@using PlaylistShared.Pwa.Components.Common
@using PlaylistShared.Shared.DTO
@using PlaylistShared.Shared.Enums
@using PlaylistShared.Shared.SharedPlaylist
@inject HttpClient Http
@inject ISnackbar Snackbar

<MudStack AlignItems="AlignItems.Stretch">
    <MudTextField @bind-Value="_searchQuery"
                    @bind-Value:after="SearchTracks"
                    Variant="Variant.Outlined"
                    FullWidth
                    Label="Название или ссылка на трек Яндекс.Музыки"
                    Disabled="@_isSearching"
                    Adornment="Adornment.End" AdornmentIcon="@Icons.Material.Filled.Search" AdornmentColor="Color.Secondary"
                    />

    <MudToggleGroup T="TrackSearchType"
                    @bind-Value="_searchType"
                    @bind-Value:after="SearchTracks"
                    Size="Size.Small"
                    Color="Color.Primary"
                    Disabled="@(_isSearching)"
                    >
        <MudToggleItem Value="TrackSearchType.All" Text="Все" />
        <MudToggleItem Value="TrackSearchType.Track" Text="Трек" />
        <MudToggleItem Value="TrackSearchType.Album" Text="Альбом" />
        <MudToggleItem Value="TrackSearchType.Artist" Text="Исполнитель" />
    </MudToggleGroup>

    <MudTable Items="@_searchResults"
                Virtualize="@true"
                Height="400px"
                Hover="true"
                Breakpoint="Breakpoint.Sm"
                Loading="@_isSearching">
        <RowTemplate>
            <MudTd Style="width: 100%;">
                <TrackItem Track="@context" PlaylistShareToken="@ShareToken" />
            </MudTd>
            <MudTd>
                <MudToggleIconButton Toggled="_addingTrackIds.Contains(context.TrackId)"
                                        Icon="@Icons.Material.Filled.AddCircle"
                                        Color="@Color.Primary"
                                        ToggledIcon="@Icons.Material.Filled.RemoveCircle"
                                        ToggledColor="@Color.Error"
                                        ToggledChanged="() => ToggleTrack(context)" />
            </MudTd>
        </RowTemplate>
    </MudTable>
</MudStack>

@code {
    [Parameter] public string ShareToken { get; set; } = string.Empty;
    [Parameter] public EventCallback OnTrackAdded { get; set; }
    [Parameter] public EventCallback OnTrackRemoved { get; set; }

    private string _searchQuery = "";
    private bool _isSearching = false;
    private bool _isFirstSearch = true;
    private TrackSearchType _searchType = TrackSearchType.All;
    private List<YandexTrack> _searchResults = new();
    private HashSet<string> _addingTrackIds = new();

    private async Task SearchTracks()
    {
        if (string.IsNullOrWhiteSpace(_searchQuery))
        {
            return;
        }

        var query = _searchQuery.Trim();
        var type = _searchType;
        bool byId = false;

        if (Uri.TryCreate(_searchQuery, UriKind.Absolute, out var uri) && uri.Host == "music.yandex.ru")
        {
            try
            {
                (type, query) = ParseYandexMusicUrl(uri);
                byId = true;
            }
            catch (Exception ex)
            {
                Snackbar.Add($"Ошибка распознавания URL: {ex.Message}", Severity.Error);
                return;
            }
        }

        _isFirstSearch = false;
        _isSearching = true;
        try
        {
            var url = $"/api/yandexsearch/tracks?query={Uri.EscapeDataString(query)}&type={Uri.EscapeDataString(type.ToString())}&limit=20";
            if (!string.IsNullOrEmpty(ShareToken))
                url += $"&shared_id={Uri.EscapeDataString(ShareToken)}";
            if (byId)
                url += $"&byId={byId}";

            var response = await Http.GetFromJsonAsync<ApiResponse<List<YandexTrack>>>(url);
            if (response?.Success == true)
                _searchResults = response.Data ?? new();
            else
                Snackbar.Add(response?.Error?.Message ?? "Ошибка поиска", Severity.Error);
        }
        catch (Exception ex)
        {
            Snackbar.Add($"Ошибка: {ex.Message}", Severity.Error);
        }
        finally
        {
            _isSearching = false;
            StateHasChanged();
        }

    }

    private async Task SearchTracksByQuery(string query)
    {
        if (string.IsNullOrWhiteSpace(query))
            return;

