import * as React from "react";
import * as RechartsPrimitive from "recharts";
import { cn } from "@/lib/utils";
// Format: { THEME_NAME: CSS_SELECTOR }
const THEMES = { light: "", dark: ".dark" } as const;
export type ChartConfig = {
[k in string]: {
label?: React.ReactNode;
icon?: React.ComponentType;
} & ({ color?: string; theme?: never } | { color?: never; theme: Record<keyof typeof THEMES, string> });
};
type ChartContextProps = {
config: ChartConfig;
};
const ChartContext = React.createContext<ChartContextProps | null>(null);
function useChart() {
const context = React.useContext(ChartContext);
if (!context) {
throw new Error("useChart must be used within a <ChartContainer />");
}
return context;
}
const ChartContainer = React.forwardRef<
HTMLDivElement,
React.ComponentProps<"div"> & {
config: ChartConfig;
children: React.ComponentProps<typeof RechartsPrimitive.ResponsiveContainer>["children"];
}
>(({ id, className, children, config, ...props }, ref) => {
const uniqueId = React.useId();
const chartId = `chart-${id || uniqueId.replace(/:/g, "")}`;
return (
<ChartContext.Provider value={{ config }}>
<div
data-chart={chartId}
ref={ref}
className={cn(
"flex aspect-video justify-center text-xs [&_.recharts-cartesian-axis-tick_text]:fill-muted-foreground [&_.recharts-cartesian-grid_line[stroke='#ccc']]:stroke-border/50 [&_.recharts-curve.recharts-tooltip-cursor]:stroke-border [&_.recharts-dot[stroke='#fff']]:stroke-transparent [&_.recharts-layer]:outline-none [&_.recharts-polar-grid_[stroke='#ccc']]:stroke-border [&_.recharts-radial-bar-background-sector]:fill-muted [&_.recharts-rectangle.recharts-tooltip-cursor]:fill-muted [&_.recharts-reference-line_[stroke='#ccc']]:stroke-border [&_.recharts-sector[stroke='#fff']]:stroke-transparent [&_.recharts-sector]:outline-none [&_.recharts-surface]:outline-none",
className,
)}
{...props}
>
<ChartStyle id={chartId} config={config} />
<RechartsPrimitive.ResponsiveContainer>{children}</RechartsPrimitive.ResponsiveContainer>
</div>
</ChartContext.Provider>
);
});
ChartContainer.displayName = "Chart";
const ChartStyle = ({ id, config }: { id: string; config: ChartConfig }) => {
const colorConfig = Object.entries(config).filter(([_, config]) => config.theme || config.color);
if (!colorConfig.length) {
return null;
}
return (
<style
dangerouslySetInnerHTML={{
__html: Object.entries(THEMES)
.map(
([theme, prefix]) => `
${prefix} [data-chart=${id}] {
${colorConfig
.map(([key, itemConfig]) => {
const color = itemConfig.theme?.[theme as keyof typeof itemConfig.theme] || itemConfig.color;
return color ? ` --color-${key}: ${color};` : null;
})
.join("\n")}
}
`,
)
.join("\n"),
}}
/>
);
};
const ChartTooltip = RechartsPrimitive.Tooltip;
const ChartTooltipContent = React.forwardRef<
HTMLDivElement,
React.ComponentProps<typeof RechartsPrimitive.Tooltip> &
React.ComponentProps<"div"> & {
hideLabel?: boolean;
hideIndicator?: boolean;
indicator?: "line" | "dot" | "dashed";
nameKey?: string;
labelKey?: string;
}
>(
(
{
active,
payload,
className,
indicator = "dot",
hideLabel = false,
hideIndicator = false,
label,
labelFormatter,
labelClassName,
formatter,
color,
nameKey,
labelKey,
},
ref,
) => {
const { config } = useChart();
const tooltipLabel = React.useMemo(() => {
if (hideLabel || !payload?.length) {
return null;
}
const [item] = payload;
const key = `${labelKey || item.dataKey || item.name || "value"}`;
const itemConfig = getPayloadConfigFromPayload(config, item, key);
const value =
!labelKey && typeof label === "string"
? config[label as keyof typeof config]?.label || label
: itemConfig?.label;
if (labelFormatter) {
return <div className={cn("font-medium", labelClassName)}>{labelFormatter(value, payload)}</div>;
}
if (!value) {
return null;
}
return <div className={cn("font-medium", labelClassName)}>{value}</div>;
}, [label, labelFormatter, payload, hideLabel, labelClassName, config, labelKey]);
