())
    }
}

impl From<bs58::encode::Error> for Error {
    fn from(err: bs58::encode::Error) -> Error {
        Error::Base58EncodeError(err.to_string())
    }
}

impl From<bs58::decode::Error> for Error {
    fn from(err: bs58::decode::Error) -> Error {
        Error::Base58DecodeError(err.to_string())
    }
}

impl From<log::SetLoggerError> for Error {
    fn from(_err: log::SetLoggerError) -> Error {
        Error::SetLoggerError
    }
}

impl From<tungstenite::Error> for Error {
    fn from(_err: tungstenite::Error) -> Error {
        Error::TungsteniteError
    }
}

impl From<halo2::plonk::Error> for Error {
    fn from(_err: halo2::plonk::Error) -> Error {
        Error::PlonkError
    }
}