@page "/media/filler/presets/{Id:int}/edit"
@page "/media/filler/presets/add"
@using ErsatzTV.Application.Artists
@using ErsatzTV.Application.Filler
@using ErsatzTV.Application.MediaCollections
@using ErsatzTV.Application.MediaItems
@using ErsatzTV.Application.Television
@using ErsatzTV.Core.Domain.Filler
@using ErsatzTV.Validators
@using FluentValidation.Results
@implements IDisposable
@inject NavigationManager NavigationManager
@inject ILogger<FillerPresetEditor> Logger
@inject ISnackbar Snackbar
@inject IMediator Mediator

<MudForm Model="@_model" @ref="@_form" Validation="@(_validator.ValidateValue)" ValidationDelay="0" Style="max-height: 100%">
    <MudPaper Square="true" Style="display: flex; height: 64px; min-height: 64px; width: 100%; z-index: 100; align-items: center">
        <MudButton Variant="Variant.Filled" Color="Color.Primary" Class="ml-6" OnClick="@HandleSubmitAsync" StartIcon="@(IsEdit ? Icons.Material.Filled.Save : Icons.Material.Filled.Add)">@(IsEdit ? "Save Filler Preset" : "Add Filler Preset")</MudButton>
    </MudPaper>
    <div class="d-flex flex-column" style="height: 100vh; overflow-x: auto">
        <MudContainer MaxWidth="MaxWidth.ExtraLarge" Class="pt-8">
            <MudText Typo="Typo.h5" Class="mb-2">Filler Preset</MudText>
            <MudDivider Class="mb-6"/>
            <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
                <div class="d-flex">
                    <MudText>Name</MudText>
                </div>
                <MudTextField @bind-Value="_model.Name" For="@(() => _model.Name)"/>
            </MudStack>
            <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
                <div class="d-flex">
                    <MudText>Kind</MudText>
                </div>
                <MudSelect @bind-Value="_model.FillerKind" For="@(() => _model.FillerKind)" Disabled="@IsEdit">
                    <MudSelectItem Value="@(FillerKind.PreRoll)">Pre-Roll</MudSelectItem>
                    <MudSelectItem Value="@(FillerKind.MidRoll)">Mid-Roll</MudSelectItem>
                    <MudSelectItem Value="@(FillerKind.PostRoll)">Post-Roll</MudSelectItem>
                    <MudSelectItem Value="@(FillerKind.Tail)">Tail</MudSelectItem>
                    <MudSelectItem Value="@(FillerKind.Fallback)">Fallback</MudSelectItem>
                </MudSelect>
            </MudStack>
            <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
                <div class="d-flex">
                    <MudText>Mode</MudText>
                </div>
                <MudSelect @bind-Value="_model.FillerMode" For="@(() => _model.FillerMode)"
                           Disabled="@(_model.FillerKind is FillerKind.Fallback or FillerKind.Tail || _model.CollectionType is CollectionType.Playlist)">
                    <MudSelectItem Value="@(FillerMode.Duration)">Duration</MudSelectItem>
                    <MudSelectItem Value="@(FillerMode.Count)">Count</MudSelectItem>
                    <MudSelectItem Value="@(FillerMode.Pad)">Pad</MudSelectItem>
                    <MudSelectItem Value="@(FillerMode.RandomCount)">Random Count</MudSelectItem>
                </MudSelect>
            </MudStack>
            <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
                <div class="d-flex">
                    <MudText>Duration</MudText>
                </div>
                <MudTextField T="int"
                              @bind-Value="_model.DurationHours"
                              Adornment="Adornment.End"
                              AdornmentText="hours"
                              Disabled="@(_model.FillerMode != FillerMode.Duration)"/>
            </MudStack>
            <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
                <div class="d-flex"></div>
                <MudTextField T="int"
                              @bind-Value="_model.DurationMinutes"
                              Adornment="Adornment.End"
                              AdornmentText="minutes"
                              Disabled="@(_model.FillerMode != FillerMode.Duration)"/>
            </MudStack>
            <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
                <div class="d-flex"></div>
                <MudTextField T="int"
                              @bind-Value="_model.DurationSeconds"
                              Adornment="Adornment.End"
                              AdornmentText="seconds"
                              Disabled="@(_model.FillerMode != FillerMode.Duration)"/>
            </MudStack>
            <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
                <div class="d-flex">
                    <MudText>Count</MudText>
                </div>
                <MudTextField @bind-Value="@_model.Count" For="@(() => _model.Count)" Disabled="@(_model.FillerMode != FillerMode.Count && _model.FillerMode != FillerMode.RandomCount)"/>
            </MudStack>
            <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
                <div class="d-flex">
                    <MudText>Pad To Nearest Minute</MudText>
