ErsatzTV/ErsatzTV/Pages/DecoTemplates.razor

@page "/deco-templates"
@using ErsatzTV.Application.Scheduling
@using S = System.Collections.Generic
@implements IDisposable
@inject ILogger<DecoTemplates> Logger
@inject ISnackbar Snackbar
@inject IMediator Mediator
@inject IDialogService Dialog

<MudContainer MaxWidth="MaxWidth.ExtraLarge" Class="pt-8">
    <MudText Typo="Typo.h4" Class="mb-4">Deco Templates</MudText>
    <MudGrid>
        <MudItem xs="4">
            <div style="max-width: 400px;" class="mr-4">
                <MudCard>
                    <MudCardContent>
                        <MudTextField Class="mt-3 mx-3" Label="Deco Template Group Name" @bind-Value="_decoTemplateGroupName" For="@(() => _decoTemplateGroupName)"/>
                    </MudCardContent>
                    <MudCardActions>
                        <MudButton Variant="Variant.Filled" Color="Color.Primary" OnClick="@(_ => AddDecoTemplateGroup())" Class="ml-4 mb-4">
                            Add Deco Template Group
                        </MudButton>
                    </MudCardActions>
                </MudCard>
            </div>
        </MudItem>
        <MudItem xs="4">
            <div style="max-width: 400px;" class="mb-6">
                <MudCard>
                    <MudCardContent>
                        <div class="mx-4">
                            <MudSelect Label="Deco Template Group" @bind-Value="_selectedDecoTemplateGroup" Class="mt-3">
                                @foreach (DecoTemplateGroupViewModel decoTemplateGroup in _decoTemplateGroups)
                                {
                                    <MudSelectItem Value="@decoTemplateGroup">@decoTemplateGroup.Name</MudSelectItem>
                                }
                            </MudSelect>
                            <MudTextField Class="mt-3" Label="Deco Template Name" @bind-Value="_decoTemplateName" For="@(() => _decoTemplateName)"/>
                        </div>
                    </MudCardContent>
                    <MudCardActions>
                        <MudButton Variant="Variant.Filled" Color="Color.Primary" OnClick="@(_ => AddDecoTemplate())" Class="ml-4 mb-4">
                            Add Deco Template
                        </MudButton>
                    </MudCardActions>
                </MudCard>
            </div>
        </MudItem>
        <MudItem xs="8">
            <MudCard>
                <MudTreeView ServerData="LoadServerData" Items="@TreeItems" Hover="true" ExpandOnClick="true">
                    <ItemTemplate Context="item">
                        <MudTreeViewItem Items="@item.TreeItems" Icon="@item.Icon" CanExpand="@item.CanExpand" Value="@item">
                            <BodyContent>
                                <div style="display: grid; grid-template-columns: 1fr auto; align-items: center; width: 100%">
                                    <MudGrid Justify="Justify.FlexStart">
                                        <MudItem xs="8">
                                            <MudText>@item.Text</MudText>
                                        </MudItem>
                                    </MudGrid>
                                    <div style="justify-self: end;">
                                        @foreach (int decoTemplateId in Optional(item.DecoTemplateId))
                                        {
                                            <MudIconButton Icon="@Icons.Material.Filled.Edit" Size="Size.Medium" Color="Color.Inherit" Href="@($"deco-templates/{decoTemplateId}")"/>
                                        }
                                        <MudIconButton Icon="@Icons.Material.Filled.Delete" Size="Size.Medium" Color="Color.Inherit" OnClick="@(_ => DeleteItem(item))"/>
                                    </div>
                                </div>
                            </BodyContent>
                        </MudTreeViewItem>
                    </ItemTemplate>
                </MudTreeView>
            </MudCard>
        </MudItem>
    </MudGrid>
</MudContainer>

@code {
    private readonly CancellationTokenSource _cts = new();
    private S.HashSet<DecoTemplateTreeItemViewModel> TreeItems { get; set; } = [];
    private List<DecoTemplateGroupViewModel> _decoTemplateGroups = [];
    private DecoTemplateGroupViewModel _selectedDecoTemplateGroup;
    private string _decoTemplateGroupName;
    private string _decoTemplateName;

