<template>
  <div class="w-full max-w-2xl mx-auto space-y-4 sm:space-y-6 px-4 sm:px-6 pb-4 sm:pb-6">
    <!-- Header -->
    <div class="text-center pt-2 sm:pt-0">
      <h2 class="text-xl sm:text-2xl md:text-3xl font-bold text-gray-900">Créer un compte</h2>
      <p class="mt-2 text-xs sm:text-sm text-gray-500">Remplissez ça et après promis je vous embête plus</p>
    </div>

    <!-- Progress Bar -->
    <div class="pt-2 sm:pt-4">
      <div class="flex items-center justify-between mb-2">
        <span class="text-xs sm:text-sm font-medium text-gray-700">Étape {{ currentStep }} sur {{ totalSteps }}</span>
        <span class="text-xs sm:text-sm font-medium text-gray-500">{{ Math.round((currentStep / totalSteps) * 100) }}%</span>
      </div>
      <div class="w-full bg-gray-200 rounded-full h-2 sm:h-2.5">
        <div 
          class="bg-primary-600 h-2 sm:h-2.5 rounded-full transition-all duration-500 ease-in-out"
          :style="{ width: `${(currentStep / totalSteps) * 100}%` }"
        ></div>
      </div>
    </div>

    <!-- Step Content -->
    <div class="flex flex-col justify-center py-4 sm:py-6">
      <StepTransition :step="currentStep">
        <!-- Step 1: Welcome -->
        <div v-if="currentStep === 1" class="text-center px-2 sm:px-0">
          <br />
          <br />
          <br />
          <br />
          <h3 class="text-xl sm:text-2xl md:text-3xl font-bold text-gray-900 mb-3 sm:mb-4">Yo les ptits potes ! 🎉</h3>
          <p class="text-sm sm:text-base text-gray-600 max-w-md mx-auto leading-relaxed mb-6 sm:mb-8">
            Bienvenue sur LeDiscord ! Ici on partage nos vlogs, nos photos de soirées et on organise nos prochaines beuveries. 🍻
          </p>
          
          <!-- Minimalist features preview -->
          <div class="grid grid-cols-3 gap-2 sm:gap-4 max-w-md mx-auto mt-6 sm:mt-8">
            <div class="text-center">
              <div class="text-2xl sm:text-3xl mb-1">📹</div>
              <div class="text-xs sm:text-sm font-medium text-gray-700">Vlogs</div>
            </div>
            <div class="text-center">
              <div class="text-2xl sm:text-3xl mb-1">🍺</div>
              <div class="text-xs sm:text-sm font-medium text-gray-700">Événements</div>
            </div>
            <div class="text-center">
              <div class="text-2xl sm:text-3xl mb-1">📸</div>
              <div class="text-xs sm:text-sm font-medium text-gray-700">Albums</div>
            </div>
          </div>
        </div>

        <!-- Step 2: Registration Form -->
        <div v-if="currentStep === 2" class="w-full">
          <form @submit.prevent="nextStep" class="space-y-4 sm:space-y-6">
            <div class="grid grid-cols-1 md:grid-cols-2 gap-4 sm:gap-6">
              <div>
                <label for="email" class="label text-sm sm:text-base">Email</label>
                <input 
                  id="email" 
                  v-model="form.email" 
                  type="email" 
                  required 
                  class="input text-sm sm:text-base" 
                  placeholder="exemple@email.com"
                  @blur="touchedFields.email = true"
                >
              </div>
              <div>
                <label for="username" class="label text-sm sm:text-base">
                  Identifiant unique
                  <span class="text-xs text-gray-500 font-normal ml-1">(non modifiable)</span>
                </label>
                <input 
                  id="username" 
                  v-model="form.username" 
                  type="text" 
                  required 
                  minlength="3" 
                  class="input text-sm sm:text-base" 
                  placeholder="mon_pseudo"
                  @blur="touchedFields.username = true"
                >
              </div>
            </div>
            <div>
              <label for="full_name" class="label text-sm sm:text-base">
                Pseudo affiché
                <span class="text-xs text-gray-500 font-normal ml-1">(modifiable plus tard)</span>
              </label>
              <input 
                id="full_name" 
                v-model="form.full_name" 
                type="text" 
                required 
                class="input text-sm sm:text-base" 
                placeholder="Ton surnom / prénom"
                @blur="touchedFields.full_name = true"
              >
              <p class="text-xs text-gray-500 mt-1">C'est ce qui sera affiché aux autres membres</p>
            </div>
            <div class="grid grid-cols-1 md:grid-cols-2 gap-4 sm:gap-6">
              <div>
                <label for="password" class="label text-sm sm:text-base">Mot de passe</label>
                <input 
                  id="password" 
                  v-model="form.password" 
                  type="password" 
                  required 
                  minlength="6" 
                  class="input text-sm sm:text-base" 
                  placeholder="••••••••"
                  @blur="touchedFields.password = true"
                >
              </div>
              <div>
                <label for="password_confirm" class="label text-sm sm:text-base">Confirmer</label>
                <input 
                  id="password_confirm" 
                  v-model="form.password_confirm" 
                  type="password" 
                  required 
                  class="input text-sm sm:text-base" 
                  placeholder="••••••••"
                  @blur="touchedFields.password_confirm = true"
                >
              </div>
            </div>
            <PasswordStrength :password="form.password" />
            <div v-if="touchedFields.password_confirm && form.password_confirm && form.password !== form.password_confirm" class="flex items-center text-xs sm:text-sm text-red-600 mt-2">
              <svg class="w-4 h-4 mr-1 flex-shrink-0" fill="currentColor" viewBox="0 0 20 20">
                <path fill-rule="evenodd" d="M18 10a8 8 0 11-16 0 8 8 0 0116 0zm-7 4a1 1 0 11-2 0 1 1 0 012 0zm-1-9a1 1 0 00-1 1v4a1 1 0 102 0V6a1 1 0 00-1-1z" clip-rule="evenodd" />
              </svg>
              <span>Les mots de passe ne correspondent pas</span>
            </div>
          </form>
        </div>

