/*
Copyright 2016-2018 Balena

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 { BalenaSDK } from 'balena-sdk';
import _ = require('lodash');
import { ExpectedError } from '../errors';

export function normalizeUuidProp(
	params: { [key: string]: any },
	propName = 'uuid',
) {
	if (typeof params[propName] === 'number') {
		params[propName] =
			params[propName + '_raw'] || _.toString(params[propName]);
	}
}

/**
 * Takes a string which may represent one of:
 * 	- Integer release id
 *  - String uuid, 7, 32, or 62 char
 *  - String commit hash, 40 char, with short hashes being 7+ chars (more as needed to avoid collisions)
 * and returns the correctly typed value (integer|string).
 * @param balena balena sdk
 * @param release string representation of release reference (id/hash)
 */
export async function disambiguateReleaseParam(
	balena: BalenaSDK,
	release: string,
) {
	// Reject empty values or invalid characters
	const mixedCaseHex = /^[a-fA-F0-9]+$/;
	if (!release || !mixedCaseHex.test(release)) {
		throw new ExpectedError('Invalid release parameter');
	}

	// Accepting short hashes of 7,8,9 chars.
	const possibleUuidHashLength = [7, 8, 9, 32, 40, 62].includes(release.length);
	const hasLeadingZero = release[0] === '0';
	const isOnlyNumerical = /^[0-9]+$/.test(release);

	// Reject non-numerical values with invalid uuid/hash lengths
	if (!isOnlyNumerical && !possibleUuidHashLength) {
		throw new ExpectedError('Invalid release parameter');
	}

	// Reject leading-zero values with invalid uuid/hash lengths
	if (hasLeadingZero && !possibleUuidHashLength) {
		throw new ExpectedError('Invalid release parameter');
	}

	// If alphanumeric, or has leading zero must now be uuid/hash.
	if (!isOnlyNumerical || hasLeadingZero) {
		return release;
	}

	// Now very likely an integer id (but still could be number only uuid/hash)
	// Check integer id with API
	try {
		return (
			await balena.models.release.get(parseInt(release, 10), {
				$select: 'id',
			})
		).id;
	} catch (e) {
		if (e.name !== 'BalenaReleaseNotFound') {
			throw e;
		}
	}

	// Must be a number only uuid/hash (or nonexistent release)
	return (await balena.models.release.get(release, { $select: 'id' })).id;
}