                </div>
                <MudSelect @bind-Value="_model.PadToNearestMinute" For="@(() => _model.PadToNearestMinute)" Disabled="@(_model.FillerMode != FillerMode.Pad)">
                    <MudSelectItem T="int?" Value="5">5 (:00, :05, :10, :15, :20, etc)</MudSelectItem>
                    <MudSelectItem T="int?" Value="10">10 (:00, :10, :20, :30, :40, :50)</MudSelectItem>
                    <MudSelectItem T="int?" Value="15">15 (:00, :15, :30, :45)</MudSelectItem>
                    <MudSelectItem T="int?" Value="30">30 (:00, :30)</MudSelectItem>
                </MudSelect>
            </MudStack>
            <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
                <div class="d-flex">
                    <MudText>Allow Watermarks</MudText>
                </div>
                <MudCheckBox @bind-Value="@_model.AllowWatermarks" For="@(() => _model.AllowWatermarks)" Dense="true"/>
            </MudStack>
            <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
                <div class="d-flex">
                    <MudText>Collection Type</MudText>
                </div>
                <MudSelect @bind-Value="_model.CollectionType" For="@(() => _model.CollectionType)">
                    <MudSelectItem Value="CollectionType.Collection">Collection</MudSelectItem>
                    <MudSelectItem Value="CollectionType.TelevisionShow">Television Show</MudSelectItem>
                    <MudSelectItem Value="CollectionType.TelevisionSeason">Television Season</MudSelectItem>
                    <MudSelectItem Value="CollectionType.Artist">Artist</MudSelectItem>
                    <MudSelectItem Value="CollectionType.MultiCollection">Multi Collection</MudSelectItem>
                    <MudSelectItem Value="CollectionType.SmartCollection">Smart Collection</MudSelectItem>
                    @if (_model.FillerKind is not FillerKind.Fallback and not FillerKind.Tail)
                    {
                        <MudSelectItem Value="CollectionType.Playlist">Playlist</MudSelectItem>
                    }
                </MudSelect>
            </MudStack>
            @if (_model.CollectionType == CollectionType.Collection)
            {
                <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
                    <div class="d-flex">
                        <MudText>Collection</MudText>
                    </div>
                    <MudSelect T="MediaCollectionViewModel" @bind-value="_model.Collection">
                        @foreach (MediaCollectionViewModel collection in _mediaCollections)
                        {
                            <MudSelectItem Value="@collection">@collection.Name</MudSelectItem>
                        }
                    </MudSelect>
                </MudStack>
            }
            @if (_model.CollectionType == CollectionType.MultiCollection)
            {
                <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
                    <div class="d-flex">
                        <MudText>Multi Collection</MudText>
                    </div>
                    <MudSelect T="MultiCollectionViewModel" @bind-value="_model.MultiCollection">
                        @foreach (MultiCollectionViewModel collection in _multiCollections)
                        {
                            <MudSelectItem Value="@collection">@collection.Name</MudSelectItem>
                        }
                    </MudSelect>
                </MudStack>
            }
            @if (_model.CollectionType == CollectionType.SmartCollection)
            {
                <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
                    <div class="d-flex">
                        <MudText>Smart Collection</MudText>
                    </div>
                    <MudSelect T="SmartCollectionViewModel" @bind-value="_model.SmartCollection">
                        @foreach (SmartCollectionViewModel collection in _smartCollections)
                        {
                            <MudSelectItem Value="@collection">@collection.Name</MudSelectItem>
                        }
                    </MudSelect>
                </MudStack>
            }
            @if (_model.CollectionType == CollectionType.TelevisionShow)
            {
                <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
                    <div class="d-flex">
                        <MudText>Television Show</MudText>
                    </div>
                    <MudSelect T="NamedMediaItemViewModel" @bind-value="_model.MediaItem">
                        @foreach (NamedMediaItemViewModel show in _televisionShows)
                        {
                            <MudSelectItem Value="@show">@show.Name</MudSelectItem>
                        }
                    </MudSelect>
                </MudStack>
            }
            @if (_model.CollectionType == CollectionType.TelevisionSeason)
            {
                <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
                    <div class="d-flex">
                        <MudText>Television Season</MudText>
