<template>
  <div
    class="min-h-screen flex items-start sm:items-center justify-center px-4 sm:px-6 lg:px-8 xl:px-12 2xl:px-16 py-8 sm:py-12">
    <div class="flex flex-col items-center justify-center space-y-3 sm:space-y-6 max-w-4xl mx-auto w-full mt-8 sm:mt-0">
      <!-- Welcome Section -->
      <div class="text-center space-y-2 sm:space-y-4">
        <div class="flex justify-center">
          <img src="@/assets/logo.png" alt="Logo" class="h-34 w-34 sm:h-42 sm:w-42 lg:h-50 lg:w-50" />
        </div>
        <div class="space-y-1 sm:space-y-3">
          <h1 class="text-2xl sm:text-3xl md:text-4xl font-bold tracking-tight">Welcome to the Virtual Realm</h1>
          <p class="text-sm sm:text-base md:text-xl text-muted-foreground max-w-md mx-auto px-4">
            Your secure platform for events and community management
          </p>
        </div>
      </div>

      <!-- Demo Account Creation Card -->
      <Card class="w-full max-w-md">
        <CardContent class="p-4 sm:p-6 md:p-8 space-y-4 sm:space-y-6">
          <!-- Demo Badge -->
          <div class="flex justify-center">
            <div
              class="inline-flex items-center gap-2 px-3 py-1 rounded-full bg-yellow-100 dark:bg-yellow-900/20 border border-yellow-200 dark:border-yellow-800">
              <div class="w-2 h-2 bg-yellow-500 rounded-full animate-pulse"></div>
              <span class="text-sm font-medium text-yellow-800 dark:text-yellow-200">Demo Mode</span>
            </div>
          </div>

          <!-- Mode Toggle -->
          <div class="flex justify-center">
            <div class="inline-flex rounded-lg bg-muted p-1">
              <Button variant="ghost" size="sm" :class="activeMode === 'demo' ? 'bg-background shadow-sm' : ''"
                @click="activeMode = 'demo'">
                Demo Account
              </Button>
              <Button variant="ghost" size="sm" :class="activeMode === 'login' ? 'bg-background shadow-sm' : ''"
                @click="activeMode = 'login'">
                Sign In
              </Button>
            </div>
          </div>

          <!-- Demo Mode Content -->
          <div v-if="activeMode === 'demo'" class="space-y-4 sm:space-y-6 relative">
            <!-- Loading Overlay -->
            <div v-if="isLoading" class="absolute inset-0 bg-background/80 backdrop-blur-sm z-10 flex flex-col items-center justify-center rounded-lg">
              <div class="flex flex-col items-center gap-3 text-center px-4">
                <div class="w-12 h-12 border-4 border-primary border-t-transparent rounded-full animate-spin"></div>
                <div>
                  <p class="text-sm font-medium">Creating your demo account...</p>
                  <p class="text-xs text-muted-foreground mt-1">This will only take a moment</p>
                </div>
              </div>
            </div>

            <!-- Demo Info -->
            <div class="text-center space-y-2 sm:space-y-3">
              <h2 class="text-lg sm:text-xl md:text-2xl font-semibold">Create Demo Account</h2>
              <p class="text-muted-foreground text-xs sm:text-sm leading-relaxed">
                Get instant access with a pre-funded demo account containing
                <span class="font-semibold text-green-600 dark:text-green-400">1,000,000 FAKE satoshis</span>
              </p>
            </div>

            <!-- Create Account Button -->
            <Button @click="createFakeAccount" :disabled="isLoading"
              class="w-full h-10 sm:h-12 text-base sm:text-lg font-medium" size="lg">
              {{ 'Create Demo Account' }}
            </Button>

            <!-- Info Text -->
            <p class="text-xs text-center text-muted-foreground">
              Your credentials will be generated automatically
            </p>
          </div>

          <!-- Login Mode Content -->
          <div v-else class="space-y-4 sm:space-y-6">
            <!-- Login Info -->
            <div class="text-center space-y-2 sm:space-y-3">
              <h2 class="text-lg sm:text-xl md:text-2xl font-semibold">Sign In</h2>
              <p class="text-muted-foreground text-xs sm:text-sm leading-relaxed">
                Sign in to your existing account
              </p>
            </div>

