package com.example.speechtotext

import android.app.Activity
import android.content.pm.PackageManager
import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.speech.RecognizerIntent
import android.support.v4.app.ActivityCompat
import android.util.Log
import android.widget.Button
import java.util.*
import android.content.Intent
import android.widget.Toast


class MainActivity : AppCompatActivity() {

    //  錄製聲音權限
    private val userMicrophoneAgreeCode = 1

    //  語音辨識意圖
    private lateinit var userSpeechRecognizerIntent: Intent

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        //  進入 checkPermission()
        checkPermission()

        //  麥克風物件準備
        userSpeechRecognizerIntent = Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH)
        userSpeechRecognizerIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,RecognizerIntent.LANGUAGE_MODEL_FREE_FORM)
        userSpeechRecognizerIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, Locale.getDefault())
        userSpeechRecognizerIntent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Say something!!!!")

        //  開啟麥克風按鈕
        findViewById<Button>(R.id.ClickButton).setOnClickListener{
            //  開始收音 => 會持續進入 onActivityResult
            startActivityForResult(userSpeechRecognizerIntent,100)
        }
    }

    private fun checkPermission(){

        //  目前使用者麥克風權限
        val currentMicrophonePermission = ActivityCompat.checkSelfPermission(this, android.Manifest.permission.RECORD_AUDIO)

        //  檢查權限 => 要求權限後進入 onRequestPermissionsResult
        if(currentMicrophonePermission != PackageManager.PERMISSION_GRANTED)
            ActivityCompat.requestPermissions(this, arrayOf(android.Manifest.permission.RECORD_AUDIO), userMicrophoneAgreeCode)

        //  回到 onCreate
        return
    }

    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
        when (requestCode) {
            userMicrophoneAgreeCode -> {
                if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    Log.i("Message", "選擇開啟麥克風權限!!!")

                    //  回到 checkPermission
                    return
                } else {
                    Log.i("Message", "選擇不開啟麥克風權限!!!")
                    finish()
                }
            }
        }
    }

    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        super.onActivityResult(requestCode, resultCode, data)
        when(requestCode){
            100 -> {
                if(resultCode==Activity.RESULT_OK && data!=null){
                    val textResult = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS)[0]
                    Toast.makeText(this,textResult,Toast.LENGTH_LONG).show()
                }
            }
        }
    }
}