// Copyright 2019 Drone IO, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package users

import (
	"net/http"
	"strconv"

	"github.com/drone/drone/core"
	"github.com/drone/drone/handler/api/render"
	"github.com/drone/drone/logger"

	"github.com/go-chi/chi"
)

// HandleFind returns an http.HandlerFunc that writes json-encoded
// user account information to the response body.
func HandleFind(users core.UserStore) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		login := chi.URLParam(r, "user")

		user, err := users.FindLogin(r.Context(), login)
		if err != nil {
			// the client can make a user request by providing
			// the user id as opposed to the username. If a
			// numeric user id is provided as input, attempt
			// to lookup the user by id.
			if id, _ := strconv.ParseInt(login, 10, 64); id != 0 {
				user, err = users.Find(r.Context(), id)
				if err == nil {
					render.JSON(w, user, 200)
					return
				}
			}
			render.NotFound(w, err)
			logger.FromRequest(r).Debugln("api: cannot find user")
		} else {
			render.JSON(w, user, 200)
		}
	}
}
