/**
 * Base component, contains some utils
 */
import { PureComponent } from 'react';
import { findNodeHandle, UIManager, Platform } from 'react-native';

/**
 * @ignore
 */
export default class Component<P extends { [key: string]: any }> extends PureComponent<P> {
    props: P;

    /**
     * Must be defined in subclass if need to call native component method
     */
    nativeComponent: string;

    /**
     * Call native method
     */
    call(name: string, params?: any[]) {
        const handle = findNodeHandle(this);
        if (handle) {
            const command = UIManager.getViewManagerConfig(this.nativeComponent).Commands[name];
            UIManager.dispatchViewManagerCommand(handle, command, params);
        }
    }

    /**
     * Generate event handlers
     */
    handlers = (events: string[]) =>
        events.reduce((handlers: { [key: string]: any }, name) => {
            const handler = this.props[name];
            if (handler) {
                if (Platform.OS === 'android') {
                    name = name.replace(/^on/, 'onAMap');
                }
                handlers[name] = (event: { nativeEvent: any }) => handler(event.nativeEvent);
            }
            return handlers;
        }, {});
}