/*
 * budgets.js
 * Copyright (c) 2023 james@firefly-iii.org
 *
 * This file is part of Firefly III (https://github.com/firefly-iii).
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
import {getVariable} from "../../store/get-variable.js";
import Get from "../../api/v2/model/subscription/get.js";
import {getDefaultChartSettings} from "../../support/default-chart-settings.js";
import {format} from "date-fns";
import {Chart} from 'chart.js';
import {I18n} from "i18n-js";
import {loadTranslations} from "../../support/load-translations.js";

//const CACHE_KEY = 'dashboard-subscriptions-data';
const SUBSCRIPTION_CACHE_KEY = 'dashboard-subscriptions-data';
// let chart = null;
// let chartData = null;
let afterPromises = false;
let i18n; // for translating items in the chart.
let apiData = [];

/**
 *
 */
function downloadSubscriptions(params) {
    console.log('Downloading page ' + params.page + '...');
    const getter = new Get();

    getter.get(params).then((response) => {
        let data = response.data;
        let totalPages = parseInt(data.meta.pagination.total_pages);
        apiData = [...apiData, ...data.data];
        if (totalPages > params.page) {
            params.page++;
            downloadSubscriptions(params);
        }
        console.log('Done! ' + apiData.length + ' items downloaded.');
    });
}


export default () => ({
    loading: false,
    autoConversion: false,
    startSubscriptions() {
        console.log('here we are');
        const cacheValid = window.store.get('cacheValid');
        let cachedData = window.store.get(SUBSCRIPTION_CACHE_KEY);

        if (cacheValid && typeof cachedData !== 'undefined' && false) {
            console.error('cannot handle yet');
            return;
        }

        let params = {
            start: format(new Date(window.store.get('start')), 'y-MM-dd'),
            end: format(new Date(window.store.get('end')), 'y-MM-dd'),
            page: 1
        };
        downloadSubscriptions(params);
    },

    // loadChart() {
    //     if (true === this.loading) {
    //         return;
    //     }
    //     this.loading = true;
    //
    //     if (null !== chartData) {
    //         //this.drawChart(this.generateOptions(chartData));
    //         //this.loading = false;
    //
    //     }
    //     //this.getFreshData();
    // },
    // drawChart(options) {
    //     if (null !== chart) {
    //         // chart.data.datasets = options.data.datasets;
    //         // chart.update();
    //
    //     }
    //     // chart = new Chart(document.querySelector("#subscriptions-chart"), options);
    // },
    // getFreshData() {
    //     const cacheValid = window.store.get('cacheValid');
    //     let cachedData = window.store.get(CACHE_KEY);
    //
    //     if (cacheValid && typeof cachedData !== 'undefined') {
    //         this.drawChart(this.generateOptions(cachedData));
    //         this.loading = false;
    //         return;
    //     }
    //
    //
    //     const getter = new Get();
    //     let params = {
    //         start: format(new Date(window.store.get('start')), 'y-MM-dd'),
    //         end: format(new Date(window.store.get('end')), 'y-MM-dd')
    //     };
    //
    //     getter.paid(params).then((response) => {
    //         let paidData = response.data;
    //         getter.unpaid(params).then((response) => {
    //             let unpaidData = response.data;
    //             let chartData = {paid: paidData, unpaid: unpaidData};
    //             window.store.set(CACHE_KEY, chartData);
    //             this.drawChart(this.generateOptions(chartData));
    //             this.loading = false;
    //         });
    //     });
    // },
    // generateOptions(data) {
    //     let options = getDefaultChartSettings('pie');
    //     // console.log(data);
    //     options.data.labels = [i18n.t('firefly.paid'), i18n.t('firefly.unpaid')];
    //     options.data.datasets = [];
    //     let collection = {};
    //     for (let i in data.paid) {
    //         if (data.paid.hasOwnProperty(i)) {
    //             let current = data.paid[i];
    //             let currencyCode = this.autoConversion ? current.native_code : current.currency_code;
    //             let amount = this.autoConversion ? current.native_sum : current.sum;
    //             if (!collection.hasOwnProperty(currencyCode)) {
    //                 collection[currencyCode] = {
    //                     paid: 0,
    //                     unpaid: 0,
    //                 };
    //             }
    //             // in case of paid, add to "paid":
    //             collection[currencyCode].paid += (parseFloat(amount) * -1);
    //         }
    //     }
    //     // unpaid
    //     for (let i in data.unpaid) {
    //         if (data.unpaid.hasOwnProperty(i)) {
    //             let current = data.unpaid[i];
    //             let currencyCode = this.autoConversion ? current.native_code : current.currency_code;
    //             let amount = this.autoConversion ? current.native_sum : current.sum;
    //             if (!collection.hasOwnProperty(currencyCode)) {
    //                 collection[currencyCode] = {
    //                     paid: 0,
    //                     unpaid: 0,
    //                 };
    //             }
    //             // console.log(current);
    //             // in case of paid, add to "paid":
    //             collection[currencyCode].unpaid += parseFloat(amount);
    //         }
    //     }
    //     for (let currencyCode in collection) {
    //         if (collection.hasOwnProperty(currencyCode)) {
    //             let current = collection[currencyCode];
    //             options.data.datasets.push(
    //                 {
    //                     label: currencyCode,
    //                     data: [current.paid, current.unpaid],
    //                     backgroundColor: [
    //                         'rgb(54, 162, 235)', // green (paid)
    //                         'rgb(255, 99, 132)', // red (unpaid_
    //                     ],
    //                     //hoverOffset: 4
    //                 }
    //             )
    //         }
    //     }
    //
    //     return options;
    // },


    init() {
        // console.log('subscriptions init');
        Promise.all([getVariable('autoConversion', false), getVariable('language', 'en-US')]).then((values) => {
            // console.log('subscriptions after promises');
            this.autoConversion = values[0];
            afterPromises = true;

            i18n = new I18n();
            i18n.locale = values[1];
            loadTranslations(i18n, values[1]).then(() => {
                if (false === this.loading) {
                    this.startSubscriptions();
                }
            });


        });
        window.store.observe('end', () => {
            if (!afterPromises) {
                return;
            }
            // console.log('subscriptions observe end');
            if (false === this.loading) {
                this.startSubscriptions();
            }
        });
        window.store.observe('autoConversion', (newValue) => {
            if (!afterPromises) {
                return;
            }
            // console.log('subscriptions observe autoConversion');
            this.autoConversion = newValue;
            if (false === this.loading) {
                this.startSubscriptions();
            }
        });
    },

});