import Ember from 'ember';

import _ from 'lodash/lodash';

export default Ember.Component.extend({

    colors: Ember.inject.service(),

    filter: Ember.inject.service(),

    tagName: 'li',

    classNameBindings: ['isDisabled:disabled', 'isDark:light-color', 'isHighlighted:highlighted'],

    attributeBindings: ['style', 'title', 'id'],

    isDisabled: Ember.computed('range', 'year', 'count', function() {

        let year = parseInt(this.get('year'));

        let count = this.get('count');

        return (!_.inRange(year, this.get('range')[0], this.get('range')[1]+1)) || count === 0;

    }),

    isHighlighted: Ember.computed('filter.dateList.[]', function() {

        return _.contains(this.get('filter.dateList'), this.get('year'));

    }),

    isDark: Ember.computed('backgroundColor', 'isDisabled', function() {

        let backgroundColor = this.get('backgroundColor');

        if(this.get('isDisabled')) {

            return false;

        }

        return this.get('colors').getPerceptiveLuminance(backgroundColor) >= 0.5;

    }),

    backgroundColor: Ember.computed('count', 'maxCount', 'minCount', function() {

        return this.get('colors').shadeLinear(this.get('count'), this.get('minCount'), this.get('maxCount'));

    }),

    style: Ember.computed('backgroundColor', 'isDisabled', 'isHighlighted', function() {

        let backgroundColor = this.get('backgroundColor');

        if(this.get('isDisabled') || this.get('isHighlighted')) {

          return null;

        }

        return Ember.String.htmlSafe(`background-color: ${backgroundColor};`);

    }),

    id: Ember.computed.alias('year'),

    count: Ember.computed('datestats.[]', function() {

        let year = this.get('year');

        let count = this.get('datestats').get(`${year}`);

        return count?count:0;

    }),

    title: Ember.computed('count', 'isDsabled', function() {

        if(this.get('isDisabled')) {

            return null;

        }

        let year = this.get('year');

        let count = this.get('count');

        return `${year} (${count})`;

    }),

    year: null,

    datestats: null,

    range: null,

    maxCount: null,

    minCount: null,

});