"use client";

import {
	CartesianGrid,
	Line,
	LineChart,
	ResponsiveContainer,
	Tooltip,
	XAxis,
	YAxis,
} from "recharts";
import { cn } from "@/lib/utils";

export type Round = {
	iteration: number;
	runDic: number;
	label: string;
	timestamp: string;
	values: Record<string, number | null>;
};

export type MetricsHistory = {
	metrics: string[];
	rounds: Round[];
};

const METRIC_LABELS: Record<string, string> = {
	req_set_car: "需求集合(车载)",
	dapan_car: "大盘车载",
	specific_test: "Specific Test",
	target_subset: "目标集合",
	icl_test: "ICL Test",
	overall: "大盘整体",
	triage_err_rate: "Triage 错误率",
	bvt_nav: "导航BVT",
	talkable_controllable: "可聊可控",
	badcase_2025: "Badcase 2025",
	autotask: "自动任务",
	target_subset_count: "目标子集数量",
	target_subset_wrong: "目标子集错误数",
	target_subset_correct: "目标子集正确数",
	target_subset_acc: "目标子集准确率",
	icl_test_overall: "ICL 测试整体",
	specific_test_overall: "专项测试整体",
	overrall: "大盘集",
	overrall_che_zai: "大盘集车载",
	overrall_shou_ji: "大盘集手机",
	overrall_dian_shi: "大盘集电视",
	overrall_yan_jing: "大盘集眼镜",
	overrall_you_ping: "大盘集有屏",
	overrall_wu_ping: "大盘集无屏",
};

const LINE_COLORS = [
	"#34d399", // emerald
	"#38bdf8", // sky
	"#a78bfa", // violet
	"#fbbf24", // amber
	"#f472b6", // rose
	"#22d3ee", // cyan
	"#a3e635", // lime
	"#fb923c", // orange
];

function labelOf(key: string): string {
	return METRIC_LABELS[key] ?? key;
}

function formatValue(v: number | null | undefined): string {
	if (v === null || v === undefined || Number.isNaN(v)) return "—";
	return v.toFixed(4);
}

function formatDelta(curr: number | null | undefined, base: number | null | undefined): {
	text: string;
	tone: "up" | "down" | "flat";
} {
	if (
		curr === null ||
		curr === undefined ||
		base === null ||
		base === undefined ||
		Number.isNaN(curr) ||
		Number.isNaN(base)
	) {
		return { text: "—", tone: "flat" };
	}
	const d = curr - base;
	if (Math.abs(d) < 1e-6) return { text: "±0", tone: "flat" };
	const sign = d > 0 ? "+" : "";
	return { text: `${sign}${d.toFixed(4)}`, tone: d > 0 ? "up" : "down" };
}

function chartRowsFor(history: MetricsHistory, key: string): Array<Record<string, unknown>> {
	return history.rounds.map((r) => {
		const v = r.values[key];
		return {
			label: r.label,
			[key]: v === undefined || v === null ? null : v,
		};
	});
}

export function MetricsChartPanel({ history }: { history: MetricsHistory | null }) {
	if (!history || history.rounds.length === 0) {
		return (
			<div className="flex h-full items-center justify-center text-zinc-500 text-xs">
				暂无指标数据，等首轮分析完成
			</div>
		);
	}

	const latest = history.rounds[history.rounds.length - 1];
	const baseline = history.rounds[0];
	const prev =
		history.rounds.length >= 2 ? history.rounds[history.rounds.length - 2] : baseline;

	const colorFor = (key: string): string => {
		const idx = history.metrics.indexOf(key);
		return LINE_COLORS[idx >= 0 ? idx % LINE_COLORS.length : 0];
	};

	return (
		<div className="h-full min-h-0 overflow-y-auto pr-1">
			<div className="grid gap-2 [grid-template-columns:repeat(auto-fit,minmax(280px,1fr))]">
				{history.metrics.map((k) => {
					const curr = latest.values[k];
					const dBase = formatDelta(curr, baseline.values[k]);
					const dPrev = formatDelta(curr, prev.values[k]);
					const color = colorFor(k);
					const rows = chartRowsFor(history, k);
					return (
						<div
							key={k}
							className="flex flex-col rounded-md border border-zinc-800 bg-zinc-900/40 p-2"
						>
							<div className="flex shrink-0 items-baseline justify-between gap-2">
								<div className="flex items-center gap-1.5 min-w-0">
									<span
										className="size-1.5 shrink-0 rounded-full"
										style={{ backgroundColor: color }}
									/>
									<span className="truncate font-medium text-[11px] text-zinc-200">
										{labelOf(k)}
									</span>
								</div>
								<span className="font-mono font-semibold text-[14px] text-zinc-50 leading-none">
									{formatValue(curr)}
								</span>
							</div>
							<div className="mt-0.5 flex shrink-0 gap-2 font-mono text-[10px]">
								<span className={deltaClass(dBase.tone)}>
									Δbase {dBase.text}
								</span>
								<span className={deltaClass(dPrev.tone)}>
									Δprev {dPrev.text}
								</span>
							</div>
							<div className="mt-1.5 h-32">
								<ResponsiveContainer width="100%" height="100%">
									<LineChart
										data={rows}
										margin={{ top: 4, right: 8, left: -12, bottom: 0 }}
									>
										<CartesianGrid stroke="#27272a" strokeDasharray="3 3" />
										<XAxis
											dataKey="label"
											stroke="#a1a1aa"
											tick={{ fontSize: 10 }}
										/>
										<YAxis
											stroke="#a1a1aa"
											tick={{ fontSize: 10 }}
											tickFormatter={(v: number) =>
												typeof v === "number" ? v.toFixed(4) : v
											}
											domain={["auto", "auto"]}
											width={60}
										/>
										<Tooltip
											contentStyle={{
												background: "#18181b",
												border: "1px solid #3f3f46",
												borderRadius: 6,
												fontSize: 11,
											}}
											labelStyle={{ color: "#e4e4e7" }}
											itemStyle={{ color: "#e4e4e7" }}
											formatter={(value: number, name: string) => [
												typeof value === "number" ? value.toFixed(4) : value,
												labelOf(name),
											]}
										/>
										<Line
											type="monotone"
											dataKey={k}
											stroke={color}
											strokeWidth={1.5}
											dot={{ r: 2.5 }}
											activeDot={{ r: 4 }}
											connectNulls={false}
											isAnimationActive={false}
										/>
									</LineChart>
								</ResponsiveContainer>
							</div>
						</div>
					);
				})}
			</div>
		</div>
	);
}

function deltaClass(tone: "up" | "down" | "flat"): string {
	if (tone === "up") return "text-emerald-400";
	if (tone === "down") return "text-rose-400";
	return "text-zinc-500";
}