import 'package:flutter/cupertino.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:provider/provider.dart';
import 'package:yumi/services/audio/rtc_manager.dart';

import '../../../../modules/room/seat/sc_seat_item.dart';

class RoomSeatWidget extends StatefulWidget {
  const RoomSeatWidget({super.key});

  @override
  State<RoomSeatWidget> createState() => _RoomSeatWidgetState();
}

class _RoomSeatWidgetState extends State<RoomSeatWidget> {
  static const int _defaultVoiceRoomSeatCount = 10;

  int _lastSeatCount = 0;

  int _normalizeSeatCount(int? seatCount) {
    switch (seatCount) {
      case 5:
      case 10:
      case 15:
      case 20:
        return seatCount ?? 0;
      default:
        return 0;
    }
  }

  int _resolvedSeatCount(_RoomSeatLayoutSnapshot snapshot) {
    final int liveSeatCount = _normalizeSeatCount(snapshot.seatCount);
    final int configuredSeatCount = _normalizeSeatCount(
      snapshot.configuredSeatCount,
    );
    final int seatCount =
        liveSeatCount > 0 ? liveSeatCount : configuredSeatCount;
    if (!snapshot.isExitingCurrentVoiceRoomSession && seatCount > 0) {
      _lastSeatCount = seatCount;
    }
    if (snapshot.isExitingCurrentVoiceRoomSession && _lastSeatCount > 0) {
      return _lastSeatCount;
    }
    if (snapshot.hasCurrentRoom && seatCount == 0) {
      return _lastSeatCount > 0 ? _lastSeatCount : _defaultVoiceRoomSeatCount;
    }
    return seatCount;
  }

  int _seatCountFromMicIndexes(Iterable<num> micIndexes) {
    var maxIndex = -1;
    var count = 0;
    for (final micIndex in micIndexes) {
      count += 1;
      final resolvedIndex = micIndex.toInt();
      if (resolvedIndex > maxIndex) {
        maxIndex = resolvedIndex;
      }
    }
    final indexedSeatCount = _normalizeSeatCount(maxIndex + 1);
    if (indexedSeatCount > 0) {
      return indexedSeatCount;
    }
    return _normalizeSeatCount(count);
  }

  int _seatContentVersion(RtcProvider provider) {
    var version = provider.roomWheatMap.length;
    final micIndexes =
        provider.roomWheatMap.keys.toList()..sort((a, b) => a.compareTo(b));
    for (final micIndex in micIndexes) {
      final seat = provider.micAtIndexForDisplay(micIndex);
      final user = seat?.user;
      version = Object.hash(
        version,
        micIndex,
        seat?.micLock ?? false,
        seat?.micMute ?? false,
        user?.id ?? "",
        user?.userAvatar ?? "",
        user?.userNickname ?? "",
        user?.roles ?? "",
        user?.getHeaddress()?.sourceUrl ?? "",
        user?.getHeaddress()?.cover ?? "",
        user?.getVIP()?.name ?? "",
      );
    }
    return version;
  }

  @override
  Widget build(BuildContext context) {
    return Selector<RtcProvider, _RoomSeatLayoutSnapshot>(
      selector:
          (context, provider) => _RoomSeatLayoutSnapshot(
            seatCount: _seatCountFromMicIndexes(provider.roomWheatMap.keys),
            seatContentVersion: _seatContentVersion(provider),
            configuredSeatCount:
                provider.currenRoom?.roomProfile?.roomSetting?.mikeSize
                    ?.toInt() ??
                provider.previewRoomSeatCount ??
                0,
            hasCurrentRoom: provider.currenRoom != null,
            isExitingCurrentVoiceRoomSession:
                provider.isExitingCurrentVoiceRoomSession,
          ),
      builder: (context, snapshot, child) {
        final int seatCount = _resolvedSeatCount(snapshot);
        return seatCount == 5
            ? _buildSeat5()
            : (seatCount == 10
                ? _buildSeat10()
                : (seatCount == 15
                    ? _buildSeat15()
                    : (seatCount == 20
                        ? _buildSeat20()
                        : Container(height: 180.w))));
      },
    );
  }

  _buildSeat5() {
    return Container(
      margin: EdgeInsets.only(top: 3.w, left: 10.w, right: 10.w),
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          Row(
            children: [
              Expanded(flex: 1, child: SCSeatItem(index: 0)),
              Expanded(flex: 1, child: SCSeatItem(index: 1)),
              Expanded(flex: 1, child: SCSeatItem(index: 2)),
              Expanded(flex: 1, child: SCSeatItem(index: 3)),
              Expanded(flex: 1, child: SCSeatItem(index: 4)),
            ],
          ),
        ],
      ),
    );
  }

