using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Unity.MLAgents;
using Unity.Barracuda;
using Unity.MLAgents.Policies;
using System;
using Unity.Barracuda.ONNX;
using System.IO;
using System.Linq;

public class ModelSwap : MonoBehaviour
{
    // Models

    public NNModel m_InitialModel;
    // public Agent agent;

    public List<NNModel> nnModelList;
    [HideInInspector]
    public Walker agent;
    [HideInInspector] public int currentModel = 0;
    [HideInInspector] public string m_currentModelName = string.Empty;
    [HideInInspector] public string m_PastModel = string.Empty;

    // Path to .onnx files
    string m_relPath = string.Empty;

    private void OnEnable()
    {
        Waypoint.SwapModelOnWaypointReached += SwapModelOnReachingWaypoint;
        WaypointManager.OnOverrideWaypoint += SwitchModelOverride;
    }

    private void OnDisable()
    {
        Waypoint.SwapModelOnWaypointReached -= SwapModelOnReachingWaypoint;
        WaypointManager.OnOverrideWaypoint += SwitchModelOverride;
    }

    private void Start()
    {
        agent = this.GetComponent<Walker>();
    }

    // Set Model by name
    public void SwitchModel(string modelName, Agent inst)
    {
        FindModelByName(modelName);
        inst.SetModel("c_Walker", nnModelList[currentModel]);

        if (modelName.Equals("Walker"))
        {
            agent.m_SelectedBrain = Walker.Brain.Walker;
            m_currentModelName = modelName;
        }
        else if (modelName.Equals("Stairs"))
        {
            agent.m_SelectedBrain = Walker.Brain.DMScrambler;
            m_currentModelName = modelName;
        }
        else if (modelName.Equals("Climber"))
        {
            agent.m_SelectedBrain = Walker.Brain.Climber;
            m_currentModelName = modelName;
        }
        else if (modelName.Equals("Getup"))
        {
            agent.m_SelectedBrain = Walker.Brain.Getup;
            m_currentModelName = modelName;
        }

        Debug.Log("Current Model: " + nnModelList[currentModel].name);
    }

    private void FindModelByName(string modelName)
    {
        int i = 0;
        foreach (NNModel element in nnModelList)
        {
            if (element.name.Equals(modelName))
            {
                currentModel = i;
                return;
            }
            i++;
        }
    }

    private void SwapModelOnReachingWaypoint(string modelName)
    {
        SwitchModel(modelName, agent);
    }

    public void SetInitialModel()
    {
        SwitchModel(m_InitialModel.name, agent);
    }

    private void SwitchModelOverride(string modelName)
    {
        SwapModelOnReachingWaypoint(modelName);
    }
};