package com.peachpasswords.sync

import android.content.Context
import dagger.hilt.android.qualifiers.ApplicationContext
import javax.inject.Inject
import javax.inject.Singleton
import kotlinx.coroutines.flow.MutableStateFlow
import kotlinx.coroutines.flow.StateFlow
import kotlinx.coroutines.flow.asStateFlow

@Singleton
class BackgroundSyncPreference @Inject constructor(
    @ApplicationContext context: Context,
) {
    private val prefs = context.getSharedPreferences(PREFS_FILE, Context.MODE_PRIVATE)
    private val _enabled = MutableStateFlow(readEnabled(prefs.contains(KEY_ENABLED)) {
        prefs.getBoolean(KEY_ENABLED, true)
    })
    val enabled: StateFlow<Boolean> = _enabled.asStateFlow()

    fun setEnabled(enabled: Boolean) {
        prefs.edit().putBoolean(KEY_ENABLED, enabled).apply()
        _enabled.value = enabled
    }

    fun reset() {
        prefs.edit().clear().apply()
        _enabled.value = true
    }

    companion object {
        private const val PREFS_FILE = "peach_background_sync"
        private const val KEY_ENABLED = "enabled"

        internal fun isEnabled(context: Context): Boolean {
            val prefs = context.getSharedPreferences(PREFS_FILE, Context.MODE_PRIVATE)
            return readEnabled(prefs.contains(KEY_ENABLED)) {
                prefs.getBoolean(KEY_ENABLED, true)
            }
        }
    }
}

// Existing paired installs default on so upgrading fixes the unreachable-phone state.
internal fun readEnabled(hasStoredChoice: Boolean, storedValue: () -> Boolean): Boolean =
    if (hasStoredChoice) storedValue() else true