use ::session::Session;
use export::http::{Path, State};
use export::rest::AppResponseData;

use crate::errors::{ApiError, GitApiError};
use crate::handler;
use crate::service::GitService;
use crate::service::blobs::BlobContentDto;

#[derive(Debug, Clone, serde::Deserialize, utoipa::IntoParams)]
pub struct BlobPath {
    pub space_name: String,
    pub repo_name: String,
    pub oid: String,
}

#[utoipa::path(
    get,
    path = "/repos/{space_name}/{repo_name}/blobs/{oid}/content",
    tag = "blobs",
    description = "读取 Blob 原始内容，超过配置上限时截断并标记。",
    params(BlobPath),
    responses(
        (status = 200, description = "blob content", body = AppResponseData<BlobContentDto>)
    )
)]
pub async fn blob_content(
    State(service): State<GitService>,
    session: Session,
    Path(path): Path<BlobPath>,
) -> Result<AppResponseData<BlobContentDto>, ApiError> {
    let (ctx, _) = handler::resolve_reader(
        &service,
        &session,
        path.space_name.clone(),
        path.repo_name.clone(),
    )
    .await?;
    let out = service
        .blob_content(&ctx, path.oid)
        .await
        .map_err(GitApiError::from)?;
    Ok(AppResponseData::ok(out))
}