// Android — Hello World (Ryuzaki Labs) — Jetpack Compose
package com.ryuzaki.labs

// build.gradle (Module) ➜ dependencies :
// implementation("androidx.activity:activity-compose:1.9.2")
// implementation("androidx.compose.ui:ui:1.7.2")
// implementation("androidx.compose.material3:material3:1.3.0")

import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.compose.foundation.layout.*
import androidx.compose.material3.*
import androidx.compose.runtime.*
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp

class MainActivity : ComponentActivity() { 
  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContent {
      MaterialTheme {
        RyuzakiHelloScreen()
      }
    }
  }
}

@Composable
fun RyuzakiHelloScreen() {
  var name by remember { mutableStateOf("Ryuzaki Labs") }
  var message by remember { mutableStateOf("Hello, World! ✨") }

  Box(
    modifier = Modifier
      .fillMaxSize()
      .padding(24.dp),
    contentAlignment = Alignment.Center
  ) {
    Column(
      verticalArrangement = Arrangement.spacedBy(16.dp),
      horizontalAlignment = Alignment.CenterHorizontally
    ) {
      Text(
        text = "Ryuzaki Labs ✨",
        fontSize = 24.sp,
        fontWeight = FontWeight.Bold
      )
      OutlinedTextField(
        value = name,
        onValueChange = { name = it },
        label = { Text("Votre nom") },
        singleLine = true
      )
      Button(onClick = { 
        message = hello(name) 
      }) {
        Text("Dire bonjour 👋")
      }
      Text(text = message, fontSize = 18.sp)
    }
  }
}

fun hello(name: String): String {
  println("Kotlin says: Hello, $name 👋")
  return "Hello, $name 👋 — bienvenue chez Ryuzaki Labs."
}