Wollmilchsau/Wollmilchsau/Components/Pages/Teachers/QuestionaireResults.razor

@page "/teachers/questionaire-results"
@using Marten
@using Microsoft.AspNetCore.Authorization
@using Wollmilchsau.Models
@using Wollmilchsau.Services.Ldap
@attribute [Authorize(Roles = "ROLE_TEACHER,ROLE_ADMIN")]
@inject ILdapService LdapService
@inject IDocumentSession DocumentSession

<PageTitle>Questionnaire results</PageTitle>

<MudContainer MaxWidth="MaxWidth.Large" Class="mt-6 mb-6">
    <MudText Typo="Typo.h3" GutterBottom="true">Questionnaire results</MudText>
    <MudText Typo="Typo.body1" Class="mb-6">Eligible students and their submitted semester preferences.</MudText>

    @if (isLoading)
    {
        <MudStack AlignItems="AlignItems.Center" Class="py-8">
            <MudProgressCircular Color="Color.Primary" Indeterminate="true" />
            <MudText>Loading questionnaire results...</MudText>
        </MudStack>
    }
    else if (results.Count == 0)
    {
        <MudAlert Severity="Severity.Info">No eligible students were found.</MudAlert>
    }
    else
    {
        <MudAlert Severity="Severity.Info" Variant="Variant.Outlined" Class="mb-4">
            @CompletedCount of @results.Count eligible students have submitted their choices.
        </MudAlert>

        <MudStack Spacing="4">
            @foreach (var classroom in results.GroupBy(result => result.Classroom).OrderBy(group => group.Key, StringComparer.OrdinalIgnoreCase))
            {
                <MudPaper Outlined="true" Class="pa-4">
                    <MudText Typo="Typo.h5" GutterBottom="true">@classroom.Key</MudText>

                    <MudStack Spacing="3">
                        @foreach (var result in classroom)
                        {
                            <MudPaper Elevation="0" Outlined="true" Class="pa-3">
                                <MudStack Row="true" Justify="Justify.SpaceBetween" AlignItems="AlignItems.Center" Class="mb-3">
                                    <div>
                                        <MudText Typo="Typo.h6">@result.DisplayName</MudText>
                                        <MudText Typo="Typo.caption" Color="Color.Secondary">@result.Username</MudText>
                                    </div>
                                    <MudChip T="string" Color="@(result.Submission is null ? Color.Warning : Color.Success)" Variant="Variant.Filled" Size="Size.Small">
                                        @(result.Submission is null ? "Not submitted" : "Submitted")
                                    </MudChip>
                                </MudStack>

                                @if (result.Submission is null)
                                {
                                    <MudText Color="Color.Secondary">This student has not made a choice yet.</MudText>
                                }
                                else
                                {
                                    <MudText Typo="Typo.caption" Color="Color.Secondary" Class="mb-2">Last updated: @result.Submission.SubmittedAt.LocalDateTime.ToString("g")</MudText>
                                    <MudGrid Spacing="2">
                                        @for (var alternativeIndex = 0; alternativeIndex < result.Submission.Alternatives.Count; alternativeIndex++)
                                        {
                                            var currentAlternativeIndex = alternativeIndex;
                                            var alternative = result.Submission.Alternatives[currentAlternativeIndex];
                                            <MudItem xs="12" md="4">
                                                <MudPaper Outlined="true" Class="pa-3 h-100">
                                                    <MudText Typo="Typo.subtitle2" GutterBottom="true">Alternative @(currentAlternativeIndex + 1)</MudText>
                                                    @for (var semesterIndex = 0; semesterIndex < alternative.Count; semesterIndex++)
                                                    {
                                                        <MudText Typo="Typo.body2">Semester @(semesterIndex + 1): @alternative[semesterIndex]</MudText>
                                                    }
                                                </MudPaper>
                                            </MudItem>
                                        }
                                    </MudGrid>
                                }
                            </MudPaper>
                        }
                    </MudStack>
                </MudPaper>
            }
        </MudStack>
    }
</MudContainer>

@code {
    private IReadOnlyList<StudentQuestionnaireResult> results = [];
    private bool isLoading = true;

    private int CompletedCount => results.Count(result => result.Submission is not null);

    protected override async Task OnInitializedAsync()
    {
        var submissions = await DocumentSession.Query<QuestionnaireSubmission>().ToListAsync();
        var submissionsByStudent = submissions
            .GroupBy(submission => submission.StudentId, StringComparer.OrdinalIgnoreCase)
            .ToDictionary(
                group => group.Key,
                group => group.OrderByDescending(submission => submission.SubmittedAt).First(),
                StringComparer.OrdinalIgnoreCase);
        var students = new List<LdapUser>();

        await foreach (var user in LdapService.GetAllUsers())
        {
            if (user.Role == LdapUserRole.Student &&
                Wollmilchsau.Store.QuestionnaireStore.QuestionnaireSubmissionPolicy.IsClassroomAllowed(user.Classroom))
            {
                students.Add(user);
            }
        }

        results = students
            .OrderBy(student => student.Classroom, StringComparer.OrdinalIgnoreCase)
            .ThenBy(student => student.Surname, StringComparer.OrdinalIgnoreCase)
            .ThenBy(student => student.GivenName, StringComparer.OrdinalIgnoreCase)
            .Select(student => new StudentQuestionnaireResult(
                student.Username,
                student.Classroom!,
                GetDisplayName(student),
                submissionsByStudent.GetValueOrDefault(student.Username)))
            .ToList();
        isLoading = false;
    }

    private static string GetDisplayName(LdapUser student)
    {
        var displayName = string.Join(" ", new[] { student.GivenName, student.Surname }.Where(value => !string.IsNullOrWhiteSpace(value)));
        return string.IsNullOrWhiteSpace(displayName) ? student.Username : displayName;
    }

    private sealed record StudentQuestionnaireResult(
        string Username,
        string Classroom,
        string DisplayName,
        QuestionnaireSubmission? Submission);
}