import { LaunchDarklyFeatureAdapter } from '@vuetify/v0/features/adapters/launchdarkly'

pnpm add launchdarkly-js-client-sdk

import { createApp } from 'vue'
import { createFeaturesPlugin } from '@vuetify/v0/features'
import { LaunchDarklyFeatureAdapter } from '@vuetify/v0/features/adapters/launchdarkly'
import * as LDClient from 'launchdarkly-js-client-sdk'

const ldClient = LDClient.initialize('your-client-side-id', {
  key: 'user-123',
  email: '[email protected]'
})

await ldClient.waitUntilReady()

const adapter = new LaunchDarklyFeatureAdapter(ldClient)

const app = createApp(App)
app.use(createFeaturesPlugin({ adapter }))

import * as LDClient from 'launchdarkly-js-client-sdk'
import { LaunchDarklyFeatureAdapter } from '@vuetify/v0/features/adapters/launchdarkly'

const user = {
  key: 'user-123',
  name: 'John Doe',
  email: '[email protected]',
  custom: {
    plan: 'enterprise',
    beta: true
  }
}

const ldClient = LDClient.initialize('client-side-id', user)
await ldClient.waitUntilReady()

const adapter = new LaunchDarklyFeatureAdapter(ldClient)

<script setup lang="ts">
import { useFeatures } from '@vuetify/v0/features'
import { computed } from 'vue'

const features = useFeatures()

// Check boolean flag
const showNewFeature = computed(() => features.has('new-feature'))

// Get multivariate flag variation
const buttonStyle = computed(() => 
  features.variation('button-experiment', 'control')
)
</script>

<template>
  <div>
    <NewFeature v-if="showNewFeature" />
    
    <button :class="`btn-${buttonStyle}`">
      Click Me
    </button>
  </div>
</template>

const features = useFeatures()

// Check if feature is enabled
if (features.has('dark-mode')) {
  enableDarkMode()
}

// Get all enabled features
const enabledFeatures = features.selectedIds.value
// ['dark-mode', 'new-dashboard', 'beta-features']

const features = useFeatures()

// Get variation value with fallback
const layoutVariant = features.variation('layout-experiment', 'default')
// Returns: 'variant-a', 'variant-b', or 'default'

// Variation structure
interface FlagWithVariation {
  $value: boolean        // Always true for variations
  $variation: unknown    // Variation value (string, number, object, etc.)
}

const features = useFeatures()

const config = features.variation('app-config', {})
// Returns: { theme: 'dark', lang: 'en' }

const pricing = features.variation('pricing-tiers', [])
// Returns: [10, 20, 30]

import { watch } from 'vue'

const features = useFeatures()

watch(features.selectedIds, (newFlags, oldFlags) => {
  console.log('Enabled flags changed:', newFlags)
  
  // React to specific flag changes
  if (newFlags.includes('maintenance-mode') && !oldFlags.includes('maintenance-mode')) {
    showMaintenanceNotice()
  }
})

import { getCurrentInstance } from 'vue'
import type { LDClient } from 'launchdarkly-js-client-sdk'

const app = getCurrentInstance()?.appContext.app
const ldClient = app?.config.globalProperties.$ldClient as LDClient

// Identify new user
await ldClient.identify({
  key: 'user-456',
  email: '[email protected]',
  custom: {
    plan: 'pro'
  }
})

// Flags automatically update

// Boolean flag
{
  'feature-toggle': true
}
// Transformed to: { 'feature-toggle': true }

// String/Number/Object flag (multivariate)
{
  'experiment': 'variant-a'
}
// Transformed to:
{
  'experiment': {
    $value: true,
    $variation: 'variant-a'
  }
}

// JSON flag
{
  'config': { theme: 'dark', locale: 'en' }
}
// Transformed to:
{
  'config': {
    $value: true,
    $variation: { theme: 'dark', locale: 'en' }
  }
}

import * as LDClient from 'launchdarkly-js-client-sdk'

const clientId = import.meta.env.VITE_LAUNCHDARKLY_CLIENT_ID

const ldClient = LDClient.initialize(clientId, {
  key: 'anonymous-user',
  anonymous: true
})

await ldClient.waitUntilReady()

const adapter = new LaunchDarklyFeatureAdapter(ldClient)

import * as LDClient from 'launchdarkly-js-client-sdk'

const ldClient = LDClient.initialize('client-side-id', user, {
  streaming: false,
  useReport: false,
  bootstrap: {
    'feature-1': true,
    'feature-2': 'variant-a'
  }
})

const adapter = new LaunchDarklyFeatureAdapter(ldClient)

import type { LDClient } from 'launchdarkly-js-client-sdk'
import { LaunchDarklyFeatureAdapter } from '@vuetify/v0/features/adapters/launchdarkly'

const client: LDClient = LDClient.initialize('client-id', {
  key: 'user-123'
})

const adapter = new LaunchDarklyFeatureAdapter(client)

// Adapter is fully typed
adapter.setup((flags) => {
  // flags: FeaturesAdapterFlags
})

// Cleanup is automatic
const adapter = new LaunchDarklyFeatureAdapter(ldClient)

// On app unmount, adapter.dispose() is called
// This calls ldClient.off('change', updateFlags)

import { LaunchDarklyFeatureAdapter } from '@vuetify/v0/features/adapters/launchdarkly'
import { PostHogFeatureAdapter } from '@vuetify/v0/features/adapters/posthog'
import * as LDClient from 'launchdarkly-js-client-sdk'
import posthog from 'posthog-js'

const ldClient = LDClient.initialize('ld-client-id', { key: 'user' })
const phClient = posthog.init('ph-api-key')

await ldClient.waitUntilReady()

const ldAdapter = new LaunchDarklyFeatureAdapter(ldClient)
const phAdapter = new PostHogFeatureAdapter(phClient)

app.use(createFeaturesPlugin({
  adapter: [ldAdapter, phAdapter]
}))

// Flags from both sources are merged

class LaunchDarklyFeatureAdapter implements FeaturesAdapterInterface

constructor(client: LDClient)

type FeaturesAdapterFlags = Record<string, boolean | {
  $value: boolean
  $variation: unknown
}>