use axum::Json;
use axum::extract::{Path, Query, 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::extras::{CommitsQuery, CommitsResponse};
use crate::features::git_ref::CommitView as CommitSummary;

#[utoipa::path(
    get,
    path = "/repo/{channel_id}/{repo_id}/commits",
    tag = "repo",
    params(CommitsQuery),
    responses((status = 200, description = "List commits", body = CommitsResponse)),
    security(("bearer_auth" = []))
)]
pub(crate) async fn list_handler(
    State(svc): State<RepoService>,
    AuthUser { claims }: AuthUser,
    Path((_, repo_id)): Path<(Uuid, Uuid)>,
    Query(q): Query<CommitsQuery>,
) -> RepoResult<Json<CommitsResponse>> {
    let out = svc.list_commits(claims.sub, repo_id, q).await?;
    Ok(Json(out))
}

#[utoipa::path(
    get,
    path = "/repo/{channel_id}/{repo_id}/git/commits/{sha}",
    tag = "repo",
    responses((status = 200, description = "Get a commit", body = CommitSummary)),
    security(("bearer_auth" = []))
)]
pub(crate) async fn get_handler(
    State(svc): State<RepoService>,
    AuthUser { claims }: AuthUser,
    Path((_, repo_id, sha)): Path<(Uuid, Uuid, String)>,
) -> RepoResult<Json<CommitSummary>> {
    let out = svc.get_commit(claims.sub, repo_id, &sha).await?;
    Ok(Json(out))
}

#[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", content_type = "text/plain")),
    security(("bearer_auth" = []))
)]
pub(crate) async fn diff_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 body = 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"),
        )],
        body.content,
    )
        .into_response();
    Ok(resp)
}