Closer/app/src/main/java/app/closer/ui/components/LoadingState.kt

package app.closer.ui.components

import app.closer.R
import app.closer.ui.theme.closerCardColor
import android.provider.Settings
import androidx.compose.animation.core.FastOutSlowInEasing
import androidx.compose.animation.core.RepeatMode
import androidx.compose.animation.core.animateFloat
import androidx.compose.animation.core.infiniteRepeatable
import androidx.compose.animation.core.rememberInfiniteTransition
import androidx.compose.animation.core.tween
import androidx.compose.foundation.Image
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.remember
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.graphicsLayer
import androidx.compose.ui.platform.LocalContext
import androidx.compose.ui.res.painterResource
import androidx.compose.ui.semantics.clearAndSetSemantics
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.dp

@Composable
fun LoadingState(
    message: String = "Loading…",
    modifier: Modifier = Modifier
) {
    CloserCard(
        modifier = modifier.fillMaxWidth(),
        containerColor = closerCardColor(alpha = 0.8f)
    ) {
        Column(
            modifier = Modifier
                .fillMaxWidth()
                .padding(CloserSpacing.Xxxl),
            horizontalAlignment = Alignment.CenterHorizontally,
            verticalArrangement = Arrangement.spacedBy(CloserSpacing.Md)
        ) {
            CloserHeartLoader()
            Text(
                text = message,
                style = MaterialTheme.typography.bodyMedium,
                color = MaterialTheme.colorScheme.onSurfaceVariant,
                textAlign = TextAlign.Center
            )
            BrandMessageRotator(
                color = MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.82f),
                style = MaterialTheme.typography.bodySmall
            )
        }
    }
}

@Composable
fun CloserHeartLoader(
    modifier: Modifier = Modifier,
    size: Dp = 76.dp
) {
    CloserMarkLoader(modifier = modifier, size = size)
}

@Composable
fun CloserMarkLoader(
    modifier: Modifier = Modifier,
    size: Dp = 76.dp
) {
    val context = LocalContext.current
    val reducedMotion = remember {
        Settings.Global.getFloat(
            context.contentResolver,
            Settings.Global.ANIMATOR_DURATION_SCALE,
            1f
        ) == 0f
    }
    val transition = rememberInfiniteTransition(label = "closerMarkLoader")
    val animatedPulse = transition.animateFloat(
        initialValue = 0.96f,
        targetValue = 1.04f,
        animationSpec = infiniteRepeatable(
            animation = tween(durationMillis = 900, easing = FastOutSlowInEasing),
            repeatMode = RepeatMode.Reverse
        ),
        label = "closerMarkPulse"
    )
    val pulse = if (reducedMotion) 1f else animatedPulse.value

    Image(
        painter = painterResource(R.drawable.closer_mark_loader),
        contentDescription = null,
        modifier = modifier
            .size(size)
            .graphicsLayer {
                scaleX = pulse
                scaleY = pulse
            }
            .clearAndSetSemantics {}
    )
}