import type { DashboardChartTimeframe } from "@/features/trade/types/trade.types";
import type { ChartBar } from "./chart-utils";

export const UP_COLOR = "#ef4444";
export const MINUTE_SYNC_INTERVAL_MS = 30000;
export const REALTIME_STALE_THRESHOLD_MS = 12000;
export const CHART_MIN_HEIGHT = 220;

export interface ChartPalette {
  backgroundColor: string;
  downColor: string;
  volumeDownColor: string;
  textColor: string;
  borderColor: string;
  gridColor: string;
  crosshairColor: string;
}

export const DEFAULT_CHART_PALETTE: ChartPalette = {
  backgroundColor: "#ffffff",
  downColor: "#2563eb",
  volumeDownColor: "rgba(37, 99, 235, 0.45)",
  textColor: "#6d28d9",
  borderColor: "#e9d5ff",
  gridColor: "#f3e8ff",
  crosshairColor: "#c084fc",
};

export const MINUTE_TIMEFRAMES: Array<{
  value: DashboardChartTimeframe;
  label: string;
}> = [
  { value: "1m", label: "1분" },
  { value: "30m", label: "30분" },
  { value: "1h", label: "1시간" },
];

export const PERIOD_TIMEFRAMES: Array<{
  value: DashboardChartTimeframe;
  label: string;
}> = [
  { value: "1d", label: "일" },
  { value: "1w", label: "주" },
];

/**
 * @description 브랜드 CSS 변수에서 차트 팔레트를 읽어옵니다.
 * @see features/trade/components/chart/StockLineChart.tsx 차트 생성/테마 반영
 */
export function getChartPaletteFromCssVars(
  themeMode: "light" | "dark",
): ChartPalette {
  const isDark = themeMode === "dark";
  const backgroundVar = isDark
    ? "--brand-chart-background-dark"
    : "--brand-chart-background-light";
  const textVar = isDark
    ? "--brand-chart-text-dark"
    : "--brand-chart-text-light";
  const borderVar = isDark
    ? "--brand-chart-border-dark"
    : "--brand-chart-border-light";
  const gridVar = isDark
    ? "--brand-chart-grid-dark"
    : "--brand-chart-grid-light";
  const crosshairVar = isDark
    ? "--brand-chart-crosshair-dark"
    : "--brand-chart-crosshair-light";

  return {
    backgroundColor: readCssVar(
      backgroundVar,
      DEFAULT_CHART_PALETTE.backgroundColor,
    ),
    downColor: readCssVar(
      "--brand-chart-down",
      DEFAULT_CHART_PALETTE.downColor,
    ),
    volumeDownColor: readCssVar(
      "--brand-chart-volume-down",
      DEFAULT_CHART_PALETTE.volumeDownColor,
    ),
    textColor: readCssVar(textVar, DEFAULT_CHART_PALETTE.textColor),
    borderColor: readCssVar(borderVar, DEFAULT_CHART_PALETTE.borderColor),
    gridColor: readCssVar(gridVar, DEFAULT_CHART_PALETTE.gridColor),
    crosshairColor: readCssVar(
      crosshairVar,
      DEFAULT_CHART_PALETTE.crosshairColor,
    ),
  };
}

/**
 * @description 차트 데이터 배열이 동일한지 비교합니다.
 * @see features/trade/components/chart/StockLineChart.tsx 분봉 동기화 시 불필요한 상태 업데이트 방지
 */
export function areBarsEqual(left: ChartBar[], right: ChartBar[]) {
  if (left.length !== right.length) return false;

  for (let index = 0; index < left.length; index += 1) {
    const lhs = left[index];
    const rhs = right[index];
    if (!lhs || !rhs) return false;
    if (
      lhs.time !== rhs.time ||
      lhs.open !== rhs.open ||
      lhs.high !== rhs.high ||
      lhs.low !== rhs.low ||
      lhs.close !== rhs.close ||
      lhs.volume !== rhs.volume
    ) {
      return false;
    }
  }

  return true;
}

function readCssVar(name: string, fallback: string) {
  if (typeof window === "undefined") return fallback;
  const value = window
    .getComputedStyle(document.documentElement)
    .getPropertyValue(name)
    .trim();
  return value || fallback;
}