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

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

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

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

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

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

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

    #[error("Internal error")]
    Internal,

    #[error(transparent)]
    Database(#[from] sqlx::Error),

    #[error(transparent)]
    Jwt(#[from] jsonwebtoken::errors::Error),

    #[error(transparent)]
    Io(#[from] std::io::Error),

    #[error("Argon2 error")]
    #[allow(dead_code)]
    Argon,

    #[error(transparent)]
    Reqwest(#[from] reqwest::Error),
}

impl IntoResponse for AppError {
    fn into_response(self) -> Response {
        error!("AppError: {self:?}");
        let (status, message) = match &self {
            AppError::NotFound(m) => (StatusCode::NOT_FOUND, m.clone()),
            AppError::Unauthorized(m) => (StatusCode::UNAUTHORIZED, m.clone()),
            AppError::BadRequest(m) => (StatusCode::BAD_REQUEST, m.clone()),
            AppError::Forbidden(m) => (StatusCode::FORBIDDEN, m.clone()),
            AppError::Conflict(m) => (StatusCode::CONFLICT, m.clone()),
            AppError::Validation(m) => (StatusCode::UNPROCESSABLE_ENTITY, m.clone()),
            AppError::Internal => (StatusCode::INTERNAL_SERVER_ERROR, "Internal server error".into()),
            AppError::Database(_) => (StatusCode::INTERNAL_SERVER_ERROR, "Internal server error".into()),
            AppError::Jwt(_) => (StatusCode::UNAUTHORIZED, "Invalid token".into()),
            AppError::Io(_) => (StatusCode::INTERNAL_SERVER_ERROR, "Internal server error".into()),
            AppError::Argon => (StatusCode::INTERNAL_SERVER_ERROR, "Internal server error".into()),
            AppError::Reqwest(_) => (StatusCode::INTERNAL_SERVER_ERROR, "Internal server error".into()),
        };

        (status, Json(json!({ "error": message }))).into_response()
    }
}

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