import android.Manifest
import android.content.ContentValues
import android.content.Context
import android.content.Intent
import android.content.pm.PackageManager
import android.database.sqlite.SQLiteDatabase
import android.database.sqlite.SQLiteOpenHelper
import android.net.Uri
import android.os.Bundle
import android.provider.MediaStore
import android.view.View
import androidx.appcompat.app.AppCompatActivity
import androidx.core.app.ActivityCompat
import androidx.core.content.ContextCompat
import androidx.core.content.FileProvider
import com.google.android.material.snackbar.Snackbar
import java.io.File
import java.io.IOException
import java.text.SimpleDateFormat
import java.util.*

class MainActivity : AppCompatActivity() {
    private lateinit var dbHelper: MyDatabaseHelper
    private lateinit var db: SQLiteDatabase

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

        dbHelper = MyDatabaseHelper(this)
        db = dbHelper.writableDatabase

        // Check for camera permission and request it if necessary.
        if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.CAMERA), CAMERA_PERMISSION_REQUEST_CODE)
        } else {
            startCamera()
        }
    }

    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults)

        if (requestCode == CAMERA_PERMISSION_REQUEST_CODE && grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            startCamera()
        }
    }

    private fun startCamera() {
        // TODO: Connect to the Wi-Fi module and listen for data

        // TODO: When data is received, take a photo with the camera and display a pop-up message with the name
        val view: View = findViewById(android.R.id.content)
        val uid = "123456789"
        val name = "starfield"
        val message = "$name verified!"
        val duration = Snackbar.LENGTH_SHORT
        val snackbar = Snackbar.make(view, message, duration)
        snackbar.show()

        // Take a photo with the camera and save it to the database.
        val cameraIntent = Intent(MediaStore.ACTION_IMAGE_CAPTURE)
        startActivityForResult(cameraIntent, CAMERA_REQUEST_CODE)
    }

    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        super.onActivityResult(requestCode, resultCode, data)

        if (requestCode == CAMERA_REQUEST_CODE && resultCode == RESULT_OK) {
            val values = ContentValues().apply {
                put("name", "photo_${System.currentTimeMillis()}.jpg")
            }

            val uri = contentResolver.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values)

            try {
                contentResolver.openOutputStream(uri!!)?.use { outputStream ->
                    outputStream.write(data?.extras?.get("data") as ByteArray)
                }
            } catch (e: IOException) {
                e.printStackTrace()
            }

            db.insert("photos", null, values)
        }
    }

    companion object {