    }

    private async Task ToggleTrack(YandexTrack track)
    {
        if (_addingTrackIds.Contains(track.TrackId))
        {
            await RemoveTrack(track);
        }
        else
        {
            await AddTrack(track);
        }
    }

    private async Task RemoveTrack(YandexTrack track)
    {
        if (!_addingTrackIds.Remove(track.TrackId)) return;
        

        try
        {
            await RemoveTrackById(track.TrackId);
            await OnTrackRemoved.InvokeAsync();
            Snackbar.Add($"Трек \"{track.Title}\" удален", Severity.Success);
        }
        catch (Exception ex)
        {
            Snackbar.Add($"Ошибка добавления: {ex.Message}", Severity.Error);
            _addingTrackIds.Add(track.TrackId);
        }
        finally
        {
            StateHasChanged();
        }
    }

    private async Task AddTrack(YandexTrack track)
    {
        if (_addingTrackIds.Contains(track.TrackId)) return;
        _addingTrackIds.Add(track.TrackId);

        try
        {
            await AddTrackById(track.TrackId);
            await OnTrackAdded.InvokeAsync();
            Snackbar.Add($"Трек \"{track.Title}\" добавлен", Severity.Success);
        }
        catch (Exception ex)
        {
            Snackbar.Add($"Ошибка добавления: {ex.Message}", Severity.Error);
            _addingTrackIds.Remove(track.TrackId);
        }
        finally
        {
            StateHasChanged();
        }
    }

    private async Task AddTrackById(string trackId)
    {
        try
        {
            var request = new UpdateTrackListRequest { TrackIds = new List<string> { trackId } };
            var response = await Http.PostAsJsonAsync($"/api/sharedplaylist/{ShareToken}/add-tracks", request);
            if (response.IsSuccessStatusCode)
            {
                await OnTrackAdded.InvokeAsync(); // уведомляем родителя, что список треков изменился
            }
            else
            {
                var error = await response.Content.ReadFromJsonAsync<ApiResponse<object>>();
                Snackbar.Add(error?.Error?.Message ?? "Ошибка добавления трека", Severity.Error);
            }
        }
        catch (Exception ex)
        {
            Snackbar.Add($"Ошибка: {ex.Message}", Severity.Error);
        }
        finally
        {
            StateHasChanged();
        }
    }

    private async Task RemoveTrackById(string trackId)
    {
        try
        {
            var request = new UpdateTrackListRequest { TrackIds = new List<string> { trackId } };
            var response = await Http.PostAsJsonAsync($"/api/sharedplaylist/{ShareToken}/remove-tracks", request);
            if (response.IsSuccessStatusCode)
            {
                await OnTrackAdded.InvokeAsync(); // уведомляем родителя, что список треков изменился
            }
            else
            {
                var error = await response.Content.ReadFromJsonAsync<ApiResponse<object>>();
                Snackbar.Add(error?.Error?.Message ?? "Ошибка удаления трека", Severity.Error);
            }
        }
        catch (Exception ex)
        {
            Snackbar.Add($"Ошибка: {ex.Message}", Severity.Error);
        }
        finally
        {
            StateHasChanged();
        }
    }

    private static (TrackSearchType Type, string Id) ParseYandexMusicUrl(Uri uri)
    {
        var segments = uri.AbsolutePath.Split('/', StringSplitOptions.RemoveEmptyEntries);
        
        var dataMap = segments
            .Select((val, idx) => new { val, idx })
            .GroupBy(x => x.idx / 2)
            .ToDictionary(
                g => g.First().val,
                g => g.ElementAtOrDefault(1)?.val
            );

        if (dataMap.TryGetValue("track", out var trackId) && !string.IsNullOrEmpty(trackId))
            return (TrackSearchType.Track, trackId);
        if (dataMap.TryGetValue("album", out var albumId) && !string.IsNullOrEmpty(albumId))
            return (TrackSearchType.Album, albumId);
        if (dataMap.TryGetValue("playlist", out var playlistId) && !string.IsNullOrEmpty(playlistId))
            return (TrackSearchType.Playlist, playlistId);
        if (dataMap.TryGetValue("artist", out var artistId) && !string.IsNullOrEmpty(artistId))
            return (TrackSearchType.Artist, artistId);

        throw new ArgumentException("Unsupported URL pattern");
    }
}