"use client";

import { useState, useEffect } from "react";
import { useRouter, useParams } from "next/navigation";
import { useSession } from "next-auth/react";
import { Button } from "@/components/ui/button";
import { Card, CardContent } from "@/components/ui/card";
import { FavoriteButton } from "@/components/common/FavoriteButton";
import { ReviewSection } from "@/components/common/ReviewSection";

interface ToolDetail {
  id: number;
  name: string;
  slug: string;
  description: string;
  logoUrl: string | null;
  websiteUrl: string;
  pricingModel: string;
  pricingDetail: string | null;
  features: unknown;
  tags: unknown;
  viewCount: number;
  favorited?: boolean;
  favoriteCount?: number;
  category: { id: number; name: string; slug: string } | null;
  createdAt: string;
  updatedAt: string;
}

const pricingLabel: Record<string, string> = {
  free: "免费",
  freemium: "免费增值",
  paid: "付费",
  subscription: "订阅",
};

const pricingColor: Record<string, string> = {
  free: "bg-emerald-50 text-emerald-700 border border-emerald-200",
  freemium: "bg-blue-50 text-blue-700 border border-blue-200",
  paid: "bg-amber-50 text-amber-700 border border-amber-200",
  subscription: "bg-purple-50 text-purple-700 border border-purple-200",
};

const pricingIcon: Record<string, string> = {
  free: "M5 3v4M3 5h4M6 17v4m-2-2h4m5-16l2.286 6.857L21 12l-5.714 2.143L13 21l-2.286-6.857L5 12l5.714-2.143L13 3z",
  freemium: "M13 10V3L4 14h7v7l9-11h-7z",
  paid: "M12 8c-1.657 0-3 .895-3 2s1.343 2 3 2 3 .895 3 2-1.343 2-3 2m0-8c1.11 0 2.08.402 2.599 1M12 8V7m0 1v8m0 0v1m0-1c-1.11 0-2.08-.402-2.599-1M21 12a9 9 0 11-18 0 9 9 0 0118 0z",
  subscription: "M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15",
};

const tagColors = [
  "border-blue-200 bg-blue-50 text-blue-700",
  "border-purple-200 bg-purple-50 text-purple-700",
  "border-emerald-200 bg-emerald-50 text-emerald-700",
  "border-amber-200 bg-amber-50 text-amber-700",
  "border-pink-200 bg-pink-50 text-pink-700",
  "border-cyan-200 bg-cyan-50 text-cyan-700",
  "border-indigo-200 bg-indigo-50 text-indigo-700",
  "border-rose-200 bg-rose-50 text-rose-700",
];

export default function ToolDetailPage() {
  const router = useRouter();
  const params = useParams();
  const slug = params.slug as string;
  const { status } = useSession();

  const [tool, setTool] = useState<ToolDetail | null>(null);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState("");

  useEffect(() => {
    fetch(`/api/tools/${slug}`)
      .then((r) => {
        if (!r.ok) throw new Error("工具不存在");
        return r.json();
      })
      .then((data) => {
        setTool(data);
        if (status === "authenticated" && data?.id) {
          fetch("/api/user/history", {
            method: "POST",
            headers: { "Content-Type": "application/json" },
            body: JSON.stringify({ toolId: data.id }),
          }).catch(() => {});
        }
      })
      .catch((e) => setError(e.message))
      .finally(() => setLoading(false));
  }, [slug, status]);

  if (loading) {
    return (
      <div className="mx-auto max-w-4xl px-4 py-12 sm:px-6 lg:px-8">
        <div className="animate-pulse space-y-8">
          <div className="h-4 w-20 rounded bg-muted/40" />
          <div className="rounded-2xl border border-border/50 bg-white p-8 shadow-[0_1px_3px_rgba(0,0,0,0.06),0_1px_2px_rgba(0,0,0,0.04)]">
            <div className="flex gap-6">
              <div className="h-20 w-20 rounded-2xl bg-muted/40" />
              <div className="flex-1 space-y-3">
                <div className="h-8 w-56 rounded bg-muted/40" />
                <div className="h-5 w-40 rounded bg-muted/30" />
              </div>
            </div>
            <div className="mt-8 space-y-2">
              <div className="h-4 w-full rounded bg-muted/30" />
              <div className="h-4 w-3/4 rounded bg-muted/30" />
              <div className="h-4 w-1/2 rounded bg-muted/20" />
            </div>
          </div>
        </div>
      </div>
    );
  }

