<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">
      <GnAlert
        v-if="ws.reconnectFailed.value"
        variant="warning"
        class="reconnect-banner"
      >
        <i class="ph ph-wifi-slash"></i>
        {{ t('chat.connectionLost') }}
        <GnIconButton icon="ph ph-arrows-clockwise" :label="t('chat.retry')" @click="retryNow" />
      </GnAlert>
    </Transition>

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

    <div v-else class="empty-chat">
      <GnEmptyState
        icon="ph ph-chat-dots"
        :title="t('chat.nothingOpen')"
        :text="t('chat.startConversation')"
      />
    </div>
  </div>
</template>

<script setup>
import { watch, onUnmounted } from 'vue'
import { useChatStore } from '@/stores/chat.js'
import { useWebSocket } from '@/composables/useWebSocket.js'
import { t } from '@/i18n/index.js'
import ChatHeader from './ChatHeader.vue'
import MessageList from './MessageList.vue'
import InputBar from './InputBar.vue'
import QueuedMessagesChip from './QueuedMessagesChip.vue'

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

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

// 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;
  margin: 8px 16px 0;
  font-size: 13px;
}
</style>