import { useEffect, useState } from 'react';
import { Resolver, useForm } from 'react-hook-form';
import { useNavigate } from 'react-router-dom';

import { EyeOffIcon, EyeOnIcon, LoaderIcon } from '@shared/icons';
import { ArrowRightCircleIcon } from '@shared/icons/arrowRightCircle';

import { useOnboarding } from '@stores/onboarding';
import { useStronghold } from '@stores/stronghold';

import { useSecureStorage } from '@utils/hooks/useSecureStorage';

type FormValues = {
  password: string;
};

const resolver: Resolver<FormValues> = async (values) => {
  return {
    values: values.password ? values : {},
    errors: !values.password
      ? {
          password: {
            type: 'required',
            message: 'This is required.',
          },
        }
      : {},
  };
};

export function ImportStep2Screen() {
  const navigate = useNavigate();
  const setStep = useOnboarding((state) => state.setStep);
  const pubkey = useOnboarding((state) => state.pubkey);
  const privkey = useStronghold((state) => state.privkey);

  const [passwordInput, setPasswordInput] = useState('password');
  const [loading, setLoading] = useState(false);

  const { save } = useSecureStorage();

  // toggle private key
  const showPassword = () => {
    if (passwordInput === 'password') {
      setPasswordInput('text');
    } else {
      setPasswordInput('password');
    }
  };

  const {
    register,
    setError,
    handleSubmit,
    formState: { errors, isDirty, isValid },
  } = useForm<FormValues>({ resolver });

  const onSubmit = async (data: { [x: string]: string }) => {
    setLoading(true);
    if (data.password.length > 3) {
      // save privkey to secure storage
      await save(pubkey, privkey, data.password);

      // redirect to next step
      navigate('/auth/import/step-3', { replace: true });
    } else {
      setLoading(false);
      setError('password', {
        type: 'custom',
        message: 'Password is required and must be greater than 3, please check again',
      });
    }
  };

  useEffect(() => {
    // save current step, if user close app and reopen it
    setStep('/auth/import/step-2');
  }, []);

  return (
    <div className="mx-auto w-full max-w-md">
      <div className="mb-8 text-center">
        <h1 className="text-xl font-semibold text-white">
          Set password to secure your key
        </h1>
      </div>
      <div className="flex flex-col gap-4">
        <form onSubmit={handleSubmit(onSubmit)} className="flex flex-col gap-3">
          <div className="flex flex-col gap-1">
            <div className="relative">
              <input
                {...register('password', { required: true })}
                type={passwordInput}
                className="relative h-11 w-full rounded-lg bg-white/10 px-3.5 py-1 text-center text-white !outline-none placeholder:text-white/50"
              />
              <button
                type="button"
                onClick={() => showPassword()}
                className="group absolute right-2 top-1/2 -translate-y-1/2 transform rounded p-1 hover:bg-white/10"
              >
                {passwordInput === 'password' ? (
                  <EyeOffIcon className="h-4 w-4 text-white/50 group-hover:text-white" />
                ) : (
                  <EyeOnIcon className="h-4 w-4 text-white/50 group-hover:text-white" />
                )}
              </button>
            </div>
            <p className="text-sm text-white/50">
              Password is use to unlock app and secure your key store in local machine.
              When you move to other clients, you just need to copy your private key as
              nsec or hexstring
            </p>
            <span className="text-sm text-red-400">
              {errors.password && <p>{errors.password.message}</p>}
            </span>
          </div>
          <div className="flex items-center justify-center">
            <button
              type="submit"
              disabled={!isDirty || !isValid}
              className="inline-flex h-11 w-full items-center justify-between gap-2 rounded-lg bg-fuchsia-500 px-6 font-medium leading-none text-white hover:bg-fuchsia-600 focus:outline-none"
            >
              {loading ? (
                <>
                  <span className="w-5" />
                  <span>Creating...</span>
                  <LoaderIcon className="h-5 w-5 animate-spin text-white" />
                </>
              ) : (
                <>
                  <span className="w-5" />
                  <span>Continue</span>
                  <ArrowRightCircleIcon className="h-5 w-5" />
                </>
              )}
            </button>
          </div>
        </form>
      </div>
    </div>
  );
}