package com.bitcointxoko.gudariwallet.api

import okhttp3.MediaType.Companion.toMediaType
import okhttp3.OkHttpClient
import retrofit2.Retrofit
import retrofit2.converter.kotlinx.serialization.asConverterFactory
import java.util.concurrent.TimeUnit

/**
 * Resolves a Lightning node pubkey to a human-readable alias.
 * Tries mempool.space first, falls back to 1ml.com.
 * Returns null if neither source has the node or both fail.
 */
class NodeAliasClient {

    private val client = OkHttpClient.Builder()
        .connectTimeout(5, TimeUnit.SECONDS)
        .readTimeout(5, TimeUnit.SECONDS)
        .build()

    private val converter = JsonProvider.json
        .asConverterFactory("application/json; charset=UTF-8".toMediaType())

    private val mempoolApi: MempoolApi = Retrofit.Builder()
        .baseUrl("https://mempool.space/")
        .client(client)
        .addConverterFactory(converter)
        .build()
        .create(MempoolApi::class.java)

    private val oneMlApi: OneMlApi = Retrofit.Builder()
        .baseUrl("https://1ml.com/")
        .client(client)
        .addConverterFactory(converter)
        .build()
        .create(OneMlApi::class.java)

    suspend fun resolveAlias(pubkey: String): String? {
        if (pubkey.isBlank()) return null

        // 1. Try mempool.space
        runCatching { mempoolApi.getNode(pubkey) }
            .onSuccess { response ->
                val alias = response.alias?.takeIf { it.isNotBlank() }
                if (alias != null) return alias
            }

        // 2. Fall back to 1ml.com
        runCatching { oneMlApi.getNode(pubkey) }
            .onSuccess { response ->
                val alias = response.alias?.takeIf { it.isNotBlank() }
                if (alias != null) return alias
            }

        return null
    }
}