/*
 * 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 Dashboard from "../../api/v2/chart/budget/dashboard.js";
// todo optimize
import Chart from 'chart.js/auto';
import {getDefaultChartSettings} from "../../support/default-chart-settings.js";

window.budgetCurrencies = [];
export default () => ({
    loading: false,
    chart: null,
    autoConversion: false,
    chartData: null,
    chartOptions: null,
    loadChart() {
        if (true === this.loading) {
            return;
        }
        this.loading = true;
        if (null === this.chartData) {
            this.getFreshData();
        }
        if (null !== this.chartData) {
            this.generateOptions(this.chartData);
            this.drawChart();
            this.loading = false;
        }
    },
    drawChart() {
        if (null !== this.chart) {
            // chart already in place, refresh:
            console.log('refresh');
            this.chart.data = this.chartOptions.data;
            //this.chart.updateOptions(this.chartOptions);
        }
        if (null === this.chart) {
            //this.chart = new ApexCharts(document.querySelector("#budget-chart"), this.chartOptions);
            this.chart = new Chart(document.querySelector("#budget-chart"), this.chartOptions);
            //this.chart.render();
        }
    },
    getFreshData() {
        const dashboard = new Dashboard();
        dashboard.dashboard(new Date(window.store.get('start')), new Date(window.store.get('end')), null).then((response) => {
            this.chartData = response.data;
            this.generateOptions(this.chartData);
            this.drawChart();
            this.loading = false;
        });
    },
    generateOptions(data) {
        window.budgetCurrencies = [];
        let options = getDefaultChartSettings('column');
        options.options.locale = window.store.get('locale').replace('_', '-');
        options.options.plugins = {
            tooltip: {
                callbacks: {
                    // tooltip: function (context) {
                    //     //console.log(context);
                    // },
                    title: function (context) {
                        return context.label;
                    },
                    label: function (context) {
                        let label = context.dataset.label || '';

                        if (label) {
                            label += ': ';
                        }
                        //console.log('label');
                        //console.log(context.label + ' X');
                        //return context.label + ' X';
                        // console.log(context);
                        return label + ' ' + context.parsed.x;
                        // return label + ' ' + formatMoney(context.parsed.y, window.budgetCurrencies[context.parsed.x] ?? 'EUR');
                    }
                }
            }
        };

        options.data = {
            labels: [],
            datasets: [
                {
                    label: 'TODO spent',
                    data: [],
                    borderWidth: 1,
                    stack: 1
                },
                {
                    label: 'TODO left',
                    data: [],
                    borderWidth: 1,
                    stack: 1
                },
                {
                    label: 'TODO overspent',
                    data: [],
                    borderWidth: 1,
                    stack: 1
                }
            ]
        };
        for (const i in data) {
            if (data.hasOwnProperty(i)) {
                let current = data[i];
                //         // convert to EUR yes no?
                let label = current.label + ' (' + current.currency_code + ')';
                options.data.labels.push(label);
                if (this.autoConversion) {
                    window.budgetCurrencies.push(current.native_code);
                    // series 0: spent
                    options.data.datasets[0].data.push(parseFloat(current.native_entries.spent) * -1);
                    // series 1: left
                    options.data.datasets[1].data.push(parseFloat(current.native_entries.left));
                    // series 2: overspent
                    options.data.datasets[2].data.push(parseFloat(current.native_entries.overspent));
                }
                if (!this.autoConversion) {
                    window.budgetCurrencies.push(current.currency_code);
                    // series 0: spent
                    options.data.datasets[0].data.push(parseFloat(current.entries.spent) * -1);
                    // series 1: left
                    options.data.datasets[1].data.push(parseFloat(current.entries.left));
                    // series 2: overspent
                    options.data.datasets[2].data.push(parseFloat(current.entries.overspent));
                }
                // console.log('Currencies');
                // console.log(window.budgetCurrencies);
                //
            }
        }

