package com.novayaplaneta.data.local

import android.content.Context
import androidx.datastore.core.DataStore
import androidx.datastore.preferences.core.Preferences
import androidx.datastore.preferences.core.edit
import androidx.datastore.preferences.core.stringPreferencesKey
import androidx.datastore.preferences.preferencesDataStore
import dagger.hilt.android.qualifiers.ApplicationContext
import kotlinx.coroutines.flow.Flow
import kotlinx.coroutines.flow.first
import kotlinx.coroutines.flow.map
import javax.inject.Inject
import javax.inject.Singleton

private val Context.dataStore: DataStore<Preferences> by preferencesDataStore(name = "auth_preferences")

@Singleton
class TokenManager @Inject constructor(
    @ApplicationContext private val context: Context
) {
    private val accessTokenKey = stringPreferencesKey("access_token")
    private val refreshTokenKey = stringPreferencesKey("refresh_token")
    
    val accessToken: Flow<String?> = context.dataStore.data.map { preferences ->
        preferences[accessTokenKey]
    }
    
    val refreshToken: Flow<String?> = context.dataStore.data.map { preferences ->
        preferences[refreshTokenKey]
    }
    
    suspend fun getAccessToken(): String? {
        return accessToken.first()
    }
    
    suspend fun getRefreshToken(): String? {
        return refreshToken.first()
    }
    
    suspend fun saveTokens(accessToken: String, refreshToken: String) {
        context.dataStore.edit { preferences ->
            preferences[accessTokenKey] = accessToken
            preferences[refreshTokenKey] = refreshToken
        }
    }
    
    suspend fun clearTokens() {
        context.dataStore.edit { preferences ->
            preferences.remove(accessTokenKey)
            preferences.remove(refreshTokenKey)
        }
    }
    
    suspend fun isAuthenticated(): Boolean {
        return getAccessToken() != null
    }
}