@page "/charts/line"
@inject IStringLocalizer<Line> Localizer

<DemoBlock Title="@Localizer["P1"]" Introduction="@Localizer["P2"]" Name="LineOnInit">
    <Chart @ref="LineChart" OnInitAsync="() => OnInit(0.4f, false)" OnAfterInitAsync="@OnAfterInit" OnAfterUpdateAsync="@OnAfterUpdate" />
    <div class="text-center mt-2 chart">
        <div class="btn-group">
            <button class="btn btn-primary" @onclick="e => Utility.RandomData(LineChart)"><i class="fa-solid fa-chart-line"></i><span>@Localizer["P3"]</span></button>
            <button class="btn btn-primary" @onclick="e => Utility.AddDataSet(LineChart, ref LineDatasetCount)"><i class="fa-solid fa-circle-plus"></i><span>@Localizer["P4"]</span></button>
            <button class="btn btn-primary" @onclick="e => Utility.RemoveDataSet(LineChart, ref LineDatasetCount)"><i class="fa-solid fa-circle-minus"></i><span>@Localizer["P5"]</span></button>
            <button class="btn btn-primary" @onclick="e => Utility.AddData(LineChart, ref LineDataCount)"><i class="fa-solid fa-plus"></i><span>@Localizer["P6"]</span></button>
            <button class="btn btn-primary" @onclick="e => Utility.RemoveData(LineChart, ref LineDataCount)"><i class="fa-solid fa-minus"></i><span>@Localizer["P7"]</span></button>
        </div>
    </div>
    <BlockLogger @ref="Logger" class="mt-3" />
</DemoBlock>

<DemoBlock Title="@Localizer["P8"]" Introduction="@Localizer["P9"]" Name="LineTension">
    <Chart OnInitAsync="() => OnInit(0f, false)" />
</DemoBlock>

<DemoBlock Title="@Localizer["P10"]" Introduction="@Localizer["P11"]" Name="LineNullable">
    <Chart OnInitAsync="() => OnInit(0f, true)" />
</DemoBlock>

// 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/

namespace BootstrapBlazor.Shared.Samples.Charts;

/// <summary>
/// 
/// </summary>
public partial class Line
{
    private Random Randomer { get; } = new Random();
    private int LineDatasetCount = 2;
    private int LineDataCount = 7;

    [NotNull]
    private Chart? LineChart { 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("Line loading data ...");
        }
    }

    private Task OnAfterInit()
    {
        Logger.Log("Line initialization is complete");
        return Task.CompletedTask;
    }

    private Task OnAfterUpdate(ChartAction action)
    {
        Logger.Log($"Line Figure update data operation completed -- {action}");
        return Task.CompletedTask;
    }

    private Task<ChartDataSource> OnInit(float tension, bool hasNull)
    {
        var ds = new ChartDataSource();
        ds.Options.Title = "Line Chart";
        ds.Options.X.Title = "days";
        ds.Options.Y.Title = "Numerical value";
        ds.Labels = Enumerable.Range(1, LineDataCount).Select(i => i.ToString());
        for (var index = 0; index < LineDatasetCount; index++)
        {
            ds.Data.Add(new ChartDataset()
            {
                Tension = tension,
                Label = $"Set {index}",
                Data = Enumerable.Range(1, LineDataCount).Select((i, index) => (index == 2 && hasNull) ? null! : (object)Randomer.Next(20, 37))
            });
        }
        return Task.FromResult(ds);
    }
}