package ui

import androidx.compose.foundation.border
import androidx.compose.foundation.layout.*
import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.material.*
import androidx.compose.runtime.*
import androidx.compose.ui.Alignment
import androidx.compose.ui.DragData
import androidx.compose.ui.ExperimentalComposeUiApi
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.onExternalDrag
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.input.PasswordVisualTransformation
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import io.ktor.client.HttpClient
import io.ktor.client.engine.cio.CIO
import io.ktor.client.plugins.contentnegotiation.ContentNegotiation
import io.ktor.client.plugins.logging.DEFAULT
import io.ktor.client.plugins.logging.LogLevel
import io.ktor.client.plugins.logging.Logger
import io.ktor.client.plugins.logging.Logging
import io.ktor.serialization.kotlinx.json.json
import kotlinx.coroutines.launch
import kotlinx.serialization.json.Json
import model.AppConfig
import model.KisSession
import network.DartCodeManager
import network.KisAuthService
import network.KisTradeService
import org.jetbrains.exposed.sql.deleteAll
import org.jetbrains.exposed.sql.insert
import org.jetbrains.exposed.sql.transactions.transaction


// src/main/kotlin/ui/SettingsScreen.kt
@OptIn(ExperimentalComposeUiApi::class)
@Composable
fun SettingsScreen(onAuthSuccess: () -> Unit) {
    val scope = rememberCoroutineScope()
    var config by remember { mutableStateOf(KisSession.config) }
    var statusMessage by remember { mutableStateOf("정보를 입력하세요.") }

    // 계좌번호 입력 시 데이터 자동 로드 함수
    fun checkAndLoadConfig(accountNo: String, isReal: Boolean) {
        val loaded = DatabaseFactory.findConfigByAccount(accountNo)
        if (loaded != null) {
            config = loaded
            statusMessage = "✅ 기존 데이터를 불러왔습니다."
        }
    }

    LazyColumn(modifier = Modifier.fillMaxSize().padding(24.dp)) {
        item {
            Text("거래 방식 선택", style = MaterialTheme.typography.h6)
            Row(verticalAlignment = Alignment.CenterVertically) {
                RadioButton(selected = !config.isSimulation, onClick = { config = config.copy(isSimulation = false,) })
                Text("실전투자")
                Spacer(Modifier.width(16.dp))
                RadioButton(selected = config.isSimulation, onClick = { config = config.copy() })
                Text("모의투자")
            }
            Divider(Modifier.padding(vertical = 12.dp))
            OutlinedTextField(
                value = config.htsId,
                onValueChange = { config = config.copy(htsId = it,) },
                label = { Text("HTS ID (실시간 체결 통보용)") },
                modifier = Modifier.fillMaxWidth().padding(bottom = 8.dp),
                placeholder = { Text("한국투자증권 HTS 접속 ID를 입력하세요") }
            )
            // 실전 3종 입력
            Text("실전투자 정보 (시세 조회 필수)", fontWeight = FontWeight.Bold)
            OutlinedTextField(value = config.realAccountNo, onValueChange = {
                config = config.copy(realAccountNo = it,)
                if(it.length >= 8) checkAndLoadConfig(it, true)
            }, label = { Text("실전 계좌번호") }, modifier = Modifier.fillMaxWidth())
            OutlinedTextField(value = config.realAppKey, onValueChange = { config = config.copy(realAppKey = it,) }, label = { Text("실전 App Key") }, modifier = Modifier.fillMaxWidth())
            OutlinedTextField(value = config.realSecretKey, onValueChange = { config = config.copy(realSecretKey = it,) }, label = { Text("실전 Secret Key") }, modifier = Modifier.fillMaxWidth(), visualTransformation = PasswordVisualTransformation())

            Spacer(Modifier.height(16.dp))

            // 모의 3종 입력
            Text("모의투자 정보", fontWeight = FontWeight.Bold)
            OutlinedTextField(value = config.vtsAccountNo, onValueChange = {
                config = config.copy(vtsAccountNo = it,)
                if(it.length >= 8) checkAndLoadConfig(it, false)
            }, label = { Text("모의 계좌번호") }, modifier = Modifier.fillMaxWidth())
            OutlinedTextField(value = config.vtsAppKey, onValueChange = { config = config.copy(vtsAppKey = it,) }, label = { Text("모의 App Key") }, modifier = Modifier.fillMaxWidth())
            OutlinedTextField(value = config.vtsSecretKey, onValueChange = { config = config.copy(vtsSecretKey = it,) }, label = { Text("모의 Secret Key") }, modifier = Modifier.fillMaxWidth(), visualTransformation = PasswordVisualTransformation())

