<script setup lang="ts">
import { computed, ref, watch } from 'vue'
import { RouterLink, RouterView, useRoute } from 'vue-router'
import {
  AlertTriangle,
  BarChart3,
  CalendarCog,
  ClipboardList,
  Film,
  LayoutDashboard,
  FileClock,
  Menu,
  Settings,
  Tags,
  Trophy,
  UserCog,
  Users,
  FileText,
  X,
} from '@lucide/vue'

import AdminToastViewport from '../../components/admin/AdminToastViewport.vue'
import Card from '../../components/ui/Card.vue'
import { getRiskMetricValue } from '../../lib/adminMetrics'
import { useAwardsStore } from '../../stores/awards'
import { useAuthStore } from '../../stores/auth'

const route = useRoute()
const store = useAwardsStore()
const authStore = useAuthStore()
const openRiskCount = computed(() => getRiskMetricValue(store.admin.metrics))
const pendingClipCount = computed(() => store.adminSeasonDetail.clipSubmissions.filter((clip) => clip.status === 'pending').length)
const adminWorkspaceLoading = ref(false)
const adminWorkspaceLoaded = ref(false)
const mobileNavOpen = ref(false)

const fullNavGroups = computed(() => [
  {
    label: 'Betrieb',
    items: [
      { label: 'Dashboard', to: '/admin/dashboard', description: 'Live-Lage und Aufgaben', icon: LayoutDashboard, permission: 'dashboard', badge: () => null },
      { label: 'Nominierungen', to: '/admin/nominations', description: 'Eingang und Backlog', icon: ClipboardList, permission: 'nominations', badge: () => `${store.adminSeasonDetail.pendingNominations.length}` },
    ],
  },
  {
    label: 'Inhalte',
    items: [
      { label: 'Jahre', to: '/admin/years', description: 'Jahresstatus und Setup', icon: CalendarCog, permission: 'years', badge: () => `${store.adminSeasons.length}` },
      { label: 'Kategorien', to: '/admin/categories', description: 'Struktur und Limits', icon: Tags, permission: 'categories', badge: () => `${store.adminSeasonDetail.categories.length}` },
      { label: 'Kandidaten', to: '/admin/candidates', description: 'Kandidatenbasis pflegen', icon: Users, permission: 'candidates', badge: () => `${store.adminSeasonDetail.candidates.length}` },
      { label: 'Clips', to: '/admin/clips', description: 'Clip-Einreichungen prüfen', icon: Film, permission: 'clips', badge: () => `${pendingClipCount.value}` },
      { label: 'Landingpage', to: '/admin/content', description: 'FAQ, Footer und Datenschutz', icon: FileText, permission: 'content', badge: () => null },
    ],
  },
  {
    label: 'Kontrolle',
    items: [
      { label: 'Risiko', to: '/admin/risk', description: 'Flags entscheiden', icon: AlertTriangle, permission: 'risk', badge: () => `${openRiskCount.value}` },
      { label: 'Team', to: '/admin/team', description: 'Logins und Rollen', icon: UserCog, permission: 'team', badge: () => null },
      { label: 'Audit-Log', to: '/admin/users-logs', description: 'Admin-Aktionen', icon: FileClock, permission: 'audit', badge: () => null },
    ],
  },
  {
    label: 'Auswertung',
    items: [
      { label: 'Analytics', to: '/admin/analytics', description: 'Metriken und Rankings', icon: BarChart3, permission: 'analytics', badge: () => null },
      { label: 'Gewinner', to: '/admin/winners', description: 'Finale Ergebnisse freigeben', icon: Trophy, permission: 'winners', badge: () => `${store.adminSeasonDetail.results.length}` },
      { label: 'Einstellungen', to: '/admin/settings', description: 'Systemchecks und Status', icon: Settings, permission: 'settings', badge: () => null },
    ],
  },
])

const navGroups = computed(() => {
  return fullNavGroups.value
    .map((group) => ({
      ...group,
      items: group.items.filter((item) => !item.permission || authStore.hasPermission(item.permission)),
    }))
    .filter((group) => group.items.length > 0)
})

const currentSeason = computed(() => store.adminSeasonDetail)
function isActive(to: string) {
  return route.path === to
}

