using System.Collections.Generic;
using System.Linq;

namespace VisionCommon {
    public static class CamPatternAgentManager {
        private static object _lock = new object();
        public static Dictionary<eCamId, PatternAgentBase> _PatternAgents = new Dictionary<eCamId, PatternAgentBase>();

        public static void SetAgent(eCamId camId, PatternAgentBase patternAgent) {
            lock (_lock) {
                if (!_PatternAgents.ContainsKey(camId)) {
                    _PatternAgents.Add(camId, patternAgent);
                }
            }
        }

        public static PatternAgentBase GetAgent(eCamId camId) {
            lock (_lock) {
                if (VisionSettingManager.VisionSetting.UseCamPattern) {
                    if (_PatternAgents.ContainsKey(camId)) {
                        return _PatternAgents[camId];
                    }
                }
            }
            return null;
        }

        public static void DeleteUnusedAgent(List<eCamId> newCamIds) {
            lock (_lock) {
                if (_PatternAgents.Count > newCamIds.Count) {
                    foreach (eCamId oldCamId in _PatternAgents.Keys.ToList()) {
                        if (!newCamIds.Contains(oldCamId)) {
                            _PatternAgents[oldCamId].Dispose();
                            _PatternAgents.Remove(oldCamId);
                        }
                    }
                }
            }
        }

        public static bool IsNewCamId(eCamId camId) {
            lock (_lock) {
                if (!_PatternAgents.ContainsKey(camId)) {
                    return true;
                }
                else {
                    return false;
                }
            }
        }

        public static void Clear() {
            lock (_lock) {
                _PatternAgents.Clear();
            }
        }
    }
}