//! Unified error handling for the core

use thiserror::Error;

/// Main error type for core operations
#[derive(Error, Debug)]
pub enum CoreError {
    #[error("Database error: {0}")]
    Database(#[from] sea_orm::DbErr),
    
    #[error("IO error: {0}")]
    Io(#[from] std::io::Error),
    
    #[error("File operation error: {0}")]
    FileOp(#[from] FileOpError),
    
    #[error("Not found: {0}")]
    NotFound(String),
    
    #[error("Invalid operation: {0}")]
    InvalidOperation(String),
    
    #[error("Other error: {0}")]
    Other(#[from] anyhow::Error),
}

/// Errors specific to file operations
#[derive(Error, Debug)]
pub enum FileOpError {
    #[error("Source not found: {0}")]
    SourceNotFound(String),
    
    #[error("Destination not found: {0}")]
    DestinationNotFound(String),
    
    #[error("Permission denied: {0}")]
    PermissionDenied(String),
    
    #[error("File exists: {0}")]
    FileExists(String),
    
    #[error("Not a directory: {0}")]
    NotADirectory(String),
    
    #[error("IO error: {0}")]
    Io(#[from] std::io::Error),
    
    #[error("Other: {0}")]
    Other(String),
}

impl From<&str> for FileOpError {
    fn from(s: &str) -> Self {
        FileOpError::Other(s.to_string())
    }
}

impl From<String> for FileOpError {
    fn from(s: String) -> Self {
        FileOpError::Other(s)
    }
}

/// Result type alias for core operations
pub type Result<T> = std::result::Result<T, CoreError>;