'use server'

import { auth } from '@/auth'
import { updateAISettings } from './ai-settings'
import { getAISettings } from './ai-settings'
import type { ConsentRecord } from '@/lib/consent/cookie-consent'

/**
 * Get cookie consent from database for authenticated users.
 * Returns null for guests or when no DB preference exists.
 */
export async function getCookieConsentFromDB(): Promise<ConsentRecord | null> {
  const session = await auth()

  if (!session?.user?.id) {
    return null
  }

  try {
    const settings = await getAISettings(session.user.id)
    // Only return consent if user has explicitly set it
    // If anonymousAnalytics is undefined or false, treat as "no preference set"
    if (settings.anonymousAnalytics === true) {
      return {
        version: 1,
        necessary: true,
        analytics: true,
        marketing: false,
        updatedAt: new Date().toISOString(),
      }
    }
    // If explicitly false, return that too
    if (settings.anonymousAnalytics === false) {
      return {
        version: 1,
        necessary: true,
        analytics: false,
        marketing: false,
        updatedAt: new Date().toISOString(),
      }
    }
  } catch (error) {
    console.error('[getCookieConsentFromDB] Failed to load:', error)
  }

  return null
}

/**
 * Save cookie consent and sync to database for authenticated users.
 *
 * For logged-in users, this updates UserAISettings.anonymousAnalytics in the database.
 * For guests, this no-ops silently (they rely on localStorage only).
 *
 * Call this from client components after setting local consent.
 */
export async function saveCookieConsent(consent: ConsentRecord) {
  const session = await auth()

  // Only sync to DB for authenticated users
  if (session?.user?.id) {
    try {
      await updateAISettings({ anonymousAnalytics: consent.analytics })
    } catch (error) {
      console.error('[saveCookieConsent] Failed to sync to DB:', error)
      // Don't throw — local consent is already set, DB sync is best-effort
    }
  }

  return { success: true }
}