use crate::error::AppError;
use crate::service::RepoService;
use crate::session::Session;

impl RepoService {
    #[allow(clippy::too_many_arguments)]
    pub async fn git_list_tree(
        &self,
        ctx: &Session,
        wk_name: &str,
        repo_name: &str,
        revision: &str,
        path: Option<String>,
        recursive: bool,
        page_size: u32,
    ) -> Result<crate::pb::repo::ListTreeResponse, AppError> {
        let user_uid = ctx.user().ok_or(AppError::Unauthorized)?;
        let repo = self.resolve_repo(wk_name, repo_name).await?;
        self.ensure_repo_readable(user_uid, &repo).await?;
        let ws = self.resolve_workspace(wk_name).await?;
        let header = self.repo_header(&repo, &ws);
        let mut svc = self.git_client(&repo)?.tree;
        let resp = svc
            .list_tree(tonic::Request::new(crate::pb::repo::ListTreeRequest {
                repository: Some(header),
                revision: Some(crate::pb::repo::ObjectSelector {
                    selector: Some(crate::pb::repo::object_selector::Selector::Revision(
                        crate::pb::repo::ObjectName {
                            revision: revision.to_string(),
                        },
                    )),
                }),
                path: path.unwrap_or_default(),
                recursive,
                pagination: Some(crate::pb::repo::Pagination {
                    page_size,
                    page_token: String::new(),
                }),
            }))
            .await
            .map_err(|e| AppError::InternalServerError(e.to_string()))?;
        Ok(resp.into_inner())
    }

    pub async fn git_get_blob(
        &self,
        ctx: &Session,
        wk_name: &str,
        repo_name: &str,
        revision: &str,
        path: &str,
    ) -> Result<crate::pb::repo::Blob, AppError> {
        let user_uid = ctx.user().ok_or(AppError::Unauthorized)?;
        let repo = self.resolve_repo(wk_name, repo_name).await?;
        self.ensure_repo_readable(user_uid, &repo).await?;
        let ws = self.resolve_workspace(wk_name).await?;
        let header = self.repo_header(&repo, &ws);
        let mut svc = self.git_client(&repo)?.tree;
        let resp = svc
            .get_blob(tonic::Request::new(crate::pb::repo::GetBlobRequest {
                repository: Some(header),
                revision: Some(crate::pb::repo::ObjectSelector {
                    selector: Some(crate::pb::repo::object_selector::Selector::Revision(
                        crate::pb::repo::ObjectName {
                            revision: revision.to_string(),
                        },
                    )),
                }),
                path: path.to_string(),
                oid: None,
                max_bytes: 0,
            }))
            .await
            .map_err(|e| AppError::InternalServerError(e.to_string()))?;
        Ok(resp.into_inner())
    }
}