"use client";

/** 权限与合规：查看三类角色权限范围、审计日志与越权拒绝事件（可按操作者过滤）。 */

import { useCallback, useEffect, useState } from "react";
import { ShieldCheck } from "lucide-react";

import {
  EmptyState,
  ErrorBanner,
  Loading,
  PageHeading,
} from "@/components/feedback";
import { Button } from "@/components/ui/button";
import {
  Card,
  CardAction,
  CardContent,
  CardHeader,
  CardTitle,
} from "@/components/ui/card";
import { Input } from "@/components/ui/input";
import { UsageGuide } from "@/components/usage-guide";
import { ApiError } from "@/lib/api";
import { adminComplianceApi } from "@/lib/services";

/* eslint-disable @typescript-eslint/no-explicit-any */

export default function AdminCompliancePage() {
  const [scopes, setScopes] = useState<any[]>([]);
  const [auditLogs, setAuditLogs] = useState<any[]>([]);
  const [denials, setDenials] = useState<any[]>([]);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);
  const [actorId, setActorId] = useState("");

  const load = useCallback(async () => {
    setLoading(true);
    setError(null);
    try {
      const [sc, logs, dn] = await Promise.all([
        adminComplianceApi.permissionScopes(),
        adminComplianceApi.auditLogs(actorId || undefined),
        adminComplianceApi.denialEvents(actorId || undefined),
      ]);
      setScopes(Array.isArray(sc) ? sc : []);
      setAuditLogs(Array.isArray(logs) ? logs : []);
      setDenials(Array.isArray(dn) ? dn : []);
    } catch (err) {
      setError(err instanceof ApiError ? err.message : "加载失败");
    } finally {
      setLoading(false);
    }
  }, [actorId]);

  useEffect(() => {
    load();
  }, [load]);

  return (
    <div className="space-y-6">
      <PageHeading
        icon={<ShieldCheck className="size-5" />}
        title="权限与合规"
        description="查看角色权限范围、审计日志与越权拒绝事件。"
      />

      <UsageGuide
        steps={[
          { title: "查看角色权限", detail: "顶部按学生 / 导师 / 管理员列出各自的权限范围。" },
          { title: "按操作者过滤", detail: "在输入框填写操作者标识，点击「查询」缩小范围。" },
          { title: "审阅审计日志", detail: "左侧查看操作审计记录，追溯关键行为。" },
          { title: "排查越权事件", detail: "右侧查看被拒绝的越权访问，及时发现异常。" },
        ]}
        tip="越权拒绝事件是合规风险信号，建议定期结合操作者标识排查。"
      />

      <Card>
        <CardHeader>
          <CardTitle>角色权限范围</CardTitle>
        </CardHeader>
        <CardContent>
          {loading ? (
            <Loading />
          ) : error ? (
            <ErrorBanner message={error} />
          ) : (
            <div className="grid grid-cols-1 gap-3 sm:grid-cols-3">
              {scopes.map((sc: any, i: number) => (
                <div
                  key={sc.role ?? i}
                  className="rounded-lg border border-border p-3"
                >
                  <p className="mb-2 text-sm font-semibold text-primary">
                    {sc.role}
                  </p>
                  <ul className="space-y-1 text-xs text-muted-foreground">
                    {(sc.permissions ?? []).map((p: any, pi: number) => (
                      <li key={pi}>
                        {typeof p === "string" ? (
                          <>· {p}</>
                        ) : (
                          <>
                            ·{" "}
                            <span className="font-medium">{p.resourceType}</span>
                            ：
                            {Array.isArray(p.actions) ? p.actions.join(" / ") : ""}
                          </>
                        )}
                      </li>
                    ))}
                  </ul>
                </div>
              ))}
            </div>
          )}
        </CardContent>
      </Card>

      <Card>
        <CardHeader>
          <CardTitle>审计与越权事件</CardTitle>
          <CardAction>
            <div className="flex items-center gap-2">
              <Input
                className="w-48"
                value={actorId}
                onChange={(e) => setActorId(e.target.value)}
                placeholder="按操作者标识过滤"
              />
              <Button variant="outline" size="sm" onClick={load} disabled={loading}>
                查询
              </Button>
            </div>
          </CardAction>
        </CardHeader>
        <CardContent>
          <div className="grid grid-cols-1 gap-6 lg:grid-cols-2">
            <div>
              <h3 className="mb-2 text-sm font-semibold text-foreground">
                审计日志（{auditLogs.length}）
              </h3>
              {auditLogs.length === 0 ? (
                <EmptyState message="暂无审计日志。" />
              ) : (
                <ul className="space-y-2">
                  {auditLogs.map((log: any, i: number) => (
                    <li
                      key={log.id ?? i}
                      className="rounded-lg border border-border p-3 text-xs text-muted-foreground"
                    >
                      <pre className="scrollbar-thin overflow-auto">
                        {JSON.stringify(log, null, 2)}
                      </pre>
                    </li>
                  ))}
                </ul>
              )}
            </div>

            <div>
              <h3 className="mb-2 text-sm font-semibold text-foreground">
                越权拒绝事件（{denials.length}）
              </h3>
              {denials.length === 0 ? (
                <EmptyState message="暂无越权拒绝事件。" />
              ) : (
                <ul className="space-y-2">
                  {denials.map((d: any, i: number) => (
                    <li
                      key={d.id ?? i}
                      className="rounded-lg border border-destructive/20 bg-destructive/10 p-3 text-xs text-destructive"
                    >
                      <pre className="scrollbar-thin overflow-auto">
                        {JSON.stringify(d, null, 2)}
                      </pre>
                    </li>
                  ))}
                </ul>
              )}
            </div>
          </div>
        </CardContent>
      </Card>
    </div>
  );
}