use axum::http::StatusCode;
use axum::response::{IntoResponse, Response};
use crate::models::ErrorResponse;

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

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

    #[error("Asset is corrupted: {0}")]
    Corrupted(String),

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

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

    #[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::BadRequest(msg) => (StatusCode::BAD_REQUEST, msg.clone()),
            AppError::Corrupted(msg) => (StatusCode::INTERNAL_SERVER_ERROR, msg.clone()),
            AppError::Database(e) => (StatusCode::INTERNAL_SERVER_ERROR, e.to_string()),
            AppError::Io(e) => (StatusCode::INTERNAL_SERVER_ERROR, e.to_string()),
            AppError::Internal(msg) => (StatusCode::INTERNAL_SERVER_ERROR, msg.clone()),
        };

        tracing::error!(%status, error = %message, "request error");

        let body = serde_json::to_string(&ErrorResponse::new(message)).unwrap_or_default();
        (status, [(axum::http::header::CONTENT_TYPE, "application/json")], body).into_response()
    }
}