        <!-- Step 3: Warning -->
        <div v-if="currentStep === 3" class="w-full px-2 sm:px-0 text-center">
          <h3 class="text-xl sm:text-2xl font-bold text-gray-900 mb-3 sm:mb-4">
            Version Bêta en cours ! 🚧
          </h3>
          
          <div class="bg-gradient-to-br from-yellow-50 to-orange-50 border-2 border-yellow-200 rounded-xl p-4 sm:p-6 max-w-lg mx-auto mb-4 sm:mb-6">
            <p class="text-sm sm:text-base text-gray-700 leading-relaxed mb-4">
              Je suis encore en train de peaufiner tout ça, donc si tu vois un bug ou que quelque chose te fait chier, <strong>dis-moi !</strong> 💬
            </p>
            <div class="flex items-center justify-center space-x-2 text-xs sm:text-sm text-gray-600">
              <span>🔧</span>
              <span>J'améliore au fur et à mesure</span>
            </div>
          </div>
          
          <div class="mt-4 sm:mt-6">
            <p class="text-xs sm:text-sm text-gray-700 mb-3 font-medium">Pour me signaler un problème, utilise le bouton ticket :</p>
            <div class="inline-flex items-center justify-center bg-primary-600 text-white rounded-full p-3 sm:p-4 shadow-lg">
              <svg class="w-5 h-5 sm:w-6 sm:h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 5v2m0 4v2m0 4v2M5 5a2 2 0 00-2 2v3a2 2 0 110 4v3a2 2 0 002 2h14a2 2 0 002-2v-3a2 2 0 110-4V7a2 2 0 00-2-2H5z" />
              </svg>
            </div>
            <p class="text-xs sm:text-sm text-gray-500 mt-3">
              Il se trouve en bas à droite de l'écran une fois connecté
            </p>
          </div>
        </div>

        <!-- Step 4: Interactive Tour -->
        <div v-if="currentStep === 4" class="w-full px-2 sm:px-0">
          <h3 class="text-xl sm:text-2xl font-bold text-gray-900 mb-4 sm:mb-6 text-center">Petite visite guidée 🗺️</h3>
          
          <div class="max-w-lg mx-auto">
            <!-- Tour Content -->
            <div class="bg-white border-2 border-gray-200 rounded-xl p-4 sm:p-6 mb-4 sm:mb-6 min-h-[280px] flex flex-col justify-center">
              <div v-if="tourStep === 0" class="text-center">
                <div class="text-4xl sm:text-5xl mb-4">🏠</div>
                <h4 class="text-lg sm:text-xl font-bold text-gray-900 mb-3">Accueil</h4>
                <p class="text-sm sm:text-base text-gray-600 mb-3">C'est ici que tu verras toutes les dernières activités de la communauté</p>
                <div class="bg-gray-50 rounded-lg p-3 text-left text-xs sm:text-sm text-gray-600">
                  <p class="mb-1">✨ <strong>Astuce :</strong> Tu peux liker, commenter et partager tout ce qui t'intéresse</p>
                  <p>🔔 Les notifications te tiendront au courant des nouvelles interactions</p>
                </div>
              </div>
              
