package com.joshayoung.mobiledevcampusminichallenges

import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.activity.enableEdgeToEdge
import androidx.compose.foundation.background
import androidx.compose.foundation.clickable
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Surface
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableIntStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import com.joshayoung.mobiledevcampusminichallenges.ui.theme.MobileDevCampusMiniChallengesTheme

class MainActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        enableEdgeToEdge()
        setContent {
            MobileDevCampusMiniChallengesTheme {
                ThousandsSeparatorPicker()
            }
        }
    }
}

@Composable
fun ThousandsSeparatorPicker() {
    Surface(
        modifier = Modifier
            .background(color = MaterialTheme.colorScheme.background)
            .fillMaxSize()
    ) {
        Column(modifier = Modifier
            .padding(20.dp)
            ,verticalArrangement = Arrangement.Center,
        ) {
            Text("Thousands separator", modifier = Modifier
                .padding(bottom = 4.dp)
                ,fontWeight = FontWeight.SemiBold,
                color = MaterialTheme.colorScheme.onBackground
            )
            Box(modifier = Modifier
                .clip(RoundedCornerShape(16.dp))
                .background(color = Color(0xFF8138FF).copy(alpha = 0.08f))
                .fillMaxWidth()
                .padding(4.dp)
            ) {
                Row(modifier = Modifier
                    .fillMaxWidth()
                    ,horizontalArrangement = Arrangement.SpaceBetween
                ) {
                    val options = listOf("1.000", "1,000", "1 000")
                    SelectableButtons(options)
                }
            }
        }
    }
}

@Composable
fun SelectableButtons(items: List<String>) {
    var selectedIndex by remember { mutableIntStateOf(0) }

    items.forEachIndexed { index, item ->
        Box(modifier = Modifier
            .clip(RoundedCornerShape(16.dp))
            .clickable {
                selectedIndex = index
            }
            .background(
                if(selectedIndex == index) {
                    Color.White
                } else {
                    Color.Transparent
                }
            )
            .padding(horizontal = 20.dp)
        ) {
            var fontWeight = FontWeight.Normal;
            if(selectedIndex == index) {
                fontWeight = FontWeight.Bold;
            }
            Text(text = item,
                fontWeight = fontWeight,
                textAlign = TextAlign.Center,
                modifier = Modifier
                    .padding(10.dp),
            )
        }
    }
}

@Preview(showBackground = true)
@Composable
fun MobileDevChallengesPreview() {
    MobileDevCampusMiniChallengesTheme {
        ThousandsSeparatorPicker()
    }
}