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// Stryker disable all - Come back and refactor code to make it more testable and then re-enable mutation testing
export default function CountHistogram({
data,
s,
width = 600,
height = 400,
xLabel = "Value Range",
yLabel = "Count",
testid = "count-histogram",
}) {
if (!data || data.length === 0) {
return (
<div data-testid={`${testid}-empty`}>
<p>No data to display</p>
</div>
);
}
const m = Math.max(...data);
const numBins = Math.floor(m / s) + 1;
const bins = new Array(numBins).fill(0);
data.forEach((value) => {
const binIndex = Math.floor(value / s);
if (binIndex < numBins) {
bins[binIndex]++;
}
});
const maxCount = Math.max(...bins);
const margin = { top: 20, right: 20, bottom: 40, left: 50 };
const chartWidth = width - margin.left - margin.right;
const chartHeight = height - margin.top - margin.bottom;
const barWidth = chartWidth / numBins;
return (
<svg
data-testid={testid}
width={width}
height={height}
style={{ border: "1px solid #ccc" }}
>
{/* Y-axis */}
<line
x1={margin.left}
y1={margin.top}
x2={margin.left}
y2={height - margin.bottom}
stroke="black"
strokeWidth="2"
/>
{/* X-axis */}
<line
x1={margin.left}
y1={height - margin.bottom}
x2={width - margin.right}
y2={height - margin.bottom}
stroke="black"
strokeWidth="2"
/>
{/* Y-axis label */}
<text
x={15}
y={height / 2}
textAnchor="middle"
transform={`rotate(-90 15 ${height / 2})`}
fontSize="12"
>
{yLabel}
</text>
{/* X-axis label */}
<text x={width / 2} y={height - 5} textAnchor="middle" fontSize="12">
{xLabel}
</text>
{/* Bars */}
{bins.map((count, i) => {
const barHeight = calculateBarHeight(count, maxCount, chartHeight);
const x = margin.left + i * barWidth;
const y = height - margin.bottom - barHeight;
return (
<g key={i}>
<rect
x={x}
y={y}
width={barWidth}
height={barHeight}
fill="#4A90E2"
stroke="#2E5C8A"
strokeWidth="1"
data-testid={`histogram-bar-${i}`}
/>
{/* X-axis tick labels - only show for every few bins to avoid crowding */}
{i % Math.ceil(numBins / 8) === 0 && (
<>
<line
x1={x}
y1={height - margin.bottom}
x2={x}
y2={height - margin.bottom + 5}
stroke="black"
strokeWidth="1"
/>
<text
x={x}
y={height - margin.bottom + 20}
textAnchor="middle"
fontSize="10"
>
{i * s}
</text>
</>
)}
</g>
);
})}
{/* End label for rightmost bin */}
<text
x={width - margin.right}
y={height - margin.bottom + 20}
textAnchor="end"
fontSize="10"
>
{(numBins - 1) * s + s}
</text>
{/* Y-axis tick marks and labels */}
{maxCount > 0 &&
Array.from({ length: 5 }).map((_, i) => {
const tickValue = Math.round((i / 4) * maxCount);
const y = height - margin.bottom - (i / 4) * chartHeight;
return (
<g key={`tick-${i}`}>
<line
x1={margin.left - 5}
y1={y}
x2={margin.left}
y2={y}
stroke="black"
strokeWidth="1"
/>
<text
x={margin.left - 10}
y={y + 3}
textAnchor="end"
fontSize="10"
>
{tickValue}
</text>
</g>
);
})}
</svg>
);
}
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