  if (error || !tool) {
    return (
      <div className="mx-auto flex max-w-4xl flex-col items-center px-4 py-24 sm:px-6 lg:px-8">
        <div className="flex h-20 w-20 items-center justify-center rounded-2xl bg-muted/30 border border-border/30">
          <svg width="32" height="32" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="1.5" className="text-muted-foreground/40">
            <path strokeLinecap="round" strokeLinejoin="round" d="M9.172 16.172a4 4 0 015.656 0M9 10h.01M15 10h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z" />
          </svg>
        </div>
        <p className="mt-5 text-lg font-medium text-muted-foreground">{error || "工具不存在"}</p>
        <Button variant="outline" className="mt-4" onClick={() => router.back()}>
          返回
        </Button>
      </div>
    );
  }

  const features = Array.isArray(tool.features) ? tool.features : [];
  const tags = Array.isArray(tool.tags) ? tool.tags : [];

  return (
    <div className="relative">
      <div className="pointer-events-none absolute inset-0 overflow-hidden">
        <div className="absolute -top-20 left-1/4 h-[400px] w-[600px] rounded-full bg-primary/5 blur-[120px]" />
        <div className="absolute top-40 right-0 h-[300px] w-[300px] rounded-full bg-purple-500/4 blur-[80px]" />
        <div className="absolute bottom-20 -left-20 h-[250px] w-[250px] rounded-full bg-cyan-500/3 blur-[80px]" />
      </div>

      <div className="relative mx-auto max-w-4xl px-4 py-8 sm:px-6 lg:px-8 animate-fade-in">
        <nav className="mb-8 flex items-center gap-2 text-sm text-muted-foreground">
          <button onClick={() => router.push("/")} className="transition-colors hover:text-foreground">首页</button>
          <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2"><path strokeLinecap="round" strokeLinejoin="round" d="M9 5l7 7-7 7" /></svg>
          <button onClick={() => router.push("/tools")} className="transition-colors hover:text-foreground">全部工具</button>
          <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2"><path strokeLinecap="round" strokeLinejoin="round" d="M9 5l7 7-7 7" /></svg>
          <span className="text-foreground truncate max-w-[200px]">{tool.name}</span>
        </nav>

        <div className="rounded-2xl border border-border/60 bg-white p-6 sm:p-8 shadow-[0_1px_3px_rgba(0,0,0,0.06),0_4px_12px_rgba(0,0,0,0.04)]">
          <div className="relative z-10 flex flex-col gap-6 sm:flex-row sm:items-start">
            <div className="shrink-0">
              {tool.logoUrl ? (
                <img
                  src={tool.logoUrl}
                  referrerPolicy="no-referrer"
                  alt=""
                  className="h-20 w-20 rounded-2xl border border-border/50 bg-white object-contain p-1.5 shadow-md"
                />
              ) : (
                <div className="flex h-20 w-20 items-center justify-center rounded-2xl border border-border/40 bg-gradient-to-br from-primary/10 to-primary/5 text-3xl font-bold text-primary shadow-md">
                  {tool.name.charAt(0)}
                </div>
              )}
            </div>

