chartAreaLinear#

// shadcn/ui "chart-area" (linear recipe) — clean-room reimplementation.
//
// Structurally identical to the default recipe, but with straight
// (unsmoothed) segments connecting each data point instead of a smoothed
// curve, giving a more angular silhouette.
//
// Implemented purely from the block's public functional/visual spec — no
// upstream shadcn/ui source was viewed or copied.

import type { ChartOption } from "@domphy/chart";
import type { DomphyElement } from "@domphy/core";
import type { ThemeColor } from "@domphy/theme";
import {
  CHART_AREA_MONTHLY_DATA,
  CHART_AREA_X_AXIS_BARE,
  CHART_AREA_Y_AXIS_HIDDEN,
  type ChartAreaSinglePoint,
  type ChartTrendDirection,
  chartAreaFrame,
  chartAreaGradientFill,
  chartAreaSeriesColor,
  chartAxisTooltipFormatter,
  chartCardShell,
  chartTrendFooter,
} from "./chart-area-shared.js";

export interface ChartAreaLinearProps {
  data?: ChartAreaSinglePoint[];
  seriesLabel?: string;
  seriesColor?: ThemeColor;
  title?: string;
  description?: string;
  trendText?: string;
  trendDirection?: ChartTrendDirection;
  captionText?: string;
  height?: number;
}

/**
 * shadcn/ui "chart-area" linear recipe — a single-series area chart with
 * straight point-to-point segments. Call with no arguments for a working
 * demo.
 */
function chartAreaLinear(
  props: ChartAreaLinearProps = {},
): DomphyElement<"div"> {
  const {
    data = CHART_AREA_MONTHLY_DATA,
    seriesLabel = "Visitors",
    seriesColor = "primary",
    title = "Area Chart - Linear",
    description = "Showing total visitors for the last 6 months",
    trendText = "Trending up by 5.2% this month",
    trendDirection = "up",
    captionText = `${data[0]?.month ?? ""} - ${data[data.length - 1]?.month ?? ""} 2026`,
    height = 64,
  } = props;

  const categories = data.map((point) => point.month);
  const ramp = chartAreaSeriesColor(0);

  const option: ChartOption = {
    tooltip: {
      trigger: "axis",
      axisPointer: { type: "none" },
      // Upstream: `<ChartTooltipContent indicator="dot" hideLabel />` with no
      // value formatter — bare number, no " visitors" unit.
      formatter: chartAxisTooltipFormatter(categories, undefined, true),
    },
    xAxis: { ...CHART_AREA_X_AXIS_BARE, data: categories },
    yAxis: CHART_AREA_Y_AXIS_HIDDEN,
    grid: { left: 8, right: 8, top: 12, bottom: 32, containLabel: false },
    series: [
      {
        type: "line",
        name: seriesLabel,
        smooth: false,
        showSymbol: false,
        color: seriesColor,
        lineStyle: { width: 2, opacity: ramp.strokeOpacity },
        areaStyle: {
          color: chartAreaGradientFill("primary", 0.4, 0.4, ramp.tone),
          opacity: 1,
        },
        data: data.map((point) => point.value),
      },
    ],
  };

  return chartCardShell({
    title,
    description,
    content: { div: [chartAreaFrame(option, height)] },
    footer: chartTrendFooter({
      trendText,
      direction: trendDirection,
      captionText,
    }),
  });
}

export { chartAreaLinear };