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import {useTranslation} from 'react-i18next';
import {Line} from 'react-chartjs-2';
import {
BarController,
BarElement,
CategoryScale,
Chart as ChartJS,
Filler,
Legend,
LinearScale,
LineElement,
PointElement,
Tooltip,
} from 'chart.js';
ChartJS.register(
CategoryScale,
LinearScale,
PointElement,
LineElement,
Tooltip,
Legend,
Filler,
BarElement,
BarController
);
/**
* TradingPerformanceChart component renders a line chart showing trading returns performance,
* either monthly or annual, with light/dark theme support.
*
* It listens for changes in the `dark` CSS class on the document element to update colors dynamically.
* Users can switch between monthly and annual views via a select dropdown.
* The chart is rendered with `react-chartjs-2` and `chart.js`.
* Below the chart, a summary section shows detailed monthly returns by year or annual returns,
* with color-coded positive/negative values.
*
* Translations are supported via react-i18next.
*
* @component
* @module components/ui/TradingPerformanceChart
* @returns {JSX.Element} The trading performance chart section.
*/
export default function TradingPerformanceChart() {
const {t} = useTranslation();
const months = [
t('months.jan'),
t('months.feb'),
t('months.mar'),
t('months.apr'),
t('months.may'),
t('months.jun'),
t('months.jul'),
t('months.aug'),
t('months.sep'),
t('months.oct'),
t('months.nov'),
t('months.dec')
];
const annualLabels = [
t('annual_labels.2022'),
t('annual_labels.2023'),
t('annual_labels.2024'),
t('annual_labels.2025_partial')
];
const annualReturns = [-10.92, 18.51, 8.83, 8.69];
const monthlyReturns = [
-3.58, -1.38, 5.29, -6.27, 0.27, -8.29, 8.74, -3.13, -7.78, 3.44, 7.52, -4.44,
6.54, -1.86, 2.85, -0.81, 1.96, 3.78, 2.68, -3.01, -3.98, -2.98, 8.07, 4.73,
-1.26, 2.19, 2.16, -2.68, 4.98, -0.01, 3.18, 2.5, 1.89, -2.89, 1.48, -2.68,
1.87, -0.41, -1.84, 0.93, 5.78, 3.28, null, null, null, null, null, null,
];
const getCumulativeSum = (returns) => {
let sum = 0;
return returns.map((r) => {
if (r == null) return null;
sum += r;
return +sum.toFixed(2);
});
};
const [isDark, setIsDark] = useState(() =>
document.documentElement.classList.contains('dark')
);
const [view, setView] = useState('monthly');
useEffect(() => {
const observer = new MutationObserver(() =>
setIsDark(document.documentElement.classList.contains('dark'))
);
observer.observe(document.documentElement, {attributes: true, attributeFilter: ['class']});
return () => observer.disconnect();
}, []);
const isMonthly = view === 'monthly';
const labels = isMonthly
? [2022, 2023, 2024, 2025].flatMap((year) =>
months.map((m) => `${m} ${year}`)
)
: annualLabels;
const dataSet = isMonthly ? monthlyReturns : annualReturns;
const cumulative = useMemo(() => getCumulativeSum(dataSet), [dataSet]);
const cumulativeColor = useMemo(() => {
const last = cumulative.filter((v) => v != null).at(-1) ?? 0;
return last >= 0
? isDark ? '#7ee787' : '#22c55e'
: isDark ? '#ff6b81' : '#dc2626';
}, [cumulative, isDark]);
const positive = dataSet.map((v) => (v != null && v > 0 ? v : 0));
const negative = dataSet.map((v) => (v != null && v < 0 ? v : 0));
const chartData = {
labels,
datasets: [
{
type: 'line',
label: String(t('performance_cumulative')),
data: cumulative,
borderColor: cumulativeColor,
backgroundColor: 'transparent',
borderWidth: 3,
pointRadius: 4,
pointHoverRadius: 6,
spanGaps: true,
tension: isMonthly ? 0.3 : 0,
},
{
type: 'bar',
label: String(t('performance_positive')),
data: positive,
backgroundColor: isDark ? 'rgba(126, 231, 135, 0.8)' : 'rgba(74, 222, 128, 0.8)',
stack: 'stack1',
},
{
type: 'bar',
label: String(t('performance_negative')),
data: negative,
