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

#[derive(Error, Debug)]
pub enum AppError {
    #[error("Database error: {0}")]
    Database(#[from] sea_orm::DbErr),

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

    #[error("Not found: {0}")]
    NotFound(String),

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

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

    #[error("Network error: {0}")]
    Network(#[from] reqwest::Error),

    #[error("Invalid request: {0}")]
    InvalidRequest(String),
}

impl IntoResponse for AppError {
    fn into_response(self) -> Response {
        let (status, error_message) = match self {
            AppError::Database(err) => (StatusCode::INTERNAL_SERVER_ERROR, err.to_string()),
            AppError::Config(err) => (StatusCode::INTERNAL_SERVER_ERROR, err),
            AppError::NotFound(err) => (StatusCode::NOT_FOUND, err),
            AppError::Unauthorized(err) => (StatusCode::UNAUTHORIZED, err),
            AppError::Internal(err) => (StatusCode::INTERNAL_SERVER_ERROR, err),
            AppError::Network(err) => (StatusCode::BAD_GATEWAY, err.to_string()),
            AppError::InvalidRequest(err) => (StatusCode::BAD_REQUEST, err),
        };

        let body = Json(json!({
            "error": error_message,
        }));

        (status, body).into_response()
    }
}

pub type AppResult<T> = Result<T, AppError>;