using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using UMA;

public class UMAMountObject : MonoBehaviour
{
    [System.Serializable]
    public class mountInfo
    {
        [Tooltip("Prefab of the object that will get mounted.")]
        public GameObject objPrefab;
        [Tooltip("Name of the bone that the object will get mounted to.")]
        public string boneName;

        public Vector3 position;
        public Vector3 rotation;
        public Vector3 scale = Vector3.one;
    }
    [Tooltip("A list of the objects that can be dynamically mounted.")]
    public mountInfo[] mountInfos;

    private UMAData _umaData;
    private Dictionary<string, int> nameMap = new Dictionary<string, int>();

    void OnEnable()
    {
        if (_umaData == null)
            _umaData = gameObject.GetComponent<UMAData>();

        for (int i = 0; i < mountInfos.Length; i++)
        {
            if (nameMap.ContainsKey(mountInfos[i].objPrefab.name))
            {
                if (Debug.isDebugBuild)
                    Debug.LogWarning("ObjPrefab already added! " + mountInfos[i].objPrefab.name);
            }
            nameMap.Add(mountInfos[i].objPrefab.name, i);
        }
    }

    private bool IsValid()
    {
        if (_umaData == null)
            return false;

        if (mountInfos == null)
            return false;

        if (mountInfos.Length <= 0)
            return false;

        return true;
    }

    /// <summary>
    /// If a mount point already exists for a prefab, this function will change the mount info for that prefab to the given mountInfo
    /// </summary>
    /// <param name="newInfo"></param>
    public void ChangeMountInfo(mountInfo newInfo)
    {
        int index = -1;
        if (nameMap.TryGetValue(newInfo.objPrefab.name, out index))
        {
            mountInfos[index] = newInfo;
        }
        else
        {
            if (Debug.isDebugBuild)
            {
                Debug.LogWarning("ObjPrefab doesnt exist: " + mountInfos[index].objPrefab.name);
            }
        }
    }

    public void MountObject(string name)
    {
        if (nameMap.ContainsKey(name))
        {
            MountObject(nameMap[name]);
        }
        else
        {
            if (Debug.isDebugBuild)
                Debug.LogWarning(name + " not found in list!");
        }
    }

    public void MountObject(int index)
    {
        if (_umaData == null)
            _umaData = gameObject.GetComponent<UMAData>();

        if (!IsValid())
            return;

        GameObject boneObj = null;

        boneObj = _umaData.GetBoneGameObject(mountInfos[index].boneName);

        if (boneObj == null)
            return;

        Transform objTransform = boneObj.transform.Find(mountInfos[index].objPrefab.name);
        if (objTransform == null)
        {
            GameObject newObj = GameObject.Instantiate(mountInfos[index].objPrefab);
            newObj.name = mountInfos[index].objPrefab.name;
            newObj.transform.SetParent(boneObj.transform, false);
            newObj.transform.localPosition = mountInfos[index].position;
            newObj.transform.localRotation = Quaternion.Euler(mountInfos[index].rotation);
            newObj.transform.localScale = mountInfos[index].scale;
        }
        else
        {
            objTransform.gameObject.SetActive(true);
        }
    }

    public void UnMountObject(string name)
    {
        if (nameMap.ContainsKey(name))
        {
            UnMountObject(nameMap[name]);
        }
        else
        {
            if (Debug.isDebugBuild)
                Debug.LogWarning(name + " not found in list!");
        }
    }

    public void UnMountObject(int index)
    {
        if (_umaData == null)
            _umaData = gameObject.GetComponent<UMAData>();

        if (!IsValid())
            return;

        GameObject boneObj = _umaData.GetBoneGameObject(mountInfos[index].boneName);

        if (boneObj == null)
            return;

        Transform objTransform = boneObj.transform.Find(mountInfos[index].objPrefab.name);
        if (objTransform != null)
        {
            objTransform.gameObject.SetActive(false);
        }
    }
}