"use client";

import {
  TrendingUp,
  Download,
  Info,
  CheckCircle2,
  AlertTriangle,
  RefreshCw,
} from "lucide-react";
import { useMemo } from "react";
import { useSearchParams } from "next/navigation";
import { useAuth } from "@/components/AuthProvider";
import { useD4Metrics } from "@/hooks/useD4Metrics";
import { toD4UserId } from "@/lib/d4Metrics";
import { buildRuntimeMetrics, getRuntimeMetric, type MetricDataState } from "@/lib/metricRuntime";

export default function MetricsContent({ metricId }: { metricId: string }) {
  const searchParams = useSearchParams();
  const { user } = useAuth();

  const normalizedMetricId = metricId.toUpperCase();
  const isD4Metric = normalizedMetricId === "D4";
  const selectedStudentId = searchParams.get("student") || (user?.role === "stu" ? user.id : null);
  const selectedD4UserId = toD4UserId(selectedStudentId);

  const d4Query = useMemo(() => (selectedD4UserId ? { userId: selectedD4UserId } : {}), [selectedD4UserId]);
  const d4Metrics = useD4Metrics(d4Query, { enabled: isD4Metric });

  const runtimeMetrics = useMemo(
    () => buildRuntimeMetrics({ data: d4Metrics.data, error: d4Metrics.error, isLoading: d4Metrics.isLoading }),
    [d4Metrics.data, d4Metrics.error, d4Metrics.isLoading],
  );

  const metricObj = getRuntimeMetric(runtimeMetrics, normalizedMetricId);

  if (!metricObj) {
    return (
      <div className="flex-grow flex items-center justify-center p-8">
        <h2 className="text-xl text-secondary">未找到指标 {normalizedMetricId} 的详情</h2>
      </div>
    );
  }

  const getStateLabel = (state: MetricDataState, score: number | null) => {
    if (state === "loading") return { label: "加载中", class: "bg-primary/10 text-primary border-primary/30" };
    if (state === "error") return { label: "接口异常", class: "bg-metric-low/10 text-metric-low border-metric-low/30" };
    if (state === "unavailable") return { label: "未接入", class: "bg-surface-variant text-on-surface-variant border-outline-variant" };
    if (score == null) return { label: "已同步", class: "bg-primary/10 text-primary border-primary/30" };
    if (score >= 80) return { label: "良好", class: "bg-metric-high/10 text-metric-high border-metric-high/30" };
    if (score >= 70) return { label: "一般", class: "bg-metric-warn/10 text-metric-warn border-metric-warn/30" };
    return { label: "需改进", class: "bg-metric-low/10 text-metric-low border-metric-low/30" };
  };

  const scoreNum = metricObj.score;
  const chartScore = scoreNum ?? 0;
  const metricStatus = getStateLabel(metricObj.state, metricObj.score);

  return (
    <main className="flex-grow p-4 md:p-8 max-w-7xl mx-auto w-full grid grid-cols-1 lg:grid-cols-12 gap-6">
      <aside className="lg:col-span-4 xl:col-span-3 space-y-6">
        <div className="bg-surface rounded-2xl p-6 shadow-elevation-1 border border-outline-variant">
          <div className="flex items-center gap-2 mb-4">
            <span className={`w-2 h-8 rounded-full bg-${metricObj.colorClass}`}></span>
            <h2 className="text-lg font-medium text-on-surface">
              {metricObj.id} - {metricObj.name}
            </h2>
          </div>
          <div className="flex flex-col items-center justify-center py-8 relative">
            <div
              className="absolute w-40 h-40 rounded-full opacity-20 blur-2xl"
              style={{ backgroundColor: `var(--color-${metricObj.colorClass})` }}
            ></div>

            <div className="relative w-40 h-40 flex items-center justify-center rounded-full bg-surface shadow-elevation-2 border border-outline-variant/30">
              <svg
                className="absolute w-full h-full transform -rotate-90 drop-shadow-md"
                viewBox="0 0 100 100"
              >
                <circle
                  cx="50"
                  cy="50"
                  r="44"
                  fill="transparent"
                  className="stroke-surface-variant flex-shrink-0"
                  strokeWidth="6"
                />
                <circle
                  cx="50"
                  cy="50"
                  fill="transparent"
                  r="44"
                  style={{ stroke: scoreNum == null ? "var(--color-outline-variant)" : `var(--color-${metricObj.colorClass})` }}
                  strokeDasharray={`${(chartScore / 100) * 276.46} 276.46`}
                  strokeDashoffset="0"
                  strokeLinecap="round"
                  strokeWidth="8"
                  className="transition-all duration-1000 ease-out"
                ></circle>
              </svg>
              <div className="text-center z-10 flex flex-col items-center justify-center bg-surface w-28 h-28 rounded-full shadow-inner border border-outline-variant/10">
                <span
                  className="text-4xl font-display font-bold tracking-tight"
                  style={{ color: scoreNum == null ? "var(--color-outline)" : `var(--color-${metricObj.colorClass})` }}
                >
                  {scoreNum ?? "--"}
                </span>
                <span className="block text-[0.65rem] text-on-surface-variant uppercase tracking-widest mt-1 font-medium">
                  指标值
                </span>
              </div>
            </div>
          </div>
          <div className="space-y-4 mt-2">
            <div className="flex justify-between items-center text-sm">
              <span className="text-on-surface-variant">
                数据状态
              </span>
              <span className={`flex items-center font-medium px-2 py-0.5 rounded-md border ${metricStatus.class}`}>
                <TrendingUp className="w-4 h-4 mr-1" /> {metricStatus.label}
              </span>
            </div>
            <p className="text-xs text-outline leading-relaxed">
              {metricObj.summary}
            </p>
          </div>
          <div className="mt-6 pt-6 border-t border-outline-variant space-y-3">
            {isD4Metric && (
              <button
                type="button"
                onClick={d4Metrics.refetch}
                className="w-full border border-outline-variant text-on-surface h-10 rounded-full font-medium text-sm hover:bg-surface-container-high transition-all flex items-center justify-center gap-2 cursor-pointer"
              >
                <RefreshCw className="w-4 h-4" /> 刷新数据
              </button>
            )}
            <button className="w-full bg-primary text-on-primary h-10 rounded-full font-medium text-sm shadow-md hover:shadow-lg transition-all flex items-center justify-center gap-2 cursor-pointer">
              <Download className="w-5 h-5" /> 导出报告
            </button>
          </div>
        </div>
        <div className={`${metricObj.bgClass} rounded-2xl p-6`}>
          <h3 className="font-medium mb-2 flex items-center gap-2">
            <Info className="w-5 h-5" /> 指标说明
          </h3>
          <p className="text-sm opacity-90 leading-relaxed font-light">
            {metricObj.description}
          </p>
        </div>
      </aside>