// Close mobile nav on route change
watch(() => route.path, () => {
  mobileNavOpen.value = false
})

async function ensureAdminWorkspace() {
  if (!authStore.hydrated || !authStore.canAccessAdmin || adminWorkspaceLoading.value) return
  if (adminWorkspaceLoaded.value && store.apiMode === 'api') return

  adminWorkspaceLoading.value = true
  try {
    if (authStore.canManageAdminWorkspace) {
      await store.initializeAdminWorkspace()
    } else if (authStore.hasPermission('content') || authStore.hasPermission('settings')) {
      await store.loadAdminContentWorkspace()
    }
    adminWorkspaceLoaded.value = true
  } finally {
    adminWorkspaceLoading.value = false
  }
}

watch(
  () => [authStore.hydrated, authStore.canAccessAdmin, authStore.canManageAdminWorkspace, route.path] as const,
  () => {
    void ensureAdminWorkspace()
  },
  { immediate: true },
)
</script>

<template>
  <AdminToastViewport />

  <!-- Mobile top bar -->
  <div class="sticky top-0 z-40 flex items-center gap-3 border-b border-violet-100 bg-white/90 px-4 py-3 backdrop-blur-sm xl:hidden">
    <button
      type="button"
      class="grid h-9 w-9 shrink-0 place-items-center rounded-xl border border-violet-200 text-violet-600 transition hover:bg-violet-50"
      aria-label="Navigation öffnen"
      @click="mobileNavOpen = true"
    >
      <Menu class="h-5 w-5" />
    </button>
    <div class="min-w-0 flex-1">
      <p class="truncate text-sm font-bold text-violet-900">
        {{ currentSeason.year ? `Admin · ${currentSeason.year}` : 'Admin' }}
      </p>
      <p class="truncate text-xs text-slate-500">{{ currentSeason.currentPhase || currentSeason.name || 'Kein Jahr gewählt' }}</p>
    </div>
    <div v-if="store.adminSeasonDetail.pendingNominations.length > 0" class="shrink-0">
      <span class="grid h-6 min-w-6 place-items-center rounded-full border border-violet-200 bg-violet-50 px-2 text-[11px] font-bold text-violet-700">
        {{ store.adminSeasonDetail.pendingNominations.length }}
      </span>
    </div>
  </div>

  <!-- Mobile drawer (Teleport to body) -->
  <Teleport to="body">
    <Transition
      enter-active-class="transition duration-200"
      enter-from-class="opacity-0"
      enter-to-class="opacity-100"
      leave-active-class="transition duration-150"
      leave-from-class="opacity-100"
      leave-to-class="opacity-0"
    >
      <div v-if="mobileNavOpen" class="fixed inset-0 z-50 xl:hidden" @click.self="mobileNavOpen = false">
        <!-- Backdrop -->
        <div class="absolute inset-0 bg-slate-950/40 backdrop-blur-sm" @click="mobileNavOpen = false" />

        <!-- Drawer panel -->
        <Transition
          enter-active-class="transition duration-200"
          enter-from-class="-translate-x-full"
          enter-to-class="translate-x-0"
          leave-active-class="transition duration-150"
          leave-from-class="translate-x-0"
          leave-to-class="-translate-x-full"
        >
          <div v-if="mobileNavOpen" class="absolute inset-y-0 left-0 flex w-72 flex-col gap-3 overflow-y-auto bg-white/98 p-3 shadow-2xl backdrop-blur-md">
            <!-- Drawer header -->
            <div class="flex items-center justify-between gap-3 px-1 py-1">
              <div class="min-w-0">
                <p class="text-[10px] font-semibold uppercase tracking-[0.18em] text-violet-500">Admin</p>
                <p class="truncate text-sm font-bold text-violet-900">{{ currentSeason.year || 'Kein Jahr' }} · {{ currentSeason.currentPhase || '–' }}</p>
              </div>
              <button
                type="button"
                class="grid h-8 w-8 shrink-0 place-items-center rounded-xl border border-violet-200 text-violet-600 transition hover:bg-violet-50"
                aria-label="Navigation schließen"
                @click="mobileNavOpen = false"
              >
                <X class="h-4 w-4" />
              </button>
            </div>