              <div v-if="tourStep === 1" class="text-center">
                <div class="text-4xl sm:text-5xl mb-4">📅</div>
                <h4 class="text-lg sm:text-xl font-bold text-gray-900 mb-3">Événements</h4>
                <p class="text-sm sm:text-base text-gray-600 mb-3">Organise et participe aux prochaines soirées et beuveries</p>
                <div class="bg-gray-50 rounded-lg p-3 text-left text-xs sm:text-sm text-gray-600">
                  <p class="mb-1">📝 <strong>Crée un événement :</strong> Date, lieu, description, le tout en quelques clics</p>
                  <p>✅ <strong>Participe :</strong> Indique ta présence et vois qui vient</p>
                </div>
              </div>
              
              <div v-if="tourStep === 2" class="text-center">
                <div class="text-4xl sm:text-5xl mb-4">📸</div>
                <h4 class="text-lg sm:text-xl font-bold text-gray-900 mb-3">Albums</h4>
                <p class="text-sm sm:text-base text-gray-600 mb-3">Partage tes meilleures photos de soirées et de moments entre potes</p>
                <div class="bg-gray-50 rounded-lg p-3 text-left text-xs sm:text-sm text-gray-600">
                  <p class="mb-1">📁 <strong>Crée un album :</strong> Regroupe tes photos par événement ou thème</p>
                  <p>💾 <strong>Upload multiple :</strong> Ajoute plusieurs photos d'un coup</p>
                </div>
              </div>
              
              <div v-if="tourStep === 3" class="text-center">
                <div class="text-4xl sm:text-5xl mb-4">📹</div>
                <h4 class="text-lg sm:text-xl font-bold text-gray-900 mb-3">Vlogs</h4>
                <p class="text-sm sm:text-base text-gray-600 mb-3">Regarde et partage tes vlogs avec la communauté</p>
                <div class="bg-gray-50 rounded-lg p-3 text-left text-xs sm:text-sm text-gray-600">
                  <p class="mb-1">🎬 <strong>Upload un vlog :</strong> Vidéos jusqu'à 500MB, avec thumbnail personnalisé</p>
                  <p>👀 <strong>Statistiques :</strong> Vues, replays, likes, tout est tracké</p>
                </div>
              </div>
              
              <div v-if="tourStep === 4" class="text-center">
                <div class="text-4xl sm:text-5xl mb-4">💬</div>
                <h4 class="text-lg sm:text-xl font-bold text-gray-900 mb-3">Publications</h4>
                <p class="text-sm sm:text-base text-gray-600 mb-3">Discute, partage et échange avec tout le monde</p>
                <div class="bg-gray-50 rounded-lg p-3 text-left text-xs sm:text-sm text-gray-600">
                  <p class="mb-1">@<strong>Mentions :</strong> Tag tes potes avec @nom_utilisateur</p>
                  <p>📎 <strong>Médias :</strong> Ajoute des images directement dans tes posts</p>
                </div>
              </div>
            </div>
            
            <!-- Tour Navigation -->
            <div class="flex items-center justify-between">
              <button
                @click="tourStep = Math.max(0, tourStep - 1)"
                :disabled="tourStep === 0"
                class="px-3 sm:px-4 py-2 text-xs sm:text-sm font-medium text-gray-700 bg-gray-100 rounded-lg hover:bg-gray-200 disabled:opacity-50 disabled:cursor-not-allowed transition-colors"
              >
                ← Précédent
              </button>
              
              <div class="flex space-x-2">
                <div 
                  v-for="i in 5" 
                  :key="i"
                  class="w-2 h-2 rounded-full transition-all duration-300"
                  :class="tourStep === i - 1 ? 'bg-primary-600 w-6' : 'bg-gray-300'"
                ></div>
              </div>
              
              <button
                @click="tourStep = Math.min(4, tourStep + 1)"
                :disabled="tourStep === 4"
                class="px-3 sm:px-4 py-2 text-xs sm:text-sm font-medium text-gray-700 bg-gray-100 rounded-lg hover:bg-gray-200 disabled:opacity-50 disabled:cursor-not-allowed transition-colors"
              >
                Suivant →
              </button>
            </div>
          </div>
        </div>

