"use client";

import { CircleAlertIcon, Trash2Icon, UserPlusIcon } from "lucide-react";
import { useRouter } from "next/navigation";
import { useActionState, useEffect, useRef, useTransition } from "react";
import { toast } from "sonner";

import {
  createAccount,
  removeAccount,
  type CreateAccountState,
} from "@/app/admin/register/actions";
import { DeleteConfirmationDialog } from "@/components/admin/delete-confirmation-dialog";
import {
  Alert,
  AlertDescription,
  AlertTitle,
} from "@/components/ui/alert";
import { Button } from "@/components/ui/button";
import {
  Card,
  CardContent,
  CardDescription,
  CardFooter,
  CardHeader,
  CardTitle,
} from "@/components/ui/card";
import {
  Field,
  FieldDescription,
  FieldGroup,
  FieldLabel,
} from "@/components/ui/field";
import { Input } from "@/components/ui/input";
import { Spinner } from "@/components/ui/spinner";

const initialCreateAccountState: CreateAccountState = {
  status: "idle",
  message: "",
};

export function RegisterCard({
  accounts,
  currentUserId,
}: {
  accounts: Array<{ id: string; name: string; email: string; createdAt: Date }>;
  currentUserId: string;
}) {
  const router = useRouter();
  const formRef = useRef<HTMLFormElement>(null);
  const [state, formAction, pending] = useActionState(
    createAccount,
    initialCreateAccountState,
  );
  const [removing, startRemoval] = useTransition();

  useEffect(() => {
    if (state.status !== "success") return;
    formRef.current?.reset();
    router.refresh();
  }, [router, state]);

  function remove(userId: string) {
    startRemoval(async () => {
      const result = await removeAccount(userId);
      if (result.status === "error") toast.error(result.message);
      else {
        toast.success("ลบบัญชีแล้ว");
        router.refresh();
      }
    });
  }

  return (
    <div className="grid gap-6 lg:grid-cols-[minmax(0,28rem)_minmax(0,1fr)]">
      <Card>
        <CardHeader>
          <CardTitle>สร้างบัญชี</CardTitle>
          <CardDescription>
            เพิ่มบัญชีผู้ดูแลที่สามารถเข้าสู่ระบบและจัดการเนื้อหาได้
          </CardDescription>
        </CardHeader>
        <CardContent>
          <form ref={formRef} action={formAction}>
          <FieldGroup>
            <Field>
              <FieldLabel htmlFor="register-name">ชื่อ</FieldLabel>
              <Input
                id="register-name"
                name="name"
                autoComplete="name"
                disabled={pending}
                required
              />
            </Field>
            <Field>
              <FieldLabel htmlFor="register-email">อีเมล</FieldLabel>
              <Input
                id="register-email"
                name="email"
                type="email"
                autoComplete="username"
                autoCapitalize="none"
                spellCheck={false}
                disabled={pending}
                required
              />
            </Field>
            <Field>
              <FieldLabel htmlFor="register-password">รหัสผ่าน</FieldLabel>
              <Input
                id="register-password"
                name="password"
                type="password"
                autoComplete="new-password"
                minLength={12}
                maxLength={128}
                disabled={pending}
                required
              />
              <FieldDescription>อย่างน้อย 12 ตัวอักษร</FieldDescription>
            </Field>
            <Field>
              <FieldLabel htmlFor="register-password-confirmation">
                ยืนยันรหัสผ่าน
              </FieldLabel>
              <Input
                id="register-password-confirmation"
                name="passwordConfirmation"
                type="password"
                autoComplete="new-password"
                minLength={12}
                maxLength={128}
                disabled={pending}
                required
              />
            </Field>
            {state.message ? (
              <Alert variant={state.status === "error" ? "destructive" : "default"}>
                <CircleAlertIcon aria-hidden="true" />
                <AlertTitle>
                  {state.status === "error" ? "สร้างบัญชีไม่สำเร็จ" : "สร้างบัญชีแล้ว"}
                </AlertTitle>
                <AlertDescription>{state.message}</AlertDescription>
              </Alert>
            ) : null}
            <Button className="w-full" size="lg" type="submit" disabled={pending}>
              {pending ? (
                <Spinner data-icon="inline-start" />
              ) : (
                <UserPlusIcon data-icon="inline-start" aria-hidden="true" />
              )}
              {pending ? "กำลังสร้างบัญชี…" : "สร้างบัญชี"}
            </Button>
          </FieldGroup>
          </form>
        </CardContent>
      </Card>

      <Card>
        <CardHeader>
          <CardTitle>บัญชีในระบบ</CardTitle>
          <CardDescription>{accounts.length} บัญชี</CardDescription>
        </CardHeader>
        <CardContent className="flex flex-col gap-3">
          {accounts.map((account) => {
            const isCurrent = account.id === currentUserId;
            return (
              <div key={account.id} className="flex items-center gap-3 rounded-lg border p-3">
                <div className="min-w-0 flex-1">
                  <p className="truncate font-medium">{account.name}</p>
                  <p className="truncate text-sm text-muted-foreground">{account.email}</p>
                </div>
                {isCurrent ? (
                  <span className="text-sm text-muted-foreground">บัญชีปัจจุบัน</span>
                ) : (
                  <DeleteConfirmationDialog
                    trigger={<Button variant="ghost" size="icon-sm" disabled={removing} />}
                    title={`ลบบัญชี ${account.name}?`}
                    description="ผู้ใช้นี้จะออกจากระบบและไม่สามารถเข้าสู่ระบบได้อีก การดำเนินการนี้ย้อนกลับไม่ได้"
                    confirmLabel="ลบบัญชี"
                    onConfirm={() => remove(account.id)}
                  >
                    <Trash2Icon />
                    <span className="sr-only">ลบบัญชี {account.name}</span>
                  </DeleteConfirmationDialog>
                )}
              </div>
            );
          })}
        </CardContent>
        <CardFooter>
          <p className="text-sm text-muted-foreground">
            บัญชีทุกบัญชีมีสิทธิ์ผู้ดูแลระบบ
          </p>
        </CardFooter>
      </Card>
    </div>
  );
}