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@using System.Text.Json
@using LibMatrix
@using LibMatrix.EventTypes.Spec.State
@using LibMatrix.Helpers
@using LibMatrix.Homeservers
@using LibMatrix.Responses
@using LibMatrix.RoomTypes
@using MatrixUtils.Abstractions
@using MatrixUtils.Web.Classes.Constants
@if (RoomInfo is not null) {
    <div class="roomListItem @(HasDangerousRoomVersion ? "dangerousRoomVersion" : HasOldRoomVersion ? "oldRoomVersion" : "")" id="@RoomInfo.Room.RoomId">
        @if (OwnMemberState != null) {
            <MxcImage Class="@("avatar32" + (OwnMemberState?.AvatarUrl != GlobalProfile?.AvatarUrl ? " highlightChange" : "") + (ChildContent is not null ? " vcenter" : ""))"
                      MxcUri="@(OwnMemberState.AvatarUrl ?? GlobalProfile.AvatarUrl)"/>
            <span class="centerVertical border75 @(OwnMemberState?.AvatarUrl != GlobalProfile?.AvatarUrl ? "highlightChange" : "")">
                @(OwnMemberState?.DisplayName ?? GlobalProfile?.DisplayName ?? "Loading...")
            </span>
            <span class="centerVertical noLeftPadding">-></span>
        }
        <MxcImage Class="avatar32" MxcUri="@RoomInfo.RoomIcon" Style="@(ChildContent is not null ? "vertical-align: middle;" : "")"/>
        <div class="inlineBlock">
            <span class="centerVertical">@RoomInfo.RoomName</span>
            @if (ChildContent is not null) {
                @ChildContent
            }
        </div>

    </div>
}
else {
    <p>Warning: RoomInfo is null!</p>
}

@code {

    [Parameter]
    public RenderFragment? ChildContent { get; set; }

    [Parameter]
    public RoomInfo? RoomInfo {
        get => _roomInfo;
        set {
            _roomInfo = value;
            OnParametersSetAsync();
        }
    }

    [Parameter]
    public bool ShowOwnProfile { get; set; } = false;

    [Parameter]
    public RoomMemberEventContent? OwnMemberState { get; set; }

    [CascadingParameter]
    public UserProfileResponse? GlobalProfile { get; set; }

    [Parameter]
    public bool LoadData {
        get => _loadData;
        set {
            _loadData = value;
            OnParametersSetAsync();
        }
    }

    private bool HasOldRoomVersion { get; set; } = false;
    private bool HasDangerousRoomVersion { get; set; } = false;

    private static SemaphoreSlim _semaphoreSlim = new(8);
    private RoomInfo? _roomInfo;
    private bool _loadData = false;
    private static AuthenticatedHomeserverGeneric? hs { get; set; }

    private bool _hooked;
    protected override async Task OnParametersSetAsync() {
        if (RoomInfo != null) {
            if (!_hooked) {
                _hooked = true;
                RoomInfo.PropertyChanged += (_, a) => {
                    Console.WriteLine(a.PropertyName);
                    StateHasChanged();
                };
            }

            if (LoadData) {
                try {
                    await RoomInfo.GetStateEvent("m.room.create");
                    if (ShowOwnProfile)
                        OwnMemberState ??= (await RoomInfo.GetStateEvent("m.room.member", hs.WhoAmI.UserId)).TypedContent as RoomMemberEventContent;

                    await RoomInfo.GetStateEvent("m.room.name");
                    await RoomInfo.GetStateEvent("m.room.avatar");
                }
                catch (MatrixException e) {
                    if (e.ErrorCode == "M_FORBIDDEN") {
                        LoadData = false;
                        RoomInfo.StateEvents.Add(new() {
                            Type = "m.room.create",
                            TypedContent = new RoomCreateEventContent() { RoomVersion = "0" }, 
                            RoomId = null, Sender = null, EventId = null //TODO: implement
                        });
                        RoomInfo.StateEvents.Add(new() {
                            Type = "m.room.name",
                            TypedContent = new RoomNameEventContent() {
                                Name = "M_FORBIDDEN: Are you a member of this room? " + RoomInfo.Room.RoomId
                            },
                            RoomId = null, Sender = null, EventId = null //TODO: implement
                        });
                    }
                }
            }
        }

        await base.OnParametersSetAsync();
    }

    protected override async Task OnInitializedAsync() {
        await base.OnInitializedAsync();

        await _semaphoreSlim.WaitAsync();

        hs ??= await RMUStorage.GetCurrentSessionOrNavigate();
        if (hs is null) return;

        try {
            await CheckRoomVersion();
    // await GetRoomInfo();
    // await LoadOwnProfile();
        }
        catch (MatrixException e) {
            if (e is not { ErrorCode: "M_FORBIDDEN" }) {
                throw;
            }
    // RoomName = "Error: " + e.Message;
    // RoomIcon = "/blobfox_outage.gif";
        }
        catch (Exception e) {
            Console.WriteLine($"Failed to load room info for {RoomInfo.Room.RoomId}: {e.Message}");
        }
        _semaphoreSlim.Release();
    }

    private async Task LoadOwnProfile() {
        if (!ShowOwnProfile) return;
        try {
    // OwnMemberState ??= (await RoomInfo.GetStateEvent("m.room.member", hs.UserId)).TypedContent as RoomMemberEventContent;
            GlobalProfile ??= await hs.GetProfileAsync(hs.UserId);
        }
        catch (MatrixException e) {
            if (e is { ErrorCode: "M_FORBIDDEN" }) {
                Console.WriteLine($"Failed to get profile for {hs.UserId}: {e.Message}");
                ShowOwnProfile = false;
            }
            else {
                throw;
            }
        }
    }

    private async Task CheckRoomVersion() {
        while (RoomInfo?.CreationEventContent is null) {
            Console.WriteLine($"Room creation event content for {RoomInfo.Room.RoomId} is null...");
            await Task.Delay(Random.Shared.Next(1000, 2500));
        }
        var ce = RoomInfo.CreationEventContent;
        if (int.TryParse(ce.RoomVersion, out var rv)) {
            if (rv < 10)
                HasOldRoomVersion = true;
        }
        else // treat unstable room versions as dangerous
            HasDangerousRoomVersion = true;

        if (RoomConstants.DangerousRoomVersions.Contains(ce.RoomVersion)) {
            HasDangerousRoomVersion = true;
    // RoomName = "Dangerous room: " + RoomName;
        }
    }

    // private async Task GetRoomInfo() {
    //     try {
    //         RoomName ??= ((await RoomInfo.GetStateEvent("m.room.name"))?.TypedContent as RoomNameEventContent)?.Name ?? RoomId;
    //
    //         var state = (await RoomInfo.GetStateEvent("m.room.avatar")).TypedContent as RoomAvatarEventContent;
    //         if (state?.Url is { } url) {
    //             RoomIcon = await hsResolver.ResolveMediaUri(hs.ServerName, url);
    // // Console.WriteLine($"Got avatar for room {RoomId}: {roomIcon} ({url})");
    //         }
    //     }
    //     catch (MatrixException e) {
    //         if (e is not { ErrorCode: "M_FORBIDDEN" }) {
    //             throw;
    //         }
    //     }
    // }

}