@namespace WebApp.Components.Features.MeetingSchedule
@using Core.Entities
@using Core.Calculation
@using Core.Services
@using WebApp.Services
@using WebApp.Components.Shared.Components
@using WebApp.Models
@inject ITeamMeetingHistoryService TeamMeetingHistoryService
@inject INotesService NotesService
@inject INoteNamingService NoteNamingService
@inject ISnackbar Snackbar
@implements IAsyncDisposable

<MudDialog>
    <DialogContent>
        @if (_isLoading)
        {
            <MudProgressLinear Color="Color.Primary" Indeterminate="true" Class="my-4" />
        }
        else
        {
            <MudStack Spacing="3">
                <MudText Typo="Typo.h6">Save Meeting History</MudText>

                <MudDatePicker Label="Meeting Date"
                              Date="_meetingDate"
                              DateChanged="OnMeetingDateChanged"
                              Variant="Variant.Outlined" />

                <MudDivider />

                <MudText Typo="Typo.subtitle1">Teams That Met</MudText>
                <MudPaper Elevation="1" Class="pa-2" Style="max-height: 300px; overflow-y: auto;">
                    <MudToggleGroup T="Team"
                                  SelectionMode="SelectionMode.MultiSelection"
                                  Values="_selectedTeams"
                                  ValuesChanged="OnTeamsChanged"
                                  Vertical="true"
                                  CheckMark>
                        @foreach (var team in AllTeams.OrderByEventFormatFirst().ThenBy(e => e.ToString()))
                        {
                            <MudToggleItem Value="@team" Style="font-size: .75rem;">
                                @team.ToString()
                            </MudToggleItem>
                        }
                    </MudToggleGroup>
                </MudPaper>

                <MudDivider />

                <MudText Typo="Typo.subtitle1">Students Present</MudText>
                <MudPaper Elevation="1" Class="pa-2" Style="max-height: 300px; overflow-y: auto;">
                    <MudToggleGroup T="Student"
                                  SelectionMode="SelectionMode.MultiSelection"
                                  Values="_selectedStudents"
                                  ValuesChanged="OnStudentsChanged"
                                  Vertical="true"
                                  CheckMark>
                        @foreach (var student in AllStudents.OrderBy(s => s.FirstName))
                        {
                            <MudToggleItem Value="@student" Style="font-size: .75rem;">
                                @student.FirstNameLastName
                            </MudToggleItem>
                        }
                    </MudToggleGroup>
                </MudPaper>

                <MudDivider />

                <MudExpansionPanels MultiExpansion="false">
                    <MudExpansionPanel Text="Meeting Notes (Optional)">
                        <MudStack Spacing="2">
                            <MudTextField T="string"
                                        Label="Note Title"
                                        @bind-Value="_noteTitle"
                                        Variant="Variant.Outlined"
                                        ReadOnly="true"
                                        HelperText="Title is automatically generated based on meeting date" />
                            <MudTextField T="string"
                                        Label="Note Content"
                                        @bind-Value="_noteContent"
                                        Variant="Variant.Outlined"
                                        Lines="5"
                                        Placeholder="Enter meeting notes..."
                                        HelperText="Optional markdown content for meeting notes" />
                        </MudStack>
                    </MudExpansionPanel>
                </MudExpansionPanels>
            </MudStack>
        }
    </DialogContent>
    <DialogActions>
        <MudButton OnClick="Cancel" Disabled="@_isSaving">Cancel</MudButton>
        <MudButton Color="Color.Primary" Variant="Variant.Filled" OnClick="Save" Disabled="@IsSaveDisabled">
            @if (_isSaving)
            {
                <MudProgressCircular Size="Size.Small" Indeterminate="true" Class="mr-2" />
                <span>Saving...</span>
            }
            else
            {
                <span>Save</span>
            }
        </MudButton>
    </DialogActions>
</MudDialog>

@code {
    [CascadingParameter]
    IMudDialogInstance MudDialog { get; set; } = null!;

    [Parameter]
    public IEnumerable<Team> ScheduledTeams { get; set; } = [];

    [Parameter]
    public IEnumerable<Student> AbsentStudents { get; set; } = [];

    [Parameter]
    public IEnumerable<Team> AllTeams { get; set; } = [];

    [Parameter]
    public IEnumerable<Student> AllStudents { get; set; } = [];

    private DateTime? _meetingDate = DateTime.Today;
    private List<Team> _selectedTeams = [];
    private List<Student> _selectedStudents = [];
    private string _noteTitle = "";
    private string _noteContent = "";
    private bool _isLoading = true;
    private bool _isSaving = false;
    private CancellationTokenSource? _cancellationTokenSource;
    private bool _isDisposed = false;

    protected override void OnInitialized()
    {
        _cancellationTokenSource = new CancellationTokenSource();
    }

    protected override async Task OnInitializedAsync()
    {
        await LoadInitialData();
    }

    private async Task LoadInitialData()
    {
        if (_isDisposed) return;

        try
        {
            // Initialize selected teams from scheduled teams
            _selectedTeams = ScheduledTeams.ToList();

