MainActivity.kt

package com.milesmarine.reeflightcontroller

import android.content.Intent
import android.os.Bundle
import android.widget.Button
import android.widget.RadioButton
import android.widget.SeekBar
import android.widget.TextView
import android.widget.Toast
import androidx.activity.result.contract.ActivityResultContracts
import androidx.appcompat.app.AppCompatActivity
import okhttp3.*
import okhttp3.MediaType.Companion.toMediaType
import okhttp3.RequestBody.Companion.toRequestBody
import java.io.IOException
import java.util.Locale

class MainActivity : AppCompatActivity() {

    private lateinit var selectedDeviceTextView: TextView // To show the selected device IP
    private val client = OkHttpClient() // Shared OkHttpClient instance

    // Define an ActivityResultLauncher for handling the result from SecondActivity
    private val resultLauncher =
        registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
            if (result.resultCode == RESULT_OK) {
                val selectedIP =
                    result.data?.getStringExtra("selectedDeviceIP") // Get the selected IP from Intent
                selectedIP?.let {
                    selectedDeviceTextView.text = it // Display IP in TextView
                }
            }
        }

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

        // Find views
        val buttonOn = findViewById<Button>(R.id.power_on)
        val buttonOff = findViewById<Button>(R.id.power_off)
        val radioManual = findViewById<RadioButton>(R.id.manualBtn)
        val scanBtn = findViewById<Button>(R.id.scanBtn)
        selectedDeviceTextView = findViewById(R.id.selectedDevice) // Initialize the TextView
        val whitesSeekBar = findViewById<SeekBar>(R.id.whites)
        // Find the TextView that will display the SeekBar value
        val whitesValueText = findViewById<TextView>(R.id.whitesValueText)

        // Load saved device IP from shared preferences
        val sharedPreferences = getSharedPreferences("DevicePrefs", MODE_PRIVATE)
        val savedDeviceIP = sharedPreferences.getString("selectedDeviceIP", null)
        selectedDeviceTextView.text = savedDeviceIP ?: getString(R.string.no_device_selected)


        whitesSeekBar.setOnSeekBarChangeListener(object : SeekBar.OnSeekBarChangeListener {
            override fun onProgressChanged(seekBar: SeekBar?, progress: Int, fromUser: Boolean) {
                // Manually format the text using String.format
                whitesValueText.text = String.format(Locale.getDefault(), "%d%%", progress)
            }

            override fun onStartTrackingTouch(seekBar: SeekBar?) {
                // Optionally handle the start of tracking (user begins sliding)
            }

            override fun onStopTrackingTouch(seekBar: SeekBar?) {
                // Once the user stops sliding, send the dimmer command with the current progress
                val ip = getSelectedDeviceIP()
                if (ip != null) {
                    val brightness = seekBar?.progress ?: 0
                    sendDimmerCommand(ip, brightness)  // Send the dimmer command
                } else {
                    showNoDeviceSelectedToast()
                }
            }
        })


        buttonOn.setOnClickListener {
            val ip = getSelectedDeviceIP()
            if (ip != null) {
                radioManual.isChecked = true // Select Manual mode immediately
                sendHttpPostCommand("http://$ip/api/cmnd", "On") { success ->
                    runOnUiThread {
                        if (success) {
                            buttonOn.setBackgroundResource(R.drawable.button_green)
                            buttonOff.setBackgroundResource(R.drawable.button_gray)
                            Toast.makeText(this, "LED Turned On Successfully", Toast.LENGTH_SHORT)
                                .show()
                        } else {
                            Toast.makeText(
                                this,
                                "Failed to send Power On command",
                                Toast.LENGTH_SHORT
                            ).show()
                        }
                    }
                }
            } else {
                showNoDeviceSelectedToast()
            }
        }

        buttonOff.setOnClickListener {
            val ip = getSelectedDeviceIP()
            if (ip != null) {
                radioManual.isChecked = true // Select Manual mode immediately
                sendHttpPostCommand("http://$ip/api/cmnd", "Off") { success ->
                    runOnUiThread {
                        if (success) {
                            buttonOn.setBackgroundResource(R.drawable.button_gray)
                            buttonOff.setBackgroundResource(R.drawable.button_red)
                            Toast.makeText(this, "LED Turned Off Successfully", Toast.LENGTH_SHORT)
                                .show()
                        } else {
                            Toast.makeText(
                                this,
                                "Failed to send Power Off command",
                                Toast.LENGTH_SHORT
                            ).show()
                        }
                    }
                }
            } else {
                showNoDeviceSelectedToast()
            }
        }

        scanBtn.setOnClickListener {
            val intent = Intent(this, SecondActivity::class.java)
            resultLauncher.launch(intent) // Launch the SecondActivity using ActivityResultLauncher
        }
    }

    // Function to send dimmer command (brightness control) to OpenBeken device
    private fun sendDimmerCommand(ip: String, brightness: Int) {
        val url = "http://$ip/api/cmnd"
        val command = "dimmer $brightness" // Format the command to adjust brightness

        val requestBody = command.toRequestBody("text/plain".toMediaType())

        val request = Request.Builder()
            .url(url)
            .post(requestBody)
            .build()

        client.newCall(request).enqueue(object : Callback {
            override fun onFailure(call: Call, e: IOException) {
                e.printStackTrace()
                runOnUiThread {
                    Toast.makeText(
                        applicationContext,
                        "Failed to send dimmer command",
                        Toast.LENGTH_SHORT
                    ).show()
                }
            }

            override fun onResponse(call: Call, response: Response) {
                runOnUiThread {
                    if (response.isSuccessful) {
                        Toast.makeText(
                            applicationContext,
                            "Dimmer command sent successfully",
                            Toast.LENGTH_SHORT
                        ).show()
                    } else {
                        Toast.makeText(
                            applicationContext,
                            "Failed to send dimmer command",
                            Toast.LENGTH_SHORT
                        ).show()
                    }
                }
            }
        })
    }

    private fun sendHttpPostCommand(url: String, args: String, callback: (Boolean) -> Unit) {
        val command = "Power"
        val formattedCommand = "$command $args"
        val requestBody = formattedCommand.toRequestBody("text/plain".toMediaType())

        val request = Request.Builder()
            .url(url)
            .post(requestBody)
            .build()

        client.newCall(request).enqueue(object : Callback {
            override fun onFailure(call: Call, e: IOException) {
                e.printStackTrace()
                callback(false)
            }

            override fun onResponse(call: Call, response: Response) {
                callback(response.isSuccessful)
            }
        })
    }

    private fun getSelectedDeviceIP(): String? {
        val ip = selectedDeviceTextView.text.toString().trim()
        return if (ip.isEmpty() || ip == getString(R.string.no_device_selected)) {
            null
        } else {
            ip
        }
    }

    private fun showNoDeviceSelectedToast() {
        Toast.makeText(this, "Please click scan devices first", Toast.LENGTH_SHORT).show()
    }
}