package network

import io.ktor.client.*
import io.ktor.client.call.*
import io.ktor.client.engine.cio.CIO
import io.ktor.client.plugins.contentnegotiation.*
import io.ktor.client.request.*
import io.ktor.client.statement.bodyAsText
import io.ktor.http.*
import io.ktor.serialization.kotlinx.json.*
import kotlinx.serialization.json.Json
import io.ktor.client.plugins.contentnegotiation.*
import io.ktor.client.plugins.logging.*
import model.TokenRequest
import model.TokenResponse

class KisAuthService {
    private val client = HttpClient(CIO) {
        install(ContentNegotiation) {
            json(Json {
                ignoreUnknownKeys = true
                encodeDefaults = true // 기본값(grant_type)이 누락되지 않도록 설정
            })
        }
        // 디버깅을 위해 로그 추가 (인텔 맥 콘솔에서 전송 데이터 확인 가능)
        install(Logging) {
            level = LogLevel.BODY
        }
    }

    private fun getBaseUrl(isSimulation: Boolean): String {
        return if (isSimulation) {
            "https://openapivts.koreainvestment.com:29443" // 'openapi' 추가됨
        } else {
            "https://openapi.koreainvestment.com:9443"
        }
    }

    suspend fun fetchAccessToken(
        appKey: String,
        secretKey: String,
        isSimulation: Boolean
    ): Result<TokenResponse> {
        return try {
            val url = "${getBaseUrl(isSimulation)}/oauth2/tokenP"

            val response = client.post(url) {
                // 헤더 설정 (매우 중요)
                contentType(ContentType.Application.Json)

                // 요청 바디 (TokenRequest 객체 전달)
                setBody(TokenRequest(
                    "client_credentials",
                     appKey,
                     secretKey
                ))
            }

            if (response.status == HttpStatusCode.OK) {
                Result.success(response.body())
            } else {
                val errorBody = response.bodyAsText()
                println("HTTP ${response.status}: $errorBody")
                Result.failure(Exception("HTTP ${response.status}: $errorBody"))
            }
        } catch (e: Exception) {
            Result.failure(e)
        }
    }
}