package com.hotdeal.alarm

import android.app.Application
import android.util.Log
import androidx.hilt.work.HiltWorkerFactory
import androidx.work.Configuration
import com.hotdeal.alarm.data.local.preferences.AppSettings
import com.hotdeal.alarm.worker.WorkerScheduler
import dagger.hilt.android.HiltAndroidApp
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.SupervisorJob
import kotlinx.coroutines.flow.first
import kotlinx.coroutines.launch
import javax.inject.Inject

@HiltAndroidApp
class HotDealApplication : Application(), Configuration.Provider {

    @Inject
    lateinit var workerFactory: HiltWorkerFactory

    @Inject
    lateinit var workerScheduler: WorkerScheduler

    @Inject
    lateinit var appSettings: AppSettings

    private val applicationScope = CoroutineScope(SupervisorJob() + Dispatchers.Main)

    override val workManagerConfiguration: Configuration
        get() = Configuration.Builder()
            .setWorkerFactory(workerFactory)
            .setMinimumLoggingLevel(Log.DEBUG)
            .build()

    override fun onCreate() {
        super.onCreate()
        // 앱 시작 시 백그라운드 폴링 즉시 등록/갱신
        ensurePollingScheduled()
    }

    /**
     * 앱이 시작될 때마다 백그라운드 폴링이 등록되어 있는지 확인하고,
     * 없으면 즉시 등록합니다. UPDATE 정책으로 항상 최신 Worker가 동작합니다.
     */
    private fun ensurePollingScheduled() {
        applicationScope.launch {
            try {
                val interval = appSettings.pollingInterval.first()
                Log.d("HotDealApp", "백그라운드 폴링 등록/갱신: ${interval}분 간격")
                workerScheduler.schedulePeriodicPolling(interval.toLong())
            } catch (e: Exception) {
                Log.e("HotDealApp", "폴링 스케줄 등록 실패: ${e.message}", e)
                // 기본값으로 폴백
                workerScheduler.schedulePeriodicPolling(WorkerScheduler.DEFAULT_INTERVAL_MINUTES)
            }
        }
    }
}