using System;
using System.Collections.Generic;
using Script;
using Stary.Evo;
using Stary.Evo.UIFarme;
using UnityEngine;
using UnityEngine.U2D;
using UnityEngine.UI;
using Random = UnityEngine.Random;

namespace Unity.RenderStreaming
{
    public class StartPanel : BasePanel
    {
        /// <summary>
        ///     每个Participant的UI信息
        /// </summary>
        private readonly Dictionary<string, ParticipantUI> participantUIs = new();

        /// <summary>
        ///     返回按钮
        /// </summary>
        private Button _arrowLeft;

        private Text _meetingId;

        /// <summary>
        ///     房间号输入框
        /// </summary>
        private InputField _meetingNameInput;

        private Image _profileImage;

        /// <summary>
        ///     头像按钮
        /// </summary>
        private Button _profilePhoto;

        private int _profileSpriteIndex;
        private Sprite[] _profileSprites;

        /// <summary>
        ///     随机房间号按钮
        /// </summary>
        private Button _randomMeetingId;

        /// <summary>
        ///     头像Sprite Atlas
        /// </summary>
        private SpriteAtlas _spriteAtlas;

        /// <summary>
        ///     开始按钮
        /// </summary>
        private Button _startButton;

        /// <summary>
        ///     时间下拉选择框
        /// </summary>
        private Dropdown _timeDropdown;

        /// <summary>
        ///     Host连接
        /// </summary>
        private HostConnection hostConnection;

        /// <summary>
        ///     本地视频显示
        /// </summary>
        private RawImage localVideoImage;

        /// <summary>
        ///     麦克风流发送器
        /// </summary>
        private AudioStreamSender microphoneStreamer;

        [Header("Participant视频容器")] private Transform participantVideoContainer;

        /// <summary>
        ///     渲染流管理
        /// </summary>
        private SignalingManager renderStreaming;

        [Header("核心组件")] private RenderStreamingSettings settings;
        [Header("Host本地视频")] private VideoStreamSender videoStreamSender;

        public override UITweenType TweenType => UITweenType.Fade;

        public override string UIPath => "Canvas";

        public override void Initialize(GameObject panelGo)
        {
            base.Initialize(panelGo);
            renderStreaming = GameObject.FindObjectOfType<SignalingManager>();
            hostConnection = GameObject.FindObjectOfType<HostConnection>();
            videoStreamSender = hostConnection.GetComponent<VideoStreamSender>();
            microphoneStreamer = hostConnection.GetComponent<AudioStreamSender>();
            if (settings == null)
                settings = new RenderStreamingSettings();
            if (settings != null)
            {
                videoStreamSender.width = (uint)settings.StreamSize.x;
                videoStreamSender.height = (uint)settings.StreamSize.y;
            }

            if (renderStreaming.runOnAwake)
                return;
            if (settings != null)
                renderStreaming.useDefaultSettings = settings.UseDefaultSettings;
            if (settings?.SignalingSettings != null)
                renderStreaming.SetSignalingSettings(settings.SignalingSettings);
            renderStreaming.Run();
            _arrowLeft = panelGo.transform.Find("Herder/arrow-left").GetComponent<Button>();
            _profilePhoto = panelGo.transform.Find("HeadPortraits/MeetingInfoCard").GetComponent<Button>();
            _profileImage = _profilePhoto.transform.Find("mask/sprite").GetComponent<Image>();
            _meetingNameInput = panelGo.transform.Find("card/search/InputField").GetComponent<InputField>();
            _meetingId = panelGo.transform.Find("card/huiyiID/connectionId").GetComponent<Text>();
            _randomMeetingId = panelGo.transform.Find("card/huiyiID/Button").GetComponent<Button>();
            _timeDropdown = panelGo.transform.Find("card/time/Dropdown").GetComponent<Dropdown>();
            _startButton = panelGo.transform.Find("invite").GetComponent<Button>();
            _spriteAtlas = Resources.Load<SpriteAtlas>("SpriteAtlas");
            if (_spriteAtlas != null)
            {
                _profileSprites = new Sprite[_spriteAtlas.spriteCount];
                _spriteAtlas.GetSprites(_profileSprites);
            }

