use axum::extract::{Path, State};
use axum::http::HeaderValue;
use axum::http::header;
use axum::response::{IntoResponse, Response};
use jwt::extractor::AuthUser;
use uuid::Uuid;

use crate::error::RepoResult;
use crate::features::RepoService;
use crate::features::git_ref::CommitDiffPayload;

#[utoipa::path(
    get,
    path = "/repo/{channel_id}/{repo_id}/git/commits/{sha}.{diff_type}",
    tag = "repo",
    responses((status = 200, description = "Get commit diff or patch", body = CommitDiffPayload)),
    security(("bearer_auth" = []))
)]
pub(crate) async fn handler(
    State(svc): State<RepoService>,
    AuthUser { claims }: AuthUser,
    Path((_, repo_id, sha_dot_type)): Path<(Uuid, Uuid, String)>,
) -> RepoResult<Response> {
    let (sha, diff_type) = sha_dot_type
        .rsplit_once('.')
        .ok_or_else(|| crate::error::RepoError::BadRequest("expected '<sha>.diff|patch'".into()))?;
    let payload = svc
        .get_commit_diff_or_patch(claims.sub, repo_id, sha, diff_type)
        .await?;
    let resp = (
        [(
            header::CONTENT_TYPE,
            HeaderValue::from_static("text/plain; charset=utf-8"),
        )],
        payload.content,
    )
        .into_response();
    Ok(resp)
}