@page "/Dashboard/SessionPlaytime"
@inject GameService GameService

<PageHeader Title="Session Playtime" />

<Table TItem="GameAverageSessionData" DataSource="SessionData" Loading="@Loading" Responsive PageSize="100">
    <Column TData="string" Title="Icon">
        <Image Src="@GetIcon(context.Game)" Height="32" Width="32" Preview="false"></Image>
    </Column>
    <PropertyColumn Property="d => d.Game.Title" Title="Game" Sortable Filterable />
    <PropertyColumn Property="d => d.LastPlayed" Title="Last Played" Sortable Filterable>
        <LocalTime Value="context.LastPlayed" />
    </PropertyColumn>
    <PropertyColumn Property="d => d.SessionCount" Title="Sessions" Sortable Filterable />
    <PropertyColumn Property="d => d.TotalTime" Title="Total Time" Sortable />
    <PropertyColumn Property="d => d.AverageTime" Title="Average Session" Sortable DefaultSortOrder="SortDirection.Descending" />
</Table>

@code {
    Dictionary<string, TimeSpan> Playtimes = new Dictionary<string, TimeSpan>();

    ICollection<Game> Games { get; set; } = new List<Game>();
    IEnumerable<GameAverageSessionData> SessionData = new List<GameAverageSessionData>();

    bool Loading = true;

    protected override async Task OnAfterRenderAsync(bool firstRender)
    {
        if (firstRender)
            await LoadData();
    }

    private async Task LoadData()
    {
        Loading = true;
        
        Games = await GameService
            .Include(g => g.PlaySessions)
            .Include(g => g.Media.Where(m => m.Type == SDK.Enums.MediaType.Icon))
            .GetAsync();

        SessionData = Games.Select(g =>
        {
            var data = new GameAverageSessionData()
            {
                Game = g,
                TotalTime = new TimeSpan()
            };

            if (g.PlaySessions != null && g.PlaySessions.Any(g => g.End != null && g.Start != null))
            {
                var playSessions = g.PlaySessions.Where(s => s.Start != null && s.End != null);

                data.LastPlayed = playSessions.OrderByDescending(s => s.End).First().End.Value;
                data.SessionCount = playSessions.Count();

                foreach (var session in playSessions)
                {
                    data.TotalTime = data.TotalTime.Add(session.End.Value.Subtract(session.Start.Value));
                }

                data.AverageTime = TimeSpan.FromSeconds(data.TotalTime.TotalSeconds / data.SessionCount);
            }

            return data;
        });

        Loading = false;

        await InvokeAsync(StateHasChanged);
    }

    private string GetIcon(Game game)
    {
        var media = game?.Media?.FirstOrDefault(m => m.Type == SDK.Enums.MediaType.Icon);

        if (media != null)
            return $"/api/Media/{media.Id}/Download?fileId={media.FileId}";
        else
            return "/favicon.ico";
    }

    public class GameAverageSessionData
    {
        public Game Game { get; set; }
        public DateTime LastPlayed { get; set; }
        public TimeSpan TotalTime { get; set; }
        public int SessionCount { get; set; }
        public TimeSpan AverageTime { get; set; }
    }
}