use axum::Json;
use axum::extract::{Path, State};
use jwt::extractor::AuthUser;
use serde::Deserialize;
use uuid::Uuid;

use crate::error::UserResult;
use crate::features::UserService;

#[derive(Debug, Deserialize)]
pub(crate) struct FollowPath {
    pub uid: Uuid,
}

#[utoipa::path(
    post,
    path = "/user/users/{uid}/follow",
    tag = "user",
    params(("uid" = Uuid, Path, description = "Target user identifier.")),
    responses(
        (status = 200, description = "Follow succeeded (idempotent)."),
        (status = 404, description = "Target user not found."),
    ),
    security(("bearer_auth" = [])),
)]
pub(crate) async fn handler(
    State(svc): State<UserService>,
    AuthUser { claims }: AuthUser,
    Path(FollowPath { uid }): Path<FollowPath>,
) -> UserResult<Json<serde_json::Value>> {
    svc.follow_user(claims.sub, uid).await?;
    Ok(Json(serde_json::json!({ "ok": true })))
}