import Component from '@glimmer/component';
import {action} from '@ember/object';
import {inject as service} from '@ember/service';
import {tracked} from '@glimmer/tracking';

const MODE_OPTIONS = [{
    name: 'Cadence',
    value: 'cadence'
}, {
    name: 'Tiers',
    value: 'tiers'
}];

export default class ChartPaidMix extends Component {
    @service dashboardStats;

    /**
     * Call this method when you need to fetch new data from the server. In this component, it will get called
     * when the days parameter changes and on initialisation.
     */
    @action
    loadCharts() {
        // The dashboard stats service will take care or reusing and limiting API-requests between charts
        if (this.mode === 'cadence') {
            this.dashboardStats.loadPaidMembersByCadence();
        } else {
            this.dashboardStats.loadPaidMembersByTier();
        }
    }

    @tracked mode = 'cadence';
    modeOptions = MODE_OPTIONS;

    get selectedModeOption() {
        return this.modeOptions.find(option => option.value === this.mode);
    }

    @action 
    onSwitchMode(selected) {
        this.mode = selected.value;

        if (this.loading) {
            // We don't have the data yet for the newly selected mode
            this.loadCharts();
        }
    }

    get loading() {
        if (this.mode === 'cadence') {
            return this.dashboardStats.paidMembersByCadence === null;
        }
        return this.dashboardStats.paidMembersByTier === null;
    }
    
    get chartType() {
        return 'pie';
    }

    get chartData() {
        if (this.mode === 'cadence') {
            return {
                labels: ['Monthly', 'Annual'],
                datasets: [{
                    data: [this.dashboardStats.paidMembersByCadence.monthly, this.dashboardStats.paidMembersByCadence.annual],
                    fill: false,
                    backgroundColor: ['#14b8ff'],
                    tension: 0.1
                }]
            };
        }

        const labels = this.dashboardStats.paidMembersByTier.map(stat => stat.tier.name);
        const data = this.dashboardStats.paidMembersByTier.map(stat => stat.members);

        return {
            labels,
            datasets: [{
                data,
                fill: false,
                backgroundColor: ['#14b8ff'],
                tension: 0.1
            }]
        };
    }

    get chartOptions() {
        return {
            legend: {
                display: false
            }
        };
    }

    get chartHeight() {
        return 100;
    }
}