            <!-- Nav groups -->
            <nav class="space-y-4">
              <section v-for="group in navGroups" :key="group.label" class="space-y-1.5">
                <p class="px-2 text-[10px] font-semibold uppercase tracking-[0.2em] text-slate-400">{{ group.label }}</p>
                <RouterLink
                  v-for="item in group.items"
                  :key="item.to"
                  :to="item.to"
                  class="group block rounded-2xl border px-3 py-2.5 transition"
                  :class="isActive(item.to) ? 'border-violet-200 bg-gradient-to-br from-violet-50 via-white to-[#f7eef8] text-violet-950 shadow-[0_14px_34px_rgba(168,145,214,0.14)]' : 'border-transparent bg-white/55 text-slate-700 hover:border-violet-100 hover:bg-violet-50/70'"
                >
                  <div class="flex items-center gap-3">
                    <div
                      class="grid h-9 w-9 shrink-0 place-items-center rounded-xl transition"
                      :class="isActive(item.to) ? 'bg-white text-violet-700 shadow-sm' : 'bg-violet-50 text-violet-600 group-hover:bg-white'"
                    >
                      <component :is="item.icon" class="h-4.5 w-4.5" />
                    </div>
                    <div class="min-w-0 flex-1">
                      <div class="flex min-w-0 items-center justify-between gap-3">
                        <p class="truncate text-sm font-semibold leading-5">{{ item.label }}</p>
                        <span
                          v-if="item.badge()"
                          class="grid h-6 min-w-6 shrink-0 place-items-center rounded-full border border-violet-200 bg-white px-2 text-[11px] font-semibold text-violet-700 shadow-sm"
                        >
                          {{ item.badge() }}
                        </span>
                      </div>
                      <p class="mt-0.5 truncate text-xs leading-5 text-slate-500">{{ item.description }}</p>
                    </div>
                  </div>
                </RouterLink>
              </section>
            </nav>
          </div>
        </Transition>
      </div>
    </Transition>
  </Teleport>

  <div class="admin-panel pb-10 pt-4 xl:pt-0">
    <div class="grid gap-6 xl:grid-cols-[292px_minmax(0,1fr)]">
      <main class="order-1 min-w-0 xl:order-2">
        <RouterView />
      </main>

      <!-- Desktop sidebar (hidden on mobile) -->
      <aside class="order-2 hidden space-y-3 xl:order-1 xl:block xl:sticky xl:top-4 xl:h-fit">
        <Card class="p-3">
          <nav class="space-y-4">
            <section v-for="group in navGroups" :key="group.label" class="space-y-1.5">
              <p class="px-2 text-[10px] font-semibold uppercase tracking-[0.2em] text-slate-400">{{ group.label }}</p>
              <RouterLink
                v-for="item in group.items"
                :key="item.to"
                :to="item.to"
                class="group block rounded-2xl border px-3 py-2.5 transition"
                :class="isActive(item.to) ? 'border-violet-200 bg-gradient-to-br from-violet-50 via-white to-[#f7eef8] text-violet-950 shadow-[0_14px_34px_rgba(168,145,214,0.14)]' : 'border-transparent bg-white/55 text-slate-700 hover:border-violet-100 hover:bg-violet-50/70'"
              >
                <div class="flex items-center gap-3">
                  <div
                    class="grid h-9 w-9 shrink-0 place-items-center rounded-xl transition"
                    :class="isActive(item.to) ? 'bg-white text-violet-700 shadow-sm' : 'bg-violet-50 text-violet-600 group-hover:bg-white'"
                  >
                    <component :is="item.icon" class="h-4.5 w-4.5" />
                  </div>
                  <div class="min-w-0 flex-1">
                    <div class="flex min-w-0 items-center justify-between gap-3">
                      <p class="truncate text-sm font-semibold leading-5">{{ item.label }}</p>
                      <span
                        v-if="item.badge()"
                        class="grid h-6 min-w-6 shrink-0 place-items-center rounded-full border border-violet-200 bg-white px-2 text-[11px] font-semibold text-violet-700 shadow-sm"
                      >
                        {{ item.badge() }}
                      </span>
                    </div>
                    <p class="mt-0.5 truncate text-xs leading-5 text-slate-500">{{ item.description }}</p>
                  </div>
                </div>
              </RouterLink>
            </section>
          </nav>
        </Card>
      </aside>
    </div>
  </div>
</template>
