package com.vanta.smsgateway

import android.Manifest
import android.content.Context
import android.content.Intent
import android.content.pm.PackageManager
import android.os.Build
import android.os.Bundle
import android.widget.*
import androidx.appcompat.app.AppCompatActivity
import androidx.core.app.ActivityCompat
import androidx.core.content.ContextCompat

class MainActivity : AppCompatActivity() {

    private lateinit var etUrl:    EditText
    private lateinit var etKey:    EditText
    private lateinit var btnStart: Button
    private lateinit var tvStatus: TextView
    private lateinit var tvSim:    TextView

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

        etUrl    = findViewById(R.id.et_url)
        etKey    = findViewById(R.id.et_key)
        btnStart = findViewById(R.id.btn_start)
        tvStatus = findViewById(R.id.tv_status)
        tvSim    = findViewById(R.id.tv_sim)

        val prefs = getSharedPreferences(SmsService.PREF_NAME, Context.MODE_PRIVATE)
        etUrl.setText(prefs.getString(SmsService.PREF_URL, ""))
        etKey.setText(prefs.getString(SmsService.PREF_KEY, ""))

        updateUI()

        btnStart.setOnClickListener {
            if (SmsService.isRunning) stopGateway() else requestAndStart()
        }
    }

    override fun onResume() {
        super.onResume()
        updateUI()
        if (hasPhonePerm()) tvSim.text = SubscriptionHelper.describe(this)
    }

    private fun updateUI() {
        if (SmsService.isRunning) {
            btnStart.text = "Stop Gateway"
            tvStatus.text = "● Running"
            tvStatus.setTextColor(getColor(android.R.color.holo_green_light))
        } else {
            btnStart.text = "Start Gateway"
            tvStatus.text = "● Stopped"
            tvStatus.setTextColor(getColor(android.R.color.darker_gray))
        }
    }

    private fun requestAndStart() {
        val perms = mutableListOf(Manifest.permission.SEND_SMS, Manifest.permission.READ_PHONE_STATE)
        if (Build.VERSION.SDK_INT >= 33) perms += Manifest.permission.POST_NOTIFICATIONS
        val denied = perms.filter { ContextCompat.checkSelfPermission(this, it) != PackageManager.PERMISSION_GRANTED }
        if (denied.isEmpty()) startGateway()
        else ActivityCompat.requestPermissions(this, denied.toTypedArray(), 100)
    }

    override fun onRequestPermissionsResult(code: Int, perms: Array<String>, results: IntArray) {
        super.onRequestPermissionsResult(code, perms, results)
        if (code == 100) {
            if (results.any { it != PackageManager.PERMISSION_GRANTED })
                Toast.makeText(this, "SMS and Phone permissions required", Toast.LENGTH_LONG).show()
            else startGateway()
        }
    }

    private fun startGateway() {
        val url = etUrl.text.toString().trim()
        val key = etKey.text.toString().trim()
        if (url.isEmpty() || key.isEmpty()) {
            Toast.makeText(this, "Enter server URL and API key", Toast.LENGTH_SHORT).show()
            return
        }
        getSharedPreferences(SmsService.PREF_NAME, Context.MODE_PRIVATE).edit()
            .putString(SmsService.PREF_URL, url)
            .putString(SmsService.PREF_KEY, key)
            .apply()

        val svc = Intent(this, SmsService::class.java)
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) startForegroundService(svc)
        else startService(svc)

        updateUI()
        tvSim.text = SubscriptionHelper.describe(this)
    }

    private fun stopGateway() {
        startService(Intent(this, SmsService::class.java).apply { action = SmsService.ACTION_STOP })
        updateUI()
    }

    private fun hasPhonePerm() =
        ContextCompat.checkSelfPermission(this, Manifest.permission.READ_PHONE_STATE) ==
                PackageManager.PERMISSION_GRANTED
}