/*
       Licensed to the Apache Software Foundation (ASF) under one
       or more contributor license agreements.  See the NOTICE file
       distributed with this work for additional information
       regarding copyright ownership.  The ASF licenses this file
       to you 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 org.apache.cordova.file;

import android.util.SparseArray;

import org.apache.cordova.CallbackContext;

/**
 * Holds pending runtime permission requests
 */
class PendingRequests {
    private int currentReqId = 0;
    private SparseArray<Request> requests = new SparseArray<Request>();

    /**
     * Creates a request and adds it to the array of pending requests. Each created request gets a
     * unique result code for use with requestPermission()
     * @param rawArgs           The raw arguments passed to the plugin
     * @param action            The action this request corresponds to (get file, etc.)
     * @param callbackContext   The CallbackContext for this plugin call
     * @return                  The request code that can be used to retrieve the Request object
     */
    public synchronized int createRequest(String rawArgs, int action, CallbackContext callbackContext)  {
        Request req = new Request(rawArgs, action, callbackContext);
        requests.put(req.requestCode, req);
        return req.requestCode;
    }

    /**
     * Gets the request corresponding to this request code and removes it from the pending requests
     * @param requestCode   The request code for the desired request
     * @return              The request corresponding to the given request code or null if such a
     *                      request is not found
     */
    public synchronized Request getAndRemove(int requestCode) {
        Request result = requests.get(requestCode);
        requests.remove(requestCode);
        return result;
    }

    /**
     * Holds the options and CallbackContext for a call made to the plugin.
     */
    public class Request {

        // Unique int used to identify this request in any Android permission callback
        private int requestCode;

        // Action to be performed after permission request result
        private int action;

        // Raw arguments passed to plugin
        private String rawArgs;

        // The callback context for this plugin request
        private CallbackContext callbackContext;

        private Request(String rawArgs, int action, CallbackContext callbackContext) {
            this.rawArgs = rawArgs;
            this.action = action;
            this.callbackContext = callbackContext;
            this.requestCode = currentReqId ++;
        }

        public int getAction() {
            return this.action;
        }

        public String getRawArgs() {
            return rawArgs;
        }

        public CallbackContext getCallbackContext() {
            return callbackContext;
        }
    }
}