export type ChartRow<T> = { item: T; value: number; even: boolean };
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/** 图表取值：0 不画；碳减排可为负，展示时取绝对值。 */
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export function chartValue(raw: number, carbon = false) {
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const n = Number(raw);
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if (!Number.isFinite(n) || n === 0) return 0;
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return carbon ? Math.abs(n) : n;
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}
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/**
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* 分类图数据：
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* - 部分有值：只保留当前指标 > 0 的类
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* - 全部为 0：evenSplit 时均分扇区（value=1 仅用于几何，even 标记给 tooltip 显示 0）
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*/
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export function chartSeries<T>(
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items: T[] | undefined,
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pick: (item: T) => number,
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opts?: { carbon?: boolean; evenSplit?: boolean }
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): ChartRow<T>[] {
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const list = items || [];
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const rows = list.map(item => ({
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item,
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raw: chartValue(pick(item), opts?.carbon)
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}));
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const positive = rows.filter(e => e.raw > 0);
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if (positive.length) {
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return positive.map(e => ({ item: e.item, value: e.raw, even: false }));
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}
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if (opts?.evenSplit === false) {
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return rows.map(e => ({ item: e.item, value: 0, even: false }));
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}
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return rows.map(e => ({ item: e.item, value: 1, even: true }));
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}
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export function pieTooltipFormatter(unit = '') {
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return (p: any) => {
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const val = p.data?.even ? 0 : p.value;
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const u = unit ? ` ${unit}` : '';
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const pct = p.percent != null ? ` (${p.percent}%)` : '';
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return `${p.name}<br/>${val}${u}${pct}`;
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};
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}
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export function toPieData<T>(
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rows: ChartRow<T>[],
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name: (item: T) => string,
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color: (item: T) => string | undefined
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) {
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return rows.map(row => ({
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name: name(row.item),
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value: row.value,
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even: row.even,
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itemStyle: { color: color(row.item) }
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}));
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}
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