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use poem::{FromRequest, IntoResponse, Request, RequestBody, Response};

use crate::{
    payload::{ParsePayload, Payload},
    registry::{MetaSchema, MetaSchemaRef},
    ParseRequestError,
};

/// A binary payload.
#[derive(Debug, Clone, Eq, PartialEq)]
pub struct Binary<T>(pub T);

impl<T> Payload for Binary<T> {
    const CONTENT_TYPE: &'static str = "application/octet-stream";

    fn schema_ref() -> MetaSchemaRef {
        MetaSchemaRef::Inline(Box::new(MetaSchema {
            format: Some("binary"),
            ..MetaSchema::new("string")
        }))
    }
}

#[poem::async_trait]
impl ParsePayload for Binary<Vec<u8>> {
    async fn from_request(
        request: &Request,
        body: &mut RequestBody,
    ) -> Result<Self, ParseRequestError> {
        Ok(Self(<Vec<u8>>::from_request(request, body).await.map_err(
            |err| ParseRequestError::ParseRequestBody {
                reason: err.to_string(),
            },
        )?))
    }
}

impl<T: Into<Vec<u8>> + Send> IntoResponse for Binary<T> {
    fn into_response(self) -> Response {
        Response::builder()
            .content_type(Self::CONTENT_TYPE)
            .body(self.0.into())
    }
}