import type { SubBlockConfig } from '@/blocks/types'
import type { TriggerOutput } from '@/triggers/types'

/**
 * Shared trigger dropdown options for all RevenueCat triggers.
 * All RevenueCat events POST to the same webhook endpoint; the active trigger is
 * differentiated by `event.type` at match time.
 */
export const revenueCatTriggerOptions = [
  { label: 'Initial Purchase', id: 'revenuecat_initial_purchase' },
  { label: 'Renewal', id: 'revenuecat_renewal' },
  { label: 'Cancellation', id: 'revenuecat_cancellation' },
  { label: 'Expiration', id: 'revenuecat_expiration' },
  { label: 'Non-Renewing Purchase', id: 'revenuecat_non_renewing_purchase' },
  { label: 'Product Change', id: 'revenuecat_product_change' },
]

/**
 * Maps each RevenueCat trigger ID to the exact uppercase `event.type` string
 * RevenueCat sends in the webhook payload.
 */
export const REVENUECAT_TRIGGER_TO_EVENT_TYPE: Record<string, string> = {
  revenuecat_initial_purchase: 'INITIAL_PURCHASE',
  revenuecat_renewal: 'RENEWAL',
  revenuecat_cancellation: 'CANCELLATION',
  revenuecat_expiration: 'EXPIRATION',
  revenuecat_non_renewing_purchase: 'NON_RENEWING_PURCHASE',
  revenuecat_product_change: 'PRODUCT_CHANGE',
}

/**
 * Maps each RevenueCat trigger ID to the lowercase `WebhookEventType` enum value
 * the REST API v2 expects when creating a webhook integration.
 *
 * @see https://www.revenuecat.com/docs/api-v2 (Integration > Create a webhook integration)
 */
export const REVENUECAT_TRIGGER_TO_API_EVENT_TYPE: Record<string, string> = {
  revenuecat_initial_purchase: 'initial_purchase',
  revenuecat_renewal: 'renewal',
  revenuecat_cancellation: 'cancellation',
  revenuecat_expiration: 'expiration',
  revenuecat_non_renewing_purchase: 'non_renewing_purchase',
  revenuecat_product_change: 'product_change',
}

/**
 * Generate setup instructions for a specific RevenueCat event type.
 *
 * Sim creates and tears down the webhook integration automatically through the
 * RevenueCat REST API v2, so the user only supplies a Secret API key and the
 * project ID — no manual dashboard webhook configuration is required.
 */
export function revenueCatSetupInstructions(eventLabel: string): string {
  const instructions = [
    'In the RevenueCat dashboard, go to <strong>Project settings > API keys</strong> and create a <strong>v2 Secret API key</strong> with the <code>project_configuration:integrations:read_write</code> permission.',
    'Paste the Secret API key into the <strong>API Key</strong> field below.',
    'Enter your <strong>Project ID</strong> (the <code>proj...</code> identifier shown in your project settings or the dashboard URL) in the <strong>Project ID</strong> field below.',
    'Optionally restrict the trigger to a single <strong>Environment</strong> (Production or Sandbox). Leave it on <strong>All</strong> to receive both.',
    `Sim creates the webhook integration in RevenueCat automatically when you deploy and removes it when you undeploy. This trigger fires on <strong>${eventLabel}</strong> events.`,
    'Sim generates the Authorization header secret for you and verifies every incoming request against it — you do not need to set it manually.',
    'Click "Save" above to deploy and activate your trigger.',
  ]
  return instructions
    .map(
      (instruction, index) =>
        `<div class="mb-3"><strong>${index + 1}.</strong> ${instruction}</div>`
    )
    .join('')
}

/**
 * Extra trigger fields shared by all RevenueCat triggers.
 *
 * `apiKey` (a RevenueCat v2 Secret API key) and `projectId` let Sim create and
 * delete the webhook integration through the REST API v2 during deploy/undeploy.
 * `environment` optionally scopes the integration to production or sandbox.
 * The Authorization header secret is generated by Sim during registration and
 * stored in `providerConfig.authHeaderSecret`; the provider handler verifies
 * every incoming `Authorization` header against it.
 */
export function buildRevenueCatExtraFields(triggerId: string): SubBlockConfig[] {
  const condition = { field: 'selectedTriggerId', value: triggerId }
  return [
    {
      id: 'apiKey',
      title: 'API Key',
      type: 'short-input',
      password: true,
      paramVisibility: 'user-only',
      placeholder: 'RevenueCat v2 Secret API key (sk_...)',
      description:
        'Secret API key with the project_configuration:integrations:read_write permission. Sim uses it to create and remove the webhook in RevenueCat.',
      required: true,
      mode: 'trigger',
      condition,
    },
    {
      id: 'projectId',
      title: 'Project ID',
      type: 'short-input',
      placeholder: 'proj1ab2c3d4',
      description: 'RevenueCat project identifier the webhook integration is created in.',
      required: true,
      mode: 'trigger',
      condition,
    },
    {
      id: 'environment',
      title: 'Environment',
      type: 'dropdown',
      options: [
        { label: 'All', id: 'all' },
        { label: 'Production', id: 'production' },
        { label: 'Sandbox', id: 'sandbox' },
      ],
      value: () => 'all',
      description: 'Restrict events to a single environment, or receive all of them.',
      mode: 'trigger',
      condition,
    },
  ]
}