backgroundColor: isDark ? 'rgba(255, 99, 132, 0.8)' : 'rgba(239, 68, 68, 0.8)',
stack: 'stack1',
},
],
};
const options = {
responsive: true,
maintainAspectRatio: false,
scales: {
y: {
stacked: true,
beginAtZero: true,
ticks: {
color: isDark ? '#ddd' : '#333',
callback: (val) => `${val}%`,
},
grid: {
color: isDark ? '#444' : '#ddd',
},
},
x: {
stacked: true,
ticks: {
color: isDark ? '#ddd' : '#333',
autoSkip: true,
maxTicksLimit: 20,
},
grid: {
color: isDark ? '#444' : '#ddd',
},
},
},
plugins: {
legend: {
labels: {
color: isDark ? '#eee' : '#333',
font: {size: 14, weight: 'bold'},
},
},
tooltip: {
mode: 'index',
intersect: false,
callbacks: {
label: (ctx) => {
const val = ctx.parsed.y;
return `${ctx.dataset.label}: ${val >= 0 ? '+' : ''}${val}%`;
},
},
},
},
};
function renderSummary() {
if (isMonthly) {
const years = {2022: 0, 2023: 12, 2024: 24, 2025: 36};
return (
<div className="space-y-8">
{Object.entries(years).map(([year, idx]) => {
const data = monthlyReturns.slice(idx, idx + 12);
return (
<div key={year} className="space-y-2">
<div className="text-lg font-bold text-gray-900 dark:text-gray-100">{year}</div>
<div className="sm:hidden overflow-x-auto">
<div className="flex gap-2 min-w-[720px]">
{data.map((val, i) => (
<ValueBox key={i} value={val} label={months[i]}/>
))}
</div>
</div>
<div className="hidden sm:grid grid-cols-12 gap-2">
{data.map((val, i) => (
<ValueBox key={i} value={val} label={months[i]}/>
))}
</div>
</div>
);
})}
</div>
);
}
return (
<div className="flex flex-wrap justify-center gap-4 text-center text-sm">
{annualLabels.map((year, i) => (
<div
key={year}
className="p-4 bg-gray-100 dark:bg-gray-800 rounded-lg shadow-md w-full sm:w-40"
>
<h4 className="mb-2 font-semibold text-lg border-b border-gray-300 dark:border-gray-700 pb-1">
{year}
</h4>
<p
className={
annualReturns[i] < 0
? 'text-red-600 dark:text-red-400'
: 'text-green-700 dark:text-green-400'
}
>
{t('performance_return_label', 'Rendimento')}: {annualReturns[i] > 0 ? '+' : ''}
{annualReturns[i].toFixed(2).replace('.', ',')}%
</p>
</div>
))}
</div>
);
}
return (
<section
className="max-w-6xl mx-auto px-4 sm:px-6 py-6 bg-white dark:bg-gray-900 rounded-xl shadow-lg flex flex-col gap-6">
<header className="text-center flex flex-col items-center gap-4">
<h3 className="text-3xl font-bold text-gray-900 dark:text-gray-100">
{t('performance_title')}
</h3>
<select
className="rounded border border-gray-300 dark:border-gray-700 px-3 py-1 text-gray-900 dark:text-gray-100 bg-white dark:bg-gray-800 cursor-pointer"
value={view}
onChange={(e) => setView(e.target.value === 'annual' ? 'annual' : 'monthly')}
aria-label={t('performance_view_selector_aria')}
>
<option value="monthly">{t('performance_view_monthly')}</option>
<option value="annual">{t('performance_view_annual')}</option>
</select>
</header>
<div className="w-full h-[300px] sm:h-[500px] md:h-[700px]">
<Line data={chartData} options={options}/>
</div>
<div className="text-gray-800 dark:text-gray-300 text-sm space-y-6 text-center">
{renderSummary()}
</div>
</section>
);
}
function ValueBox({ value, label }) {
const color =
value == null
? 'text-gray-400 dark:text-gray-500'
: value < 0
? 'text-red-600 dark:text-red-400'
: 'text-green-600 dark:text-green-400';
return (
<div
className="flex flex-col items-center justify-center bg-white dark:bg-gray-800 rounded-md p-2 shadow-sm border border-gray-200 dark:border-gray-700 min-w-[60px]">
<span className={`text-sm font-semibold ${color}`}>
{value != null ? `${value.toFixed(2).replace('.', ',')}%` : 'na'}
</span>
<span className="mt-1 text-xs text-gray-600 dark:text-gray-400">{label}</span>
</div>
);
}
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