/* eslint-disable @typescript-eslint/member-ordering */
import {
  Component,
  inject,
  computed,
  signal
} from '@angular/core';
import { CommonModule } from '@angular/common';
import { FormsModule } from '@angular/forms';
import { Store } from '@ngrx/store';
import { NgIcon, provideIcons } from '@ng-icons/core';
import {
  lucideMessageSquare,
  lucideMic,
  lucideMicOff,
  lucideChevronLeft,
  lucideMonitor,
  lucideHash,
  lucideUsers,
  lucidePlus,
  lucideVolumeX
} from '@ng-icons/lucide';
import {
  selectOnlineUsers,
  selectCurrentUser,
  selectIsCurrentUserAdmin
} from '../../../store/users/users.selectors';
import {
  selectCurrentRoom,
  selectActiveChannelId,
  selectTextChannels,
  selectVoiceChannels
} from '../../../store/rooms/rooms.selectors';
import { UsersActions } from '../../../store/users/users.actions';
import { RoomsActions } from '../../../store/rooms/rooms.actions';
import { MessagesActions } from '../../../store/messages/messages.actions';
import { WebRTCService } from '../../../core/services/webrtc.service';
import { VoiceSessionService } from '../../../core/services/voice-session.service';
import { VoiceWorkspaceService } from '../../../core/services/voice-workspace.service';
import { VoiceActivityService } from '../../../core/services/voice-activity.service';
import { VoicePlaybackService } from '../../voice/voice-controls/services/voice-playback.service';
import { VoiceControlsComponent } from '../../voice/voice-controls/voice-controls.component';
import {
  ContextMenuComponent,
  UserAvatarComponent,
  ConfirmDialogComponent,
  UserVolumeMenuComponent
} from '../../../shared';
import {
  Channel,
  ChatEvent,
  RoomMember,
  Room,
  User
} from '../../../core/models/index';
import { v4 as uuidv4 } from 'uuid';

type TabView = 'channels' | 'users';

@Component({
  selector: 'app-rooms-side-panel',
  standalone: true,
  imports: [
    CommonModule,
    FormsModule,
    NgIcon,
    VoiceControlsComponent,
    ContextMenuComponent,
    UserVolumeMenuComponent,
    UserAvatarComponent,
    ConfirmDialogComponent
  ],
  viewProviders: [
    provideIcons({
      lucideMessageSquare,
      lucideMic,
      lucideMicOff,
      lucideChevronLeft,
      lucideMonitor,
      lucideHash,
      lucideUsers,
      lucidePlus,
      lucideVolumeX
    })
  ],
  templateUrl: './rooms-side-panel.component.html'
})
export class RoomsSidePanelComponent {
  private store = inject(Store);
  private webrtc = inject(WebRTCService);
  private voiceSessionService = inject(VoiceSessionService);
  private voiceWorkspace = inject(VoiceWorkspaceService);
  private voicePlayback = inject(VoicePlaybackService);
  voiceActivity = inject(VoiceActivityService);

  activeTab = signal<TabView>('channels');
  showFloatingControls = this.voiceSessionService.showFloatingControls;
  isVoiceWorkspaceExpanded = this.voiceWorkspace.isExpanded;
  onlineUsers = this.store.selectSignal(selectOnlineUsers);
  currentUser = this.store.selectSignal(selectCurrentUser);
  currentRoom = this.store.selectSignal(selectCurrentRoom);
  isAdmin = this.store.selectSignal(selectIsCurrentUserAdmin);
  activeChannelId = this.store.selectSignal(selectActiveChannelId);
  textChannels = this.store.selectSignal(selectTextChannels);
  voiceChannels = this.store.selectSignal(selectVoiceChannels);
  roomMembers = computed(() => this.currentRoom()?.members ?? []);
  roomMemberIdentifiers = computed(() => {
    const identifiers = new Set<string>();

    for (const member of this.roomMembers()) {
      this.addIdentifiers(identifiers, member);
    }

    return identifiers;
  });
  onlineRoomUsers = computed(() => {
    const memberIdentifiers = this.roomMemberIdentifiers();

    return this.onlineUsers().filter((user) => !this.isCurrentUserIdentity(user) && this.matchesIdentifiers(memberIdentifiers, user));
  });
  offlineRoomMembers = computed(() => {
    const onlineIdentifiers = new Set<string>();

    for (const user of this.onlineRoomUsers()) {
      this.addIdentifiers(onlineIdentifiers, user);
    }

    this.addIdentifiers(onlineIdentifiers, this.currentUser());

    return this.roomMembers().filter((member) => !this.matchesIdentifiers(onlineIdentifiers, member));
  });
  knownUserCount = computed(() => {
    const memberIds = new Set(
      this.roomMembers()
        .map((member) => this.roomMemberKey(member))
        .filter(Boolean)
    );
    const current = this.currentUser();

