import type { PasskeyInfo } from "@umt/contracts";
import { Check, KeyRound, LoaderCircle, Pencil, Plus, Trash2, X } from "lucide-react";
import { useState } from "react";
import { toast } from "sonner";
import {
  isPasskeyCancel,
  passkeySupported,
  useDeletePasskey,
  usePasskeys,
  useRegisterPasskey,
  useRenamePasskey,
} from "~/api/auth.ts";
import { ConfirmDialog } from "~/components/console/confirm-dialog.tsx";
import { useListPagination } from "~/components/console/use-list-pagination.ts";
import { Button } from "~/components/ui/button.tsx";
import { Input } from "~/components/ui/input.tsx";
import { Pagination } from "~/components/ui/pagination.tsx";
import { errorMessage } from "~/lib/api.ts";
import { formatDateTime } from "~/lib/utils.ts";
import { SettingsBlock } from "./settings-block.tsx";

// Passkey:登记(可以多把,各自命名)、改名、删除。登录页有 Passkey 时显示"用 Passkey 登录"。

/** 按浏览器平台给个默认名,方便区分 */
function defaultName(): string {
  const ua = typeof navigator === "undefined" ? "" : navigator.userAgent;
  if (/iPhone|iPad/.test(ua)) return "iPhone / iPad";
  if (/Mac OS X/.test(ua)) return "Mac";
  if (/Android/.test(ua)) return "Android";
  if (/Windows/.test(ua)) return "Windows";
  return "Passkey";
}

function PasskeyRow({ item }: { item: PasskeyInfo }) {
  const rename = useRenamePasskey();
  const del = useDeletePasskey();
  const [editing, setEditing] = useState(false);
  const [name, setName] = useState(item.name);

  const save = async (e: React.FormEvent) => {
    e.preventDefault();
    const v = name.trim();
    if (!v || v === item.name) return setEditing(false);
    try {
      await rename.mutateAsync({ id: item.id, name: v });
      setEditing(false);
    } catch (err) {
      toast.error(errorMessage(err));
    }
  };

  return (
    <li className="flex min-h-12 items-center gap-3 py-2">
      <KeyRound className="size-4 shrink-0 text-muted-foreground" />
      {editing ? (
        <form onSubmit={save} className="flex min-w-0 flex-1 items-center gap-1.5">
          <Input
            aria-label="Passkey 名称"
            value={name}
            maxLength={60}
            autoFocus
            onChange={(e) => setName(e.target.value)}
            className="h-8 max-w-64"
          />
          <Button type="submit" size="icon-sm" variant="ghost" aria-label="保存名称" disabled={rename.isPending}>
            {rename.isPending ? <LoaderCircle className="animate-spin" /> : <Check />}
          </Button>
          <Button
            type="button"
            size="icon-sm"
            variant="ghost"
            aria-label="取消改名"
            onClick={() => {
              setName(item.name);
              setEditing(false);
            }}
          >
            <X />
          </Button>
        </form>
      ) : (
        <div className="min-w-0 flex-1">
          <p className="truncate text-caption font-medium">{item.name}</p>
          <p className="text-meta text-muted-foreground">
            {formatDateTime(item.createdAt)} 登记 ·{" "}
            {item.lastUsedAt ? `${formatDateTime(item.lastUsedAt)} 用过` : "还没用过"}
            {item.backedUp ? " · 已同步到云端钥匙串" : ""}
          </p>
        </div>
      )}
      {editing ? null : (
        <div className="flex shrink-0 gap-1">
          <Button size="icon-sm" variant="ghost" aria-label={`重命名 ${item.name}`} onClick={() => setEditing(true)}>
            <Pencil />
          </Button>
          <ConfirmDialog
            trigger={
              <Button size="icon-sm" variant="ghost" aria-label={`删除 ${item.name}`}>
                <Trash2 />
              </Button>
            }
            title={`删除 Passkey「${item.name}」？`}
            description="删除后这把钥匙不能再登录控制台；设备上的钥匙要在系统设置里另外删。"
            confirmLabel="删除 Passkey"
            destructive
            onConfirm={async () => {
              try {
                await del.mutateAsync(item.id);
                toast.success("Passkey 已删除");
              } catch (err) {
                toast.error(errorMessage(err));
                throw err;
              }
            }}
          />
        </div>
      )}
    </li>
  );
}

export function PasskeyBlock({ disabled }: { disabled: boolean }) {
  const list = usePasskeys(!disabled);
  const register = useRegisterPasskey();
  const [adding, setAdding] = useState(false);
  const [name, setName] = useState("");
  const supported = passkeySupported();
  const items = list.data?.items ?? [];
  const paged = useListPagination(items, { resetKey: String(disabled) });

  const add = async (e: React.FormEvent) => {
    e.preventDefault();
    try {
      const r = await register.mutateAsync(name.trim() || defaultName());
      toast.success(`已登记「${r.name}」`);
      setAdding(false);
      setName("");
    } catch (err) {
      if (isPasskeyCancel(err)) return;
      toast.error(errorMessage(err, "登记失败"));
    }
  };

  let body: React.ReactNode;
  if (disabled) body = <p className="text-caption text-muted-foreground">当前用 API Key 访问，登录会话才能修改。</p>;
  else
    body = (
      <div className="grid gap-3">
        {list.isPending ? (
          <p className="text-caption text-muted-foreground">读取中…</p>
        ) : items.length ? (
          <ul className="divide-y divide-border/60">
            {paged.items?.map((p) => (
              <PasskeyRow key={p.id} item={p} />
            ))}
          </ul>
        ) : (
          <p className="text-caption text-muted-foreground">还没有登记 Passkey。</p>
        )}
        {items.length > 0 ? <Pagination {...paged.pagination} /> : null}
        {!supported ? (
          <p className="text-meta text-muted-foreground">这个浏览器用不了 Passkey：需要 HTTPS 或 localhost 访问。</p>
        ) : adding ? (
          <form onSubmit={add} className="flex max-w-md flex-wrap items-center gap-2">
            <Input
              aria-label="新 Passkey 的名称"
              placeholder={defaultName()}
              value={name}
              maxLength={60}
              autoFocus
              onChange={(e) => setName(e.target.value)}
              className="min-w-0 flex-1"
            />
            <Button type="submit" size="sm" disabled={register.isPending}>
              {register.isPending ? <LoaderCircle className="animate-spin" /> : null}
              继续
            </Button>
            <Button
              type="button"
              size="sm"
              variant="ghost"
              onClick={() => setAdding(false)}
              disabled={register.isPending}
            >
              取消
            </Button>
          </form>
        ) : (
          <div>
            <Button size="sm" variant="outline" onClick={() => setAdding(true)}>
              <Plus />
              添加 Passkey
            </Button>
          </div>
        )}
      </div>
    );

  return (
    <SettingsBlock
      section="account"
      anchor="passkeys"
      title="通行密钥（Passkey）"
      description="用指纹、面容或安全钥匙直接登录，不用输密码和验证码。可以登记多把。"
    >
      {body}
    </SettingsBlock>
  );
}