<template>
  <div class="app-layout">
    <aside class="sidebar">
      <div class="sidebar-header">
        <img src="/ge-aerospace-logo.svg" alt="GE Aerospace" class="sidebar-logo" />
        <h1>West Jefferson</h1>
      </div>

      <div class="sidebar-search">
        <input
          v-model="searchQuery"
          type="text"
          placeholder="Search..."
          @keyup.enter="performSearch"
        />
      </div>

      <nav class="sidebar-nav">
        <template v-for="item in navItems" :key="item.route">
          <div v-if="item.section" class="nav-section">{{ item.section }}</div>
          <router-link :to="item.route">
            <component v-if="item.iconComponent" :is="item.iconComponent" :size="16" />
            {{ item.name }}
          </router-link>
        </template>

        <div class="nav-section">Displays</div>
        <a href="/shopfloor" target="_blank" class="external-link">Shopfloor Dashboard</a>
        <a href="/tv" target="_blank" class="external-link">TV Slideshow</a>

        <router-link v-if="authStore.isAdmin" to="/settings">Settings</router-link>
      </nav>

      <div class="sidebar-footer">
        <button class="theme-toggle" @click="toggleTheme" :title="currentTheme === 'dark' ? 'Switch to light mode' : 'Switch to dark mode'">
          <span v-if="currentTheme === 'dark'"><Sun :size="14" /> Light</span>
          <span v-else><Moon :size="14" /> Dark</span>
        </button>

        <div class="user-menu">
          <template v-if="authStore.isAuthenticated">
            <img v-if="authStore.avatarUrl" :src="authStore.avatarUrl" class="user-avatar"
                 :alt="authStore.displayName" @error="onAvatarError" />
            <div class="user-ident">
              <div class="username">{{ authStore.displayName }}</div>
              <div v-if="authStore.displayName !== authStore.username" class="user-sso">{{ authStore.username }}</div>
            </div>
            <button class="btn btn-secondary" @click="handleLogout">Logout</button>
          </template>
          <router-link v-else to="/login" class="btn btn-primary">Login</router-link>
        </div>
      </div>
    </aside>

    <main class="main-content">
      <div v-if="activeNotifications.length" class="notification-banner">
        <div
          v-for="n in activeNotifications"
          :key="n.notificationid"
          class="notification-item"
          :class="getNotificationType(n)"
        >
          <span class="notification-text">{{ n.notification }}</span>
          <span class="notification-meta">
            <span v-if="n.starttime" class="notification-date">{{ formatDate(n.starttime) }}</span>
            <a
              v-if="n.ticketnumber"
              :href="`https://geit.service-now.com/now/nav/ui/search/0f8b85d0c7922010099a308dc7c2606a/params/search-term/${n.ticketnumber}/global-search-data-config-id/c861cea2c7022010099a308dc7c26041/back-button-label/IT4IT%20Homepage/search-context/now%2Fnav%2Fui`"
              target="_blank"
              class="notification-ticket"
            >{{ n.ticketnumber }}</a>
          </span>
        </div>
      </div>
      <router-view />
    </main>
    <ToastHost />
  </div>
</template>

<script setup>
import { ref, onMounted } from 'vue'
import { useRouter } from 'vue-router'
import ToastHost from '../components/ToastHost.vue'
import {
  Sun, Moon, LayoutDashboard, Calendar, Map, Cog, Monitor,
  Printer, Globe, Usb, AppWindow, BookOpen, BarChart3, Bell, Image, ShieldCheck
} from 'lucide-vue-next'
import { useAuthStore } from '../stores/auth'
import { currentTheme, toggleTheme } from '../stores/theme'
import { dashboardApi, notificationsApi } from '../api'

const router = useRouter()
const authStore = useAuthStore()
const searchQuery = ref('')
const navItems = ref([])
const activeNotifications = ref([])

