import type { ChartColors } from "./types";
import { blendHex } from "../../../theme/color-utils";

interface ChartPaletteInput {
  bg: string;
  border: string;
  borderFocused: string;
  text: string;
  textDim: string;
  positive: string;
  negative: string;
}

export interface ResolvedChartPalette extends ChartColors {
  candleUp: string;
  candleDown: string;
  wickUp: string;
  wickDown: string;
}

export function resolveChartPalette(
  baseColors: ChartPaletteInput,
  trend: "positive" | "negative" | "neutral" = "positive",
): ResolvedChartPalette {
  const lineColor = trend === "negative"
    ? baseColors.negative
    : trend === "neutral"
      ? baseColors.text
      : baseColors.positive;

  return {
    lineColor,
    fillColor: blendHex(baseColors.bg, lineColor, 0.22),
    volumeUp: blendHex(baseColors.bg, baseColors.positive, 0.35),
    volumeDown: blendHex(baseColors.bg, baseColors.negative, 0.35),
    gridColor: blendHex(baseColors.bg, baseColors.border, 0.55),
    crosshairColor: baseColors.borderFocused,
    bgColor: baseColors.bg,
    axisColor: baseColors.textDim,
    activeRangeColor: baseColors.text,
    inactiveRangeColor: blendHex(baseColors.bg, baseColors.textDim, 0.75),
    preMarketBgColor: blendHex(baseColors.bg, "#8a641f", 0.28),
    postMarketBgColor: blendHex(baseColors.bg, "#7a4624", 0.28),
    candleUp: baseColors.positive,
    candleDown: baseColors.negative,
    wickUp: blendHex(baseColors.positive, baseColors.text, 0.35),
    wickDown: blendHex(baseColors.negative, baseColors.text, 0.35),
  };
}