use thiserror::Error;

/// Core error types for the mailer system.
#[derive(Debug, Error)]
pub enum MailerError {
    #[error("invalid email address: {0}")]
    InvalidEmail(String),

    #[error("invalid email format: {0}")]
    InvalidFormat(String),

    #[error("missing required field: {0}")]
    MissingField(String),

    #[error("MIME encoding error: {0}")]
    MimeError(String),

    #[error("validation error: {0}")]
    ValidationError(String),

    #[error("parse error: {0}")]
    ParseError(String),

    #[error("IO error: {0}")]
    Io(#[from] std::io::Error),

    #[error("regex error: {0}")]
    Regex(#[from] regex::Error),
}

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