<template>
  <div class="chat-fullscreen">
    <!-- Close button: top-left, glass pill, returns to previous view -->
    <div class="chat-mode-pill">
      <button class="chat-close-btn" @click="closeChat">
        <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
          <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12" />
        </svg>
        <span class="text-xs font-medium">Close</span>
      </button>
    </div>

    <!-- AIUI iframe -->
    <iframe
      v-if="aiuiUrl"
      ref="aiuiFrame"
      :src="aiuiUrl"
      class="chat-iframe"
      sandbox="allow-scripts allow-same-origin allow-forms"
      allow="microphone"
      style="background: transparent"
    />

    <!-- Fallback when no AIUI URL configured -->
    <div v-else class="chat-placeholder">
      <div class="chat-placeholder-inner">
        <div class="chat-placeholder-icon">
          <svg class="w-8 h-8 text-white/40" fill="none" stroke="currentColor" viewBox="0 0 24 24">
            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 12h.01M12 12h.01M16 12h.01M21 12c0 4.418-4.03 8-9 8a9.863 9.863 0 01-4.255-.949L3 20l1.395-3.72C3.512 15.042 3 13.574 3 12c0-4.418 4.03-8 9-8s9 3.582 9 8z" />
          </svg>
        </div>
        <h2 class="text-2xl font-semibold text-white mb-2">AI Assistant</h2>
        <p class="text-white/60 mb-4 leading-relaxed">
          AIUI is not connected. Configure the AIUI URL in your environment settings.
        </p>
        <p class="text-xs text-white/30">
          Set <code class="text-white/50">VITE_AIUI_URL</code> or deploy the AIUI container.
        </p>
      </div>
    </div>
  </div>
</template>

<script setup lang="ts">
import { ref, computed, onMounted, onBeforeUnmount } from 'vue'
import { useRouter } from 'vue-router'
import { ContextBroker } from '@/services/contextBroker'

const router = useRouter()
const aiuiFrame = ref<HTMLIFrameElement | null>(null)
let broker: ContextBroker | null = null

const aiuiUrl = computed(() => {
  const envUrl = import.meta.env.VITE_AIUI_URL
  if (envUrl) return `${envUrl}?embedded=true`
  // Production: served from /aiui/ via nginx proxy
  if (import.meta.env.PROD) return '/aiui/?embedded=true'
  return ''
})

function closeChat() {
  // Go back if there's history, otherwise go to dashboard
  if (window.history.length > 1) {
    router.back()
  } else {
    router.push('/dashboard')
  }
}

onMounted(() => {
  // Start context broker if AIUI URL is available
  if (aiuiUrl.value) {
    broker = new ContextBroker(aiuiFrame, aiuiUrl.value)
    broker.start()
  }
})

onBeforeUnmount(() => {
  broker?.stop()
  broker = null
})
</script>