                    </div>
                    <MudSelect T="NamedMediaItemViewModel" @bind-value="_model.MediaItem">
                        @foreach (NamedMediaItemViewModel season in _televisionSeasons)
                        {
                            <MudSelectItem Value="@season">@season.Name</MudSelectItem>
                        }
                    </MudSelect>
                </MudStack>
            }
            @if (_model.CollectionType == CollectionType.Artist)
            {
                <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
                    <div class="d-flex">
                        <MudText>Artist</MudText>
                    </div>
                    <MudSelect T="NamedMediaItemViewModel" @bind-value="_model.MediaItem">
                        @foreach (NamedMediaItemViewModel artist in _artists)
                        {
                            <MudSelectItem Value="@artist">@artist.Name</MudSelectItem>
                        }
                    </MudSelect>
                </MudStack>
            }
            @if (_model.CollectionType == CollectionType.Playlist)
            {
                <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
                    <div class="d-flex">
                        <MudText>Playlist Group</MudText>
                    </div>
                    <MudSelect T="PlaylistGroupViewModel"
                               Value="@_selectedPlaylistGroup"
                               ValueChanged="@(vm => UpdatePlaylistGroupItems(vm))">
                        @foreach (PlaylistGroupViewModel playlistGroup in _playlistGroups)
                        {
                            <MudSelectItem Value="@playlistGroup">@playlistGroup.Name</MudSelectItem>
                        }
                    </MudSelect>
                </MudStack>
                <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
                    <div class="d-flex">
                        <MudText>Playlist</MudText>
                    </div>
                    <MudSelect T="PlaylistViewModel" @bind-value="_model.Playlist">
                        @foreach (PlaylistViewModel playlist in _playlists)
                        {
                            <MudSelectItem Value="@playlist">@playlist.Name</MudSelectItem>
                        }
                    </MudSelect>
                </MudStack>
            }
            <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
                <div class="d-flex">
                    <MudText>Use Chapters As Media Items</MudText>
                </div>
                <MudCheckBox @bind-Value="@_model.UseChaptersAsMediaItems"
                             For="@(() => _model.UseChaptersAsMediaItems)"
                             Dense="true"
                             Disabled="@(_model.FillerKind is FillerKind.Fallback)">
                    <MudText Typo="Typo.caption" Style="font-weight: normal">Schedule individual chapters instead of entire files</MudText>
                </MudCheckBox>
            </MudStack>
            <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
                <div class="d-flex">
                    <MudText>Expression</MudText>
                </div>
                <MudTextField @bind-Value="_model.Expression"
                              For="@(() => _model.Expression)"
                              Disabled="@(_model.FillerKind is not FillerKind.MidRoll)"
                              HelperText="For mid-roll filler, only add filler when this expression evaluates to true for a given mid-roll point."/>
            </MudStack>
            <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="gap-md-8 mb-5">
                <div class="d-flex" style="width: 300px"></div>
                <MudText Typo="Typo.body2">
                    <span style="font-weight: bold;">total_points</span>: total number of potential mid-roll points
                    <br/>
                    <span style="font-weight: bold;">matched_points</span>: number of mid-roll points that have already matched the expression
                    <br/>
                    <span style="font-weight: bold;">total_duration</span>: total duration of the content, in seconds
                    <br/>
                    <span style="font-weight: bold;">total_progress</span>: normalized position from 0 to 1
                    <br/>
                    <span style="font-weight: bold;">last_mid_filler</span>: seconds since last mid-roll filler
                    <br/>
                    <span style="font-weight: bold;">remaining_duration</span>: duration of the content after this mid-roll point, in seconds
                    <br/>
                    <span style="font-weight: bold;">point</span>: the position of the mid-roll point, in seconds
                    <br/>
                    <span style="font-weight: bold;">num</span>: the mid-roll point number, starting with 1
                </MudText>
            </MudStack>
        </MudContainer>
    </div>
</MudForm>

