"use client";

import type { ComponentProps } from "react";
import {
  Area,
  AreaChart,
  Bar,
  BarChart,
  CartesianGrid,
  Cell,
  Legend,
  Line,
  LineChart,
  Pie,
  PieChart,
  ResponsiveContainer,
  Tooltip,
  XAxis,
  YAxis,
} from "recharts";

const TOOLTIP_STYLE = {
  background: "var(--panel)",
  border: "1px solid var(--line)",
  borderRadius: 12,
  fontSize: 12,
  color: "var(--ink)",
};

const LEGEND_STYLE = { fontSize: 12, overflow: "hidden" as const };
const LEGEND_STYLE_SM = { fontSize: 11, overflow: "hidden" as const };

/** 统一 Tooltip：关闭默认 cursor 灰框，避免选中/悬停黑边 */
function ChartTooltip(props: Omit<ComponentProps<typeof Tooltip>, "contentStyle" | "cursor">) {
  return <Tooltip {...props} cursor={false} contentStyle={TOOLTIP_STYLE} />;
}

function shortDate(d: string) {
  if (!d || d.length < 10) return d;
  return d.slice(5);
}

export function AdminChartCard({
  title,
  hint,
  children,
  actions,
}: {
  title: string;
  hint?: string;
  children: React.ReactNode;
  actions?: React.ReactNode;
}) {
  return (
    <div className="panel p-4 sm:p-5 flex flex-col min-h-[260px]">
      <div className="flex items-start justify-between gap-2 mb-3">
        <div className="min-w-0">
          <h3 className="text-[14.5px] font-semibold" style={{ color: "var(--ink)" }}>
            {title}
          </h3>
          {hint ? (
            <p className="meta text-[11.5px] mt-0.5 leading-relaxed">{hint}</p>
          ) : null}
        </div>
        {actions}
      </div>
      {/* 捕获阶段拦截 mousedown：冒泡阶段太晚，浏览器已开始 SVG 多柱选区黑框 */}
      <div
        className="flex-1 min-h-[180px] w-full overflow-hidden select-none [&_*]:select-none [&_svg]:outline-none [&_.recharts-surface]:outline-none [&_.recharts-tooltip-cursor]:hidden"
        onMouseDownCapture={(e) => e.preventDefault()}
      >
        {children}
      </div>
    </div>
  );
}

export function VisitTrendChart({
  data,
}: {
  data: { date: string; pv: number; uv: number }[];
}) {
  const rows = data.map((d) => ({ ...d, label: shortDate(d.date) }));
  return (
    <ResponsiveContainer width="100%" height={220}>
      <AreaChart data={rows} margin={{ top: 12, right: 12, left: 0, bottom: 0 }} accessibilityLayer={false}>
        <defs>
          <linearGradient id="j13Pv" x1="0" y1="0" x2="0" y2="1">
            <stop offset="0%" stopColor="var(--accent)" stopOpacity={0.35} />
            <stop offset="100%" stopColor="var(--accent)" stopOpacity={0} />
          </linearGradient>
          <linearGradient id="j13Uv" x1="0" y1="0" x2="0" y2="1">
            <stop offset="0%" stopColor="var(--ok)" stopOpacity={0.3} />
            <stop offset="100%" stopColor="var(--ok)" stopOpacity={0} />
          </linearGradient>
        </defs>
        <CartesianGrid stroke="var(--line)" strokeDasharray="3 3" vertical={false} />
        <XAxis dataKey="label" tick={{ fill: "var(--ink-3)", fontSize: 11 }} axisLine={false} tickLine={false} />
        <YAxis tick={{ fill: "var(--ink-3)", fontSize: 11 }} axisLine={false} tickLine={false} width={36} allowDecimals={false} />
        <ChartTooltip />
        <Legend wrapperStyle={LEGEND_STYLE} />
        <Area type="monotone" dataKey="pv" name="PV" stroke="var(--accent)" fill="url(#j13Pv)" strokeWidth={2} />
        <Area type="monotone" dataKey="uv" name="UV" stroke="var(--ok)" fill="url(#j13Uv)" strokeWidth={2} />
      </AreaChart>
    </ResponsiveContainer>
  );
}

export function DualLineChart({
  data,
  aKey,
  bKey,
  aName,
  bName,
  aColor = "var(--accent)",
  bColor = "var(--gold)",
}: {
  data: { date: string; [k: string]: string | number }[];
  aKey: string;
  bKey: string;
  aName: string;
  bName: string;
  aColor?: string;
  bColor?: string;
}) {
  const rows = data.map((d) => ({ ...d, label: shortDate(String(d.date)) }));
  return (
    <ResponsiveContainer width="100%" height={200}>
      <LineChart data={rows} margin={{ top: 12, right: 12, left: 0, bottom: 0 }} accessibilityLayer={false}>
        <CartesianGrid stroke="var(--line)" strokeDasharray="3 3" vertical={false} />
        <XAxis dataKey="label" tick={{ fill: "var(--ink-3)", fontSize: 11 }} axisLine={false} tickLine={false} />
        <YAxis tick={{ fill: "var(--ink-3)", fontSize: 11 }} axisLine={false} tickLine={false} width={36} allowDecimals={false} />
        <ChartTooltip />
        <Legend wrapperStyle={LEGEND_STYLE} />
        <Line type="monotone" dataKey={aKey} name={aName} stroke={aColor} strokeWidth={2} dot={false} />
        <Line type="monotone" dataKey={bKey} name={bName} stroke={bColor} strokeWidth={2} dot={false} />
      </LineChart>
    </ResponsiveContainer>
  );
}