        <!-- Step 5: Install App -->
        <div v-if="currentStep === 5" class="w-full px-2 sm:px-0 text-center">
          <h3 class="text-xl sm:text-2xl font-bold text-gray-900 mb-3 sm:mb-4">
            Ah et tiens... 📱
          </h3>
          
          <p class="text-sm sm:text-base text-gray-600 max-w-md mx-auto leading-relaxed mb-6 sm:mb-8">
            Prends l'app, ce sera plus sympa sur mobile ! Accès rapide, notifications, et tout ça directement depuis ton téléphone.
          </p>
          
          <div class="bg-gradient-to-br from-primary-50 to-purple-50 border-2 border-primary-200 rounded-xl p-4 sm:p-6 max-w-md mx-auto mb-6">
            <div class="flex items-center justify-center space-x-3 mb-4">
              <div class="text-3xl">📱</div>
              <div class="text-3xl">→</div>
              <div class="text-3xl">✨</div>
            </div>
            <p class="text-xs sm:text-sm text-gray-700 mb-4">
              Une fois connecté, tu pourras installer l'app depuis le menu de ton profil
            </p>
            <button
              v-if="deferredPrompt || isMobile"
              @click="handleInstallApp"
              class="w-full sm:w-auto bg-primary-600 hover:bg-primary-700 text-white font-medium py-3 px-6 rounded-lg shadow-lg hover:shadow-xl transition-all duration-200 transform hover:scale-105 text-sm sm:text-base"
            >
              <div class="flex items-center justify-center space-x-2">
                <svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                  <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 18h.01M8 21h8a2 2 0 002-2V5a2 2 0 00-2-2H8a2 2 0 00-2 2v14a2 2 0 002 2z" />
                </svg>
                <span>{{ deferredPrompt ? 'Installer l\'app maintenant' : 'Voir les instructions' }}</span>
              </div>
            </button>
            <p v-else class="text-xs sm:text-sm text-gray-500">
              Le bouton d'installation apparaîtra automatiquement quand tu seras connecté
            </p>
          </div>
        </div>
      </StepTransition>
    </div>

    <!-- Navigation Buttons -->
    <div class="flex flex-col sm:flex-row items-stretch sm:items-center gap-3 sm:gap-4 pt-4 sm:pt-6" :class="currentStep > 1 ? 'sm:justify-between' : 'sm:justify-end'">
      <button
        v-if="currentStep > 1"
        @click="previousStep"
        class="btn-secondary w-full sm:w-auto order-2 sm:order-1 text-sm sm:text-base py-2.5 sm:py-2"
        :disabled="loading"
      >
        Précédent
      </button>

      <button
        v-if="currentStep < totalSteps"
        @click="nextStep"
        :disabled="!canProceed || loading"
        class="btn-primary bg-gradient-to-r from-primary-500 to-purple-600 w-full sm:w-auto order-1 sm:order-2 text-sm sm:text-base py-2.5 sm:py-2"
        :class="{ 'opacity-50 cursor-not-allowed': !canProceed || loading }"
      >
        Suivant
      </button>

      <button
        v-if="currentStep === totalSteps"
        @click="handleRegister"
        :disabled="loading || !canProceed"
        class="btn-primary bg-gradient-to-r from-primary-500 to-purple-600 w-full sm:w-auto order-1 sm:order-2 text-sm sm:text-base py-2.5 sm:py-2"
        :class="{ 'opacity-50 cursor-not-allowed': loading || !canProceed }"
      >
        <span v-if="loading">Création en cours...</span>
        <span v-else>Créer mon compte</span>
      </button>
    </div>
    
    <div v-if="error" class="mt-4 text-center text-xs sm:text-sm text-red-600 px-2">
      {{ error }}
    </div>

    <!-- Login Link -->
    <div class="mt-6 sm:mt-8 text-center pb-4 sm:pb-0">
      <p class="text-xs sm:text-sm text-gray-600">
        Déjà un compte ?
        <router-link to="/login" class="font-medium text-primary-600 hover:text-primary-500 transition-colors">
          Se connecter
        </router-link>
      </p>
    </div>

    <!-- PWA Install Tutorial -->
    <PWAInstallTutorial 
      :show="showPWAInstructions"
      :is-ios="isIOS"
      :is-android="isAndroid"
      :is-windows="isWindows"
      :is-mac="isMac"
      @close="showPWAInstructions = false"
    />
  </div>
</template>

