'use strict';

/*
  Note:
  Validators defined in this file are used by more than one service.
  Validators which are only used by one service
  should be declared in that service's test file.
*/

const Joi = require('joi');
const semverRegex = require('semver-regex')();

const withRegex = (re) => Joi.string().regex(re);

const isSemver = withRegex(semverRegex);

const isVPlusTripleDottedVersion = withRegex(/^v[0-9]+.[0-9]+.[0-9]+$/);

const isVPlusDottedVersionAtLeastOne = withRegex(/^v\d+(\.\d+)?(\.\d+)?$/);

// matches a version number with N 'clauses' e.g: v1.2 or v1.22.7.392 are valid
const isVPlusDottedVersionNClauses = withRegex(/^v\d+(\.\d+)*$/);

// matches a version number with N 'clauses'
// and an optional text suffix
// e.g: -beta, -preview1, -release-candidate etc
const isVPlusDottedVersionNClausesWithOptionalSuffix = withRegex(/^v\d+(\.\d+)*(-.*)?$/);

// Simple regex for test Composer versions rule
// https://getcomposer.org/doc/articles/versions.md
// Examples:
// 7.1
// >=5.6
// >1.0 <2.0
// !=1.0 <1.1 || >=1.2
// 7.1.*
// 7.* || 5.6.*
// This regex not support branches, minimum-stability, ref and any (*)
// https://getcomposer.org/doc/04-schema.md#package-links
// https://getcomposer.org/doc/04-schema.md#minimum-stability
const isComposerVersion = withRegex(/^\s*(>=|>|<|<=|!=|\^|~)?\d+(\.(\*|(\d+(\.(\d+|\*))?)))?((\s*\|\|)?\s*(>=|>|<|<=|!=|\^|~)?\d+(\.(\*|(\d+(\.(\d+|\*))?)))?)*\s*$/);

// Regex for validate php-version.versionReduction()
// >= 7
// >= 7.1
// 5.4, 5.6, 7.2
// 5.4 - 7.1, HHVM
const isPhpVersionReduction = withRegex(/^((>= \d+(\.\d+)?)|(\d+\.\d+(, \d+\.\d+)*)|(\d+\.\d+ \\- \d+\.\d+))(, HHVM)?$/);

const isStarRating = withRegex(/^(?=.{5}$)(\u2605{0,5}[\u00BC\u00BD\u00BE]?\u2606{0,5})$/);

// Required to be > 0, because accepting zero masks many problems.
const isMetric = withRegex(/^[1-9][0-9]*[kMGTPEZY]?$/);

const isMetricOpenIssues = withRegex(/^[1-9][0-9]*[kMGTPEZY]? open$/);

const isMetricOverTimePeriod = withRegex(/^[1-9][0-9]*[kMGTPEZY]?\/(year|month|4 weeks|week|day)$/);

const isIntegerPercentage = withRegex(/^[0-9]+%$/);
const isDecimalPercentage = withRegex(/^[0-9]+\.[0-9]*%$/);
const isPercentage = Joi.alternatives().try(isIntegerPercentage, isDecimalPercentage);

const isFileSize = withRegex(/^[0-9]*[.]?[0-9]+\s(B|kB|MB|GB|TB|PB|EB|ZB|YB)$/);

const isFormattedDate = Joi.alternatives().try(
  Joi.equal('today', 'yesterday'),
  Joi.string().regex(/^last (sun|mon|tues|wednes|thurs|fri|satur)day$/),
  Joi.string().regex(/^(january|february|march|april|may|june|july|august|september|october|november|december)( \d{4})?$/));

module.exports = {
  isSemver,
  isVPlusTripleDottedVersion,
  isVPlusDottedVersionAtLeastOne,
  isVPlusDottedVersionNClauses,
  isVPlusDottedVersionNClausesWithOptionalSuffix,
  isComposerVersion,
  isPhpVersionReduction,
  isStarRating,
  isMetric,
  isMetricOpenIssues,
  isMetricOverTimePeriod,
  isPercentage,
  isIntegerPercentage,
  isDecimalPercentage,
  isFileSize,
  isFormattedDate
};