@code {
    private CancellationTokenSource _cts;

    [Parameter]
    public int Id { get; set; }

    private readonly FillerPresetEditViewModel _model = new();
    private readonly FillerPresetEditViewModelValidator _validator = new();
    private MudForm _form;

    private readonly List<MediaCollectionViewModel> _mediaCollections = [];
    private readonly List<MultiCollectionViewModel> _multiCollections = [];
    private readonly List<SmartCollectionViewModel> _smartCollections = [];
    private readonly List<NamedMediaItemViewModel> _televisionShows = [];
    private readonly List<NamedMediaItemViewModel> _televisionSeasons = [];
    private readonly List<NamedMediaItemViewModel> _artists = [];
    private readonly List<PlaylistGroupViewModel> _playlistGroups = [];
    private readonly List<PlaylistViewModel> _playlists = [];

    private PlaylistGroupViewModel _selectedPlaylistGroup;

    public void Dispose()
    {
        _cts?.Cancel();
        _cts?.Dispose();
    }

    protected override async Task OnParametersSetAsync()
    {
        _cts?.Cancel();
        _cts?.Dispose();
        _cts = new CancellationTokenSource();
        var token = _cts.Token;

        try
        {
            _mediaCollections.AddRange(
                await Mediator.Send(new GetAllCollections(), token)
                    .Map(list => list.OrderBy(vm => vm.Name, StringComparer.CurrentCultureIgnoreCase).ToList()));
            _multiCollections.AddRange(
                await Mediator.Send(new GetAllMultiCollections(), token)
                    .Map(list => list.OrderBy(vm => vm.Name, StringComparer.CurrentCultureIgnoreCase).ToList()));
            _smartCollections.AddRange(
                await Mediator.Send(new GetAllSmartCollections(), token)
                    .Map(list => list.OrderBy(vm => vm.Name, StringComparer.CurrentCultureIgnoreCase).ToList()));
            _televisionShows.AddRange(
                await Mediator.Send(new GetAllTelevisionShows(), token)
                    .Map(list => list.OrderBy(vm => vm.Name, StringComparer.CurrentCultureIgnoreCase).ToList()));
            _televisionSeasons.AddRange(
                await Mediator.Send(new GetAllTelevisionSeasons(), token)
                    .Map(list => list.OrderBy(vm => vm.Name, StringComparer.CurrentCultureIgnoreCase).ToList()));
            _artists.AddRange(
                await Mediator.Send(new GetAllArtists(), token)
                    .Map(list => list.OrderBy(vm => vm.Name, StringComparer.CurrentCultureIgnoreCase).ToList()));

            _playlistGroups.AddRange(await Mediator.Send(new GetAllPlaylistGroups(), token));

            if (IsEdit)
            {
                Option<FillerPresetViewModel> maybeFillerPreset = await Mediator.Send(new GetFillerPresetById(Id), token);
                maybeFillerPreset.IfSome(fillerPreset =>
                {
                    _model.Id = fillerPreset.Id;
                    _model.Name = fillerPreset.Name;
                    _model.FillerKind = fillerPreset.FillerKind;
                    _model.FillerMode = fillerPreset.FillerMode;
                    _model.Duration = fillerPreset.Duration;
                    _model.Count = fillerPreset.Count;
                    _model.PadToNearestMinute = fillerPreset.PadToNearestMinute;
                    _model.AllowWatermarks = fillerPreset.AllowWatermarks;
                    _model.CollectionType = fillerPreset.CollectionType;
                    _model.Collection = fillerPreset.CollectionId.HasValue
                        ? _mediaCollections.Find(c => c.Id == fillerPreset.CollectionId.Value)
                        : null;
                    _model.MultiCollection = fillerPreset.MultiCollectionId.HasValue
                        ? _multiCollections.Find(c => c.Id == fillerPreset.MultiCollectionId.Value)
                        : null;
                    _model.SmartCollection = fillerPreset.SmartCollectionId.HasValue
                        ? _smartCollections.Find(c => c.Id == fillerPreset.SmartCollectionId.Value)
                        : null;
                    _model.MediaItem = fillerPreset.MediaItemId.HasValue
                        ? _televisionShows.Append(_televisionSeasons).Append(_artists).ToList().Find(vm => vm.MediaItemId == fillerPreset.MediaItemId.Value)
                        : null;
                    _model.Expression = fillerPreset.Expression;
                    _model.UseChaptersAsMediaItems = fillerPreset.UseChaptersAsMediaItems;
                    _model.Playlist = fillerPreset.Playlist;
                });
            }
            else
            {
                _model.Name = "New Filler Preset";
                _model.FillerKind = FillerKind.PreRoll;
                _model.FillerMode = FillerMode.Duration;
            }

            foreach (int playlistGroupId in Optional(_model.Playlist?.PlaylistGroupId))
            {
                foreach (PlaylistGroupViewModel group in Optional(_playlistGroups.Find(g => g.Id == playlistGroupId)))
                {
                    _selectedPlaylistGroup = group;
                    await UpdatePlaylistGroupItems(group);
                }
            }
        }
        catch (OperationCanceledException)
        {
            // do nothing
        }
    }

    private bool IsEdit => Id != 0;

    private async Task UpdatePlaylistGroupItems(PlaylistGroupViewModel playlistGroup)
    {
        _selectedPlaylistGroup = playlistGroup;

        _playlists.Clear();
        _playlists.AddRange(await Mediator.Send(new GetPlaylistsByPlaylistGroupId(playlistGroup.Id), _cts.Token));
    }

    private async Task HandleSubmitAsync()
    {
        await _form.Validate();
        ValidationResult result = await _validator.ValidateAsync(_model, _cts.Token);
        if (result.IsValid)
        {
            // Create/Update return different result types (Update -> Unit, Create -> CreateFillerPresetResult),
            // so send each on its own branch and reduce to the shared Left error sequence.
            Seq<BaseError> errorMessage = IsEdit
                ? (await Mediator.Send(_model.ToEdit(), _cts.Token)).LeftToSeq()
                : (await Mediator.Send(_model.ToUpdate(), _cts.Token)).LeftToSeq();

            errorMessage.HeadOrNone().Match(
                error =>
                {
                    Snackbar.Add(error.Value, Severity.Error);
                    Logger.LogError("Error saving filler preset: {Error}", error.Value);
                },
                () => NavigationManager.NavigateTo("media/filler/presets"));
        }
    }

}