        // options = {
        //     legend: {show: false},
        //     series: [{
        //         name: 'Spent',
        //         data: []
        //     }, {
        //         name: 'Left',
        //         data: []
        //     }, {
        //         name: 'Overspent',
        //         data: []
        //     }],
        //     chart: {
        //         type: 'bar',
        //         height: 400,
        //         stacked: true,
        //         toolbar: {tools: {zoom: false, download: false, pan: false}},
        //         zoom: {
        //             enabled: true
        //         }
        //     },
        //     responsive: [{
        //         breakpoint: 480,
        //         options: {
        //             legend: {
        //                 position: 'bottom',
        //                 offsetX: -10,
        //                 offsetY: 0
        //             }
        //         }
        //     }],
        //     plotOptions: {
        //         bar: {
        //             horizontal: false,
        //             borderRadius: 10,
        //             dataLabels: {
        //                 total: {
        //                     enabled: true,
        //                     // style: {
        //                     //     fontSize: '13px',
        //                     //     fontWeight: 900
        //                     // },
        //                     formatter: function (val, opt) {
        //                         let index = 0;
        //                         if (typeof opt === 'object') {
        //                             index = opt.dataPointIndex; // this is the "category name + currency" index
        //                         }
        //                         let currencyCode = window.budgetCurrencies[index] ?? 'EUR';
        //                         return formatMoney(val, currencyCode);
        //                     }
        //                 }
        //             }
        //         },
        //     },
        //     yaxis: {
        //         labels: {
        //             formatter: function (value, index) {
        //                 if (undefined === value) {
        //                     return value;
        //                 }
        //                 if (undefined === index) {
        //                     return value;
        //                 }
        //                 if (typeof index === 'object') {
        //                     index = index.dataPointIndex; // this is the "category name + currency" index
        //                 }
        //                 let currencyCode = window.budgetCurrencies[index] ?? 'EUR';
        //                 return formatMoney(value, currencyCode);
        //             }
        //         }
        //     },
        //     xaxis: {
        //         categories: []
        //     },
        //     fill: {
        //         opacity: 0.8
        //     },
        //     dataLabels: {
        //         formatter: function (val, opt) {
        //             let index = 0;
        //             if (typeof opt === 'object') {
        //                 index = opt.dataPointIndex; // this is the "category name + currency" index
        //             }
        //             let currencyCode = window.budgetCurrencies[index] ?? 'EUR';
        //             return formatMoney(val, currencyCode);
        //         },
        //     }
        // };


        // for (const i in data) {
        //     if (data.hasOwnProperty(i)) {
        //         let current = data[i];
        //         // convert to EUR yes no?
        //         let label = current.label + ' (' + current.currency_code + ')';
        //         options.xaxis.categories.push(label);
        //         if (this.autoConversion) {
        //             window.budgetCurrencies.push(current.native_code);
        //
        //             // series 0: spent
        //             options.series[0].data.push(parseFloat(current.native_entries.spent) * -1);
        //             // series 1: left
        //             options.series[1].data.push(parseFloat(current.native_entries.left));
        //             // series 2: overspent
        //             options.series[2].data.push(parseFloat(current.native_entries.overspent));
        //         }
        //         if (!this.autoConversion) {
        //             window.budgetCurrencies.push(current.currency_code);
        //             // series 0: spent
        //             options.series[0].data.push(parseFloat(current.entries.spent) * -1);
        //             // series 1: left
        //             options.series[1].data.push(parseFloat(current.entries.left));
        //             // series 2: overspent
        //             options.series[2].data.push(parseFloat(current.entries.overspent));
        //         }
        //
        //     }
        // }
        this.chartOptions = options;
    },


    init() {
        Promise.all([getVariable('autoConversion', false),]).then((values) => {
            this.autoConversion = values[0];
            this.loadChart();
        });
        // todo the charts don't need to reload from server if the autoConversion value changes.
        window.store.observe('end', () => {
            this.chartData = null;
            this.loadChart();
        });
        window.store.observe('autoConversion', (newValue) => {
            this.autoConversion = newValue;
            this.loadChart();
        });
    },

});