using System;
using XCEngine;

namespace Gameplay
{
    public sealed class ScriptComponentTargetProbe : MonoBehaviour
    {
        public int AwakeCount;
        public int StartCount;
        public int HostCallCount;
        public string HostName = string.Empty;

        public void Awake()
        {
            AwakeCount++;
            HostName = gameObject.Name;
        }

        public void Start()
        {
            StartCount++;
        }

        public void IncrementFromHost()
        {
            HostCallCount++;
        }
    }

    public sealed class ScriptComponentApiProbe : MonoBehaviour
    {
        public bool InitialHasTarget;
        public bool InitialLookupReturnedNull;
        public bool AddedTarget;
        public bool HasTargetAfterAdd;
        public bool LookupSucceededAfterAdd;
        public bool TryGetSucceededAfterAdd;
        public bool ReturnedSameInstance;
        public bool TargetEnabledAfterAdd;
        public int ObservedTargetAwakeCount;
        public int ObservedTargetStartCount;
        public int ObservedTargetHostCallCount;
        public string ObservedTargetHostName = string.Empty;

        public void Start()
        {
            InitialHasTarget = HasComponent<ScriptComponentTargetProbe>();
            InitialLookupReturnedNull = GetComponent<ScriptComponentTargetProbe>() == null;

            ScriptComponentTargetProbe added = AddComponent<ScriptComponentTargetProbe>();
            AddedTarget = added != null;
            HasTargetAfterAdd = HasComponent<ScriptComponentTargetProbe>();

            ScriptComponentTargetProbe resolved = GetComponent<ScriptComponentTargetProbe>();
            TryGetSucceededAfterAdd = TryGetComponent(out ScriptComponentTargetProbe tried);
            LookupSucceededAfterAdd = resolved != null;
            ReturnedSameInstance = added != null
                && ReferenceEquals(added, resolved)
                && ReferenceEquals(added, tried);

            if (added == null)
            {
                return;
            }

            added.IncrementFromHost();
            TargetEnabledAfterAdd = added.enabled;
            ObservedTargetAwakeCount = added.AwakeCount;
            ObservedTargetStartCount = added.StartCount;
            ObservedTargetHostCallCount = added.HostCallCount;
            ObservedTargetHostName = added.HostName ?? string.Empty;
        }
    }
}