use crate::controllers::HttpResult;
use crate::extractors::matrix_client_extractor::MatrixClientExtractor;
use crate::utils::crypt_utils::sha512;
use actix_web::dev::Payload;
use actix_web::http::header;
use actix_web::{FromRequest, HttpRequest, HttpResponse, web};
use matrix_sdk::media::{MediaFormat, MediaRequestParameters, MediaThumbnailSettings};
use matrix_sdk::ruma::events::room::MediaSource;
use matrix_sdk::ruma::{OwnedMxcUri, UInt};

#[derive(serde::Deserialize)]
struct MediaQuery {
    #[serde(default)]
    thumbnail: bool,
}

/// Serve a media file
pub async fn serve_media(req: HttpRequest, media: OwnedMxcUri) -> HttpResult {
    let query = web::Query::<MediaQuery>::from_request(&req, &mut Payload::None).await?;
    let client = MatrixClientExtractor::from_request(&req, &mut Payload::None).await?;

    let media = client
        .client
        .client
        .media()
        .get_media_content(
            &MediaRequestParameters {
                source: MediaSource::Plain(media),
                format: match query.thumbnail {
                    true => MediaFormat::Thumbnail(MediaThumbnailSettings::new(
                        UInt::new(100).unwrap(),
                        UInt::new(100).unwrap(),
                    )),
                    false => MediaFormat::File,
                },
            },
            true,
        )
        .await?;

    let digest = sha512(&media);

    let mime_type = infer::get(&media).map(|x| x.mime_type());

    // Check if the browser already knows the etag
    if let Some(c) = req.headers().get(header::IF_NONE_MATCH)
        && c.to_str().unwrap_or("") == digest
    {
        return Ok(HttpResponse::NotModified().finish());
    }

    Ok(HttpResponse::Ok()
        .content_type(mime_type.unwrap_or("application/octet-stream"))
        .insert_header(("etag", digest))
        .insert_header(("cache-control", "max-age=360000"))
        .body(media))
}

#[derive(serde::Deserialize)]
pub struct MediaMXCInPath {
    mxc: OwnedMxcUri,
}

/// Save media resource handler
pub async fn serve_media_res(req: HttpRequest, media: web::Path<MediaMXCInPath>) -> HttpResult {
    serve_media(req, media.into_inner().mxc).await
}