export function SingleAreaChart({
  data,
  dataKey,
  name,
  color = "var(--accent)",
}: {
  data: { date: string; [k: string]: string | number }[];
  dataKey: string;
  name: string;
  color?: string;
}) {
  const rows = data.map((d) => ({ ...d, label: shortDate(String(d.date)) }));
  return (
    <ResponsiveContainer width="100%" height={200}>
      <AreaChart data={rows} margin={{ top: 12, right: 12, left: 0, bottom: 0 }} accessibilityLayer={false}>
        <CartesianGrid stroke="var(--line)" strokeDasharray="3 3" vertical={false} />
        <XAxis dataKey="label" tick={{ fill: "var(--ink-3)", fontSize: 11 }} axisLine={false} tickLine={false} />
        <YAxis tick={{ fill: "var(--ink-3)", fontSize: 11 }} axisLine={false} tickLine={false} width={36} allowDecimals={false} />
        <ChartTooltip />
        <Area type="monotone" dataKey={dataKey} name={name} stroke={color} fill={color} fillOpacity={0.15} strokeWidth={2} />
      </AreaChart>
    </ResponsiveContainer>
  );
}

const PIE_COLORS = [
  "var(--accent)",
  "var(--ok)",
  "var(--gold)",
  "var(--clay)",
  "var(--danger)",
  "#8b5cf6",
  "#06b6d4",
  "#84cc16",
];

export function NamedBarChart({
  data,
  layout = "vertical",
}: {
  data: { label: string; count: number }[];
  layout?: "vertical" | "horizontal";
}) {
  if (layout === "horizontal") {
    return (
      <ResponsiveContainer width="100%" height={Math.max(180, data.length * 28)}>
        <BarChart data={data} layout="vertical" margin={{ top: 8, right: 12, left: 8, bottom: 4 }} accessibilityLayer={false}>
          <CartesianGrid stroke="var(--line)" strokeDasharray="3 3" horizontal={false} />
          <XAxis type="number" tick={{ fill: "var(--ink-3)", fontSize: 11 }} axisLine={false} allowDecimals={false} />
          <YAxis type="category" dataKey="label" width={72} tick={{ fill: "var(--ink-2)", fontSize: 11 }} axisLine={false} tickLine={false} />
          <ChartTooltip />
          <Bar dataKey="count" name="数量" fill="var(--accent)" radius={[0, 6, 6, 0]} activeBar={false} />
        </BarChart>
      </ResponsiveContainer>
    );
  }
  return (
    <ResponsiveContainer width="100%" height={200}>
      <BarChart data={data} margin={{ top: 12, right: 12, left: 0, bottom: 0 }} accessibilityLayer={false}>
        <CartesianGrid stroke="var(--line)" strokeDasharray="3 3" vertical={false} />
        <XAxis dataKey="label" tick={{ fill: "var(--ink-3)", fontSize: 11 }} axisLine={false} tickLine={false} />
        <YAxis tick={{ fill: "var(--ink-3)", fontSize: 11 }} axisLine={false} tickLine={false} width={36} allowDecimals={false} />
        <ChartTooltip />
        <Bar dataKey="count" name="数量" fill="var(--accent)" radius={[6, 6, 0, 0]} activeBar={false} />
      </BarChart>
    </ResponsiveContainer>
  );
}

export function NamedPieChart({ data }: { data: { label: string; count: number }[] }) {
  const total = data.reduce((s, d) => s + d.count, 0) || 1;
  return (
    <ResponsiveContainer width="100%" height={200}>
      <PieChart accessibilityLayer={false}>
        <Pie data={data} dataKey="count" nameKey="label" innerRadius={48} outerRadius={72} paddingAngle={2}>
          {data.map((_, i) => (
            <Cell key={i} fill={PIE_COLORS[i % PIE_COLORS.length]} />
          ))}
        </Pie>
        <ChartTooltip
          formatter={(value, name) => {
            const n = typeof value === "number" ? value : Number(value) || 0;
            return [`${n}（${Math.round((n / total) * 100)}%）`, String(name ?? "")];
          }}
        />
        <Legend wrapperStyle={LEGEND_STYLE_SM} />
      </PieChart>
    </ResponsiveContainer>
  );
}

export function DeltaBarChart({
  data,
}: {
  data: { date: string; granted: number; spent: number }[];
}) {
  const rows = data.map((d) => ({ ...d, label: shortDate(d.date) }));
  return (
    <ResponsiveContainer width="100%" height={200}>
      <BarChart data={rows} margin={{ top: 12, right: 12, left: 0, bottom: 0 }} accessibilityLayer={false}>
        <CartesianGrid stroke="var(--line)" strokeDasharray="3 3" vertical={false} />
        <XAxis dataKey="label" tick={{ fill: "var(--ink-3)", fontSize: 11 }} axisLine={false} tickLine={false} />
        <YAxis tick={{ fill: "var(--ink-3)", fontSize: 11 }} axisLine={false} tickLine={false} width={40} allowDecimals={false} />
        <ChartTooltip />
        <Legend wrapperStyle={LEGEND_STYLE} />
        <Bar dataKey="granted" name="发放" fill="var(--ok)" radius={[4, 4, 0, 0]} activeBar={false} />
        <Bar dataKey="spent" name="消耗" fill="var(--clay)" radius={[4, 4, 0, 0]} activeBar={false} />
      </BarChart>
    </ResponsiveContainer>
  );
}