// apps/mobile/lib/push.ts
// Expo Push token 등록 — 앱 진입 시 호출하면 Supabase push_tokens 테이블에 upsert.

import * as Notifications from 'expo-notifications'
import * as Device from 'expo-device'
import { Platform } from 'react-native'
import Constants from 'expo-constants'
import { supabase } from './supabase'

Notifications.setNotificationHandler({
  handleNotification: async () => ({
    shouldShowAlert: true,
    shouldPlaySound: true,
    shouldSetBadge: false,
    shouldShowBanner: true,
    shouldShowList: true
  })
})

/**
 * Expo push token을 받아 Supabase push_tokens 테이블에 upsert.
 * 시뮬레이터/에뮬레이터에서는 token이 발급되지 않으므로 조용히 return.
 */
export async function registerPushToken(userId: string): Promise<void> {
  if (!Device.isDevice) {
    return
  }

  try {
    // 권한 요청
    const { status: existingStatus } = await Notifications.getPermissionsAsync()
    let finalStatus = existingStatus
    if (existingStatus !== 'granted') {
      const { status } = await Notifications.requestPermissionsAsync()
      finalStatus = status
    }
    if (finalStatus !== 'granted') {
      return
    }

    // EAS projectId는 app.json/eas.json에서
    const projectId =
      (Constants.expoConfig?.extra?.eas?.projectId as string | undefined) ??
      (Constants.easConfig?.projectId as string | undefined)

    const tokenData = await Notifications.getExpoPushTokenAsync(projectId ? { projectId } : undefined)
    const token = tokenData.data

    if (!token) return

    const platform: 'ios' | 'android' | 'web' =
      Platform.OS === 'ios' ? 'ios' : Platform.OS === 'android' ? 'android' : 'web'

    // Android 채널 설정
    if (Platform.OS === 'android') {
      await Notifications.setNotificationChannelAsync('default', {
        name: 'default',
        importance: Notifications.AndroidImportance.MAX,
        vibrationPattern: [0, 250, 250, 250],
        lightColor: '#f25b29'
      })
    }

    // Supabase upsert
    await supabase.from('push_tokens').upsert(
      {
        user_id: userId,
        token,
        platform,
        device_name: Device.deviceName ?? null
      },
      { onConflict: 'token' }
    )
  } catch {
    // push 등록 실패는 앱 진행 차단하지 않음
  }
}