package com.smsgateway.app

import android.Manifest
import android.content.Intent
import android.content.pm.PackageManager
import android.os.Build
import android.os.Bundle
import android.widget.Toast
import androidx.activity.result.contract.ActivityResultContracts
import androidx.appcompat.app.AppCompatActivity
import androidx.core.content.ContextCompat
import com.smsgateway.app.databinding.ActivityMainBinding
import com.smsgateway.app.util.Prefs

class MainActivity : AppCompatActivity() {

    private lateinit var binding: ActivityMainBinding
    private lateinit var prefs: Prefs

    private val permissionLauncher = registerForActivityResult(
        ActivityResultContracts.RequestMultiplePermissions()
    ) { results ->
        val allGranted = results.values.all { it }
        val msg = if (allGranted) "تم منح كل الأذونات المطلوبة" else "بعض الأذونات لم تُمنح - التطبيق قد لا يعمل بشكل صحيح"
        Toast.makeText(this, msg, Toast.LENGTH_LONG).show()
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = ActivityMainBinding.inflate(layoutInflater)
        setContentView(binding.root)

        prefs = Prefs(this)
        loadPrefsIntoUi()
        refreshStatus()

        binding.btnSave.setOnClickListener {
            saveUiIntoPrefs()
            Toast.makeText(this, "تم حفظ الإعدادات", Toast.LENGTH_SHORT).show()
        }

        binding.btnRequestPermissions.setOnClickListener {
            requestNeededPermissions()
        }

        binding.btnStart.setOnClickListener {
            saveUiIntoPrefs()
            if (!prefs.isConfigured()) {
                Toast.makeText(this, "أدخل رابط السيرفر ومفتاح Gateway أولًا", Toast.LENGTH_LONG).show()
                return@setOnClickListener
            }
            if (!hasRequiredPermissions()) {
                Toast.makeText(this, "لازم تمنح الأذونات المطلوبة أولًا", Toast.LENGTH_LONG).show()
                requestNeededPermissions()
                return@setOnClickListener
            }
            startGatewayService()
            Toast.makeText(this, "تم تشغيل الـ Gateway", Toast.LENGTH_SHORT).show()
            refreshStatus()
        }

        binding.btnStop.setOnClickListener {
            stopService(Intent(this, GatewayService::class.java))
            prefs.serviceRunning = false
            Toast.makeText(this, "تم إيقاف الـ Gateway", Toast.LENGTH_SHORT).show()
            refreshStatus()
        }
    }

    override fun onResume() {
        super.onResume()
        refreshStatus()
    }

    private fun loadPrefsIntoUi() = with(binding) {
        etServerUrl.setText(prefs.serverUrl)
        etGatewayKey.setText(prefs.gatewayKey)
        etPollInterval.setText(prefs.pollIntervalSeconds.toString())
        etSmtpHost.setText(prefs.smtpHost)
        etSmtpPort.setText(prefs.smtpPort.toString())
        etSmtpUsername.setText(prefs.smtpUsername)
        etSmtpPassword.setText(prefs.smtpPassword)
        etSmtpFrom.setText(prefs.smtpFrom)
        cbSmtpSsl.isChecked = prefs.smtpUseSsl
    }

    private fun saveUiIntoPrefs() = with(binding) {
        prefs.serverUrl = etServerUrl.text.toString().trim()
        prefs.gatewayKey = etGatewayKey.text.toString().trim()
        prefs.pollIntervalSeconds = etPollInterval.text.toString().toIntOrNull() ?: 15
        prefs.smtpHost = etSmtpHost.text.toString().trim()
        prefs.smtpPort = etSmtpPort.text.toString().toIntOrNull() ?: 587
        prefs.smtpUsername = etSmtpUsername.text.toString().trim()
        prefs.smtpPassword = etSmtpPassword.text.toString()
        prefs.smtpFrom = etSmtpFrom.text.toString().trim()
        prefs.smtpUseSsl = cbSmtpSsl.isChecked
    }

    private fun refreshStatus() {
        val status = if (prefs.serviceRunning) "يعمل ✅" else "متوقف ⏸"
        val errorPart = if (prefs.lastError.isNotBlank()) "\nآخر خطأ: ${prefs.lastError}" else ""
        binding.tvStatus.text = "الحالة: $status\nآخر فحص: ${prefs.lastPollTime}$errorPart"
    }

    private fun startGatewayService() {
        val intent = Intent(this, GatewayService::class.java)
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            startForegroundService(intent)
        } else {
            startService(intent)
        }
    }

    private fun requiredPermissions(): Array<String> {
        val perms = mutableListOf(Manifest.permission.SEND_SMS)
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
            perms.add(Manifest.permission.POST_NOTIFICATIONS)
        }
        return perms.toTypedArray()
    }

    private fun hasRequiredPermissions(): Boolean =
        requiredPermissions().all {
            ContextCompat.checkSelfPermission(this, it) == PackageManager.PERMISSION_GRANTED
        }

    private fun requestNeededPermissions() {
        permissionLauncher.launch(requiredPermissions())
    }
}