package com.socialapp.data.api

import com.auth0.jwt.JWT
import com.auth0.jwt.algorithms.Algorithm
import okhttp3.Interceptor
import okhttp3.Response
import java.util.Date

class JwtInterceptor(private val tokenProvider: () -> String?) : Interceptor {
    override fun intercept(chain: Interceptor.Chain): Response {
        val originalRequest = chain.request()
        val token = tokenProvider()
        
        val newRequest = if (token != null) {
            originalRequest.newBuilder()
                .header("Authorization", "Bearer $token")
                .header("Content-Type", "application/json")
                .build()
        } else {
            originalRequest
        }
        
        return chain.proceed(newRequest)
    }
}

object JwtTokenManager {
    private var token: String? = null
    
    fun saveToken(newToken: String) {
        token = newToken
    }
    
    fun getToken(): String? = token
    
    fun isTokenValid(): Boolean {
        return token != null && !isTokenExpired(token!!)
    }
    
    private fun isTokenExpired(token: String): Boolean {
        return try {
            val decodedJWT = JWT.decode(token)
            val expiresAt = decodedJWT.expiresAt
            expiresAt != null && expiresAt.before(Date())
        } catch (e: Exception) {
            true
        }
    }
    
    fun clearToken() {
        token = null
    }
}