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use crate::Notification;
use crate::Request;
use std::fmt;

#[derive(Debug, Clone)]
pub struct ProtocolError(pub(crate) String);

impl fmt::Display for ProtocolError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        fmt::Display::fmt(&self.0, f)
    }
}

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

impl From<anyhow::Error> for ProtocolError {
    fn from(err: anyhow::Error) -> Self {
        Self(err.to_string())
    }
}

#[derive(Debug)]
pub enum ExtractError<T> {
    /// The extracted message was of a different method than expected.
    MethodMismatch(T),
    /// Failed to deserialize the message.
    JsonError {
        method: String,
        error: serde_json::Error,
    },
}

impl std::error::Error for ExtractError<Request> {}
impl fmt::Display for ExtractError<Request> {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            ExtractError::MethodMismatch(req) => {
                write!(f, "Method mismatch for request '{}'", req.method())
            }
            ExtractError::JsonError { method, error } => {
                write!(f, "Invalid request\nMethod: {method}\n error: {error}",)
            }
        }
    }
}

impl std::error::Error for ExtractError<Notification> {}
impl fmt::Display for ExtractError<Notification> {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            ExtractError::MethodMismatch(req) => {
                write!(f, "Method mismatch for notification '{}'", req.method())
            }
            ExtractError::JsonError { method, error } => {
                write!(f, "Invalid notification\nMethod: {method}\n error: {error}")
            }
        }
    }
}

#[derive(Clone, Copy, Debug)]
#[allow(unused)]
pub enum ErrorCode {
    ParseError = -32700,
    InvalidRequest = -32600,
    MethodNotFound = -32601,
    InvalidParams = -32602,
    InternalError = -32603,
    ServerErrorStart = -32099,
    ServerErrorEnd = -32000,
    ServerNotInitialized = -32002,
    RequestCanceled = -32800,
    ContentModified = -32801,
    ServerCancelled = -32802,
}