/**
 * External dependencies
 */
import { kebabCase } from 'lodash';

/**
 * Internal dependencies
 */
import type { RequestUtils } from './index';

/**
 * Fetch the plugins from API and cache them in memory,
 * since they are unlikely to change during testing.
 *
 * @param {} this           RequestUtils.
 * @param {} [forceRefetch] Force refetch the installed plugins to update the cache.
 */
async function getPluginsMap( this: RequestUtils, forceRefetch = false ) {
	if ( ! forceRefetch && this.pluginsMap ) {
		return this.pluginsMap;
	}

	const plugins = await this.rest( {
		path: '/wp/v2/plugins',
	} );
	this.pluginsMap = {};
	for ( const plugin of plugins ) {
		// Ideally, we should be using sanitize_title() in PHP rather than kebabCase(),
		// but we don't have the exact port of it in JS.
		this.pluginsMap[ kebabCase( plugin.name ) ] = plugin.plugin;
	}
	return this.pluginsMap;
}

/**
 * Activates an installed plugin.
 *
 * @param {this}   this RequestUtils.
 * @param {string} slug Plugin slug.
 */
async function activatePlugin( this: RequestUtils, slug: string ) {
	const pluginsMap = await this.getPluginsMap();
	const plugin = pluginsMap[ slug ];

	if ( ! plugin ) {
		throw new Error( `The plugin "${ slug }" isn't installed` );
	}

	await this.rest( {
		method: 'PUT',
		path: `/wp/v2/plugins/${ plugin }`,
		data: { status: 'active' },
	} );
}

/**
 * Deactivates an active plugin.
 *
 * @param {this}   this RequestUtils.
 * @param {string} slug Plugin slug.
 */
async function deactivatePlugin( this: RequestUtils, slug: string ) {
	const pluginsMap = await this.getPluginsMap();
	const plugin = pluginsMap[ slug ];

	if ( ! plugin ) {
		throw new Error( `The plugin "${ slug }" isn't installed` );
	}

	await this.rest( {
		method: 'PUT',
		path: `/wp/v2/plugins/${ plugin }`,
		data: { status: 'inactive' },
	} );
}

export { getPluginsMap, activatePlugin, deactivatePlugin };