            <!-- Login Form -->
            <div class="space-y-4">
              <div class="space-y-2">
                <Label for="login-username">Username or Email</Label>
                <Input id="login-username" v-model="loginForm.username" placeholder="Enter your username or email"
                  @keydown.enter="handleLogin" />
              </div>
              <div class="space-y-2">
                <Label for="login-password">Password</Label>
                <Input id="login-password" type="password" v-model="loginForm.password"
                  placeholder="Enter your password" @keydown.enter="handleLogin" />
              </div>
            </div>

            <!-- Login Button -->
            <Button @click="handleLogin" :disabled="isLoading || !canLogin"
              class="w-full h-10 sm:h-12 text-base sm:text-lg font-medium" size="lg">
              <span v-if="isLoading" class="animate-spin mr-2">⚡</span>
              {{ isLoading ? 'Signing In...' : 'Sign In' }}
            </Button>
          </div>

          <!-- Error Display -->
          <p v-if="error" class="text-sm text-destructive text-center">
            {{ error }}
          </p>

          <!-- Success Message -->
          <div v-if="successMessage"
            class="text-sm text-green-600 dark:text-green-400 text-center bg-green-50 dark:bg-green-950/20 p-3 rounded-lg border border-green-200 dark:border-green-800">
            {{ successMessage }}
          </div>

          <!-- Demo Notice -->
          <div class="text-center space-y-2">
            <p class="text-xs text-muted-foreground">
              This is a demo environment. All transactions use fake satoshis for testing purposes.
            </p>
            <div class="flex items-center justify-center gap-1 text-xs text-amber-600 dark:text-amber-400">
              <svg class="w-3 h-3" fill="currentColor" viewBox="0 0 20 20">
                <path fill-rule="evenodd"
                  d="M8.257 3.099c.765-1.36 2.722-1.36 3.486 0l5.58 9.92c.75 1.334-.213 2.98-1.742 2.98H4.42c-1.53 0-2.493-1.646-1.743-2.98l5.58-9.92zM11 13a1 1 0 11-2 0 1 1 0 012 0zm-1-8a1 1 0 00-1 1v3a1 1 0 002 0V6a1 1 0 00-1-1z"
                  clip-rule="evenodd" />
              </svg>
              <span class="font-medium">Demo data may be erased at any time</span>
            </div>
          </div>
        </CardContent>
      </Card>
    </div>
  </div>
</template>

<script setup lang="ts">
import { ref, computed } from 'vue'
import { useRouter } from 'vue-router'
import { Card, CardContent } from '@/components/ui/card'
import { Button } from '@/components/ui/button'
import { Input } from '@/components/ui/input'
import { Label } from '@/components/ui/label'
import { auth } from '@/composables/useAuthService'
import { useDemoAccountGenerator } from '@/composables/useDemoAccountGenerator'
import { toast } from 'vue-sonner'

const router = useRouter()
const { isLoading, error, generateNewCredentials } = useDemoAccountGenerator()
const successMessage = ref('')
const activeMode = ref<'demo' | 'login'>('demo')

// Login form
const loginForm = ref({
  username: '',
  password: ''
})

const canLogin = computed(() => {
  return loginForm.value.username.trim() && loginForm.value.password.trim()
})

// Create fake account and automatically log in
async function createFakeAccount() {
  try {
    isLoading.value = true
    error.value = ''
    successMessage.value = ''

    // Generate credentials
    const credentials = generateNewCredentials()

    // Register the fake account
    await auth.register({
      username: credentials.username,
      email: credentials.email,
      password: credentials.password,
      password_repeat: credentials.password
    })

    // Show success with username
    successMessage.value = `Account created! Username: ${credentials.username}`
    toast.success(`Logged in as ${credentials.username}!`)

    // Redirect to home page after successful registration
    setTimeout(() => {
      router.push('/')
    }, 2000)

  } catch (err) {
    error.value = err instanceof Error ? err.message : 'Failed to create demo account'
    toast.error('Failed to create demo account. Please try again.')
  } finally {
    isLoading.value = false
  }
}

// Login with existing credentials
async function handleLogin() {
  if (!canLogin.value) return

  try {
    isLoading.value = true
    error.value = ''
    successMessage.value = ''

    await auth.login({
      username: loginForm.value.username,
      password: loginForm.value.password
    })

    successMessage.value = 'Login successful! Redirecting...'
    toast.success('Login successful!')

    // Redirect to home page after successful login
    setTimeout(() => {
      router.push('/')
    }, 1500)

  } catch (err) {
    error.value = err instanceof Error ? err.message : 'Login failed'
    toast.error('Login failed. Please check your credentials.')
  } finally {
    isLoading.value = false
  }
}
</script>
