package com.example.programpengurutanangka

import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.activity.enableEdgeToEdge
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.foundation.text.KeyboardOptions
import androidx.compose.ui.text.input.KeyboardType
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import com.example.programpengurutanangka.ui.theme.ProgramPengurutanAngkaTheme

class MainActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        enableEdgeToEdge()
        setContent {
            ProgramPengurutanAngkaTheme {
                Scaffold { innerPadding ->
                    ProgramPengurutanAngka(
                        modifier = Modifier
                            .padding(innerPadding)
                            .padding(16.dp)
                    )
                }
            }
        }
    }
}

@Composable
fun ProgramPengurutanAngka(modifier: Modifier = Modifier) {
    var input by remember { mutableStateOf("") }
    var result by remember { mutableStateOf("") }
    var error by remember { mutableStateOf<String?>(null) }
    var ascending by remember { mutableStateOf(true) }

    Column(
        modifier = modifier.fillMaxSize(),
        verticalArrangement = Arrangement.Top,
        horizontalAlignment = Alignment.Start
    ) {
        OutlinedTextField(
            value = input,
            onValueChange = {
                input = it
                error = null
            },
            label = { Text("Masukkan angka (contoh: 9, 5, 1 atau 9 5 1 atau 9;5;1)") },
            modifier = Modifier.fillMaxWidth(),
            keyboardOptions = KeyboardOptions.Default.copy(keyboardType = KeyboardType.Text)
        )

        Spacer(modifier = Modifier.height(8.dp))

        Row(verticalAlignment = Alignment.CenterVertically) {
            Text("Urutkan:")
            Spacer(modifier = Modifier.width(8.dp))
            RadioButton(selected = ascending, onClick = { ascending = true })
            Text("Ascending", modifier = Modifier.padding(end = 12.dp))
            RadioButton(selected = !ascending, onClick = { ascending = false })
            Text("Descending")
        }

        Spacer(modifier = Modifier.height(12.dp))

        Button(onClick = {
            // Ambil semua angka yang valid (mendukung sign dan desimal, koma/dot sebagai pemisah desimal)
            val regex = Regex("-?\\d+[\\.,]?\\d*")
            val parsed = regex.findAll(input)
                .map { it.value.replace(',', '.') }   // ubah koma jadi dot supaya parseDouble berhasil
                .mapNotNull { it.toDoubleOrNull() }
                .toList()

            if (parsed.isEmpty()) {
                error = "Tidak ditemukan angka valid. Gunakan pemisah koma/spasi/semicolon atau masukkan angka."
                result = ""
            } else {
                val sorted = if (ascending) parsed.sorted() else parsed.sortedDescending()
                result = sorted.joinToString(", ") { n ->
                    // tampilkan tanpa .0 jika integer
                    if (n % 1.0 == 0.0) n.toLong().toString() else n.toString()
                }
                error = null
            }
        }) {
            Text("Urutkan")
        }

        Spacer(modifier = Modifier.height(12.dp))

        if (error != null) {
            Text(text = error!!, color = MaterialTheme.colorScheme.error)
        }

        Text(
            text = "Hasil: $result",
            style = MaterialTheme.typography.bodyLarge,
            modifier = Modifier.padding(top = 8.dp)
        )
    }
}

@Preview(showBackground = true)
@Composable
fun PreviewProgram() {
    ProgramPengurutanAngkaTheme {
        ProgramPengurutanAngka()
    }
}