import { useCallback, useEffect, useState } from 'react';
import { Button } from '@/components/ui/button';
import { Input } from '@/components/ui/input';
import { 
  Card,
  CardContent,
  CardHeader,
  CardFooter
} from '@/components/ui/card';
import { Field, FieldError, FieldGroup, FieldLabel } from '@/components/ui/field';
import { SignUpSchema } from '@/data/form';
import { Controller, useForm } from 'react-hook-form';
import * as z from 'zod';
import { zodResolver } from '@hookform/resolvers/zod';
import EmailVerificationModal from '@/ui/component/modal/EmailVerificationModal';
import { CheckDuplicationRequest, SignupRequest } from '@/data/request';
import { AccountNetwork } from '@/network/AccountNetwork';
import { toast } from 'sonner';
import { useNavigate } from 'react-router-dom';
import { PageRouting } from '@/const/PageRouting';

export default function SignUpPage() {
  const [emailVerificationModalOpen, setEmailVerificationModalOpen] = useState<boolean>(false);
  const [isCheckedEmailDuplication, setIsCheckedEmailDuplication] = useState<boolean>(false);
  const [isCheckedAccountIdDuplication, setIsCheckedAccountIdDuplication] = useState<boolean>(false);
  const [duplicationCheckedEmail, setDuplicationCheckedEmail] = useState<string>("");
  const [duplicationCheckedAccountId, setDuplicationCheckedAccountId] = useState<string>("");

  const accountNetwork = new AccountNetwork();
  const navigate = useNavigate();

  const signUpForm = useForm<z.infer<typeof SignUpSchema>>({
    resolver: zodResolver(SignUpSchema),
    defaultValues: {
      accountId: "",
      email: "",
      password: "",
      passwordConfirm: "",
      name: "",
      nickname: "",
    }
  });

  const goToLogin = useCallback(() => {
    navigate(PageRouting["LOGIN"].path);
  }, [navigate]);

  const checkDuplication = async (type: 'email' | 'accountId', value: string) => {
    const data: CheckDuplicationRequest = new CheckDuplicationRequest(type, value);
    return await accountNetwork.checkDuplication(data);
  }

  const signup = async () => {
    const { email, accountId, name, nickname, password } = signUpForm.getValues();
    const data: SignupRequest = new SignupRequest(accountId, email, name, nickname, password);

    const signupPromise = accountNetwork.signup(data);

    toast.promise(
      signupPromise,
      {
        loading: "회원가입 진행 중입니다.",
        success: (res) => {
          if (!res.data.success) return "회원가입에 실패하였습니다.\n잠시 후 다시 시도해주십시오.";
          
          return <SuccessToast onClose={goToLogin} />
        },
        error: "회원가입에 실패하였습니다.\n잠시 후 다시 시도해주십시오.",
      }
    );
  }

  const handleOnChangeAccountId = (e: React.ChangeEvent<HTMLInputElement>) => {
    setIsCheckedAccountIdDuplication(
      e.currentTarget.value === duplicationCheckedAccountId
    );
  }

  const handleOnChangeEmail = (e: React.ChangeEvent<HTMLInputElement>) => {
    setIsCheckedEmailDuplication(
      e.currentTarget.value === duplicationCheckedEmail
    );
  }

  const handleDuplicationCheckButtonClick = async (type: 'email' | 'accountId') => {
    const value = signUpForm.getValues(type);
    const duplicatedMessage = type === 'email' ? '사용할 수 없는 이메일입니다.' : '사용할 수 없는 아이디입니다.';

    if (!value) return;

    const isDuplicated = (await checkDuplication(type, value)).data.isDuplicated;

    if (isDuplicated) {
      signUpForm.setError(type, { message: duplicatedMessage });
    } else {
      signUpForm.clearErrors(type);
      if (type === 'email') {
        setIsCheckedEmailDuplication(true);
        setDuplicationCheckedEmail(value);
      } else {
        setIsCheckedAccountIdDuplication(true);
        setDuplicationCheckedAccountId(value);
      }
    }
  }

  const handleOnSignUpButtonClick = () => {
    if (!isCheckedAccountIdDuplication) {
      signUpForm.setError("accountId", { message: "아이디 중복 확인이 필요합니다."});
      return;
    }

    if (!isCheckedEmailDuplication) {
      signUpForm.setError("email", { message: "이메일 중복 확인이 필요합니다." });
      return;
    }

