"use client";

import { useEffect, useState } from "react";
import Link from "next/link";
import { useRouter } from "next/navigation";
import { Calendar, Crown, MessageSquare, VolumeX } from "lucide-react";
import Modal from "@/components/Modal";
import Avatar from "@/components/Avatar";
import RoleBadge from "@/components/RoleBadge";
import LevelBadge from "@/components/LevelBadge";
import BadgeChip from "@/components/BadgeChip";
import ImageLightbox from "@/components/markdown/ImageLightbox";
import { useAllowMessages } from "@/components/MessagesPolicyProvider";
import { apiGetUserProfile, apiOpenDirectChat, type UserProfile, type User } from "@/lib/api";
import { toast } from "@/lib/toast";

export type ChatUserCardTarget = {
  user: User;
  /** 群内身份（可从成员表查到时携带） */
  roomRole?: "owner" | "admin" | "member";
  muted?: boolean;
};

/**
 * 聊天用户资料卡：头像（可进图箱）+ 基本信息 + 主页/私聊入口。
 * 公开资料拉取失败时降级为消息内已有的基础字段，不阻塞弹层。
 */
export default function ChatUserCard({
  target,
  meId,
  onClose,
}: {
  target: ChatUserCardTarget;
  meId: number;
  onClose: () => void;
}) {
  const router = useRouter();
  const allowMessages = useAllowMessages();
  const [profile, setProfile] = useState<UserProfile | null>(null);
  const [dmBusy, setDmBusy] = useState(false);
  const [avatarOpen, setAvatarOpen] = useState(false);

  const { user } = target;
  const isSelf = user.id === meId;
  const name = user.nickname || user.username;

  useEffect(() => {
    let alive = true;
    setProfile(null);
    apiGetUserProfile(user.id)
      .then((p) => {
        if (alive) setProfile(p);
      })
      .catch(() => {
        // 静默：资料卡仍展示消息携带的基础字段
      });
    return () => {
      alive = false;
    };
  }, [user.id]);

  const startDM = async () => {
    setDmBusy(true);
    try {
      const { room } = await apiOpenDirectChat(user.id);
      onClose();
      router.push(`/chat/${room.id}`);
    } catch (e) {
      toast(e instanceof Error ? e.message : "无法发起私聊");
    } finally {
      setDmBusy(false);
    }
  };

  const sig = (profile?.user.signature || "").trim();
  const canPreviewAvatar = !!user.avatar;
  const stats = profile?.stats;

  return (
    <>
      <Modal
        open
        title="用户资料"
        ariaLabel={`${name} 的资料卡`}
        onClose={onClose}
        maxWidthClass="max-w-sm"
      >
        {/* 头部：头像 + 昵称/角色 */}
        <div className="flex items-center gap-3.5">
          {canPreviewAvatar ? (
            <button
              type="button"
              className="cursor-zoom-in rounded-full outline-none focus-visible:ring-2 focus-visible:ring-[var(--accent)]"
              aria-label="查看头像"
              onClick={() => setAvatarOpen(true)}
            >
              <Avatar name={name} src={user.avatar || undefined} size={64} />
            </button>
          ) : (
            <Avatar name={name} src={user.avatar || undefined} size={64} />
          )}
          <div className="min-w-0 flex-1">
            <div className="flex items-center gap-1.5 flex-wrap">
              <p
                className="text-[16px] font-extrabold tracking-tight truncate"
                style={{ color: "var(--ink)" }}
              >
                {name}
              </p>
              <LevelBadge level={user.level} />
              {(user.badges ?? []).slice(0, 2).map((ub) => (
                <BadgeChip key={ub.id} badge={ub.badge} />
              ))}
              {user.role && user.role !== "user" && (
                <RoleBadge role={user.role} boardIds={user.board_ids} />
              )}
              {profile?.user.banned === true && (
                <span
                  className="inline-flex items-center rounded-full px-2 py-0.5 text-[11px] font-semibold"
                  style={{ background: "var(--danger-soft)", color: "var(--danger)" }}
                >
                  已封禁
                </span>
              )}
            </div>
            <p className="meta text-[12.5px] mt-0.5 truncate">@{user.username}</p>
            {target.roomRole === "owner" && (
              <p
                className="mt-1.5 inline-flex items-center gap-1 text-[11.5px] font-medium"
                style={{ color: "var(--gold)" }}
              >
                <Crown size={12} /> 群主
              </p>
            )}
            {target.roomRole === "admin" && (
              <p
                className="mt-1.5 inline-flex items-center gap-1 text-[11.5px] font-medium"
                style={{ color: "var(--accent)" }}
              >
                <Crown size={12} /> 群管理员
              </p>
            )}
            {target.muted && (
              <p
                className="mt-1.5 inline-flex items-center gap-1 text-[11.5px]"
                style={{ color: "var(--ink-3)" }}
              >
                <VolumeX size={12} /> 禁言中
              </p>
            )}
          </div>
        </div>

        {/* 签名 */}
        {sig && (
          <p
            className="mt-3 text-[13px] leading-relaxed"
            style={{ color: "var(--ink-2)" }}
          >
            {sig}
          </p>
        )}

        {/* 基本信息行 */}
        <div
          className="mt-3.5 pt-3 flex items-center gap-x-3 gap-y-1.5 flex-wrap text-[12.5px]"
          style={{ borderTop: "1px solid var(--line)", color: "var(--ink-2)" }}
        >
          <span>
            <span className="tabular-nums font-semibold" style={{ color: "var(--ink)" }}>
              {stats ? stats.post_count : "–"}
            </span>{" "}
            帖子
          </span>
          <span>
            <span className="tabular-nums font-semibold" style={{ color: "var(--ink)" }}>
              {stats ? stats.comment_count : "–"}
            </span>{" "}
            评论
          </span>
          <span>
            <span className="tabular-nums font-semibold" style={{ color: "var(--ink)" }}>
              {stats ? stats.points : "–"}
            </span>{" "}
            积分
          </span>
          {profile?.user.created_at && (
            <span className="inline-flex items-center gap-1 meta">
              <Calendar size={12} />
              {new Date(profile.user.created_at).toLocaleDateString("zh-CN")} 加入
            </span>
          )}
        </div>

        {/* 操作区 */}
        <div className="mt-4 flex items-center gap-2">
          <Link href={`/u/${user.id}`} className="btn btn-line btn-sm flex-1 justify-center">
            用户主页
          </Link>
          {allowMessages && !isSelf && (
            <button
              type="button"
              onClick={startDM}
              disabled={dmBusy}
              className="btn btn-accent btn-sm flex-1 justify-center gap-1.5"
            >
              <MessageSquare size={14} />
              {dmBusy ? "打开中…" : "发私信"}
            </button>
          )}
        </div>
      </Modal>

      {avatarOpen && canPreviewAvatar && (
        <ImageLightbox
          items={[{ src: user.avatar, alt: `${name} 的头像` }]}
          index={0}
          onClose={() => setAvatarOpen(false)}
          onIndexChange={() => {}}
        />
      )}
    </>
  );
}