import { useState, useCallback } from "react";
import { useForm } from "react-hook-form";
import { zodResolver } from "@hookform/resolvers/zod";
import { z } from "zod";
import { toast } from "sonner";

const resetSchema = z.object({
  email: z
    .string()
    .min(1, "이메일을 입력해주세요.")
    .email("올바른 이메일 형식을 입력해주세요."),
});

type ResetForm = z.infer<typeof resetSchema>;

interface Props {
  open: boolean;
  onClose: () => void;
}

export default function ResetPasswordModal({ open, onClose }: Props) {
  const [shakeFields, setShakeFields] = useState<Set<string>>(new Set());

  const {
    register,
    handleSubmit,
    reset,
    formState: { errors },
  } = useForm<ResetForm>({
    resolver: zodResolver(resetSchema),
  });

  const triggerShake = useCallback((fieldNames: string[]) => {
    setShakeFields(new Set(fieldNames));
    setTimeout(() => setShakeFields(new Set()), 400);
  }, []);

  /* 유효성 통과 → 발송 처리 */
  const onSubmit = (_data: ResetForm) => {
    // TODO: API 연동
    reset();
    onClose();
    toast.success("임시 비밀번호가 발송되었습니다.");
  };

  /* 유효성 실패 → shake */
  const onError = (fieldErrors: typeof errors) => {
    triggerShake(Object.keys(fieldErrors));
  };

  /* 닫기 */
  const handleClose = () => {
    reset();
    onClose();
  };

  if (!open) return null;

  return (
    <div
      className="fixed inset-0 z-50 flex items-center justify-center bg-black/60 p-4 backdrop-blur-sm"
      onClick={(e) => {
        if (e.target === e.currentTarget) handleClose();
      }}
    >
      <div className="w-full max-w-md overflow-hidden rounded-xl bg-white shadow-2xl">
        {/* 헤더 */}
        <div className="px-8 pt-8 pb-4">
          <h2 className="mb-2 text-xl font-bold text-foreground">
            비밀번호 재설정
          </h2>
          <p className="text-sm leading-relaxed text-gray-500">
            가입하신 이메일 주소를 입력하시면 임시 비밀번호를 보내드립니다.
          </p>
        </div>

        {/* 폼 */}
        <form
          className="px-8 pb-8"
          onSubmit={handleSubmit(onSubmit, onError)}
          noValidate
        >
          <div className="space-y-6">
            <div className="space-y-1.5">
              <label className="block text-sm font-bold text-gray-700">
                이메일
              </label>
              <input
                type="email"
                autoComplete="email"
                placeholder="user@spms.com"
                className={`w-full rounded border bg-white px-4 py-3 font-sans text-sm text-gray-900 placeholder-gray-400 transition-all focus:border-transparent focus:outline-none focus:ring-2 focus:ring-primary ${
                  errors.email
                    ? "border-red-500 shadow-[0_0_0_2px_rgba(239,68,68,0.15)]"
                    : "border-gray-300"
                } ${shakeFields.has("email") ? "animate-shake" : ""}`}
                {...register("email")}
              />
              {errors.email && (
                <div className="mt-1.5 flex items-center gap-1.5 text-xs text-red-600">
                  <span className="material-symbols-outlined flex-shrink-0"
                    style={{ fontSize: "14px" }}>
                    error
                  </span>
                  <span>{errors.email.message}</span>
                </div>
              )}
            </div>

            {/* 버튼 */}
            <div className="flex gap-3 pt-2">
              <button
                type="button"
                className="flex-1 rounded-lg border border-gray-300 bg-white py-3 px-4 text-sm font-bold text-foreground transition-all hover:bg-gray-50"
                onClick={handleClose}
              >
                취소
              </button>
              <button
                type="submit"
                className="flex-1 rounded-lg bg-primary py-3 px-4 text-sm font-bold text-white shadow-lg shadow-blue-500/20 transition-all hover:bg-[#1d4ed8] active:scale-[0.98]"
              >
                임시 비밀번호 발송
              </button>
            </div>
          </div>
        </form>

        {/* 풋터 */}
        <div className="border-t border-gray-100 bg-gray-50 px-8 py-4 text-center">
          <p className="text-xs text-gray-400">
            도움이 필요하신가요?{" "}
            <button className="font-medium text-primary hover:underline">
              관리자 문의하기
            </button>
          </p>
        </div>
      </div>
    </div>
  );
}