            // Initialize selected students (all students except absent ones)
            var absentStudentIds = AbsentStudents.Select(s => s.Id).ToHashSet();
            _selectedStudents = AllStudents.Where(s => !absentStudentIds.Contains(s.Id)).ToList();

            // Generate default note title if meeting date is set
            if (_meetingDate.HasValue)
            {
                _noteTitle = NoteNamingService.GetMeetingNoteTitle(_meetingDate.Value);
            }
        }
        catch (TaskCanceledException)
        {
            // Component was disposed, ignore
        }
        catch (JSDisconnectedException)
        {
            // JS connection lost, ignore
        }
        catch (Exception ex)
        {
            if (!_isDisposed)
            {
                Snackbar.Add($"Error loading data: {ex.Message}", Severity.Error);
            }
        }
        finally
        {
            if (!_isDisposed)
            {
                _isLoading = false;
                StateHasChanged();
            }
        }
    }

    private bool IsSaveDisabled => _isSaving || _isLoading;

    protected override async Task OnParametersSetAsync()
    {
        if (_meetingDate.HasValue && string.IsNullOrEmpty(_noteTitle))
        {
            _noteTitle = NoteNamingService.GetMeetingNoteTitle(_meetingDate.Value);
        }
        await base.OnParametersSetAsync();
    }

    private async Task OnMeetingDateChanged(DateTime? date)
    {
        _meetingDate = date;
        if (date.HasValue)
        {
            _noteTitle = NoteNamingService.GetMeetingNoteTitle(date.Value);
        }
        await InvokeAsync(StateHasChanged);
    }

    private void OnTeamsChanged(IEnumerable<Team> teams)
    {
        _selectedTeams = teams.ToList();
        StateHasChanged();
    }

    private void OnStudentsChanged(IEnumerable<Student> students)
    {
        _selectedStudents = students.ToList();
        StateHasChanged();
    }

    private async Task Save()
    {
        if (_isDisposed || _isSaving) return;

        if (!_meetingDate.HasValue)
        {
            Snackbar.Add("Please select a meeting date", Severity.Warning);
            return;
        }

        try
        {
            _isSaving = true;
            StateHasChanged();

            // Create or update note if note content is provided
            Note? note = null;
            if (!string.IsNullOrWhiteSpace(_noteContent))
            {
                // Use the naming service to get the meeting note title
                var noteTitle = NoteNamingService.GetMeetingNoteTitle(_meetingDate.Value);
                
                // Check if note already exists
                var existingNote = await NotesService.GetNotesAsync(includeDeleted: false);
                note = existingNote.FirstOrDefault(n => n.Title == noteTitle);
                
                if (note != null)
                {
                    // Update existing note
                    note.Content = _noteContent;
                    note = await NotesService.UpdateNoteAsync(note);
                }
                else
                {
                    // Create new note
                    note = new Note
                    {
                        Title = noteTitle,
                        Content = _noteContent
                    };
                    note = await NotesService.CreateNoteAsync(note);
                }
            }

            // Create meeting history
            var meetingHistory = new TeamMeetingHistory
            {
                MeetingDate = _meetingDate.Value,
                Teams = _selectedTeams,
                Students = _selectedStudents
            };

            await TeamMeetingHistoryService.CreateMeetingHistoryAsync(meetingHistory);

            if (!_isDisposed)
            {
                Snackbar.Add($"Meeting history saved for {_meetingDate.Value:MM/dd/yyyy}", Severity.Success);
                MudDialog.Close(DialogResult.Ok(true));
            }
        }
        catch (TaskCanceledException)
        {
            // Component was disposed, ignore
        }
        catch (JSDisconnectedException)
        {
            // JS connection lost, ignore
        }
        catch (Exception ex)
        {
            if (!_isDisposed)
            {
                Snackbar.Add($"Error saving meeting history: {ex.Message}", Severity.Error);
                _isSaving = false;
                StateHasChanged();
            }
        }
    }

    private void Cancel()
    {
        if (_isDisposed) return;
        MudDialog.Cancel();
    }

    public async ValueTask DisposeAsync()
    {
        if (!_isDisposed)
        {
            _isDisposed = true;
            _cancellationTokenSource?.Cancel();
            _cancellationTokenSource?.Dispose();
            _cancellationTokenSource = null;
        }
        await ValueTask.CompletedTask;
    }
}