//============= Copyright (c) Ludic GmbH, All rights reserved. ==============
//
// Purpose: Part of the My Behaviour Tree Code
//
//=============================================================================

using System;
using System.Reflection;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.Globalization;

namespace MyBT {
    [System.Serializable]
    public class TaskParameterGroup : ScriptableObject {
        [SerializeField]
        List<TaskParameter> taskParameters;

        public TaskParameterGroup() {
            taskParameters = new List<TaskParameter>();
        }

        public void Init (MemberInfo memberInfo) {
            MethodInfo methodInfo = (MethodInfo)memberInfo;
            if (methodInfo != null) {
                taskParameters = new List<TaskParameter>();
                ParameterInfo[] parameterInfos = methodInfo.GetParameters();
                foreach (ParameterInfo parameterInfo in parameterInfos) {
                    // TaskParameter taskParm = new TaskParameter() { valType = Type.GetTypeCode(parameterInfo.ParameterType) };
                    TaskParameter taskParm = ScriptableObject.CreateInstance<TaskParameter>();
                    taskParm.valType = Type.GetTypeCode(parameterInfo.ParameterType);
                    taskParameters.Add(taskParm);
                }
            }
            else {
                Debug.LogError("TaskParameter.TaskParameterGroup: methodInfo is null");
            }
        }

        public TaskParameterGroup Duplicate () {
            TaskParameterGroup tpg = ScriptableObject.CreateInstance<TaskParameterGroup>();
            foreach (TaskParameter tp in taskParameters) {
                TaskParameter tpCopy = tp.Duplicate();
                tpg.taskParameters.Add(tpCopy);
            }
            // tpg.Init(memberInfo);
            return tpg;
        }

        public void Add(TaskParameter taskParameter) {
            taskParameters.Add(taskParameter);
        }

        public List<TaskParameter> GetAll() {
            return taskParameters;
        }

        public TaskParameter this[int index] {
            get {
                if ((0 <= index) && (index < taskParameters.Count)) {
                    return taskParameters[index];
                }
                return null;
            }
        }

        public int Count {
            get {
                return taskParameters.Count;
            }
        }

        /// mostly for viewing in unity editor
        public string cachedString = "";
        public override string ToString() {
            List<string> taskParmStrs = new List<string>();
            foreach (TaskParameter taskParm in taskParameters) {
                taskParmStrs.Add($"{taskParm.valValue} ({taskParm.valType.ToString()})");
            }
            cachedString = string.Join(",", taskParmStrs);
            //Debug.Log("TaskParameterGroup.ToString: " + cachedString + " (" + taskParameters.Count + ")");
            return cachedString;
        }

        public bool CheckCompatiblity(TaskParameterGroup taskParameterGroup) {
            // only allow same count of parameters
            if (this.Count != taskParameterGroup.Count)
                return false;
            //TaskParameterGroup parms = parameters;
            bool canConvert = true;
            // check wether the taskParameters can be converted to the parameters
            for (int i = 0; i < taskParameterGroup.Count; i++) {
                TaskParameter simpleValue = taskParameterGroup[i];
                TaskParameter complexValue = this[i];

                switch (simpleValue.valType) {
                    case TypeCode.DBNull:
                        // FAIL, invalid value
                        break;
                    case TypeCode.Boolean:
                        if ((new List<TypeCode> { TypeCode.Boolean, TypeCode.Int32, TypeCode.Single }).Contains(complexValue.valType)) {
                            // pass
                        }
                        else {
                            canConvert = false;
                        }
                        break;
                    case TypeCode.Int32:
                        // can be integer, or an enum
                        if ((new List<TypeCode> { TypeCode.Int32, TypeCode.Single }).Contains(complexValue.valType)) {
                            // pass
                        }
                        else {
                            canConvert = false;
                        }
                        break;
                    case TypeCode.Single:
                        if ((new List<TypeCode> { TypeCode.Single }).Contains(complexValue.valType)) {
                            // pass
                        }
                        else {
                            canConvert = false;
                        }
                        break;
                    case TypeCode.Empty:

                        break;
                    case TypeCode.String:
                        if ((new List<TypeCode> { TypeCode.String }).Contains(complexValue.valType)) {
                            // pass
                        }
                        else {
                            canConvert = false;
                        }
                        break;
                }

            }
            return canConvert;
        }
    }
}