//
//  WalletError.swift
//  OS Vault
//
//  Author: Simon-Pierre Boucher
//  Mail: contact@spboucher.ai
//

import Foundation

/// Typed errors for every service call. Messages never contain key material.
public enum WalletError: LocalizedError, Equatable {
    case noVault
    case vaultCorrupted
    case wrongPassword
    case invalidMnemonic
    case invalidAddress
    case insufficientETHForGas(needWei: String, haveWei: String)
    case insufficientTokenBalance
    case rpc(String)
    case signingFailed
    case internalError(String)

    public var errorDescription: String? {
        switch self {
        case .noVault:
            return "No wallet exists on this Mac yet."
        case .vaultCorrupted:
            return "The vault file is damaged and cannot be read."
        case .wrongPassword:
            return "Incorrect password."
        case .invalidMnemonic:
            return "This recovery phrase is not valid. Check the words and their order."
        case .invalidAddress:
            return "This is not a valid Ethereum address."
        case .insufficientETHForGas(let need, let have):
            return "Not enough of the chain's native coin to pay gas (need ~\(need), have \(have)). Gas is always paid in the native coin, never in stablecoins."
        case .insufficientTokenBalance:
            return "Amount exceeds your token balance."
        case .rpc(let message):
            return "Network error: \(message)"
        case .signingFailed:
            return "The transaction could not be signed."
        case .internalError(let message):
            return message
        }
    }
}