@using System.Text.Json
@using LibMatrix
@using LibMatrix.EventTypes.Spec.State
@using LibMatrix.Helpers
@using LibMatrix.Homeservers
@using LibMatrix.RoomTypes
@using MatrixRoomUtils.Web.Classes.Constants
<div class="roomListItem" id="@RoomId" style="background-color: #ffffff11; border-radius: 25px; margin: 8px; width: fit-Content; @(hasDangerousRoomVersion ? "border: red 4px solid;" : hasOldRoomVersion ? "border: #FF0 1px solid;" : "")">
    @if (OwnMemberState != null) {
        <img class="imageUnloaded @(string.IsNullOrWhiteSpace(OwnMemberState?.AvatarUrl ?? GlobalProfile?.AvatarUrl) ? "" : "imageLoaded")"
             style="@(ChildContent is not null ? "vertical-align: baseline;" : "") width: 32px; height: 32px; border-radius: 50%; @(OwnMemberState?.AvatarUrl != GlobalProfile?.AvatarUrl ? "border-color: red; border-width: 3px; border-style: dashed;" : "")"
             src="@hsResolver.ResolveMediaUri(hs.FullHomeServerDomain, OwnMemberState.AvatarUrl ?? GlobalProfile.AvatarUrl ?? "/icon-192.png").Result"/>
        <span style="vertical-align: middle; margin-right: 8px; border-radius: 75px; @(OwnMemberState?.AvatarUrl != GlobalProfile?.AvatarUrl ? "background-color: red;" : "")">
            @(OwnMemberState?.Displayname ?? GlobalProfile?.DisplayName ?? "Loading...")
        </span>
        <span style="vertical-align: middle; padding-right: 8px; padding-left: 0px;">-></span>
    }
    <img style="@(ChildContent is not null ? "vertical-align: baseline;" : "") width: 32px; height:  32px; border-radius: 50%;"
         src="@roomIcon"/>
    <div style="display: inline-block;">
        <span style="vertical-align: middle; padding-right: 8px;">@roomName</span>
        @if (ChildContent is not null) {
            @ChildContent
        }
    </div>

</div>

@code {

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

    [Parameter]
    public GenericRoom? Room { get; set; }

    [Parameter]
    public RoomInfo? RoomInfo { get; set; }

    [Parameter]
    public string? RoomId { get; set; }

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

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

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

    private string? roomName { get; set; }

    private string? roomIcon { get; set; } = "/icon-192.png";

    private bool hasOldRoomVersion { get; set; } = false;
    private bool hasDangerousRoomVersion { get; set; } = false;

    private static SemaphoreSlim _semaphoreSlim = new(8);
    private static AuthenticatedHomeserverGeneric? hs { get; set; }

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

        await _semaphoreSlim.WaitAsync();

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

        if (Room is null && RoomId is null && RoomInfo is null) {
            throw new ArgumentNullException(nameof(RoomId));
        }

        // sweep from roominfo to id
        if (RoomInfo is not null) Room = RoomInfo.Room;
        if(Room is not null) RoomId = Room.RoomId;

        //sweep from id to roominfo
        if(RoomId is not null) Room ??= hs.GetRoom(RoomId);
        if(Room is not null) RoomInfo ??= new RoomInfo {
            Room = Room
        };

        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 {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() {
        var ce = (await RoomInfo.GetStateEvent("m.room.create")).TypedContent as RoomCreateEventContent;
        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.FullHomeServerDomain, url);
                // Console.WriteLine($"Got avatar for room {RoomId}: {roomIcon} ({url})");
            }
        }
        catch (MatrixException e) {
            if (e is not { ErrorCode: "M_FORBIDDEN" }) {
                throw;
            }
        }
    }

}