@inject HttpClient Http



<div>
    @if (!string.IsNullOrEmpty(Image))
    {
        <div>
            <img src="@Image" />
        </div>
        <button @onclick="RemovePhoto" class="btn btn-primary">Remove</button>

    }

    <InputFile OnChange="FileChanged" Accept="@Accept"></InputFile>
</div>


@code {

    [Parameter]
    public string? Image { get; set; }

    [Parameter]
    public string? UploadLink { get; set; }

    [Parameter]
    public string? Accept { get; set; }



    IBrowserFile selectedFile;

    private CancellationTokenSource? _cancellationTokenSource;


    protected override async Task OnInitializedAsync()
    {

    }

    void RemovePhoto()
    {
        Image = "";
        selectedFile = null;
    }


    async Task FileChanged(InputFileChangeEventArgs e)
    {
        selectedFile = e.File;
        await GenerateBase64Preview(selectedFile);
    }


    public async Task<string> UploadFile()
    {
        var multipartContent = new MultipartFormDataContent();
        if (selectedFile != null)
        {
            var fileContent = new StreamContent(selectedFile.OpenReadStream());

            fileContent.Headers.ContentType = new MediaTypeHeaderValue(selectedFile.ContentType);

            multipartContent.Add(fileContent, "file", selectedFile.Name);

            var response = await Http.PostAsync(UploadLink, multipartContent);

            return await response.Content.ReadFromJsonAsync<string>();
            @* new ProgressMessageHandler(progress =>
{
_uploadProgress = progress;
StateHasChanged();
}) *@
        }
        return "";
    }


    private async Task GenerateBase64Preview(IBrowserFile file)
    {
        try
        {
            // Resize image for preview (optional)
            var resizedImage = await file.RequestImageFileAsync(
            file.ContentType,
            maxWidth: 800,
            maxHeight: 800);

            // Convert to base64
            using var stream = resizedImage.OpenReadStream(maxAllowedSize: file.Size);
            using var memoryStream = new MemoryStream();
            await stream.CopyToAsync(memoryStream);
            Image = $"data:{file.ContentType};base64,{Convert.ToBase64String(memoryStream.ToArray())}";
            @* ImageContentType = file.ContentType; *@
            StateHasChanged();
        }
        catch (Exception ex)
        {
            Console.WriteLine($"Error generating preview: {ex.Message}");
        }
    }

}