@using Hcs.WebApp.Services

@inject DialogService DialogService
@inject FileToParseService FileToParseService

<style>
    #uploadWithDragAndDrop {
        left: 0;
        --rz-upload-button-bar-background-color: transparent;
        --rz-upload-button-bar-padding: 0;
    }

        #uploadWithDragAndDrop .rz-fileupload-buttonbar .rz-fileupload-choose {
            width: 100%;
            text-align: center;
            font-size: 16px;
            padding: 75px 0;
        }
</style>

<RadzenStack JustifyContent="JustifyContent.Center" Style="height: 100%;">
    <RadzenAlert Visible="@hasError" AlertStyle="AlertStyle.Danger" Variant="Variant.Flat" Shade="Shade.Lighter" AllowClose="false">
        @errorMessage
    </RadzenAlert>
    <RadzenUpload id="uploadWithDragAndDrop" @ref="upload" Url="upload/parsing" Progress="@OnProgress" Complete="@OnCompleteAsync" Error="@OnError" Change="@OnChange" ChooseText="Перетащите сюда или нажмите, чтобы выбрать файл" Accept=".xlsx" Auto="false" Multiple="false" Style="width: 100%;" />
    <RadzenStack Orientation="Orientation.Horizontal" AlignItems="AlignItems.Center" JustifyContent="JustifyContent.End" Gap="0.5rem">
        <RadzenButton Click="@Upload" Visible="@(state == UploadState.Idle)" Disabled="@fileNotSelected" Text="Отправить" />
        <RadzenButton Click="@Close" Visible="@(state == UploadState.Idle)" ButtonStyle="ButtonStyle.Light" Text="Отмена" />
    </RadzenStack>
    <RadzenProgressBar Value="@progress" Visible="@(state != UploadState.Idle)" />
    <RadzenButton Click="@Close" Visible="@(state == UploadState.Completed)" Text="Закрыть" />
</RadzenStack>

@code {
    enum UploadState
    {
        Idle,
        InProgress,
        Completed
    }

    RadzenUpload upload;
    UploadState state;
    bool fileNotSelected = true;
    int progress;
    bool hasError;
    string errorMessage;
    int? fileToParseId;

    [Parameter]
    public required string UploaderId { get; set; }

    void Upload()
    {
        state = UploadState.InProgress;
        hasError = false;

        upload.Upload();
    }

    void Close()
    {
        DialogService.Close(fileToParseId);
    }

    void OnProgress(UploadProgressArgs args)
    {
        progress = args.Progress;
    }

    async Task OnCompleteAsync(UploadCompleteEventArgs args)
    {
        try
        {
            var root = args.JsonResponse.RootElement;
            var fileToParse = await FileToParseService.AddFileToParseAsync(
                root.GetProperty("path").GetString(),
                root.GetProperty("fileName").GetString(),
                UploaderId,
                DateTime.Now);
            fileToParseId = fileToParse.Id;
        }
        catch (Exception e)
        {
            hasError = true;
            errorMessage = e.Message;

            upload.ClearFiles();
        }

        state = hasError ? UploadState.Idle : UploadState.Completed;
    }

    void OnError(UploadErrorEventArgs args)
    {
        hasError = true;
        errorMessage = args.Message;

        upload.ClearFiles();

        state = UploadState.Idle;
    }

    void OnChange(UploadChangeEventArgs args)
    {
        fileNotSelected = args.Files.Count() <= 0;
    }
}