    setEmailVerificationModalOpen(true);
  }

  return (
    <div className="w-full h-full flex flex-col justify-center items-center">
      <Card className="w-md pl-2 pr-2">
        <CardHeader>회원가입</CardHeader>
        <CardContent>
          <form id="form-signup">
            <FieldGroup>
              <Controller
                name="accountId"
                control={signUpForm.control}
                render={({ field, fieldState  }) => (
                  <Field data-invalid={fieldState.invalid}>
                    <FieldLabel htmlFor="form-signup-account-id">아이디</FieldLabel>
                    <div id="accountId-group" className="w-full flex flex-row justify-between gap-2.5">
                      <Input
                        {...field}
                        id="form-signup-account-id"
                        aria-invalid={fieldState.invalid}
                        onInput={handleOnChangeAccountId}
                      />
                      <Button
                        type="button"
                        onClick={() => handleDuplicationCheckButtonClick('accountId')}
                        className="bg-indigo-500 hover:bg-indigo-400"
                      >
                        중복 확인
                      </Button>
                    </div>
                    { isCheckedAccountIdDuplication && <p className="text-green-500 text-sm font-normal">사용할 수 있는 아이디입니다</p> }
                    <FieldError errors={[fieldState.error]}/>
                  </Field>
                )} 
              />
              <Controller
                name="name"
                control={signUpForm.control}
                render={({ field, fieldState }) => (
                  <Field data-invalid={fieldState.invalid}>
                    <FieldLabel htmlFor="form-signup-name">이름</FieldLabel>
                    <Input
                      {...field}
                      id="form-signup-name"
                      aria-invalid={fieldState.invalid}
                    />
                    <FieldError errors={[fieldState.error]} />
                  </Field>
                )}
              />
              <Controller
                name="nickname"
                control={signUpForm.control}
                render={({ field, fieldState }) => (
                  <Field data-invalid={fieldState.invalid}>
                    <FieldLabel htmlFor="form-signup-nickname">닉네임</FieldLabel>
                    <Input
                      {...field}
                      id="form-signup-nickname"
                      aria-invalid={fieldState.invalid}
                    />
                    <FieldError errors={[fieldState.error]} />
                  </Field>
                )}
              />
              <Controller
                name="email"
                control={signUpForm.control}
                render={({ field, fieldState  }) => (
                  <Field data-invalid={fieldState.invalid}>
                    <FieldLabel htmlFor="form-signup-email">이메일</FieldLabel>
                    <div id="email-group" className="w-full flex flex-row justify-between gap-2.5">
                      <Input
                        {...field}
                        id="form-signup-email"
                        aria-invalid={fieldState.invalid}
                        placeholder="example@domain.com"
                        type="email"
                        onInput={handleOnChangeEmail}
                      />
                      <Button
                        type="button"
                        onClick={() => handleDuplicationCheckButtonClick('email')}
                        className="bg-indigo-500 hover:bg-indigo-400"
                      >
                        중복 확인
                      </Button>
                    </div>
                    { isCheckedEmailDuplication && <p className="text-green-500 text-sm font-normal">사용할 수 있는 이메일입니다</p> }
                    <FieldError errors={[fieldState.error]}/>
                  </Field>
                )} 
              />
              <Controller
                name="password"
                control={signUpForm.control}
                render={({ field, fieldState }) => (
                  <Field data-invalid={fieldState.invalid}>
                    <FieldLabel htmlFor="form-signup-password">비밀번호</FieldLabel>
                    <Input
                      {...field}
                      id="form-signup-password"
                      aria-invalid={fieldState.invalid}
                      type="password"
                    />
                    <FieldError errors={[fieldState.error]} />
                  </Field>
                )}
              />
              <Controller
                name="passwordConfirm"
                control={signUpForm.control}
                render={({ field, fieldState }) => (
                  <Field data-invalid={fieldState.invalid}>
                    <FieldLabel htmlFor="form-signup-password-confirm">비밀번호 확인</FieldLabel>
                    <Input
                      {...field}
                      id="form-signup-password-confirm"
                      aria-invalid={fieldState.invalid}
                      type="password"
                    />
                    <FieldError errors={[fieldState.error]} />
                  </Field>
                )}
              />
            </FieldGroup>
          </form>
        </CardContent>
        <CardFooter>
          <EmailVerificationModal 
            trigger={
              <Button type="button" onClick={handleOnSignUpButtonClick} className="0">
                회원가입
              </Button>
            }
            email={duplicationCheckedEmail}
            open={emailVerificationModalOpen}          // ✅ 부모 상태 연결
            setOpen={setEmailVerificationModalOpen}    // ✅ 부모 상태 변경 함수 전달
            onVerifySuccess={signup}                   // ✅ 인증 성공 시 signup 호출
          />
        </CardFooter>
      </Card>
    </div>
  );
}

function SuccessToast({ onClose }: { onClose: () => void }) {
  useEffect(() => {
    const timer = setTimeout(() => onClose(), 3000); // 3초 후 이동
    return () => clearTimeout(timer);
  }, [onClose]);

  return (
    <div className="w-full flex flex-row justify-between items-center">
      회원가입 성공!
      <button onClick={onClose}>로그인 페이지로 이동</button>
    </div>
  );
}