/**
 * @license
 * Copyright 2016-2019 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 { Command, flags } from '@oclif/command';
import * as SDK from 'balena-sdk';
import { stripIndent } from 'common-tags';
import * as _ from 'lodash';

import * as cf from '../../utils/common-flags';
import { CommandHelp } from '../../utils/oclif-utils';

interface FlagsDef {
	discontinued: boolean;
	help: void;
	json?: boolean;
	verbose?: boolean;
}

interface DeviceTypeWithAliases extends SDK.DeviceType {
	aliases?: string[];
}

export default class DevicesSupportedCmd extends Command {
	public static description = stripIndent`
		List the supported device types (like 'raspberrypi3' or 'intel-nuc').

		List the supported device types (like 'raspberrypi3' or 'intel-nuc').

		The --verbose option adds extra columns/fields to the output, including the
		"STATE" column whose values are one of 'beta', 'release' or 'discontinued'.
		However, 'discontinued' device types are only listed if the '--discontinued'
		option is used.

		The --json option is recommended when scripting the output of this command
		(perhaps in combination with the [jq
		utility](https://stedolan.github.io/jq/manual/)), as it is more parser
		friendly (e.g. the ALIASES column contains a list of zero or more values)
		and also more "stable" in relation to added or reordered columns in tabular
		output (which is intended for "human eyes").
`;
	public static examples = [
		'$ balena devices supported',
		'$ balena devices supported --verbose',
		'$ balena devices supported -vj',
	];

	public static usage = (
		'devices supported ' +
		new CommandHelp({ args: DevicesSupportedCmd.args }).defaultUsage()
	).trim();

	public static flags: flags.Input<FlagsDef> = {
		discontinued: flags.boolean({
			description: 'include "discontinued" device types',
		}),
		help: cf.help,
		json: flags.boolean({
			char: 'j',
			description: 'produce JSON output instead of tabular output',
		}),
		verbose: flags.boolean({
			char: 'v',
			description:
				'add extra columns in the tabular output (ALIASES, ARCH, STATE)',
		}),
	};

	public async run() {
		const { flags: options } = this.parse<FlagsDef, {}>(DevicesSupportedCmd);
		const sdk = SDK.fromSharedOptions();
		let deviceTypes: Array<
			Partial<DeviceTypeWithAliases>
		> = await sdk.models.config.getDeviceTypes();
		if (!options.discontinued) {
			deviceTypes = deviceTypes.filter(dt => dt.state !== 'DISCONTINUED');
		}
		const fields = ['slug', 'name'];
		if (options.verbose) {
			fields.splice(1, 0, 'aliases', 'arch', 'state');
			deviceTypes = deviceTypes.map(d => {
				if (d.aliases && d.aliases.length) {
					d.aliases = d.aliases.filter((alias: string) => alias !== d.slug);
					if (!options.json) {
						// stringify the aliases array with commas and spaces
						d.aliases = [d.aliases.join(', ')];
					}
				} else {
					d.aliases = [];
				}
				return d;
			});
		}
		deviceTypes = _.sortBy(
			deviceTypes.map(d => _.pick(d, fields) as Partial<DeviceTypeWithAliases>),
			fields,
		);
		if (options.json) {
			console.log(JSON.stringify(deviceTypes, null, 4));
		} else {
			const visuals = await import('resin-cli-visuals');
			const output = await visuals.table.horizontal(deviceTypes, fields);
			console.log(output);
		}
	}
}