            _profileSpriteIndex = 0;
            OnClickProfilePhoto();
        }

        public override void OnEnter(Action complete = null)
        {
            base.OnEnter(complete);
            _arrowLeft.onClick.AddListener(OnClickArrowLeft);
            _profilePhoto.onClick.AddListener(OnClickProfilePhoto);
            _randomMeetingId.onClick.AddListener(OnClickRandomMeetingId);

            _startButton.onClick.AddListener(OnClickStartButton);
            if (hostConnection != null)
            {
                hostConnection.OnParticipantConnected += HandleParticipantConnected;
                hostConnection.OnParticipantDisconnected += HandleParticipantDisconnected;
            }

            // 本地视频：Sender启动后显示
            videoStreamSender.OnStartedStream += OnStartedStream;
        }


        public override void OnExit(float delay = 0)
        {
            base.OnExit(delay);
            _arrowLeft.onClick.RemoveListener(OnClickArrowLeft);
            _profilePhoto.onClick.RemoveListener(OnClickProfilePhoto);
            _randomMeetingId.onClick.RemoveListener(OnClickRandomMeetingId);
            _startButton.onClick.RemoveListener(OnClickStartButton);
            if (hostConnection != null)
            {
                hostConnection.OnParticipantConnected -= HandleParticipantConnected;
                hostConnection.OnParticipantDisconnected -= HandleParticipantDisconnected;
            }

            videoStreamSender.OnStartedStream -= OnStartedStream;
        }

        private void OnClickProfilePhoto()
        {
            if (_profileSprites == null || _profileSprites.Length == 0) return;
            _profileImage.sprite = _profileSprites[_profileSpriteIndex];
            this.GetSystem<IGlobalConfigSystem>().SetConnectionTexture(_profileSprites[_profileSpriteIndex].texture);
            _profileSpriteIndex = (_profileSpriteIndex + 1) % _profileSprites.Length;
        }

        private void OnClickArrowLeft()
        {
        }

        private void OnClickRandomMeetingId()
        {
            var meetingId = $"{Random.Range(100, 999)}-{Random.Range(100, 999)}-{Random.Range(100, 999)}";
            _meetingId.text = meetingId;
            if (string.IsNullOrEmpty(_meetingNameInput.text)) _meetingNameInput.text = $"{meetingId}的房间";
        }

        private void OnClickStartButton()
        {
            this.GetSystem<IGlobalConfigSystem>().SetConnectionTimeType(_timeDropdown.value);
            this.GetSystem<IGlobalConfigSystem>().SetConnectionId(_meetingId.text);
            hostConnection.RoomConnectionId = this.GetSystem<IGlobalConfigSystem>().GetConnectionId();
            this.GetSystem<IGlobalConfigSystem>().SetConnectionName(_meetingNameInput.text);
            this.GetSystem<IGlobalConfigSystem>().SetConnectionTexture(Texture2D.whiteTexture);
            SetUp();
            PanelSystem.PopQueue<StartPanel>();
            PanelSystem.PushQueue<MainPanel>();
        }

        private void OnStartedStream(string id)
        {
            if (videoStreamSender.sourceWebCamTexture != null)
                localVideoImage.texture = videoStreamSender.sourceWebCamTexture;
        }

        private class ParticipantUI
        {
            public Text nameLabel;
            public GameObject root;
            public RawImage videoImage;
        }


        #region 开启相关

        private void SetUp()
        {
            videoStreamSender.enabled = true;

            if (settings != null)
                videoStreamSender.SetCodec(settings.SenderVideoCodec);

            hostConnection.CreateConnection(hostConnection.RoomConnectionId);
        }

        private void HangUp()
        {
            hostConnection.DeleteConnection(hostConnection.RoomConnectionId);

