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

impl RepoService {
    pub async fn git_list_commits(
        &self,
        ctx: &Session,
        wk_name: &str,
        repo_name: &str,
        revision: &str,
        path: Option<String>,
        page_size: u32,
    ) -> Result<crate::pb::repo::ListCommitsResponse, 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)?.commit;
        let resp = svc
            .list_commits(tonic::Request::new(crate::pb::repo::ListCommitsRequest {
                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(),
                since: None,
                until: None,
                first_parent: false,
                all: false,
                reverse: false,
                max_parents: 0,
                min_parents: 0,
                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_commit(
        &self,
        ctx: &Session,
        wk_name: &str,
        repo_name: &str,
        revision: &str,
    ) -> Result<crate::pb::repo::Commit, 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)?.commit;
        let resp = svc
            .get_commit(tonic::Request::new(crate::pb::repo::GetCommitRequest {
                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(),
                        },
                    )),
                }),
                include_stats: true,
                include_raw: false,
            }))
            .await
            .map_err(|e| AppError::InternalServerError(e.to_string()))?;
        Ok(resp.into_inner())
    }
}