/**
 * Build the output schema for RevenueCat events.
 *
 * Fields are flattened from the `event` object of the webhook payload
 * (RevenueCat wraps the event under `event` and the wrapper carries `api_version`).
 * Event-specific fields (`new_product_id`, `cancel_reason`, `expiration_reason`) are
 * present for all triggers and are `null` when not applicable to the received event type.
 *
 * @see https://www.revenuecat.com/docs/integrations/webhooks/event-types-and-fields
 */
export function buildRevenueCatOutputs(): Record<string, TriggerOutput> {
  return {
    type: { type: 'string', description: 'Event type (e.g., INITIAL_PURCHASE, RENEWAL)' },
    id: { type: 'string', description: 'Unique event identifier' },
    app_id: { type: 'string', description: 'RevenueCat app public identifier' },
    event_timestamp_ms: {
      type: 'number',
      description: 'Timestamp (ms since epoch) when the event was generated',
    },
    app_user_id: { type: 'string', description: 'Current App User ID' },
    original_app_user_id: { type: 'string', description: 'First App User ID ever used' },
    aliases: { type: 'json', description: 'All App User IDs ever used by the subscriber' },
    product_id: { type: 'string', description: 'Product identifier' },
    new_product_id: {
      type: 'string',
      description: 'Product identifier changed to (PRODUCT_CHANGE events only)',
    },
    period_type: {
      type: 'string',
      description: 'Period type (TRIAL, INTRO, NORMAL, PROMOTIONAL, or PREPAID)',
    },
    purchased_at_ms: { type: 'number', description: 'Purchase timestamp (ms since epoch)' },
    expiration_at_ms: {
      type: 'number',
      description: 'Expiration timestamp (ms since epoch), nullable',
    },
    environment: { type: 'string', description: 'Environment (SANDBOX or PRODUCTION)' },
    entitlement_id: { type: 'string', description: 'Deprecated single entitlement identifier' },
    entitlement_ids: { type: 'json', description: 'Associated entitlement identifiers' },
    presented_offering_id: {
      type: 'string',
      description: 'Identifier of the offering presented to the user',
    },
    transaction_id: { type: 'string', description: 'Store transaction ID' },
    original_transaction_id: {
      type: 'string',
      description: 'Original subscription transaction ID',
    },
    is_family_share: { type: 'boolean', description: 'Whether the purchase was family shared' },
    country_code: { type: 'string', description: 'ISO country code of the subscriber' },
    currency: { type: 'string', description: 'ISO 4217 currency code' },
    price: { type: 'number', description: 'Price in USD' },
    price_in_purchased_currency: {
      type: 'number',
      description: 'Price in the currency the purchase was made in',
    },
    store: { type: 'string', description: 'Store the purchase was made on (e.g., APP_STORE)' },
    takehome_percentage: {
      type: 'number',
      description: 'Estimated percentage of the price taken home after store commission',
    },
    tax_percentage: { type: 'number', description: 'Estimated percentage taken as tax' },
    commission_percentage: {
      type: 'number',
      description: 'Estimated percentage taken by the store as commission',
    },
    offer_code: { type: 'string', description: 'Offer code applied to the purchase, if any' },
    subscriber_attributes: {
      type: 'json',
      description: 'Subscriber attributes at the time of the event',
    },
    experiments: { type: 'json', description: 'Experiments the subscriber was enrolled in' },
    cancel_reason: {
      type: 'string',
      description: 'Reason for cancellation (CANCELLATION events only)',
    },
    expiration_reason: {
      type: 'string',
      description: 'Reason for expiration (EXPIRATION events only)',
    },
    api_version: { type: 'string', description: 'RevenueCat webhook API version' },
    event: { type: 'json', description: 'Full RevenueCat event object' },
  }
}

/**
 * Check whether an incoming RevenueCat event matches the configured trigger.
 * Returns true for unknown trigger IDs so unexpected configs fall through rather than drop.
 */
export function isRevenueCatEventMatch(triggerId: string, body: Record<string, unknown>): boolean {
  const expectedType = REVENUECAT_TRIGGER_TO_EVENT_TYPE[triggerId]
  if (!expectedType) {
    return true
  }
  const event = body.event as Record<string, unknown> | undefined
  const actualType = event?.type as string | undefined
  return actualType === expectedType
}