// GroceryItemsList Example
// Source code file: MainActivity.kt

package it372.ssmith.groceryitemslist
import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.activity.enableEdgeToEdge
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.material3.Button
import androidx.compose.material3.Scaffold
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.ui.Modifier
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import it372.ssmith.groceryitemslist.ui.theme.GroceryItemsListTheme

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

@Composable
fun MainLayout( ) {

    val items = listOf(
        GroceryItem("Cabbage", 34567, price = 2.59),
        GroceryItem("Tomatos", 46576, price = 3.55),
        GroceryItem("Onions", 76543, price = 2.58)
    )
    var textContents = remember { mutableStateOf("") }
    Column(modifier = Modifier.padding(all = 40.dp)) {

        Button(
            onClick = {
                var output = ""
                for(item in items) {
                    output += item.toString( ) + "\n"
                }
                textContents.value = output
            },
            content = { Text("Show Grocery Items") }
        )

        Text(text = textContents.value)
    }
}

@Preview(showBackground = true)
@Composable
fun MainLayoutPreview() {
    MainLayout( )
}