import React, { useEffect } from 'react';
import { Keyboard, Text, View, Alert } from 'react-native';
import { useDispatch } from 'react-redux';
import { RouteProp, useNavigation, useRoute } from '@react-navigation/native';
import { StackNavigationProp } from '@react-navigation/stack';
import * as yup from 'yup';
import { yupResolver } from '@hookform/resolvers/yup';
import { useForm } from 'react-hook-form';

import { loginRequest } from '../../actions/login';
import Button from '../../containers/Button';
import { ControlledFormTextInput } from '../../containers/TextInput';
import I18n from '../../i18n';
import { OutsideParamList } from '../../stacks/types';
import { useTheme } from '../../theme';
import sharedStyles from '../Styles';
import UGCRules from '../../containers/UserGeneratedContentRules';
import { useAppSelector } from '../../lib/hooks';
import styles from './styles';
import { handleLoginErrors } from './handleLoginErrors';

interface ISubmit {
	user: string;
	password: string;
}

const schema = yup.object().shape({
	user: yup.string().required(),
	password: yup.string().required()
});

const UserForm = () => {
	const { colors } = useTheme();
	const dispatch = useDispatch();
	const navigation = useNavigation<StackNavigationProp<OutsideParamList, 'LoginView'>>();

	const {
		params: { username }
	} = useRoute<RouteProp<OutsideParamList, 'LoginView'>>();

	const {
		control,
		handleSubmit,
		formState: { isValid },
		getValues,
		setFocus
	} = useForm<ISubmit>({ mode: 'onChange', resolver: yupResolver(schema), defaultValues: { user: username || '' } });

	const {
		Accounts_EmailOrUsernamePlaceholder,
		Accounts_PasswordPlaceholder,
		Accounts_PasswordReset,
		Accounts_RegistrationForm_LinkReplacementText,
		isFetching,
		Accounts_RegistrationForm,
		Site_Name,
		inviteLinkToken,
		error,
		failure
	} = useAppSelector(state => ({
		Accounts_RegistrationForm: state.settings.Accounts_RegistrationForm as string,
		Accounts_RegistrationForm_LinkReplacementText: state.settings.Accounts_RegistrationForm_LinkReplacementText as string,
		isFetching: state.login.isFetching,
		Accounts_EmailOrUsernamePlaceholder: state.settings.Accounts_EmailOrUsernamePlaceholder as string,
		Accounts_PasswordPlaceholder: state.settings.Accounts_PasswordPlaceholder as string,
		Accounts_PasswordReset: state.settings.Accounts_PasswordReset as boolean,
		Site_Name: state.settings.Site_Name as string,
		inviteLinkToken: state.inviteLinks.token,
		failure: state.login.failure,
		error: state.login.error && state.login.error.data
	}));

	useEffect(() => {
		if (failure) {
			if (error?.error === 'error-invalid-email') {
				const user = getValues('user');
				navigation.navigate('SendEmailConfirmationView', { user });
			} else {
				Alert.alert(I18n.t('Oops'), handleLoginErrors(error?.error));
			}
		}
	}, [error?.error, failure, getValues, navigation]);

	const showRegistrationButton =
		Accounts_RegistrationForm === 'Public' || (Accounts_RegistrationForm === 'Secret URL' && inviteLinkToken?.length);

	const register = () => {
		navigation.navigate('RegisterView', { title: Site_Name });
	};

	const forgotPassword = () => {
		navigation.navigate('ForgotPasswordView', { title: Site_Name });
	};

	const submit = ({ password, user }: ISubmit) => {
		if (!isValid) {
			return;
		}
		Keyboard.dismiss();
		dispatch(loginRequest({ user, password }));
	};

	return (
		<>
			<Text style={[styles.title, sharedStyles.textBold, { color: colors.titleText }]}>{I18n.t('Login')}</Text>
			<ControlledFormTextInput
				name='user'
				control={control}
				label={I18n.t('Username_or_email')}
				containerStyle={styles.inputContainer}
				placeholder={Accounts_EmailOrUsernamePlaceholder || I18n.t('Username_or_email')}
				keyboardType='email-address'
				returnKeyType='next'
				onSubmitEditing={() => setFocus('password')}
				testID='login-view-email'
				textContentType='username'
				autoComplete='username'
			/>
			<ControlledFormTextInput
				name='password'
				control={control}
				label={I18n.t('Password')}
				containerStyle={styles.inputContainer}
				placeholder={Accounts_PasswordPlaceholder || I18n.t('Password')}
				returnKeyType='send'
				secureTextEntry
				onSubmitEditing={handleSubmit(submit)}
				testID='login-view-password'
				textContentType='password'
				autoComplete='password'
			/>
			<Button
				title={I18n.t('Login')}
				type='primary'
				onPress={handleSubmit(submit)}
				testID='login-view-submit'
				loading={isFetching}
				disabled={!isValid}
				style={styles.loginButton}
			/>
			{Accounts_PasswordReset ? (
				<Button
					title={I18n.t('Forgot_password')}
					type='secondary'
					onPress={forgotPassword}
					testID='login-view-forgot-password'
					color={colors.auxiliaryText}
					fontSize={14}
				/>
			) : null}
			{showRegistrationButton ? (
				<View style={styles.bottomContainer}>
					<Text style={[styles.bottomContainerText, { color: colors.auxiliaryText }]}>{I18n.t('Dont_Have_An_Account')}</Text>
					<Text
						style={[styles.bottomContainerTextBold, { color: colors.actionTintColor }]}
						onPress={register}
						testID='login-view-register'
					>
						{I18n.t('Create_account')}
					</Text>
				</View>
			) : (
				<Text style={[styles.registerDisabled, { color: colors.auxiliaryText }]}>
					{Accounts_RegistrationForm_LinkReplacementText}
				</Text>
			)}
			<UGCRules styleContainer={styles.ugcContainer} />
		</>
	);
};

export default UserForm;