// Map backend icon names to Lucide components
const iconMap = {
  'layout-dashboard': LayoutDashboard,
  'calendar': Calendar,
  'map': Map,
  'cog': Cog,
  'desktop': Monitor,
  'printer': Printer,
  'network-wired': Globe,
  'usb': Usb,
  'bell': Bell,
  'app-window': AppWindow,
  'book-open': BookOpen,
  'bar-chart-3': BarChart3,
  'image': Image,
  'shield': ShieldCheck,
}

// Default navigation (used as fallback if API fails)
const defaultNav = [
  { name: 'Dashboard', icon: 'layout-dashboard', route: '/', position: 0 },
  { name: 'Notifications', icon: 'bell', route: '/notifications', position: 5 },
  { name: 'Calendar', icon: 'calendar', route: '/calendar', position: 6 },
  { name: 'Map', icon: 'map', route: '/map', position: 4 },
  { name: 'Equipment', icon: 'cog', route: '/machines', position: 10 },
  { name: 'PCs', icon: 'desktop', route: '/pcs', position: 15 },
  { name: 'Network', icon: 'network-wired', route: '/network', position: 18 },
  { name: 'Printers', icon: 'printer', route: '/printers', position: 20 },
  { name: 'USB Devices', icon: 'usb', route: '/usb', position: 45 },
  { name: 'Applications', icon: 'app-window', route: '/applications', position: 30, section: 'information' },
  { name: 'Knowledge Base', icon: 'book-open', route: '/knowledgebase', position: 35 },
  { name: 'Reports', icon: 'bar-chart-3', route: '/reports', position: 40 },
]

function buildNavItems(items) {
  // Sort by position
  const sorted = [...items].sort((a, b) => (a.position || 99) - (b.position || 99))

  // Assign section headers based on position ranges
  const result = []
  let currentSection = null

  for (const item of sorted) {
    let section = null
    if (item.position >= 10 && item.position < 30 && currentSection !== 'Assets') {
      section = 'Assets'
      currentSection = 'Assets'
    } else if (item.section === 'information' || (item.position >= 30 && item.position < 50 && currentSection !== 'Information')) {
      if (currentSection !== 'Information') {
        section = 'Information'
        currentSection = 'Information'
      }
    }

    result.push({
      ...item,
      section,
      iconComponent: iconMap[item.icon] || null
    })
  }

  return result
}

onMounted(async () => {
  try {
    const response = await dashboardApi.navigation()
    navItems.value = buildNavItems(response.data.data || [])
  } catch (err) {
    navItems.value = buildNavItems(defaultNav)
  }

  try {
    const resp = await notificationsApi.active()
    activeNotifications.value = resp.data.data?.notifications || []
  } catch (err) {
    // Notifications banner is non-critical
  }
})

function getNotificationType(n) {
  const type = (n.typename || '').toLowerCase()
  if (type.includes('incident')) return 'type-incident'
  if (type.includes('change')) return 'type-change'
  if (type.includes('awareness')) return 'type-awareness'
  return 'type-default'
}

function formatDate(dateStr) {
  if (!dateStr) return ''
  const d = new Date(dateStr)
  return d.toLocaleDateString('en-US', { month: 'short', day: 'numeric', hour: 'numeric', minute: '2-digit' })
}

function performSearch() {
  if (searchQuery.value.trim()) {
    router.push({ path: '/search', query: { q: searchQuery.value.trim() } })
    searchQuery.value = ''
  }
}

async function handleLogout() {
  await authStore.logout()
  router.push('/login')
}

// Hide a broken avatar (photo filename set but file missing).
function onAvatarError(event) {
  event.target.style.display = 'none'
}
</script>

<style scoped>
.user-menu { display: flex; align-items: center; gap: 0.6rem; }
.user-avatar { width: 34px; height: 34px; border-radius: 50%; object-fit: cover; border: 1px solid var(--border); }
.user-ident { display: flex; flex-direction: column; line-height: 1.1; }
.user-sso { font-size: 0.72rem; color: var(--text-light); }
</style>
