package com.clawdbot.android.ui.chat

import androidx.compose.foundation.layout.Arrangement
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.lazy.LazyColumn
import androidx.compose.foundation.lazy.items
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.filled.Refresh
import androidx.compose.material3.AlertDialog
import androidx.compose.material3.FilledTonalIconButton
import androidx.compose.material3.Icon
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Surface
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.unit.dp
import com.clawdbot.android.chat.ChatSessionEntry

@Composable
fun ChatSessionsDialog(
  currentSessionKey: String,
  sessions: List<ChatSessionEntry>,
  onDismiss: () -> Unit,
  onRefresh: () -> Unit,
  onSelect: (sessionKey: String) -> Unit,
) {
  AlertDialog(
    onDismissRequest = onDismiss,
    confirmButton = {},
    title = {
      Row(verticalAlignment = Alignment.CenterVertically, modifier = Modifier.fillMaxWidth()) {
        Text("Sessions", style = MaterialTheme.typography.titleMedium)
        Spacer(modifier = Modifier.weight(1f))
        FilledTonalIconButton(onClick = onRefresh) {
          Icon(Icons.Default.Refresh, contentDescription = "Refresh")
        }
      }
    },
    text = {
      if (sessions.isEmpty()) {
        Text("No sessions", style = MaterialTheme.typography.bodyMedium, color = MaterialTheme.colorScheme.onSurfaceVariant)
      } else {
        LazyColumn(verticalArrangement = Arrangement.spacedBy(8.dp)) {
          items(sessions, key = { it.key }) { entry ->
            SessionRow(
              entry = entry,
              isCurrent = entry.key == currentSessionKey,
              onClick = { onSelect(entry.key) },
            )
          }
        }
      }
    },
  )
}

@Composable
private fun SessionRow(
  entry: ChatSessionEntry,
  isCurrent: Boolean,
  onClick: () -> Unit,
) {
  Surface(
    onClick = onClick,
    shape = MaterialTheme.shapes.medium,
    color =
      if (isCurrent) {
        MaterialTheme.colorScheme.primary.copy(alpha = 0.14f)
      } else {
        MaterialTheme.colorScheme.surfaceContainer
      },
    modifier = Modifier.fillMaxWidth(),
  ) {
    Row(
      modifier = Modifier.padding(horizontal = 12.dp, vertical = 10.dp),
      verticalAlignment = Alignment.CenterVertically,
      horizontalArrangement = Arrangement.spacedBy(10.dp),
    ) {
      Text(entry.displayName ?: entry.key, style = MaterialTheme.typography.bodyMedium)
      Spacer(modifier = Modifier.weight(1f))
      if (isCurrent) {
        Text("Current", style = MaterialTheme.typography.labelSmall, color = MaterialTheme.colorScheme.onSurfaceVariant)
      }
    }
  }
}