            <div className="min-w-0 flex-1">
              <div className="flex items-center gap-3">
                <h1 className="text-3xl font-bold tracking-tight">{tool.name}</h1>
                <FavoriteButton type="tool" id={tool.id} initialFavorited={tool.favorited ?? false} />
              </div>
              <div className="mt-3 flex flex-wrap items-center gap-2">
                {tool.category && (
                  <button
                    onClick={() => router.push(`/categories/${tool.category!.slug}`)}
                    className="inline-flex items-center gap-1.5 rounded-lg border border-border/60 bg-white px-2.5 py-1 text-xs text-muted-foreground transition-all duration-200 hover:border-primary/30 hover:text-foreground hover:bg-white hover:shadow-sm"
                  >
                    <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2"><path strokeLinecap="round" strokeLinejoin="round" d="M3 7v10a2 2 0 002 2h14a2 2 0 002-2V9a2 2 0 00-2-2h-6l-2-2H5a2 2 0 00-2 2z" /></svg>
                    {tool.category.name}
                  </button>
                )}
                <span className={`inline-flex items-center gap-1.5 rounded-lg border px-2.5 py-1 text-xs font-medium ${pricingColor[tool.pricingModel] || "bg-secondary text-muted-foreground border-border"}`}>
                  <svg width="10" height="10" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
                    <path d={pricingIcon[tool.pricingModel] || "M12 8c-1.657 0-3 .895-3 2s1.343 2 3 2 3 .895 3 2-1.343 2-3 2m0-8c1.11 0 2.08.402 2.599 1M12 8V7m0 1v8m0 0v1m0-1c-1.11 0-2.08-.402-2.599-1M21 12a9 9 0 11-18 0 9 9 0 0118 0z"} />
                  </svg>
                  {pricingLabel[tool.pricingModel] || tool.pricingModel}
                </span>
                {tool.pricingDetail && (
                  <span className="text-xs text-muted-foreground/60">{tool.pricingDetail}</span>
                )}
                <span className="inline-flex items-center gap-1.5 rounded-lg border border-border/60 bg-white px-2.5 py-1 text-xs text-muted-foreground">
                  <svg width="10" height="10" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2"><path strokeLinecap="round" strokeLinejoin="round" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" /><path strokeLinecap="round" strokeLinejoin="round" d="M2.458 12C3.732 7.943 7.523 5 12 5c4.478 0 8.268 2.943 9.542 7-1.274 4.057-5.064 7-9.542 7-4.477 0-8.268-2.943-9.542-7z" /></svg>
                  {tool.viewCount} 次浏览
                </span>
                {tool.favoriteCount !== undefined && (
                  <span className="inline-flex items-center gap-1.5 rounded-lg border border-border/60 bg-white px-2.5 py-1 text-xs text-muted-foreground">
                    <svg width="10" height="10" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2"><path strokeLinecap="round" strokeLinejoin="round" d="M4.318 6.318a4.5 4.5 0 000 6.364L12 20.364l7.682-7.682a4.5 4.5 0 00-6.364-6.364L12 7.636l-1.318-1.318a4.5 4.5 0 00-6.364 0z" /></svg>
                    {tool.favoriteCount} 人收藏
                  </span>
                )}
              </div>
            </div>

            <a
              href={tool.websiteUrl}
              target="_blank"
              rel="noopener noreferrer"
              className="hidden sm:block"
            >
              <Button className="gap-2 glow-sm">
                访问官网
                <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2"><path strokeLinecap="round" strokeLinejoin="round" d="M10 6H6a2 2 0 00-2 2v10a2 2 0 002 2h10a2 2 0 002-2v-4M14 4h6m0 0v6m0-6L10 14" /></svg>
              </Button>
            </a>
          </div>

          <div className="relative z-10 mt-4 sm:hidden">
            <a href={tool.websiteUrl} target="_blank" rel="noopener noreferrer" className="block">
              <Button className="w-full gap-2 glow-sm">
                访问官网
                <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2"><path strokeLinecap="round" strokeLinejoin="round" d="M10 6H6a2 2 0 00-2 2v10a2 2 0 002 2h10a2 2 0 002-2v-4M14 4h6m0 0v6m0-6L10 14" /></svg>
              </Button>
            </a>
          </div>
        </div>

        <div className="mt-6 space-y-4">
          <Card className="border-border/60 bg-white overflow-hidden shadow-[0_1px_3px_rgba(0,0,0,0.06),0_1px_2px_rgba(0,0,0,0.04)]">
            <CardContent className="p-6">
              <h2 className="mb-4 flex items-center gap-2.5 text-lg font-semibold">
                <div className="flex h-7 w-7 items-center justify-center rounded-lg bg-primary/10">
                  <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" className="text-primary">
                    <path strokeLinecap="round" strokeLinejoin="round" d="M13 16h-1v-4h-1m1-4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z" />
                  </svg>
                </div>
                简介
              </h2>
              <p className="whitespace-pre-wrap leading-relaxed text-muted-foreground/80 text-[15px]">
                {tool.description || "暂无简介"}
              </p>
            </CardContent>
          </Card>

