// Copyright 2017-2018 AJ Jordan, AGPLv3+

'use strict';

const alexaLabels = ['top-100', 'top-1k', 'top-10k', 'top-100k', 'top-1m'];

const typeLabels = ['bug', 'enhancement', 'ruleset-bug', 'new-ruleset'];

const typeToLabel = {

'code issue': 'bug',

'feature request': 'enhancement',

'ruleset issue': 'ruleset-bug',

'new ruleset': 'new-ruleset'

};

module.exports = function label(context, data, alexa) {

const alexaPosition = alexa.data.indexOf(data.domain);

const labels = [];

if (alexaPosition === -1) {

// Do nothing, we still need to label the type

} else if (alexaPosition < 100) {

labels.push('top-100');

} else if (alexaPosition < 1000) {

labels.push('top-1k');

} else if (alexaPosition < 10000) {

labels.push('top-10k');

} else if (alexaPosition < 100000) {

labels.push('top-100k');

} else if (alexaPosition < 1000000) {

labels.push('top-1m');

}

const typeLabel = typeToLabel[data.type] || null;

if (typeLabel) {

labels.push(typeLabel);

}

// Every Alexa label *except* our new one, and the same for type labels

const toRemove = alexaLabels.filter(label => label !== labels[0] || '')

.concat(typeLabels.filter(label => label !== typeLabel)); // eslint-disable-line indent

toRemove.forEach(label => {

const removalParams = context.issue({name: label});

// This is racy with addLabels() but honestly who cares

context.github.issues.removeLabel(removalParams).catch(err => {

// GitHub returns 404 if the label doesn't exist on the issue, so we just swallow those errors

// XXX should we query labels and do a diff?

if (err.code === 404) return;

throw err;

});

});

const params = context.issue({labels});

return context.github.issues.addLabels(params);

};