            // 清理所有Participant UI
            foreach (var ui in participantUIs.Values)
                if (ui.root != null)
                    GameObject.Destroy(ui.root);

            participantUIs.Clear();

            localVideoImage.texture = null;
        }

        /// <summary>
        ///     新Participant连接成功回调
        ///     此时Participant的独立Receiver已创建，可以绑定视频显示
        /// </summary>
        private void HandleParticipantConnected(ParticipantStreams ps)
        {
            // 创建Participant UI
            var ui = CreateParticipantUI(ps.participantId);
            participantUIs[ps.participantId] = ui;

            // 绑定视频：当Receiver收到纹理时更新RawImage
            ps.videoReceiver.OnUpdateReceiveTexture += texture =>
            {
                ui.videoImage.color = Color.white;
                // 防止纹理为null时导致RawImage闪黑（重协商/track切换时可能短暂为null）
                if (ui.videoImage != null && texture != null)
                    ui.videoImage.texture = texture;
            };

            // 绑定音频：AudioSource已在HostConnection中配置
            ps.audioReceiver.OnUpdateReceiveAudioSource += source =>
            {
                if (source != null && !source.isPlaying)
                {
                    source.loop = true;
                    source.Play();
                }
            };

            Debug.Log($"[MultiParticipantHost] Participant UI created: {ps.participantId}");
        }

        /// <summary>
        ///     动态创建单个Participant的视频显示UI
        ///     结构: [NameLabel] + [RawImage(视频画面)]
        /// </summary>
        private ParticipantUI CreateParticipantUI(string participantId)
        {
            var ui = new ParticipantUI();

            // 根节点
            ui.root = new GameObject($"ParticipantUI_{participantId}");
            ui.root.transform.SetParent(participantVideoContainer, false);
            // 添加VerticalLayoutGroup使内容垂直排列
            var vlg = ui.root.AddComponent<VerticalLayoutGroup>();
            vlg.childControlWidth = true;
            vlg.childControlHeight = false;
            vlg.childForceExpandWidth = true;
            vlg.childForceExpandHeight = false;
            vlg.spacing = 2;
            ui.root.transform.GetComponent<RectTransform>().anchorMin = Vector2.zero;
            ui.root.transform.GetComponent<RectTransform>().anchorMax = Vector2.one;
            // 名称标签
            var labelObj = new GameObject("NameLabel");
            labelObj.transform.SetParent(ui.root.transform, false);
            ui.nameLabel = labelObj.AddComponent<Text>();
            ui.nameLabel.text = $"Participant: {participantId}";
            ui.nameLabel.fontSize = 14;
            ui.nameLabel.color = Color.white;
            ui.nameLabel.alignment = TextAnchor.MiddleCenter;
            var labelLayout = labelObj.AddComponent<LayoutElement>();
            labelLayout.preferredHeight = 20;

            // 视频画面
            var imageObj = new GameObject("VideoImage");
            imageObj.transform.SetParent(ui.root.transform, false);
            ui.videoImage = imageObj.AddComponent<RawImage>();
            ui.videoImage.color = Color.black;
            var imageLayout = imageObj.AddComponent<LayoutElement>();
            imageLayout.preferredHeight = 200;

            // AspectRatioFitter保持视频比例
            var aspectRatio = imageObj.AddComponent<AspectRatioFitter>();
            aspectRatio.aspectMode = AspectRatioFitter.AspectMode.FitInParent;
            aspectRatio.aspectRatio = 16f / 9f;

            return ui;
        }

        /// <summary>
        ///     Participant断开连接回调
        ///     销毁其UI
        /// </summary>
        private void HandleParticipantDisconnected(string participantId)
        {
            if (participantUIs.TryGetValue(participantId, out var ui))
            {
                if (ui.root != null)
                    GameObject.Destroy(ui.root);
                participantUIs.Remove(participantId);
            }

            Debug.Log($"[MultiParticipantHost] Participant UI removed: {participantId}");
        }

        #endregion
    }
}