import type { ExternalIdentity, IdentityRevision } from "@umt/contracts";
import { ExternalLink, Lock, LockOpen } from "lucide-react";
import { Link } from "react-router";
import { toast } from "sonner";
import { useIdentityRevisions, useUpdateIdentity } from "~/api/identity.ts";
import { DetailSection, DetailSheet } from "~/components/console/detail-sheet.tsx";
import { EmptyState, ErrorState, LoadingState } from "~/components/console/empty-state.tsx";
import { JsonView } from "~/components/console/json-view.tsx";
import { KvList } from "~/components/console/kv-list.tsx";
import { consolePath } from "~/components/console/nav.ts";
import { Timeline } from "~/components/console/timeline.tsx";
import { Button } from "~/components/ui/button.tsx";
import { errorMessage } from "~/lib/api.ts";
import { formatDateTime } from "~/lib/utils.ts";
import { EVIDENCE_LEVEL, IDENTITY_STATUS, VERIFY_STATUS } from "./labels.ts";
import { Tone } from "./parts.tsx";

const ACTION: Record<IdentityRevision["action"], string> = {
  created: "创建",
  status_changed: "状态变更",
  relinked: "重新关联",
  evidence_updated: "证据更新",
  locked: "加人工锁",
  unlocked: "解除人工锁",
};
const ACTOR: Record<string, string> = { user: "用户", agent: "Agent", system: "系统", api_key: "API Key" };

export const identityRef = (i: Pick<ExternalIdentity, "provider" | "entityType" | "externalId">) =>
  `${i.provider}:${i.entityType}:${i.externalId}`;

function Revisions({ id }: { id: string }) {
  const q = useIdentityRevisions(id);
  if (q.isPending) return <LoadingState rows={2} />;
  if (q.isError) return <ErrorState plain error={q.error} onRetry={() => q.refetch()} />;
  if (q.data.length === 0) return <EmptyState plain title="没有修订记录" className="py-6" />;
  const items = [...q.data].sort((a, b) => b.revision - a.revision);
  return (
    <Timeline
      items={items.map((r) => ({
        id: r.id,
        at: r.createdAt,
        tone: r.toStatus ? IDENTITY_STATUS[r.toStatus].tone : "neutral",
        title: `r${r.revision} · ${ACTION[r.action]}${
          r.fromStatus || r.toStatus
            ? `:${r.fromStatus ? IDENTITY_STATUS[r.fromStatus].label : "无"} → ${r.toStatus ? IDENTITY_STATUS[r.toStatus].label : "无"}`
            : ""
        }`,
        meta: `${ACTOR[r.actorType] ?? r.actorType}${r.actorId ? ` ${r.actorId}` : ""}`,
        description: r.reason ?? undefined,
        children: (
          <div className="grid gap-2 sm:grid-cols-2">
            <JsonView label="修订前" value={r.before} defaultOpen={false} maxHeight="12rem" />
            <JsonView label="修订后" value={r.after} defaultOpen={false} maxHeight="12rem" />
          </div>
        ),
      }))}
    />
  );
}

export function ExternalIdentitySheet({ item, onClose }: { item: ExternalIdentity | null; onClose: () => void }) {
  const update = useUpdateIdentity();
  if (!item) return null;
  const toggleLock = async () => {
    try {
      await update.mutateAsync({
        id: item.id,
        expectedRevision: item.revision,
        locked: !item.locked,
        reason: item.locked ? "控制台解除人工锁" : "控制台加人工锁",
      });
      toast.success(item.locked ? "已解除人工锁" : "已加人工锁");
      onClose();
    } catch (err) {
      toast.error(errorMessage(err));
    }
  };
  const target = item.mediaEntityId;
  return (
    <DetailSheet
      open
      width="lg"
      onOpenChange={(o) => !o && onClose()}
      title={identityRef(item)}
      footer={
        <Button variant="outline" onClick={toggleLock} disabled={update.isPending || item.status === "retired"}>
          {item.locked ? <LockOpen /> : <Lock />}
          {item.locked ? "解除人工锁" : "加人工锁"}
        </Button>
      }
    >
      <KvList
        items={[
          { label: "状态", value: <Tone v={IDENTITY_STATUS[item.status]} /> },
          { label: "证据等级", value: EVIDENCE_LEVEL[item.evidenceLevel] ?? item.evidenceLevel },
          { label: "人工锁", value: item.locked ? "已锁定" : "未锁定" },
          { label: "外部校验", value: <Tone v={VERIFY_STATUS[item.verifyStatus]} /> },
          { label: "校验时间", value: formatDateTime(item.verifiedAt) },
          { label: "修订号", value: `r${item.revision}` },
          {
            label: "关联",
            value: target ? (
              <Link
                to={consolePath("library", target)}
                className="inline-flex items-center gap-1 underline-offset-4 hover:underline"
              >
                查看作品
                <ExternalLink className="h-3 w-3" />
              </Link>
            ) : (
              `内容单元 ${item.contentUnitId ?? "—"}`
            ),
          },
          { label: "有效期", value: item.validUntil ? `至 ${formatDateTime(item.validUntil)}` : "长期" },
        ]}
      />
      <JsonView label="证据" value={Object.keys(item.evidence).length ? item.evidence : null} />
      <DetailSection title="修订历史">
        <Revisions id={item.id} />
      </DetailSection>
    </DetailSheet>
  );
}