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import {
ComposedChart as ReComposedChart,
XAxis,
YAxis,
CartesianGrid,
Bar,
Line,
DotProps,
ReferenceLine,
Layer,
type BarProps,
} from 'recharts';
// Components
import CustomTooltip from './CustomTooltip';
import CustomXAxisTick from './CustomXAxisTick';
import CustomYAxisTick from './CustomYAxisTick';
import CustomShapeBar, { CustomShapeBarProps } from './CustomShapeBar';
import CustomDot from './CustomDot';
// Constants
import { CHART_FIELDS } from '@/constants/chart';
// Types
import { BarPosition, ChartMode, ChartRow } from '@/types/chart';
// Utils
import { isTruthy } from '@/utils/validation';
type OnMouseMove = NonNullable<
React.ComponentProps<typeof ReComposedChart>['onMouseMove']
>;
type ExtractFn<T> = T extends (...args: unknown[]) => unknown ? T : never;
type ShapeFn = ExtractFn<NonNullable<BarProps['shape']>>;
type ShapeProps = Parameters<ShapeFn>[0];
interface ComposedChartProps {
data: ChartRow[];
colorsByKey?: Record<string, string>;
spacing: number;
roundedMax: number;
ticks: number[];
width?: number;
height?: number;
barSize?: number;
gridColor?: string;
activeIndex?: number | null;
containerRef?: React.RefObject<HTMLDivElement | null>;
mode?: ChartMode;
onActiveIndexChange?: (i: number | null) => void;
}
const ComposedChart = ({
data,
colorsByKey,
spacing,
roundedMax,
ticks,
width = 300,
height = 210,
barSize = 12,
gridColor = 'hsl(var(--primary-550))',
activeIndex = null,
containerRef,
mode = ChartMode.Week,
onActiveIndexChange,
}: ComposedChartProps) => {
const dotRef = useRef<Record<number, { cx: number; cy: number }>>({});
const [overlayX, setOverlayX] = useState<number | null>(null);
const [hoverIndex, setHoverIndex] = useState<number | null>(null);
useEffect(() => {
// Hide tooltip when user scrolls anywhere on the page
const handleScroll = () => {
onActiveIndexChange?.(null);
};
// Hide tooltip when user clicks outside of the chart container
const handleClick = (e: MouseEvent) => {
if (!containerRef?.current?.contains(e.target as Node)) {
onActiveIndexChange?.(null);
}
};
// Listen to scroll and click events
window.addEventListener('scroll', handleScroll, true);
document.addEventListener('click', handleClick);
return () => {
// Clean up listeners on unmount
window.removeEventListener('scroll', handleScroll, true);
document.removeEventListener('click', handleClick);
};
}, [onActiveIndexChange, containerRef]);
const setActiveIndex = useCallback(
(next: number | null) => {
if (next !== activeIndex) {
onActiveIndexChange?.(next);
}
},
[activeIndex],
);
const handleMouseMove: OnMouseMove = useCallback(
(state) => {
if (state?.isTooltipActive && isTruthy(state.activeTooltipIndex)) {
const idx = Number(state.activeTooltipIndex);
const x = state.activeCoordinate?.x ?? 0;
setOverlayX((prev) => (prev !== x ? x : prev));
setHoverIndex((prev) => (prev !== idx ? idx : prev));
} else {
if (isTruthy(overlayX || hoverIndex)) {
setOverlayX(null);
setHoverIndex(null);
setActiveIndex?.(null);
}
}
},
[overlayX, hoverIndex, setActiveIndex],
);
const handleMouseLeave = useCallback(() => {
setActiveIndex?.(null);
