@page "/charts/bar"

<DemoBlock Title="Bar 图" Introduction="通过设置 <code>ChartType</code> 更改图表为 <code>bar</code> 图" Name="BarType">
    <Chart ChartType="ChartType.Bar" OnInitAsync="() => OnInit(false)" OnAfterInitAsync="@OnAfterInit" OnAfterUpdateAsync="@OnAfterUpdate" @ref="BarChart" />
    <div class="text-center mt-2 chart">
        <div class="btn-group">
            <button class="btn btn-info" data-method="play" @onclick="@OnPlayChart">
                <i class="fa fa-play-circle"></i>
                <span>开启动画</span>
            </button>
            <button class="btn btn-info" data-method="stop" @onclick="@OnStopChart">
                <i class="fa fa-stop-circle"></i>
                <span>关闭动画</span>
            </button>
        </div>
    </div>
    <div class="text-center mt-2 chart">
        <div class="btn-group">
            <button class="btn btn-primary" @onclick="e => Utility.RandomData(BarChart)"><i class="fa fa-bar-chart"></i><span>随机数据</span></button>
            <button class="btn btn-primary" @onclick="e => Utility.AddDataSet(BarChart, ref BarDatasetCount)"><i class="fa fa-plus-circle"></i><span>添加数据集</span></button>
            <button class="btn btn-primary" @onclick="e => Utility.RemoveDataSet(BarChart, ref BarDatasetCount)"><i class="fa fa-minus-circle"></i><span>移除数据集</span></button>
            <button class="btn btn-primary" @onclick="e => Utility.AddData(BarChart, ref BarDataCount)"><i class="fa fa-plus"></i><span>添加数据</span></button>
            <button class="btn btn-primary" @onclick="e => Utility.RemoveData(BarChart, ref BarDataCount)"><i class="fa fa-minus"></i><span>移除数据</span></button>
        </div>
    </div>
    <BlockLogger @ref="Logger" class="mt-3" />
</DemoBlock>

<DemoBlock Title="Bar 图" Introduction="通过设置 X/Y 轴 <code>Stacked</code> 属性，控制是否堆砌排列" Name="BarStacked">
    <Chart ChartType="ChartType.Bar" OnInitAsync="() => OnInit(true)" />
</DemoBlock>

<ChartToast />

// Copyright (c) Argo Zhang (argo@163.com). All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
// Website: https://www.blazor.zone or https://argozhang.github.io/

using BootstrapBlazor.Components;
using BootstrapBlazor.Shared.Components;
using System;
using System.Diagnostics.CodeAnalysis;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;

namespace BootstrapBlazor.Shared.Samples.Charts;

/// <summary>
/// 
/// </summary>
public partial class Bar
{
    private Random Randomer { get; } = new Random();
    private int BarDatasetCount = 2;
    private int BarDataCount = 7;

    [NotNull]
    private Chart? BarChart { get; set; }

    [NotNull]
    private BlockLogger? Logger { get; set; }
    /// <summary>
    /// 
    /// </summary>
    /// <param name="firstRender"></param>
    protected override void OnAfterRender(bool firstRender)
    {
        base.OnAfterRender(firstRender);

        if (firstRender)
        {
            Logger.Log("Bar 正在加载数据 ...");
        }
    }

    private Task OnAfterInit()
    {
        Logger.Log("Bar 初始化完毕");
        return Task.CompletedTask;
    }

    private Task OnAfterUpdate(ChartAction action) => InvokeAsync(() => Logger.Log($"Bar 图更新数据操作完毕 -- {action}"));

    private Task<ChartDataSource> OnInit(bool stacked)
    {
        var ds = new ChartDataSource();
        ds.Options.Title = "Bar 柱状图";
        ds.Options.X.Title = "天数";
        ds.Options.Y.Title = "数值";
        ds.Options.X.Stacked = stacked;
        ds.Options.Y.Stacked = stacked;
        ds.Labels = Enumerable.Range(1, BarDataCount).Select(i => i.ToString());
        for (var index = 0; index < BarDatasetCount; index++)
        {
            ds.Data.Add(new ChartDataset()
            {
                Label = $"数据集 {index}",
                Data = Enumerable.Range(1, BarDataCount).Select(i => Randomer.Next(20, 37)).Cast<object>()
            });
        }
        return Task.FromResult(ds);
    }

    private CancellationTokenSource _chartCancellationTokenSource = new();

    private Task OnPlayChart()
    {
        _chartCancellationTokenSource = new CancellationTokenSource();
        return Task.Run(async () =>
        {
            while (!_chartCancellationTokenSource.IsCancellationRequested)
            {
                await Task.Delay(800, _chartCancellationTokenSource.Token);
                if (!_chartCancellationTokenSource.IsCancellationRequested) await Utility.RandomData(BarChart);
            }
        });
    }

    private void OnStopChart() => _chartCancellationTokenSource.Cancel();
}