    if (current) {
      memberIds.add(current.oderId || current.id);
    }

    return memberIds.size;
  });

  showChannelMenu = signal(false);
  channelMenuX = signal(0);
  channelMenuY = signal(0);
  contextChannel = signal<Channel | null>(null);

  renamingChannelId = signal<string | null>(null);

  showCreateChannelDialog = signal(false);
  createChannelType = signal<'text' | 'voice'>('text');
  newChannelName = '';

  showUserMenu = signal(false);
  userMenuX = signal(0);
  userMenuY = signal(0);
  contextMenuUser = signal<User | null>(null);

  showVolumeMenu = signal(false);
  volumeMenuX = signal(0);
  volumeMenuY = signal(0);
  volumeMenuPeerId = signal('');
  volumeMenuDisplayName = signal('');

  private roomMemberKey(member: RoomMember): string {
    return member.oderId || member.id;
  }

  private addIdentifiers(identifiers: Set<string>, entity: { id?: string; oderId?: string } | null | undefined): void {
    if (!entity)
      return;

    if (entity.id) {
      identifiers.add(entity.id);
    }

    if (entity.oderId) {
      identifiers.add(entity.oderId);
    }
  }

  private matchesIdentifiers(identifiers: Set<string>, entity: { id?: string; oderId?: string }): boolean {
    return !!((entity.id && identifiers.has(entity.id)) || (entity.oderId && identifiers.has(entity.oderId)));
  }

  private isCurrentUserIdentity(entity: { id?: string; oderId?: string }): boolean {
    const current = this.currentUser();

    return !!current && (
      (typeof entity.id === 'string' && entity.id === current.id)
      || (typeof entity.oderId === 'string' && entity.oderId === current.oderId)
    );
  }

  canManageChannels(): boolean {
    const room = this.currentRoom();
    const user = this.currentUser();

    if (!room || !user)
      return false;

    if (room.hostId === user.id)
      return true;

    const perms = room.permissions || {};

    if (user.role === 'admin' && perms.adminsManageRooms)
      return true;

    if (user.role === 'moderator' && perms.moderatorsManageRooms)
      return true;

    return false;
  }

  selectTextChannel(channelId: string) {
    if (this.renamingChannelId())
      return;

    this.voiceWorkspace.showChat();
    this.store.dispatch(RoomsActions.selectChannel({ channelId }));
  }

  openChannelContextMenu(evt: MouseEvent, channel: Channel) {
    evt.preventDefault();
    this.contextChannel.set(channel);
    this.channelMenuX.set(evt.clientX);
    this.channelMenuY.set(evt.clientY);
    this.showChannelMenu.set(true);
  }

  closeChannelMenu() {
    this.showChannelMenu.set(false);
  }

  startRename() {
    const ch = this.contextChannel();

    this.closeChannelMenu();

    if (ch) {
      this.renamingChannelId.set(ch.id);
    }
  }

  confirmRename(event: Event) {
    const input = event.target as HTMLInputElement;
    const name = input.value.trim();
    const channelId = this.renamingChannelId();

    if (channelId && name) {
      this.store.dispatch(RoomsActions.renameChannel({ channelId, name }));
    }

    this.renamingChannelId.set(null);
  }

  cancelRename() {
    this.renamingChannelId.set(null);
  }

  deleteChannel() {
    const ch = this.contextChannel();

    this.closeChannelMenu();

    if (ch) {
      this.store.dispatch(RoomsActions.removeChannel({ channelId: ch.id }));
    }
  }

  resyncMessages() {
    this.closeChannelMenu();
    const room = this.currentRoom();

    if (!room) {
      return;
    }

    this.store.dispatch(MessagesActions.startSync());

    const peers = this.webrtc.getConnectedPeers();
    const inventoryRequest: ChatEvent = { type: 'chat-inventory-request', roomId: room.id };

    peers.forEach((pid) => {
      try {
        this.webrtc.sendToPeer(pid, inventoryRequest);
      } catch {
        return;
      }
    });
  }

  createChannel(type: 'text' | 'voice') {
    this.createChannelType.set(type);
    this.newChannelName = '';
    this.showCreateChannelDialog.set(true);
  }

  confirmCreateChannel() {
    const name = this.newChannelName.trim();

    if (!name)
      return;

    const type = this.createChannelType();
    const existing = type === 'text' ? this.textChannels() : this.voiceChannels();
    const channel: Channel = {
      id: type === 'voice' ? `vc-${uuidv4().slice(0, 8)}` : uuidv4().slice(0, 8),
      name,
      type,
      position: existing.length
    };