  _buildSeat10() {
    return Container(
      margin: EdgeInsets.only(top: 3.w, left: 10.w, right: 10.w),
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          Row(
            children: [
              Expanded(flex: 1, child: SCSeatItem(index: 0)),
              Expanded(flex: 1, child: SCSeatItem(index: 1)),
              Expanded(flex: 1, child: SCSeatItem(index: 2)),
              Expanded(flex: 1, child: SCSeatItem(index: 3)),
              Expanded(flex: 1, child: SCSeatItem(index: 4)),
            ],
          ),
          Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [
              Expanded(flex: 1, child: SCSeatItem(index: 5)),
              Expanded(flex: 1, child: SCSeatItem(index: 6)),
              Expanded(flex: 1, child: SCSeatItem(index: 7)),
              Expanded(flex: 1, child: SCSeatItem(index: 8)),
              Expanded(flex: 1, child: SCSeatItem(index: 9)),
            ],
          ),
        ],
      ),
    );
  }

  _buildSeat15() {
    return Container(
      margin: EdgeInsets.only(top: 3.w, left: 10.w, right: 10.w),
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          Row(
            children: [
              Expanded(flex: 1, child: SCSeatItem(index: 0)),
              Expanded(flex: 1, child: SCSeatItem(index: 1)),
              Expanded(flex: 1, child: SCSeatItem(index: 2)),
              Expanded(flex: 1, child: SCSeatItem(index: 3)),
              Expanded(flex: 1, child: SCSeatItem(index: 4)),
            ],
          ),
          Row(
            children: [
              Expanded(flex: 1, child: SCSeatItem(index: 5)),
              Expanded(flex: 1, child: SCSeatItem(index: 6)),
              Expanded(flex: 1, child: SCSeatItem(index: 7)),
              Expanded(flex: 1, child: SCSeatItem(index: 8)),
              Expanded(flex: 1, child: SCSeatItem(index: 9)),
            ],
          ),
          Row(
            children: [
              Expanded(flex: 1, child: SCSeatItem(index: 10)),
              Expanded(flex: 1, child: SCSeatItem(index: 11)),
              Expanded(flex: 1, child: SCSeatItem(index: 12)),
              Expanded(flex: 1, child: SCSeatItem(index: 13)),
              Expanded(flex: 1, child: SCSeatItem(index: 14)),
            ],
          ),
        ],
      ),
    );
  }

  _buildSeat20() {
    return Container(
      margin: EdgeInsets.only(top: 3.w, left: 10.w, right: 10.w),
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          Row(
            children: [
              Expanded(flex: 1, child: SCSeatItem(index: 0)),
              Expanded(flex: 1, child: SCSeatItem(index: 1)),
              Expanded(flex: 1, child: SCSeatItem(index: 2)),
              Expanded(flex: 1, child: SCSeatItem(index: 3)),
              Expanded(flex: 1, child: SCSeatItem(index: 4)),
            ],
          ),
          Row(
            children: [
              Expanded(flex: 1, child: SCSeatItem(index: 5)),
              Expanded(flex: 1, child: SCSeatItem(index: 6)),
              Expanded(flex: 1, child: SCSeatItem(index: 7)),
              Expanded(flex: 1, child: SCSeatItem(index: 8)),
              Expanded(flex: 1, child: SCSeatItem(index: 9)),
            ],
          ),
          Row(
            children: [
              Expanded(flex: 1, child: SCSeatItem(index: 10)),
              Expanded(flex: 1, child: SCSeatItem(index: 11)),
              Expanded(flex: 1, child: SCSeatItem(index: 12)),
              Expanded(flex: 1, child: SCSeatItem(index: 13)),
              Expanded(flex: 1, child: SCSeatItem(index: 14)),
            ],
          ),
          Row(
            children: [
              Expanded(flex: 1, child: SCSeatItem(index: 15)),
              Expanded(flex: 1, child: SCSeatItem(index: 16)),
              Expanded(flex: 1, child: SCSeatItem(index: 17)),
              Expanded(flex: 1, child: SCSeatItem(index: 18)),
              Expanded(flex: 1, child: SCSeatItem(index: 19)),
            ],
          ),
        ],
      ),
    );
  }
}

class _RoomSeatLayoutSnapshot {
  const _RoomSeatLayoutSnapshot({
    required this.seatCount,
    required this.seatContentVersion,
    required this.configuredSeatCount,
    required this.hasCurrentRoom,
    required this.isExitingCurrentVoiceRoomSession,
  });

  final int seatCount;
  final int seatContentVersion;
  final int configuredSeatCount;
  final bool hasCurrentRoom;
  final bool isExitingCurrentVoiceRoomSession;

  @override
  bool operator ==(Object other) {
    if (identical(this, other)) {
      return true;
    }
    return other is _RoomSeatLayoutSnapshot &&
        other.seatCount == seatCount &&
        other.seatContentVersion == seatContentVersion &&
        other.configuredSeatCount == configuredSeatCount &&
        other.hasCurrentRoom == hasCurrentRoom &&
        other.isExitingCurrentVoiceRoomSession ==
            isExitingCurrentVoiceRoomSession;
  }

  @override
  int get hashCode => Object.hash(
    seatCount,
    seatContentVersion,
    configuredSeatCount,
    hasCurrentRoom,
    isExitingCurrentVoiceRoomSession,
  );
}