/* @flow */
import * as React from 'react';
import { connect } from 'react-redux';

import type { State } from 'flowtype';

import { IntlProvider, addLocaleData } from 'react-intl';

import en from 'react-intl/locale-data/en';
import cs from 'react-intl/locale-data/cs';
import bn from 'react-intl/locale-data/bn';
import de from 'react-intl/locale-data/de';
import el from 'react-intl/locale-data/el';
import es from 'react-intl/locale-data/es';
import fr from 'react-intl/locale-data/fr';
import id from 'react-intl/locale-data/id';
import it from 'react-intl/locale-data/it';
import ja from 'react-intl/locale-data/ja';
import nl from 'react-intl/locale-data/nl';
import pl from 'react-intl/locale-data/pl';
import pt from 'react-intl/locale-data/pt';
import ru from 'react-intl/locale-data/ru';
import uk from 'react-intl/locale-data/uk';
import zh from 'react-intl/locale-data/zh';

addLocaleData([
    ...en,
    ...cs,
    ...bn,
    ...de,
    ...el,
    ...es,
    ...fr,
    ...id,
    ...it,
    ...ja,
    ...nl,
    ...pl,
    ...pt,
    ...ru,
    ...uk,
    ...zh,
]);

type OwnProps = {|
    children: React.Node,
|};

type StateProps = {|
    locale: string,
    messages: { [string]: string },
|};

type Props = {|
    ...OwnProps,
    ...StateProps,
|};

export type MessageDescriptor = {
    // A unique, stable identifier for the message
    id: string,
    // The default message (probably in English)
    defaultMessage: string,
    // Context for the translator about how it's used in the UI
    description?: string,
    values?: { [key: string]: any },
};

export type Messages = {
    [key: string]: MessageDescriptor,
};

const mapStateToProps = (state: State): StateProps => ({
    locale: state.wallet.language,
    messages: state.wallet.messages,
});

const ReactIntlProvider = ({ children, locale, messages }: Props) => (
    <IntlProvider
        locale={locale}
        messages={messages}
        key={locale} // forces rerender IntlProvider when lang file is downloaded
    >
        {children}
    </IntlProvider>
);

export default connect<Props, OwnProps, StateProps, _, State, _>(mapStateToProps)(
    ReactIntlProvider
);