    this.store.dispatch(RoomsActions.addChannel({ channel }));
    this.showCreateChannelDialog.set(false);
  }

  cancelCreateChannel() {
    this.showCreateChannelDialog.set(false);
  }

  openUserContextMenu(evt: MouseEvent, user: User) {
    evt.preventDefault();

    if (!this.isAdmin())
      return;

    this.contextMenuUser.set(user);
    this.userMenuX.set(evt.clientX);
    this.userMenuY.set(evt.clientY);
    this.showUserMenu.set(true);
  }

  closeUserMenu() {
    this.showUserMenu.set(false);
  }

  openVoiceUserVolumeMenu(evt: MouseEvent, user: User) {
    evt.preventDefault();
    const me = this.currentUser();

    if (user.id === me?.id || user.oderId === me?.oderId)
      return;

    this.volumeMenuPeerId.set(user.oderId || user.id);
    this.volumeMenuDisplayName.set(user.displayName);
    this.volumeMenuX.set(evt.clientX);
    this.volumeMenuY.set(evt.clientY);
    this.showVolumeMenu.set(true);
  }

  changeUserRole(role: 'admin' | 'moderator' | 'member') {
    const user = this.contextMenuUser();
    const roomId = this.currentRoom()?.id;

    this.closeUserMenu();

    if (user) {
      this.store.dispatch(UsersActions.updateUserRole({ userId: user.id, role }));
      this.webrtc.broadcastMessage({
        type: 'role-change',
        roomId,
        targetUserId: user.id,
        role
      });
    }
  }

  kickUserAction() {
    const user = this.contextMenuUser();

    this.closeUserMenu();

    if (user) {
      this.store.dispatch(UsersActions.kickUser({ userId: user.id }));
    }
  }

  joinVoice(roomId: string) {
    const room = this.currentRoom();
    const current = this.currentUser();

    if (
      room
      && current?.voiceState?.isConnected
      && current.voiceState.roomId === roomId
      && current.voiceState.serverId === room.id
    ) {
      this.voiceWorkspace.open(null, { connectRemoteShares: true });
      return;
    }

    if (room && room.permissions && room.permissions.allowVoice === false) {
      return;
    }

    if (!room)
      return;

    if (current?.voiceState?.isConnected && current.voiceState.serverId !== room?.id) {
      if (!this.webrtc.isVoiceConnected()) {
        if (current.id) {
          this.store.dispatch(
            UsersActions.updateVoiceState({
              userId: current.id,
              voiceState: {
                isConnected: false,
                isMuted: false,
                isDeafened: false,
                roomId: undefined,
                serverId: undefined
              }
            })
          );
        }
      } else {
        return;
      }
    }

    const isSwitchingChannels = current?.voiceState?.isConnected && current.voiceState.serverId === room?.id && current.voiceState.roomId !== roomId;
    const enableVoicePromise = isSwitchingChannels ? Promise.resolve() : this.webrtc.enableVoice();

    enableVoicePromise
      .then(() => this.onVoiceJoinSucceeded(roomId, room, current ?? null))
      .catch(() => undefined);
  }

  private onVoiceJoinSucceeded(roomId: string, room: Room, current: User | null): void {
    this.updateVoiceStateStore(roomId, room, current);
    this.trackCurrentUserMic();
    this.startVoiceHeartbeat(roomId, room);
    this.broadcastVoiceConnected(roomId, room, current);
    this.startVoiceSession(roomId, room);
  }

  private trackCurrentUserMic(): void {
    const userId = this.currentUser()?.oderId || this.currentUser()?.id;
    const micStream = this.webrtc.getRawMicStream();

    if (userId && micStream) {
      this.voiceActivity.trackLocalMic(userId, micStream);
    }
  }

  private untrackCurrentUserMic(): void {
    const userId = this.currentUser()?.oderId || this.currentUser()?.id;

    if (userId) {
      this.voiceActivity.untrackLocalMic(userId);
    }
  }

  private updateVoiceStateStore(roomId: string, room: Room, current: User | null): void {
    if (!current?.id)
      return;

    this.store.dispatch(
      UsersActions.updateVoiceState({
        userId: current.id,
        voiceState: {
          isConnected: true,
          isMuted: current.voiceState?.isMuted ?? false,
          isDeafened: current.voiceState?.isDeafened ?? false,
          roomId,
          serverId: room.id
        }
      })
    );
  }

  private startVoiceHeartbeat(roomId: string, room: Room): void {
    this.webrtc.startVoiceHeartbeat(roomId, room.id);
  }

