use std::fmt;

#[derive(Debug)]
pub enum PushError {
    /// 配置不合法：缺密钥、密钥不成对、subject 格式错误等。
    Config(String),
    /// 订阅数据本身坏掉了（endpoint/密钥解析失败），该订阅不可修复。
    Subscription(String),
    /// 推送服务或网络层的暂时性失败。
    Transport(String),
    Internal(String),
}

impl fmt::Display for PushError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            Self::Config(msg) => write!(f, "push config error: {msg}"),
            Self::Subscription(msg) => write!(f, "push subscription error: {msg}"),
            Self::Transport(msg) => write!(f, "push transport error: {msg}"),
            Self::Internal(msg) => write!(f, "push internal error: {msg}"),
        }
    }
}

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

impl From<web_push_native::Error> for PushError {
    fn from(error: web_push_native::Error) -> Self {
        Self::Internal(error.to_string())
    }
}