use axum::http::StatusCode;
use axum::response::{IntoResponse, Response};
use serde_json::json;

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

#[derive(Debug, thiserror::Error)]
pub enum AppError {
    #[error("Not found: {0}")]
    NotFound(String),

    #[error("Unauthorized: {0}")]
    #[allow(dead_code)]
    Unauthorized(String),

    #[error("Bad request: {0}")]
    BadRequest(String),

    #[error("Forbidden")]
    Forbidden,

    #[error("Database error: {0}")]
    Database(#[from] sqlx::Error),

    #[error("S3 error: {0}")]
    S3(String),

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

impl IntoResponse for AppError {
    fn into_response(self) -> Response {
        let (status, message) = match &self {
            AppError::NotFound(msg) => (StatusCode::NOT_FOUND, msg.clone()),
            AppError::Unauthorized(msg) => (StatusCode::UNAUTHORIZED, msg.clone()),
            AppError::BadRequest(msg) => (StatusCode::BAD_REQUEST, msg.clone()),
            AppError::Forbidden => (StatusCode::FORBIDDEN, "Forbidden".to_string()),
            AppError::Database(e) => {
                tracing::error!("Database error: {e}");
                (
                    StatusCode::INTERNAL_SERVER_ERROR,
                    "Database error".to_string(),
                )
            }
            AppError::S3(msg) => {
                tracing::error!("S3 error: {msg}");
                (StatusCode::INTERNAL_SERVER_ERROR, "Storage error".to_string())
            }
            AppError::Internal(msg) => {
                tracing::error!("Internal error: {msg}");
                (
                    StatusCode::INTERNAL_SERVER_ERROR,
                    "Internal error".to_string(),
                )
            }
        };

        let body = axum::Json(json!({ "error": message }));
        (status, body).into_response()
    }
}