/*
    This file is part of gnix (https://codeberg.org/metamuffin/gnix)
    which is licensed under the GNU Affero General Public License (version 3); see /COPYING.
    Copyright (C) 2025 metamuffin <metamuffin.org>
*/
use super::{Node, NodeContext, NodeKind, NodeRequest, NodeResponse};
use crate::error::ServiceError;
use anyhow::Result;
use futures::Future;
use http_body_util::BodyExt;
use hyper::{header::HeaderValue, Response, StatusCode};
use serde::Deserialize;
use std::{pin::Pin, sync::Arc};

pub struct RedirectKind;

#[derive(Deserialize)]
pub struct Redirect(HeaderValueWrap);

impl NodeKind for RedirectKind {
    fn name(&self) -> &'static str {
        "redirect"
    }
    fn instanciate(&self, config: serde_yml::Value) -> Result<Arc<dyn Node>> {
        Ok(Arc::new(serde_yml::from_value::<Redirect>(config)?))
    }
}

impl Node for Redirect {
    fn handle<'a>(
        &'a self,
        _context: &'a mut NodeContext,
        _request: NodeRequest,
    ) -> Pin<Box<dyn Future<Output = Result<NodeResponse, ServiceError>> + Send + Sync + 'a>> {
        Box::pin(async move {
            let mut resp = Response::new("".to_string()).map(|b| b.map_err(|e| match e {}).boxed());
            *resp.status_mut() = StatusCode::MOVED_PERMANENTLY;
            resp.headers_mut().insert("Location", self.0 .0.clone());
            Ok(resp)
        })
    }
}

struct HeaderValueWrap(HeaderValue);
impl<'de> Deserialize<'de> for HeaderValueWrap {
    fn deserialize<D>(deserializer: D) -> std::result::Result<Self, D::Error>
    where
        D: serde::Deserializer<'de>,
    {
        let s = String::deserialize(deserializer)?;
        Ok(HeaderValueWrap(
            HeaderValue::from_str(&s).map_err(|e| serde::de::Error::custom(format!("{e}")))?,
        ))
    }
}