          {features.length > 0 && (
            <Card className="border-border/60 bg-white overflow-hidden shadow-[0_1px_3px_rgba(0,0,0,0.06),0_1px_2px_rgba(0,0,0,0.04)]">
              <CardContent className="p-6">
                <h2 className="mb-4 flex items-center gap-2.5 text-lg font-semibold">
                  <div className="flex h-7 w-7 items-center justify-center rounded-lg bg-emerald-100">
                    <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" className="text-emerald-600">
                      <path strokeLinecap="round" strokeLinejoin="round" d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z" />
                    </svg>
                  </div>
                  功能特性
                </h2>
                <ul className="grid gap-2.5 sm:grid-cols-2">
                  {features.map((f: string, i: number) => (
                    <li
                      key={i}
                      className="group flex items-center gap-3 rounded-xl border border-border/40 bg-white px-4 py-3 text-sm text-muted-foreground transition-all duration-200 hover:bg-white hover:border-border/60 hover:shadow-sm"
                    >
                      <div className="flex h-5 w-5 shrink-0 items-center justify-center rounded-full bg-emerald-100 transition-colors group-hover:bg-emerald-200">
                        <svg width="10" height="10" viewBox="0 0 24 24" fill="none" className="text-emerald-600">
                          <path strokeLinecap="round" strokeLinejoin="round" d="M5 13l4 4L19 7" stroke="currentColor" strokeWidth="3" />
                        </svg>
                      </div>
                      {f}
                    </li>
                  ))}
                </ul>
              </CardContent>
            </Card>
          )}

          {tags.length > 0 && (
            <Card className="border-border/60 bg-white overflow-hidden shadow-[0_1px_3px_rgba(0,0,0,0.06),0_1px_2px_rgba(0,0,0,0.04)]">
              <CardContent className="p-6">
                <h2 className="mb-4 flex items-center gap-2.5 text-lg font-semibold">
                  <div className="flex h-7 w-7 items-center justify-center rounded-lg bg-purple-100">
                    <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" className="text-purple-600">
                      <path strokeLinecap="round" strokeLinejoin="round" d="M7 7h.01M7 3h5c.512 0 1.024.195 1.414.586l7 7a2 2 0 010 2.828l-7 7a2 2 0 01-2.828 0l-7-7A1.994 1.994 0 013 12V7a4 4 0 014-4z" />
                    </svg>
                  </div>
                  标签
                </h2>
                <div className="flex flex-wrap gap-2">
                  {tags.map((t: string, i: number) => (
                    <span
                      key={i}
                      className={`rounded-lg border px-3 py-1.5 text-xs font-medium transition-all duration-200 hover:scale-105 ${tagColors[i % tagColors.length]}`}
                    >
                      {t}
                    </span>
                  ))}
                </div>
              </CardContent>
            </Card>
          )}
        </div>

        <div className="mt-6">
          <Card className="border-border/60 bg-white overflow-hidden shadow-[0_1px_3px_rgba(0,0,0,0.06),0_1px_2px_rgba(0,0,0,0.04)]">
            <CardContent className="p-6">
              <ReviewSection type="tool" targetId={tool.id} showRating={true} />
            </CardContent>
          </Card>
        </div>

        <div className="mt-8 flex items-center justify-between rounded-xl border border-border/50 bg-white px-5 py-3.5 text-xs text-muted-foreground/70 shadow-[0_1px_2px_rgba(0,0,0,0.04)]">
          <span className="flex items-center gap-1.5">
            <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2"><path strokeLinecap="round" strokeLinejoin="round" d="M8 7V3m8 4V3m-9 8h10M5 21h14a2 2 0 002-2V7a2 2 0 00-2-2H5a2 2 0 00-2 2v12a2 2 0 002 2z" /></svg>
            收录时间: {new Date(tool.createdAt).toLocaleDateString("zh-CN")}
          </span>
          {tool.updatedAt !== tool.createdAt && (
            <span className="flex items-center gap-1.5">
              <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2"><path strokeLinecap="round" strokeLinejoin="round" d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15" /></svg>
              更新时间: {new Date(tool.updatedAt).toLocaleDateString("zh-CN")}
            </span>
          )}
        </div>
      </div>
    </div>
  );
}