/*
 * Copyright (C) 2008 ZXing authors
 *
 * 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 com.reactnativecomponent.barcode.decoding;

import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.Result;
import com.reactnativecomponent.barcode.CaptureView;
import com.reactnativecomponent.barcode.R;
import com.reactnativecomponent.barcode.camera.CameraManager;
import com.reactnativecomponent.barcode.view.ViewfinderResultPointCallback;


import java.util.Vector;

/**
 * This class handles all the messaging which comprises the state machine for capture.
 *
 * @author dswitkin@google.com (Daniel Switkin)
 */
public final class CaptureActivityHandler extends Handler {

    private static final String TAG = CaptureActivityHandler.class.getSimpleName();

    private final CaptureView captureView;
    private final DecodeThread decodeThread;
    private State state;

    private enum State {
        PREVIEW,
        SUCCESS,
        DONE
    }

    public CaptureActivityHandler(CaptureView captureView, Vector<BarcodeFormat> decodeFormats,
                                  String characterSet) {
        this.captureView = captureView;
        decodeThread = new DecodeThread(captureView, decodeFormats, characterSet,
                new ViewfinderResultPointCallback(captureView.getViewfinderView()));
        decodeThread.start();
        state = State.SUCCESS;

        // Start ourselves capturing previews and decoding.
        CameraManager.get().startPreview();
        restartPreviewAndDecode();
    }

    @Override
    public void handleMessage(Message message) {
        if (message.what == R.id.auto_focus) {//            case R.id.auto_focus:
            //Log.d(TAG, "Got auto-focus message");
            // When one auto focus pass finishes, start another. This is the closest thing to
            // continuous AF. It does seem to hunt a bit, but I'm not sure what else to do.
            if (state == State.PREVIEW) {
                CameraManager.get().requestAutoFocus(this, R.id.auto_focus);
            }

        } else if (message.what == R.id.restart_preview) {//            case R.id.restart_preview:
//        Log.d(TAG, "Got restart preview message");
            restartPreviewAndDecode();

        } else if (message.what == R.id.decode_succeeded) {//            case R.id.decode_succeeded:
//        Log.d(TAG, "Got decode succeeded message");

                state = State.SUCCESS;
                Bundle bundle = message.getData();
               /* Bitmap barcode = bundle == null ? null :
                        (Bitmap) bundle.getParcelable(DecodeThread.BARCODE_BITMAP);*/
                captureView.handleDecode((Result) message.obj, null);

//            case R.id.decode_failed:
        } else if (message.what == R.id.decode_failed) {/**
         *扫码失败继续执行线程
         */

                // We're decoding as fast as possible, so when one decode fails, start another.
                state = State.PREVIEW;
                CameraManager.get().requestPreviewFrame(decodeThread.getHandler(), R.id.decode);

        } else if (message.what == R.id.return_scan_result) {//        Log.d(TAG, "Got return scan result message");
            captureView.ShowResult((Intent) message.obj);


     /* case R.id.launch_product_query:
        Log.d(TAG, "Got product query message");
        String url = (String) message.obj;
        Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
        activity.startActivity(intent);
        break;*/
        }
    }




    public void quitSynchronously() {
        if (state != State.DONE) {
            state = State.DONE;
            CameraManager.get().stopPreview();
            Message quit = Message.obtain(decodeThread.getHandler(), R.id.quit);
            quit.sendToTarget();
            decodeThread.flag=false;
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            decodeThread.interrupt();
            try {
                decodeThread.join();
            } catch (InterruptedException e) {
                e.printStackTrace();
                // continue
            }

            // Be absolutely sure we don't send any queued up messages
            removeMessages(R.id.decode_succeeded);
            removeMessages(R.id.decode_failed);
        }
    }

    public void restartPreviewAndDecode() {
        if (state == State.SUCCESS) {
            state = State.PREVIEW;
            decodeThread.flag=true;
            CameraManager.get().requestPreviewFrame(decodeThread.getHandler(), R.id.decode);
            CameraManager.get().requestAutoFocus(this, R.id.auto_focus);
            captureView.drawViewfinder();
        }
    }


}