@page "/channels"
@using ErsatzTV.Application.Channels
@using ErsatzTV.Application.Configuration
@using ErsatzTV.Application.FFmpegProfiles
@using System.Globalization
@implements IDisposable
@inject IDialogService _dialog
@inject IMediator _mediator

<MudContainer MaxWidth="MaxWidth.ExtraLarge" Class="pt-8">
    <MudTable Hover="true"
              @bind-RowsPerPage="@_rowsPerPage"
              ServerData="@(new Func<TableState, Task<TableData<ChannelViewModel>>>(ServerReload))"
              @ref="_table">
        <ToolBarContent>
            <MudText Typo="Typo.h6">Channels</MudText>
        </ToolBarContent>
        <ColGroup>
            <col style="width: 60px;"/>
            <col/>
            <col style="width: 15%"/>
            <col style="width: 15%"/>
            <col style="width: 15%"/>
            <col style="width: 15%"/>
            <col style="width: 120px;"/>
        </ColGroup>
        <HeaderContent>
            <MudTh>
                <MudTableSortLabel InitialDirection="SortDirection.Ascending" SortBy="new Func<ChannelViewModel, object>(x => decimal.Parse(x.Number))">Number</MudTableSortLabel>
            </MudTh>
            <MudTh>Logo</MudTh>
            <MudTh>
                <MudTableSortLabel SortBy="new Func<ChannelViewModel, object>(x => x.Name)">Name</MudTableSortLabel>
            </MudTh>
            <MudTh>Language</MudTh>
            <MudTh>Mode</MudTh>
            <MudTh>FFmpeg Profile</MudTh>
            <MudTh/>
        </HeaderContent>
        <RowTemplate>
            <MudTd DataLabel="Number">@context.Number</MudTd>
            <MudTd DataLabel="Logo">
                @if (!string.IsNullOrWhiteSpace(context.Logo))
                {
                    <MudElement HtmlTag="img" src="@($"iptv/logos/{context.Logo}")" Style="max-height: 50px"/>
                }
            </MudTd>
            <MudTd DataLabel="Name">@context.Name</MudTd>
            <MudTd DataLabel="Language">@context.PreferredAudioLanguageCode</MudTd>
            <MudTd DataLabel="Mode">@GetStreamingMode(context.StreamingMode)</MudTd>
            <MudTd DataLabel="FFmpeg Profile">
                @if (context.StreamingMode != StreamingMode.HttpLiveStreamingDirect)
                {
                    @_ffmpegProfiles.Find(p => p.Id == context.FFmpegProfileId)?.Name
                }
            </MudTd>
            <MudTd>
                <div style="align-items: center; display: flex;">
                    <MudTooltip Text="Edit Channel">
                        <MudIconButton Icon="@Icons.Material.Filled.Edit"
                                       Link="@($"channels/{context.Id}")">
                        </MudIconButton>
                    </MudTooltip>
                    <MudTooltip Text="Delete Channel">
                        <MudIconButton Icon="@Icons.Material.Filled.Delete"
                                       OnClick="@(_ => DeleteChannelAsync(context))">
                        </MudIconButton>
                    </MudTooltip>
                </div>
            </MudTd>
        </RowTemplate>
        <PagerContent>
            <MudTablePager/>
        </PagerContent>
    </MudTable>
    <MudButton Variant="Variant.Filled" Color="Color.Primary" Link="channels/add" Class="mt-4">
        Add Channel
    </MudButton>
</MudContainer>

@code {
    private readonly CancellationTokenSource _cts = new();

    private MudTable<ChannelViewModel> _table;
    private List<FFmpegProfileViewModel> _ffmpegProfiles;

    private int _rowsPerPage;

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

    protected override async Task OnParametersSetAsync()
    {
        _ffmpegProfiles = await _mediator.Send(new GetAllFFmpegProfiles(), _cts.Token);
        _rowsPerPage = await _mediator.Send(new GetConfigElementByKey(ConfigElementKey.ChannelsPageSize), _cts.Token)
            .Map(maybeRows => maybeRows.Match(ce => int.TryParse(ce.Value, out int rows) ? rows : 10, () => 10));
    }

    private async Task DeleteChannelAsync(ChannelViewModel channel)
    {
        var parameters = new DialogParameters { { "EntityType", "channel" }, { "EntityName", channel.Name } };
        var options = new DialogOptions { CloseButton = true, MaxWidth = MaxWidth.ExtraSmall };

        IDialogReference dialog = await _dialog.ShowAsync<DeleteDialog>("Delete Channel", parameters, options);
        DialogResult result = await dialog.Result;
        if (!result.Cancelled)
        {
            await _mediator.Send(new DeleteChannel(channel.Id), _cts.Token);
            await _table.ReloadServerData();
        }
    }

    private async Task<TableData<ChannelViewModel>> ServerReload(TableState state)
    {
        await _mediator.Send(new SaveConfigElementByKey(ConfigElementKey.ChannelsPageSize, state.PageSize.ToString()), _cts.Token);

        List<ChannelViewModel> channels = await _mediator.Send(new GetAllChannels(), _cts.Token);
        IOrderedEnumerable<ChannelViewModel> sorted = channels.OrderBy(c => decimal.Parse(c.Number));

        CultureInfo[] allCultures = CultureInfo.GetCultures(CultureTypes.NeutralCultures);
        var processedChannels = new List<ChannelViewModel>();
        foreach (ChannelViewModel channel in sorted)
        {
            Option<CultureInfo> maybeCultureInfo = allCultures.Find(
                ci => string.Equals(
                    ci.ThreeLetterISOLanguageName,
                    channel.PreferredAudioLanguageCode,
                    StringComparison.OrdinalIgnoreCase));

            maybeCultureInfo.Match(
                cultureInfo => processedChannels.Add(channel with { PreferredAudioLanguageCode = cultureInfo.EnglishName }),
                () => processedChannels.Add(channel));
        }

    // TODO: properly page this data
        return new TableData<ChannelViewModel>
        {
            TotalItems = channels.Count,
            Items = processedChannels.Skip(state.Page * state.PageSize).Take(state.PageSize)
        };
    }

    private static string GetStreamingMode(StreamingMode streamingMode) => streamingMode switch {
        StreamingMode.HttpLiveStreamingDirect => "HLS Direct",
        StreamingMode.HttpLiveStreamingSegmenter => "HLS Segmenter",
        StreamingMode.TransportStreamHybrid => "MPEG-TS",
        _ => "MPEG-TS (Legacy)"
        };

}