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

    protected override async Task OnParametersSetAsync()
    {
        await ReloadDecoTemplateGroups();
        await InvokeAsync(StateHasChanged);
    }

    private async Task ReloadDecoTemplateGroups()
    {
        _decoTemplateGroups = await Mediator.Send(new GetAllDecoTemplateGroups(), _cts.Token);
        TreeItems = _decoTemplateGroups.Map(g => new DecoTemplateTreeItemViewModel(g)).ToHashSet();
    }

    private async Task AddDecoTemplateGroup()
    {
        if (!string.IsNullOrWhiteSpace(_decoTemplateGroupName))
        {
            Either<BaseError, DecoTemplateGroupViewModel> result = await Mediator.Send(new CreateDecoTemplateGroup(_decoTemplateGroupName), _cts.Token);

            foreach (BaseError error in result.LeftToSeq())
            {
                Snackbar.Add(error.Value, Severity.Error);
                Logger.LogError("Unexpected error adding deco template group: {Error}", error.Value);
            }

            foreach (DecoTemplateGroupViewModel decoTemplateGroup in result.RightToSeq())
            {
                TreeItems.Add(new DecoTemplateTreeItemViewModel(decoTemplateGroup));
                _decoTemplateGroupName = null;

                _decoTemplateGroups = await Mediator.Send(new GetAllDecoTemplateGroups(), _cts.Token);
                await InvokeAsync(StateHasChanged);
            }
        }
    }

    private async Task AddDecoTemplate()
    {
        if (_selectedDecoTemplateGroup is not null && !string.IsNullOrWhiteSpace(_decoTemplateName))
        {
            Either<BaseError, DecoTemplateViewModel> result = await Mediator.Send(new CreateDecoTemplate(_selectedDecoTemplateGroup.Id, _decoTemplateName), _cts.Token);

            foreach (BaseError error in result.LeftToSeq())
            {
                Snackbar.Add(error.Value, Severity.Error);
                Logger.LogError("Unexpected error adding deco template: {Error}", error.Value);
            }

            foreach (DecoTemplateViewModel decoTemplate in result.RightToSeq())
            {
                foreach (DecoTemplateTreeItemViewModel item in TreeItems.Where(item => item.DecoTemplateGroupId == _selectedDecoTemplateGroup.Id))
                {
                    item.TreeItems.Add(new DecoTemplateTreeItemViewModel(decoTemplate));
                }

                _decoTemplateName = null;
                await InvokeAsync(StateHasChanged);
            }
        }
    }

    private async Task<S.HashSet<DecoTemplateTreeItemViewModel>> LoadServerData(DecoTemplateTreeItemViewModel parentNode)
    {
        foreach (int decoTemplateGroupId in Optional(parentNode.DecoTemplateGroupId))
        {
            List<DecoTemplateViewModel> result = await Mediator.Send(new GetDecoTemplatesByDecoTemplateGroupId(decoTemplateGroupId), _cts.Token);
            foreach (DecoTemplateViewModel decoTemplate in result)
            {
                parentNode.TreeItems.Add(new DecoTemplateTreeItemViewModel(decoTemplate));
            }
        }

        return parentNode.TreeItems;
    }

    private async Task DeleteItem(DecoTemplateTreeItemViewModel treeItem)
    {
        foreach (int decoTemplateGroupId in Optional(treeItem.DecoTemplateGroupId))
        {
            var parameters = new DialogParameters { { "EntityType", "Deco Template group" }, { "EntityName", treeItem.Text } };
            var options = new DialogOptions { CloseButton = true, MaxWidth = MaxWidth.ExtraSmall };

            IDialogReference dialog = await Dialog.ShowAsync<DeleteDialog>("Delete Deco Template Group", parameters, options);
            DialogResult result = await dialog.Result;
            if (!result.Canceled)
            {
                await Mediator.Send(new DeleteDecoTemplateGroup(decoTemplateGroupId), _cts.Token);
                TreeItems.RemoveWhere(i => i.DecoTemplateGroupId == decoTemplateGroupId);

                _decoTemplateGroups = await Mediator.Send(new GetAllDecoTemplateGroups(), _cts.Token);
                await InvokeAsync(StateHasChanged);
            }
        }

        foreach (int decoTemplateId in Optional(treeItem.DecoTemplateId))
        {
            var parameters = new DialogParameters { { "EntityType", "Deco Template" }, { "EntityName", treeItem.Text } };
            var options = new DialogOptions { CloseButton = true, MaxWidth = MaxWidth.ExtraSmall };

            IDialogReference dialog = await Dialog.ShowAsync<DeleteDialog>("Delete Deco Template", parameters, options);
            DialogResult result = await dialog.Result;
            if (!result.Canceled)
            {
                await Mediator.Send(new DeleteDecoTemplate(decoTemplateId), _cts.Token);
                foreach (DecoTemplateTreeItemViewModel parent in TreeItems)
                {
                    parent.TreeItems.Remove(treeItem);
                }

                await InvokeAsync(StateHasChanged);
            }
        }
    }

}