  private broadcastVoiceConnected(roomId: string, room: Room, current: User | null): void {
    this.webrtc.broadcastMessage({
      type: 'voice-state',
      oderId: current?.oderId || current?.id,
      displayName: current?.displayName || 'User',
      voiceState: {
        isConnected: true,
        isMuted: current?.voiceState?.isMuted ?? false,
        isDeafened: current?.voiceState?.isDeafened ?? false,
        roomId,
        serverId: room.id
      }
    });
  }

  private startVoiceSession(roomId: string, room: Room): void {
    const voiceChannel = this.voiceChannels().find((channel) => channel.id === roomId);
    const voiceRoomName = voiceChannel ? `🔊 ${voiceChannel.name}` : roomId;

    this.voiceSessionService.startSession({
      serverId: room.id,
      serverName: room.name,
      roomId,
      roomName: voiceRoomName,
      serverIcon: room.icon,
      serverDescription: room.description,
      serverRoute: `/room/${room.id}`
    });
  }

  leaveVoice(roomId: string) {
    const current = this.currentUser();

    if (!(current?.voiceState?.isConnected && current.voiceState.roomId === roomId))
      return;

    this.webrtc.stopVoiceHeartbeat();

    this.untrackCurrentUserMic();

    this.webrtc.disableVoice();

    if (current?.id) {
      this.store.dispatch(
        UsersActions.updateVoiceState({
          userId: current.id,
          voiceState: {
            isConnected: false,
            isMuted: false,
            isDeafened: false,
            roomId: undefined,
            serverId: undefined
          }
        })
      );
    }

    this.webrtc.broadcastMessage({
      type: 'voice-state',
      oderId: current?.oderId || current?.id,
      displayName: current?.displayName || 'User',
      voiceState: {
        isConnected: false,
        isMuted: false,
        isDeafened: false,
        roomId: undefined,
        serverId: undefined
      }
    });

    this.voiceSessionService.endSession();
  }

  voiceOccupancy(roomId: string): number {
    return this.voiceUsersInRoom(roomId).length;
  }

  viewShare(userId: string) {
    this.voiceWorkspace.focusStream(userId, { connectRemoteShares: true });
  }

  viewStream(userId: string) {
    this.voiceWorkspace.focusStream(userId, { connectRemoteShares: true });
  }

  isUserLocallyMuted(user: User): boolean {
    const peerId = user.oderId || user.id;

    return this.voicePlayback.isUserMuted(peerId);
  }

  isUserSharing(userId: string): boolean {
    const me = this.currentUser();

    if (me?.id === userId) {
      return this.webrtc.isScreenSharing();
    }

    const user = this.onlineUsers().find((onlineUser) => onlineUser.id === userId || onlineUser.oderId === userId);

    if (user?.screenShareState?.isSharing === false) {
      return false;
    }

    const peerKeys = [
      user?.oderId,
      user?.id,
      userId
    ].filter(
      (candidate): candidate is string => !!candidate
    );
    const stream = peerKeys
      .map((peerKey) => this.webrtc.getRemoteScreenShareStream(peerKey))
      .find((candidate) => !!candidate && candidate.getVideoTracks().length > 0) || null;

    return !!stream && stream.getVideoTracks().length > 0;
  }

  voiceUsersInRoom(roomId: string) {
    const room = this.currentRoom();
    const me = this.currentUser();
    const remoteUsers = this.onlineUsers().filter(
      (user) => !!user.voiceState?.isConnected && user.voiceState?.roomId === roomId && user.voiceState?.serverId === room?.id
    );

    if (
      me?.voiceState?.isConnected &&
      me.voiceState?.roomId === roomId &&
      me.voiceState?.serverId === room?.id
    ) {
      const meId = me.id;
      const meOderId = me.oderId;
      const alreadyIncluded = remoteUsers.some(
        (user) => user.id === meId || user.oderId === meOderId
      );

      if (!alreadyIncluded) {
        return [me, ...remoteUsers];
      }
    }

    return remoteUsers;
  }

  isCurrentRoom(roomId: string): boolean {
    const me = this.currentUser();
    const room = this.currentRoom();

    return !!(me?.voiceState?.isConnected && me.voiceState?.roomId === roomId && me.voiceState?.serverId === room?.id);
  }

  voiceEnabled(): boolean {
    const room = this.currentRoom();

    return room?.permissions?.allowVoice !== false;
  }

  getPeerLatency(user: User): number | null {
    const latencies = this.webrtc.peerLatencies();

    return latencies.get(user.oderId ?? '') ?? latencies.get(user.id) ?? null;
  }

  getPingColorClass(user: User): string {
    const ms = this.getPeerLatency(user);

    if (ms === null)
      return 'bg-gray-500';

    if (ms < 100)
      return 'bg-green-500';

    if (ms < 200)
      return 'bg-yellow-500';

    if (ms < 350)
      return 'bg-orange-500';

    return 'bg-red-500';
  }
}