      <section className="lg:col-span-8 xl:col-span-9 space-y-6">
        <div className="flex flex-col md:flex-row md:items-center justify-between mb-2">
          <div>
            <h2 className="text-2xl font-medium text-on-background">
              子指标分析
            </h2>
            <p className="text-on-surface-variant text-sm mt-1">
              关于 {metricObj.id} 的详细数据维度拆解
            </p>
          </div>
        </div>

        <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
          {metricObj.subMetrics.map((sub) => {
            const subStatus = getStateLabel(sub.state, sub.score);
            const isWarn = sub.state === "error" || (sub.score != null && sub.score < 70);

            return (
              <article key={sub.id} className="bg-surface rounded-xl p-0 shadow-elevation-1 border border-outline-variant overflow-hidden flex flex-col h-full hover:shadow-elevation-2 hover:bg-surface-container transition-all duration-300 group">
                <div className="p-5 border-b border-outline-variant bg-surface-variant/20">
                  <div className="flex justify-between items-start gap-4">
                    <div>
                      <span className={`text-xs font-bold tracking-wider uppercase text-${metricObj.colorClass}`}>
                        {sub.id}
                      </span>
                      <h3 className="text-lg font-medium text-on-surface mt-1">
                        {sub.name}
                      </h3>
                    </div>
                    <span className={`w-8 h-8 rounded-full flex items-center justify-center shrink-0 ${isWarn ? "bg-metric-warn/10 text-metric-warn" : "bg-metric-high/10 text-metric-high"}`}>
                      {isWarn ? <AlertTriangle className="w-5 h-5" /> : <CheckCircle2 className="w-5 h-5" />}
                    </span>
                  </div>
                </div>
                <div className="p-5 flex-grow space-y-5">
                  {sub.values.map((val, idx) => {
                    const valueStatus = getStateLabel(val.state, val.score);

                    return (
                      <div key={idx} className="flex flex-col gap-2">
                        <div className="flex items-start justify-between gap-3">
                          <div className="flex items-start gap-3 min-w-0">
                            <CheckCircle2 className="text-on-surface-variant w-5 h-5 mt-0.5 shrink-0" />
                            <div className="min-w-0">
                              <p className="text-sm font-medium text-on-surface leading-tight">
                                {val.name}
                              </p>
                              {val.helperText && (
                                <p className="text-xs text-outline mt-1 leading-relaxed">
                                  {val.helperText}
                                </p>
                              )}
                            </div>
                          </div>
                          <div className="text-right whitespace-nowrap ml-2">
                            <span className={`block text-xl font-bold ${val.score == null ? "text-on-surface" : val.score < 70 ? "text-metric-warn" : "text-metric-high"}`}>
                              {val.displayValue}
                            </span>
                            <span className={`inline-flex text-[10px] font-bold border px-2 py-0.5 rounded-full mt-1 ${valueStatus.class}`}>
                              {valueStatus.label}
                            </span>
                          </div>
                        </div>
                        {val.progress != null && (
                          <div className="w-full bg-surface-variant rounded-full h-1.5 mt-1">
                            <div
                              className={`h-1.5 rounded-full ${val.progress < 70 ? "bg-metric-warn" : "bg-metric-high"}`}
                              style={{ width: `${val.progress}%` }}
                            ></div>
                          </div>
                        )}
                      </div>
                    );
                  })}
                  <div className="w-full bg-surface-variant rounded-full h-1.5 mt-2">
                    <div
                      className={`h-1.5 rounded-full ${sub.score != null && sub.score < 70 ? "bg-metric-warn" : "bg-metric-high"}`}
                      style={{ width: `${sub.score ?? 0}%` }}
                    ></div>
                  </div>
                </div>
                <div className="px-5 py-3 bg-surface-variant/10 flex justify-end border-t border-outline-variant/50">
                  <span className={`text-xs font-bold px-3 py-1 rounded-full border ${subStatus.class}`}>
                    {subStatus.label}
                  </span>
                </div>
              </article>
            );
          })}
        </div>
      </section>
    </main>
  );
}