package com.example.aiapp

import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.width
import androidx.compose.material3.Card
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.text.style.TextOverflow
import androidx.compose.ui.unit.dp

/**
 * A message another agent sent this session, closed until somebody asks.
 *
 * Closed by default, like a tool call and for the same reason: these are long, there can be several
 * in a row, and what a reader scanning the transcript needs from one is that it happened and who
 * sent it. The first line comes with the heading because a name alone does not say which message
 * this was.
 *
 * Drawn as its own kind rather than as the reader's own bubble. They did not say this, and a
 * transcript that puts it in their voice is making a claim about who asked for the work that
 * follows -- which is exactly the question a peer message is usually the answer to.
 */
@Composable
fun PeerMessageRow(
    item: TranscriptItem.PeerNote,
    expanded: Boolean,
    onToggle: (Float) -> Unit,
    replies: ParsedReplies,
    modifier: Modifier = Modifier,
) {
    Card(modifier.fillMaxWidth().clickableAt(onToggle)) {
        Column(Modifier.padding(12.dp)) {
            Row(verticalAlignment = Alignment.CenterVertically) {
                Text("Message from ${item.from}", style = MaterialTheme.typography.titleSmall)
                if (!expanded) {
                    Spacer(Modifier.width(8.dp))
                    Text(
                        item.text.lineSequence().firstOrNull { it.isNotBlank() }.orEmpty(),
                        style = MaterialTheme.typography.bodySmall,
                        color = MaterialTheme.colorScheme.onSurfaceVariant,
                        maxLines = 1,
                        // The head, not the tail: a message is identified by how it opens.
                        overflow = TextOverflow.Ellipsis,
                    )
                }
            }
            if (expanded) MarkdownText(item.text, replies, Modifier.padding(top = 6.dp))
        }
    }
}