            Divider(Modifier.padding(vertical = 16.dp))

            OutlinedTextField(value = config.nAppKey, onValueChange = { config = config.copy(nAppKey = it,) }, label = { Text("NAVER Client ID") }, modifier = Modifier.fillMaxWidth())
            OutlinedTextField(value = config.nSecretKey, onValueChange = { config = config.copy(nSecretKey = it,) }, label = { Text("NAVER Client Secret") }, modifier = Modifier.fillMaxWidth(), visualTransformation = PasswordVisualTransformation())
            OutlinedTextField(value = config.dAppKey, onValueChange = { config = config.copy(dAppKey = it,) }, label = { Text("Dart ApiKey") }, modifier = Modifier.fillMaxWidth())

            // AI 모델 경로 및 드래그 앤 드롭
            Text("AI 모델 설정", fontWeight = FontWeight.Bold)
            Box(
                modifier = Modifier.fillMaxWidth().height(100.dp).border(1.dp, Color.Gray, RoundedCornerShape(8.dp))
                    .onExternalDrag(onDrop = { state ->
                        val data = state.dragData
                        if (data is DragData.FilesList) {
                            val path = data.readFiles().firstOrNull()?.removePrefix("file:")
                            if (path?.endsWith(".gguf") == true) config = config.copy(modelPath = path,)
                        }
                    }),
                contentAlignment = Alignment.Center
            ) {
                Text(if(config.modelPath.isEmpty()) "GGUF 모델 파일을 여기로 드래그하세요" else config.modelPath, fontSize = 12.sp)
            }
            Box(
                modifier = Modifier.fillMaxWidth().height(100.dp).border(1.dp, Color.Gray, RoundedCornerShape(8.dp))
                    .onExternalDrag(onDrop = { state ->
                        val data = state.dragData
                        if (data is DragData.FilesList) {
                            val embedModelPath = data.readFiles().firstOrNull()?.removePrefix("file:")
                            if (embedModelPath?.endsWith(".gguf") == true) config = config.copy(embedModelPath = embedModelPath,)
                        }
                    }),
                contentAlignment = Alignment.Center
            ) {
                Text(if(config.embedModelPath.isEmpty()) "임베드용 GGUF 모델 파일을 여기로 드래그하세요" else config.embedModelPath, fontSize = 12.sp)
            }

            Spacer(Modifier.height(24.dp))

            Button(
                modifier = Modifier.fillMaxWidth().height(50.dp),
                onClick = {
                    scope.launch {
//                        isLoading = true
                        // 1. KisSession.config 업데이트 및 DB 저장
                        KisSession.config = config
                        DatabaseFactory.saveConfig(config)
                        DartCodeManager.updateCorpCodes(HttpClient(CIO) {
                            install(ContentNegotiation) {
                                json(Json {
                                    ignoreUnknownKeys = true
                                    encodeDefaults = true // 기본값이 포함된 요청 바디를 정확히 전송하기 위해 필요
                                })
                            }
                            // [수정] 모든 로그(Headers + Body)를 찍도록 설정
                            install(Logging) {
                                logger = Logger.DEFAULT
                                level = LogLevel.BODY
                            }
                        })
                        val authService = KisAuthService
                        val tradeService = KisTradeService
                        val authSuccess = authService.refreshAllTokens()
                        val wsKeySuccess = tradeService.refreshWebsocketKey()

                        if (authSuccess && wsKeySuccess) {
                            statusMessage = "✅ 인증 성공! LLM 시작 중..."
                            onAuthSuccess()
                        } else {
                            statusMessage = "❌ 인증 실패. 키 정보를 확인하세요."
                        }
//                        isLoading = false
                    }
                }
            ) { Text("설정 저장 및 실행") }
            Text(statusMessage, color = Color.Gray, modifier = Modifier.padding(top = 8.dp))
        }
    }
}