<template>
  <div class="chat-area">
    <ChatHeader
      @toggle-sidebar="emit('toggle-sidebar')"
      @toggle-artifacts="emit('toggle-artifacts')"
    />

    <!-- Reconnect toast (system-level, shown inline at top) -->
    <Transition name="fade">
      <div v-if="ws.reconnectFailed.value" class="reconnect-banner">
        <i class="ph ph-wifi-slash"></i>
        Connection lost. Retrying in background…
        <GnIconButton icon="ph ph-arrows-clockwise" label="Retry" @click="retryNow" />
      </div>
    </Transition>

    <template v-if="chat.currentId">
      <MessageList />
      <InputBar :ws="ws" />
    </template>

    <div v-else class="empty-chat">
      <i class="ph ph-chat-dots empty-icon"></i>
      <p>Select a conversation or start a new one</p>
    </div>
  </div>
</template>

<script setup>
import { watch, onUnmounted, provide } from 'vue'
import { useChatStore } from '@/stores/chat.js'
import { useWebSocket } from '@/composables/useWebSocket.js'
import ChatHeader from './ChatHeader.vue'
import MessageList from './MessageList.vue'
import InputBar from './InputBar.vue'

const emit = defineEmits(['toggle-sidebar', 'toggle-artifacts'])

const chat = useChatStore()
const ws = useWebSocket()

provide('wsSend', ws.send)

// Connect/reconnect WS when session changes
watch(
  () => chat.currentId,
  (id) => {
    if (id) ws.connect(id)
    else ws.disconnect()
  },
  { immediate: true }
)

function retryNow() {
  if (chat.currentId) ws.connect(chat.currentId)
}

onUnmounted(() => ws.disconnect())
</script>

<style scoped>
.reconnect-banner {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(224, 175, 104, 0.1);
  border-bottom: 1px solid rgba(224, 175, 104, 0.3);
  font-size: 13px;
  color: var(--color-warning, #e0af68);
}
</style>