@page "/Signature"
@using Ril.BlazorSignatureCanvas
@using SkiaSharp
@inject IDIS_Service service

<MudText Typo="Typo.h3" GutterBottom="true">在线签名</MudText>
<MudText>我们把签名写入标识中,用于其他应用通过解析标识,获取来自边缘终端的签名</MudText>

 <SignatureCanvas
                    @ref="signatureCanvas"
                    width="256" height="512"
                    style="background-color: white; border: 1px solid black;"
                    MinLineWidth="0.5f"
                    MaxLineWidth="1"/>
<MudGrid>
    <MudItem xs="3">
        <MudPaper Class="pa-2">
            <MudStack Spacing="2">
                <MudTextField T="string" @bind-Value="@handle" Label="标识码"></MudTextField>
                <MudTextField T="string" @bind-Value="@type" Label="值类型"></MudTextField>
                <MudStack >
                    <MudStack Row="true">
                        <MudButton Variant="Variant.Outlined" @onclick=HandleClear>清除签名</MudButton>
                        <MudSpacer/>
                        <MudButton Variant="Variant.Outlined" Color="Color.Info" @onclick=HandleSave>保存签名</MudButton>
                    </MudStack>
                </MudStack>
            </MudStack>
            <MudAlert Severity="@severity">@message</MudAlert>
        </MudPaper>
    </MudItem>
</MudGrid>



@code {
    private string handle { get; set; } = string.Empty;
    string type { get; set; } = "signature";

    SignatureCanvas signatureCanvas { get; set; }

    private string message { get; set; } = "等待注册中";
    private Severity severity { get; set; } = Severity.Normal;

    protected override void OnAfterRender(bool firstRender)
    {
        if(!firstRender)return;
        {
            if(BITKit.Data.TryGetValue<string>("Signature.DefaultHandle",out var value))
            {
                handle = value;
            }
        }
        {
            if(BITKit.Data.TryGetValue<string>("Signature.DefaultType",out var value))
            {
                type = value;
            }
        }
        StateHasChanged();
    }

    async Task HandleClear()
    {
        await signatureCanvas.Clear();
    }

    async Task HandleSave()
    {
        message = "正在更新标识";
        severity = Severity.Normal;
        await InvokeAsync(StateHasChanged);

        using var bitmap = SKBitmap.Decode(await signatureCanvas.ToByteArray());
        using var signBitMap = SKBitmap.Decode(await signatureCanvas.ToByteArray());
        using var canvas = new SKCanvas(bitmap);
        canvas.Clear(SKColors.White);
        canvas.DrawBitmap(signBitMap, new SKPoint());
        
        using var rotatedData = bitmap.Encode(SKEncodedImageFormat.Png, 40);
				
        using var newMs = new MemoryStream();
        rotatedData.SaveTo(newMs);
        
        var data = Convert.ToBase64String(newMs.ToArray());
			
        data = "data:image/png;base64," + data;
        
        try
        {
            await service.UpdateAsync(handle,new Dictionary<string, object>()
            {
                {type,data},
            });
            message = "更新成功";
            severity = Severity.Success;
        }
        catch (Exception e)
        {
            message = e.Message;
            severity = Severity.Error;
        }
        await InvokeAsync(StateHasChanged);
    }
}