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

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

#[derive(Debug, Clone, serde::Deserialize, utoipa::IntoParams)]
pub struct DiffBaseHeadQuery {
    pub base: String,
    pub head: String,
}

#[utoipa::path(
    get,
    path = "/repos/{space_name}/{repo_name}/diff/raw",
    tag = "diffs",
    description = "返回两个修订之间的原始 unified diff 文本。",
    params(
        crate::handler::RepoPath,
        DiffBaseHeadQuery,
    ),
    responses(
        (status = 200, description = "raw diff", body = AppResponseData<String>)
    )
)]
pub async fn diff_raw(
    State(service): State<GitService>,
    session: Session,
    Path(path): Path<crate::handler::RepoPath>,
    Query(q): Query<DiffBaseHeadQuery>,
) -> Result<AppResponseData<String>, ApiError> {
    let _ = handler::resolve_reader(
        &service,
        &session,
        path.space_name.clone(),
        path.repo_name.clone(),
    )
    .await?;
    let out = service
        .diff_raw(path.space_name, path.repo_name, q.base, q.head)
        .await
        .map_err(GitApiError::from)?;
    Ok(AppResponseData::ok(out))
}