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use flex_error::{define_error, DisplayOnly, TraceError};
use std::io::Error as IoError;

use super::KeyType;
use crate::config::AddressType;

define_error! {
    Error {
        InvalidPublicKey
            [ TraceError<signature::Error> ]
            |_| { "invalid key: could not build public key from public key bytes" },

        KeyNotFound
            |_| { "key not found" },

        KeyAlreadyExist
            |_| { "key already exist" },

        InvalidMnemonic
            [ DisplayOnly<anyhow::Error> ]
            |_| { "invalid mnemonic" },

        Bip32KeyGenerationFailed
            { key_type: KeyType }
            [ TraceError<anyhow::Error> ]
            |e| { format!("cannot generate {} private key from BIP-32 seed", e.key_type) },

        OnlySecp256k1PublicKeySupported
            { key_type: String }
            |e| {
                format!("unsupported public key: {}. only secp256k1 pub keys are currently supported",
                    e.key_type)
            },

        EncodedPublicKey
            {
                key: String,
            }
            [ TraceError<serde_json::Error> ]
            |e| {
                format!("cannot deserialize the encoded public key {0}",
                    e.key)
            },

        Bech32Account
            [ TraceError<bech32::Error> ]
            |_| { "cannot generate bech32 account" },

        Bech32
            [ TraceError<bech32::Error> ]
            |_| { "bech32 error" },

        PublicKeyMismatch
             { keyfile: Vec<u8>, mnemonic: Vec<u8> }
            |_| { "mismatch between the public key in the key file and the public key in the mnemonic" },

        KeyFileEncode
            { file_path: String }
            [ TraceError<serde_json::Error> ]
            |e| {
                format!("error encoding key file at '{}'",
                    e.file_path)
            },

        Encode
            [ TraceError<serde_json::Error> ]
            |_| { "error encoding key" },

        KeyFileDecode
            { file_path: String }
            [ TraceError<serde_json::Error> ]
            |e| {
                format!("error decoding key file at '{}'",
                    e.file_path)
            },

        KeyFileIo
            {
                file_path: String,
                description: String,
            }
            [ TraceError<IoError> ]
            |e| {
                format!("I/O error on key file at '{}': {}",
                    e.file_path, e.description)
            },

        KeyFileNotFound
            { file_path: String }
            |e| {
                format!("cannot find key file at '{}'",
                    e.file_path)
            },

        HomeLocationUnavailable
            |_| { "home location is unavailable" },

        RemoveIoFail
            {
                file_path: String,
            }
            [ TraceError<IoError> ]
            |e| {
                format!("I/O error while removing key file at location '{}'",
                    e.file_path)
            },

        InvalidHdPath
            {
                path: String,
            }
            |e| {
                format!("invalid HD path: {0}", e.path)
            },

        AddressTypeNotFound
            {
                address: Vec<u8>,
                public_key: Vec<u8>,
            }
            |e| {
                format!("No address type found for address {:?} that matches the public key {:?}",
                        e.address,
                        e.public_key)
            },

        InvalidAddressLength
            {
                address: Vec<u8>,
                expected_length: usize,
            }
            |e| {
                format!("Length of address {:?} did not match expected length {}",
                        e.address,
                        e.expected_length)
            },


        Bs58Decode
            [ TraceError<bs58::decode::Error> ]
            |_| { "bs58 decode error" },

        UnsupportedAddressType
            {
                address_type: AddressType,
                key_type: KeyType,
            }
            |e| {
                format!("Unsupported address type {} for key type {}", e.address_type, e.key_type)
            },

        InvalidPublicKeyLength
            {
                got: usize,
                expected: usize
            }
            |e| {
                format!("Invalid public key length: expected {}, got {}", e.expected, e.got)
            }
    }
}