/**
 * @license
 * Copyright 2016-2020 Balena Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { flags } from '@oclif/command';
import type { IArg } from '@oclif/parser/lib/args';
import { stripIndent } from 'common-tags';
import Command from '../../command';
import { ExpectedError } from '../../errors';
import * as cf from '../../utils/common-flags';
import { getBalenaSdk } from '../../utils/lazy';
import { tryAsInteger } from '../../utils/validation';

interface FlagsDef {
	enable: boolean;
	disable: boolean;
	status: boolean;
	help?: void;
}

interface ArgsDef {
	uuid: string;
	// Optional hidden arg to support old command format
	legacyUuid?: string;
}

export default class DevicePublicUrlCmd extends Command {
	public static description = stripIndent`
		Get or manage the public URL for a device.

		This command will output the current public URL for the
		specified device.  It can also enable or disable the URL,
		or output the enabled status, using the respective options.

		The old command style 'balena device public-url enable <uuid>'
		is deprecated, but still supported.
	`;

	public static examples = [
		'$ balena device public-url 23c73a1',
		'$ balena device public-url 23c73a1 --enable',
		'$ balena device public-url 23c73a1 --disable',
		'$ balena device public-url 23c73a1 --status',
	];

	public static args: Array<IArg<any>> = [
		{
			name: 'uuid',
			description: 'the uuid of the device to manage',
			parse: (dev) => tryAsInteger(dev),
			required: true,
		},
		{
			// Optional hidden arg to support old command format
			name: 'legacyUuid',
			parse: (dev) => tryAsInteger(dev),
			hidden: true,
		},
	];

	public static usage = 'device public-url <uuid>';

	public static flags: flags.Input<FlagsDef> = {
		enable: flags.boolean({
			description: 'enable the public URL',
			exclusive: ['disable', 'status'],
		}),
		disable: flags.boolean({
			description: 'disable the public URL',
			exclusive: ['enable', 'status'],
		}),
		status: flags.boolean({
			description: 'determine if public URL is enabled',
			exclusive: ['enable', 'disable'],
		}),
		help: cf.help,
	};

	public static authenticated = true;

	public async run() {
		const { args: params, flags: options } = this.parse<FlagsDef, ArgsDef>(
			DevicePublicUrlCmd,
		);

		// Legacy command format support.
		// Previously this command used the following format
		// (changed due to oclif technicalities):
		//   `balena device public-url enable|disable|status <uuid>`
		if (params.legacyUuid) {
			const action = params.uuid;
			if (!['enable', 'disable', 'status'].includes(action)) {
				throw new ExpectedError(
					`Unexpected arguments: ${params.uuid} ${params.legacyUuid}`,
				);
			}

			options.enable = action === 'enable';
			options.disable = action === 'disable';
			options.status = action === 'status';
			params.uuid = params.legacyUuid;
			delete params.legacyUuid;
		}

		const balena = getBalenaSdk();

		if (options.enable) {
			// Enable public URL
			await balena.models.device.enableDeviceUrl(params.uuid);
		} else if (options.disable) {
			// Disable public URL
			await balena.models.device.disableDeviceUrl(params.uuid);
		} else if (options.status) {
			// Output bool indicating if public URL enabled
			const hasUrl = await balena.models.device.hasDeviceUrl(params.uuid);
			console.log(hasUrl);
		} else {
			// Output public URL
			try {
				const url = await balena.models.device.getDeviceUrl(params.uuid);
				console.log(url);
			} catch (e) {
				if (e.message.includes('Device is not web accessible')) {
					throw new ExpectedError(stripIndent`
					Public URL is not enabled for this device.

					To enable, use:
						balena device public-url ${params.uuid} --enable
					`);
				} else {
					throw e;
				}
			}
		}
	}
}