<script setup>
import { ref, computed, onMounted, onBeforeUnmount } from 'vue'
import { useRouter } from 'vue-router'
import { useAuthStore } from '@/stores/auth'
import StepTransition from '@/components/StepTransition.vue'
import PasswordStrength from '@/components/PasswordStrength.vue'
import FormValidation from '@/components/FormValidation.vue'
import PWAInstallTutorial from '@/components/PWAInstallTutorial.vue'

const authStore = useAuthStore()
const router = useRouter()

// Step management
const currentStep = ref(1)
const totalSteps = 5
const tourStep = ref(0)
const deferredPrompt = ref(null)

// Form data
const form = ref({
  email: '',
  username: '',
  full_name: '',
  password: '',
  password_confirm: ''
})

const touchedFields = ref({
  email: false,
  username: false,
  full_name: false,
  password: false,
  password_confirm: false
})

const loading = ref(false)
const error = ref('')

// Features for the tour
const features = ref([
  { 
    title: 'Posts & Discussions', 
    description: 'Partagez vos idées et participez.',
    icon: '<svg class="w-6 h-6 text-blue-600" 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"></path></svg>'
  },
  { 
    title: 'Vlogs & Vidéos', 
    description: 'Regardez des vidéos de la communauté.',
    icon: '<svg class="w-6 h-6 text-red-600" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 10l4.553-2.276A1 1 0 0121 8.618v6.764a1 1 0 01-1.447.894L15 14M5 18h8a2 2 0 002-2V8a2 2 0 00-2-2H5a2 2 0 00-2 2v8a2 2 0 002 2z"></path></svg>'
  },
  { 
    title: 'Événements', 
    description: 'Participez à des rencontres.',
    icon: '<svg class="w-6 h-6 text-green-600" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 7V3m8 4V3m-9 8h10M5 21h14a2 2 0 002-2V7a2 2 0 00-2-2H5a2 2 0 00-2 2v12a2 2 0 002 2z"></path></svg>'
  }
])

// Computed properties
const canProceed = computed(() => {
  if (currentStep.value === 2) {
    return form.value.email && form.value.username && form.value.full_name && 
           form.value.password && form.value.password.length >= 6 &&
           form.value.password === form.value.password_confirm
  }
  return true
})

// Methods
function nextStep() {
  if (currentStep.value < totalSteps && canProceed.value) {
    currentStep.value++
    // Reset tour step when entering step 4
    if (currentStep.value === 4) {
      tourStep.value = 0
    }
  }
}

function previousStep() {
  if (currentStep.value > 1) {
    currentStep.value--
  }
}

async function handleRegister() {
  error.value = ''
  if (!canProceed.value) return

  loading.value = true
  const result = await authStore.register({
    email: form.value.email,
    username: form.value.username,
    full_name: form.value.full_name,
    password: form.value.password
  })
  
  if (result.success) {
    router.push('/')
  } else {
    error.value = result.error || 'Une erreur est survenue lors de l\'inscription.'
  }
  loading.value = false
}

// PWA Installation
const isMobile = ref(false)
const showPWAInstructions = ref(false)

const isIOS = computed(() => /iPhone|iPad|iPod/i.test(navigator.userAgent))
const isAndroid = computed(() => /Android/i.test(navigator.userAgent))
const isWindows = computed(() => /Windows/i.test(navigator.userAgent))
const isMac = computed(() => /Macintosh|Mac OS/i.test(navigator.userAgent) && !isIOS.value)

function checkIfMobile() {
  isMobile.value = /iPhone|iPad|iPod|Android/i.test(navigator.userAgent) || 
                   window.innerWidth < 768
}

function handleBeforeInstallPrompt(e) {
  e.preventDefault()
  deferredPrompt.value = e
}

async function handleInstallApp() {
  if (deferredPrompt.value) {
    try {
      deferredPrompt.value.prompt()
      const { outcome } = await deferredPrompt.value.userChoice
      
      if (outcome === 'accepted') {
        console.log('✅ PWA installée avec succès')
      }
      
      deferredPrompt.value = null
    } catch (error) {
      console.error('Erreur lors de l\'installation:', error)
    }
  } else {
    // Si pas de beforeinstallprompt, afficher les instructions (mobile ou desktop)
    showPWAInstructions.value = true
  }
}

onMounted(() => {
  checkIfMobile()
  window.addEventListener('beforeinstallprompt', handleBeforeInstallPrompt)
  window.addEventListener('resize', checkIfMobile)
})

onBeforeUnmount(() => {
  window.removeEventListener('beforeinstallprompt', handleBeforeInstallPrompt)
  window.removeEventListener('resize', checkIfMobile)
})
</script>
