@page "/envelope/{EnvelopeKey}/DxReportViewer"
@using XtraReport = DevExpress.XtraReports.UI.XtraReport
@using DevExpress.Blazor.Reporting
@using Microsoft.Extensions.Options
@using EnvelopeGenerator.ReceiverUI.Options
@using EnvelopeGenerator.ReceiverUI.Services
@inject InMemoryReportStorageWebExtension ReportStorage
@inject DocumentService DocumentService
@inject IOptions<ApiOptions> AppOptions

<link href="_content/DevExpress.Blazor.Themes/blazing-berry.bs5.min.css" rel="stylesheet" />
<link href="_content/DevExpress.Blazor.Reporting.Viewer/css/dx-blazor-reporting-components.bs5.css" rel="stylesheet" />


@if (Report is not null) {
    <DxReportViewer Report="Report" RootCssClasses="w-100 h-100" Zoom="1.3" />
}

@code {
    [Parameter] public string EnvelopeKey { get; set; } = string.Empty;

    XtraReport? Report;
    byte[]? _basePdfBytes;

    protected override async Task OnInitializedAsync() {
        if (!AppOptions.Value.UsePredefinedReports) {
            var (pdfBytes, _) = await DocumentService.GetDocumentAsync(EnvelopeKey);
            if (pdfBytes is { Length: > 0 })
                _basePdfBytes = pdfBytes;
        }

        Report = BuildFreshBaseReport();
    }

    XtraReport BuildFreshBaseReport() {
        if (_basePdfBytes is { Length: > 0 }) {
            var report = new XtraReport();
            var detail = new DevExpress.XtraReports.UI.DetailBand();
            report.Bands.Add(detail);
            detail.Controls.Add(new DevExpress.XtraReports.UI.XRPdfContent { Source = _basePdfBytes, GenerateOwnPages = true });
            return report;
        }
        return CreateReportInstance();
    }

    XtraReport CreateReportInstance() {
        return ReportStorage.TryGetReport("LargeDatasetReport", out var savedReport)
            ? savedReport
            : PredefinedReports.ReportsFactory.GetReport("LargeDatasetReport");
    }
}