"use client";

import { useState, useEffect } from "react";
import { useRouter } from "next/navigation";
import Link from "next/link";
import { Pencil, Trash2, Pin, Star } from "lucide-react";
import { apiMe, apiDeletePost, apiTogglePin, apiToggleRecommend, type User } from "@/lib/api";

interface PostActionsProps {
  postId: string;
  authorId: number;
  pinned: number;
  recommended: boolean;
}

export default function PostActions({ postId, authorId, pinned, recommended }: PostActionsProps) {
  const router = useRouter();
  const [user, setUser] = useState<User | null>(null);
  const [deleting, setDeleting] = useState(false);
  const [isPinned, setIsPinned] = useState(pinned > 0);
  const [isRecommended, setIsRecommended] = useState(recommended);
  const [acting, setActing] = useState("");

  useEffect(() => {
    apiMe()
      .then((res) => setUser(res.user || null))
      .catch(() => setUser(null));
  }, []);

  // 仅作者本人或管理员可编辑/删除；置顶/推荐仅管理员
  const canManage = user && (user.id === authorId || user.role === "admin");
  const isAdmin = user?.role === "admin";
  if (!canManage) return null;

  const handleDelete = async () => {
    if (!confirm("确定要删除这篇帖子吗？此操作不可恢复。")) return;
    setDeleting(true);
    try {
      const res = await apiDeletePost(postId);
      if (res.message) {
        router.push("/");
      } else {
        alert(res.error || "删除失败");
      }
    } finally {
      setDeleting(false);
    }
  };

  const handlePin = async () => {
    setActing("pin");
    try {
      const res = await apiTogglePin(postId);
      setIsPinned(res.pinned > 0);
      router.refresh();
    } finally {
      setActing("");
    }
  };

  const handleRecommend = async () => {
    setActing("recommend");
    try {
      const res = await apiToggleRecommend(postId);
      setIsRecommended(res.recommended);
      router.refresh();
    } finally {
      setActing("");
    }
  };

  return (
    <div className="flex items-center gap-2 flex-wrap justify-end">
      {isAdmin && (
        <>
          <button
            onClick={handlePin}
            disabled={acting !== ""}
            className="flex items-center gap-1 text-sm px-3 py-1.5 rounded-lg hover:opacity-80 disabled:opacity-50"
            style={{
              background: isPinned ? "var(--primary)" : "var(--bg-secondary)",
              color: isPinned ? "white" : "var(--text)",
            }}
          >
            <Pin size={14} /> {isPinned ? "取消置顶" : "置顶"}
          </button>
          <button
            onClick={handleRecommend}
            disabled={acting !== ""}
            className="flex items-center gap-1 text-sm px-3 py-1.5 rounded-lg hover:opacity-80 disabled:opacity-50"
            style={{
              background: isRecommended ? "#e11d48" : "var(--bg-secondary)",
              color: isRecommended ? "white" : "var(--text)",
            }}
          >
            <Star size={14} /> {isRecommended ? "取消推荐" : "推荐"}
          </button>
        </>
      )}
      <Link
        href={`/post/${postId}/edit`}
        className="flex items-center gap-1 text-sm px-3 py-1.5 rounded-lg hover:opacity-80"
        style={{ background: "var(--bg-secondary)", color: "var(--text)" }}
      >
        <Pencil size={14} /> 编辑
      </Link>
      <button
        onClick={handleDelete}
        disabled={deleting}
        className="flex items-center gap-1 text-sm px-3 py-1.5 rounded-lg text-red-600 hover:bg-red-50 disabled:opacity-50"
        style={{ background: "var(--bg-secondary)" }}
      >
        <Trash2 size={14} /> {deleting ? "删除中..." : "删除"}
      </button>
    </div>
  );
}