}, [setActiveIndex]);
const handleMouseEnter = useCallback(() => {
setActiveIndex?.(hoverIndex);
}, [hoverIndex, setActiveIndex]);
const widthYAxis = Math.max(...ticks).toString().length * 10;
const hasDataRow = useMemo(
() =>
isTruthy(hoverIndex) &&
(Number(data[hoverIndex]?.lunchRegistrations) > 0 ||
Number(data[hoverIndex]?.likes) > 0 ||
Number(data[hoverIndex]?.dislikes) > 0),
[hoverIndex, data],
);
return (
<ReComposedChart
key={`${mode}-${data[0]?.title}`}
data={data}
width={width}
height={height}
margin={{ top: 16, right: 0, left: 0, bottom: 0 }}
onMouseMove={handleMouseMove}
onMouseLeave={handleMouseLeave}
>
<CartesianGrid
strokeDasharray="3 3"
stroke={gridColor}
strokeWidth={0.5}
vertical={false}
/>
<XAxis
dataKey={CHART_FIELDS.label.key}
tickLine={false}
axisLine={false}
interval={0}
scale="point"
padding={{ left: spacing, right: spacing }}
tick={(props) => (
<CustomXAxisTick {...props} activeIndex={activeIndex} data={data} />
)}
/>
<YAxis
axisLine={false}
tickLine={false}
domain={[0, roundedMax]}
ticks={ticks}
width={widthYAxis}
tick={CustomYAxisTick}
/>
<CustomTooltip
colorsByKey={colorsByKey}
containerRef={containerRef}
activeIndex={activeIndex}
dotRef={dotRef}
/>
<ReferenceLine
y={0}
stroke={CHART_FIELDS.likes.color}
strokeWidth={0.8}
/>
{/* Bar stack: Likes + Dislikes */}
<Bar
dataKey={CHART_FIELDS.likes.key}
name={CHART_FIELDS.likes.name}
stackId="reactions"
fill={CHART_FIELDS.likes.color}
shape={(props: ShapeProps) => (
<CustomShapeBar
{...(props as CustomShapeBarProps)}
position={BarPosition.BOTTOM}
siblingKey={CHART_FIELDS.dislikes.key}
barSize={barSize}
dotCx={dotRef?.current[(props as CustomShapeBarProps).index!]?.cx}
/>
)}
/>
<Bar
dataKey={CHART_FIELDS.dislikes.key}
name={CHART_FIELDS.dislikes.name}
stackId="reactions"
fill={CHART_FIELDS.dislikes.color}
shape={(props: ShapeProps) => (
<CustomShapeBar
{...(props as CustomShapeBarProps)}
position={BarPosition.TOP}
siblingKey={CHART_FIELDS.likes.key}
barSize={barSize}
dotCx={dotRef?.current[(props as CustomShapeBarProps).index!]?.cx}
/>
)}
/>
{/* Line = lunchRegistrations */}
<Line
type="linear"
dataKey={CHART_FIELDS.lunchRegistrations.key}
name={CHART_FIELDS.lunchRegistrations.name}
stroke={CHART_FIELDS.lunchRegistrations.color}
dot={(props) => {
const { key, ...restProps } = props; // Destructure and remove `key`
return (
<CustomDot
key={props.index}
{...restProps}
dotRef={dotRef}
color={CHART_FIELDS.lunchRegistrations.color}
/>
);
}}
activeDot={(p: DotProps & { index?: number }) => (
<circle
cx={p.cx}
cy={p.cy}
r={activeIndex === p.index ? 4 : 3}
fill={CHART_FIELDS.lunchRegistrations.color}
stroke={CHART_FIELDS.lunchRegistrations.color}
className="cursor-pointer"
/>
)}
isAnimationActive={false}
connectNulls={false}
/>
<Layer>
{isTruthy(overlayX) && hasDataRow && (
<rect
x={overlayX - barSize / 2}
y={0}
width={barSize}
height={height}
fill="none"
pointerEvents="all"
className={hasDataRow ? 'cursor-pointer' : 'cursor-default'}
onMouseEnter={handleMouseEnter}
onMouseLeave={handleMouseLeave}
/>
)}
</Layer>
</ReComposedChart>
);
};
export default ComposedChart;
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