atrade/src/main/kotlin/ui/PeriodTrendCard.kt

// src/main/kotlin/ui/PeriodTrendCard.kt (신규/통합)
package ui

import androidx.compose.foundation.Canvas
import androidx.compose.foundation.layout.*
import androidx.compose.material.*
import androidx.compose.runtime.Composable
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.geometry.Offset
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import model.CandleData

@Composable
fun PeriodTrendCard(label: String, data: List<CandleData>, modifier: Modifier = Modifier) {
    val avgPrice = if (data.isEmpty()) "0"
    else String.format("%,d", data.map { it.stck_prpr.toDoubleOrNull() ?: 0.0 }.average().toLong())

    Card(modifier = modifier.height(80.dp), elevation = 2.dp, backgroundColor = Color.White) {
        Row(modifier = Modifier.padding(8.dp), verticalAlignment = Alignment.CenterVertically) {
            // [좌측] 라벨 및 평균가
            Column(modifier = Modifier.weight(0.4f)) {
                Text(label, fontSize = 10.sp, color = Color.Gray)
                Text(text = "${avgPrice}원", fontSize = 12.sp, fontWeight = FontWeight.Bold)
            }

            // [우측] 간소화된 그래프 (Sparkline)
            Box(modifier = Modifier.weight(0.6f).fillMaxHeight()) {
                if (data.isNotEmpty()) {
                    Canvas(modifier = Modifier.fillMaxSize()) {
                        val prices = data.map { it.stck_prpr.toDoubleOrNull() ?: 0.0 }
                        val max = prices.maxOrNull() ?: 1.0
                        val min = prices.minOrNull() ?: 0.0
                        val range = if (max == min) 1.0 else max - min

                        val stepX = size.width / (prices.size - 1).coerceAtLeast(1)
                        val points = prices.mapIndexed { i, p ->
                            Offset(i * stepX, (size.height - ((p - min) / range * size.height)).toFloat())
                        }

                        for (i in 0 until points.size - 1) {
                            drawLine(
                                color = if (prices.last() >= prices.first()) Color(0xFFE03E2D) else Color(0xFF0E62CF),
                                start = points[i],
                                end = points[i + 1],
                                strokeWidth = 2f
                            )
                        }
                    }
                }
            }
        }
    }
}