if (!active || !payload?.length) {
return null;
}
const nestLabel = payload.length === 1 && indicator !== "dot";
return (
<div
ref={ref}
className={cn(
"grid min-w-[8rem] items-start gap-1.5 rounded-lg border border-border/50 bg-background px-2.5 py-1.5 text-xs shadow-xl",
className,
)}
>
{!nestLabel ? tooltipLabel : null}
<div className="grid gap-1.5">
{payload.map((item, index) => {
const key = `${nameKey || item.name || item.dataKey || "value"}`;
const itemConfig = getPayloadConfigFromPayload(config, item, key);
const indicatorColor = color || item.payload.fill || item.color;
return (
<div
key={item.dataKey}
className={cn(
"flex w-full flex-wrap items-stretch gap-2 [&>svg]:h-2.5 [&>svg]:w-2.5 [&>svg]:text-muted-foreground",
indicator === "dot" && "items-center",
)}
>
{formatter && item?.value !== undefined && item.name ? (
formatter(item.value, item.name, item, index, item.payload)
) : (
<>
{itemConfig?.icon ? (
<itemConfig.icon />
) : (
!hideIndicator && (
<div
className={cn("shrink-0 rounded-[2px] border-[--color-border] bg-[--color-bg]", {
"h-2.5 w-2.5": indicator === "dot",
"w-1": indicator === "line",
"w-0 border-[1.5px] border-dashed bg-transparent": indicator === "dashed",
"my-0.5": nestLabel && indicator === "dashed",
})}
style={
{
"--color-bg": indicatorColor,
"--color-border": indicatorColor,
} as React.CSSProperties
}
/>
)
)}
<div
className={cn(
"flex flex-1 justify-between leading-none",
nestLabel ? "items-end" : "items-center",
)}
>
<div className="grid gap-1.5">
{nestLabel ? tooltipLabel : null}
<span className="text-muted-foreground">{itemConfig?.label || item.name}</span>
</div>
{item.value && (
<span className="font-mono font-medium tabular-nums text-foreground">
{item.value.toLocaleString()}
</span>
)}
</div>
</>
)}
</div>
);
})}
</div>
</div>
);
},
);
ChartTooltipContent.displayName = "ChartTooltip";
const ChartLegend = RechartsPrimitive.Legend;
const ChartLegendContent = React.forwardRef<
HTMLDivElement,
React.ComponentProps<"div"> &
Pick<RechartsPrimitive.LegendProps, "payload" | "verticalAlign"> & {
hideIcon?: boolean;
nameKey?: string;
}
>(({ className, hideIcon = false, payload, verticalAlign = "bottom", nameKey }, ref) => {
const { config } = useChart();
if (!payload?.length) {
return null;
}
return (
<div
ref={ref}
className={cn("flex items-center justify-center gap-4", verticalAlign === "top" ? "pb-3" : "pt-3", className)}
>
{payload.map((item) => {
const key = `${nameKey || item.dataKey || "value"}`;
const itemConfig = getPayloadConfigFromPayload(config, item, key);
return (
<div
key={item.value}
className={cn("flex items-center gap-1.5 [&>svg]:h-3 [&>svg]:w-3 [&>svg]:text-muted-foreground")}
>
{itemConfig?.icon && !hideIcon ? (
<itemConfig.icon />
) : (
<div
className="h-2 w-2 shrink-0 rounded-[2px]"
style={{
backgroundColor: item.color,
}}
/>
)}
{itemConfig?.label}
</div>
);
})}
</div>
);
});
ChartLegendContent.displayName = "ChartLegend";
// Helper to extract item config from a payload.
function getPayloadConfigFromPayload(config: ChartConfig, payload: unknown, key: string) {
if (typeof payload !== "object" || payload === null) {
return undefined;
}
const payloadPayload =
"payload" in payload && typeof payload.payload === "object" && payload.payload !== null
? payload.payload
: undefined;
let configLabelKey: string = key;
if (key in payload && typeof payload[key as keyof typeof payload] === "string") {
configLabelKey = payload[key as keyof typeof payload] as string;
} else if (
payloadPayload &&
key in payloadPayload &&
typeof payloadPayload[key as keyof typeof payloadPayload] === "string"
) {
configLabelKey = payloadPayload[key as keyof typeof payloadPayload] as string;
}
return configLabelKey in config ? config[configLabelKey] : config[key as keyof typeof config];
}
export { ChartContainer, ChartTooltip, ChartTooltipContent, ChartLegend, ChartLegendContent, ChartStyle };