using System.Collections.Generic;
using UnityEngine;
using XRLib.UI;
using TMPro;
using UnityEngine.UI;
using System.Linq;
using System;

namespace XED
{

    public class UI_ComparisonSettingItem : UIBase
    {
        private TMP_Dropdown Dropdown_Comparison;
        private TMP_InputField InputField_Value;
        private Button Button_EventTarget;
        private TMP_Dropdown Dropdown_EventTarget;
        private Button Button_AddParameters;
        private RectTransform EventParametersContent;

        private List<UI_EventParameterItem> eventParameterItems = new List<UI_EventParameterItem>();
        private UI_EventParameterItem eventParameterItem;

        private List<string> comparisonOptions = new List<string> { ">", "<", ">=", "<=", "==", "!=" };
        private EventData eventData;
        private Dictionary<string, List<string>> eventTypes = new Dictionary<string, List<string>>();

        public Action onUpdateLayoutAddParameter;
        public Action onUpdateLayoutRemoveParameter;

        internal void SetItem(UI_EventParameterItem eventParameterItem, EventData eventData)
        {
            this.eventParameterItem = eventParameterItem;
            this.eventData = eventData;

            SetComparisonDropdown();
            SetEventTargetDropdown(eventData);
            Button_EventTarget.onClick.AddListener(OnClickEvnetTargetButton);
            Button_AddParameters.onClick.AddListener(OnClickAddParametersButton);
            eventParameterItems.Clear();
        }
        public void SetItem(ComparisonCondition loadData, UI_EventParameterItem eventParameterItem , EventData eventData)
        {
            this.eventParameterItem = eventParameterItem;
            this.eventData = eventData;

            SetComparisonDropdown();
            SetEventTargetDropdown(eventData);
            Button_EventTarget.onClick.AddListener(OnClickEvnetTargetButton);
            Button_AddParameters.onClick.AddListener(OnClickAddParametersButton);
            eventParameterItems.Clear();

            for(int i = 0; i < Dropdown_Comparison.options.Count; i++)
            {
                if(Dropdown_Comparison.options[i].text == loadData.comparisonOperator)
                {
                    Dropdown_Comparison.value = i;
                }
            }
            InputField_Value.text = loadData.value;

            for (int i = 0; i < Dropdown_EventTarget.options.Count; i++)
            {
                if (Dropdown_EventTarget.options[i].text == loadData.eventTarget)
                {
                    Dropdown_EventTarget.value = i;
                }
            }

            if (loadData.parameters.Count > 0)
            {
                foreach (var parameter in loadData.parameters)
                {
                    var item = Instantiate(eventParameterItem, EventParametersContent);
                    item.SetItem(parameter, eventTypes);
                    eventParameterItems.Add(item);

                    if (eventParameterItems.Count > 1)
                    {
                        UpdateLayoutAddParameter();
                    }
                }
            }
        }
        private void SetComparisonDropdown()
        {
            Dropdown_Comparison.ClearOptions();
            Dropdown_Comparison.AddOptions(comparisonOptions);
        }
        private void SetEventTargetDropdown(EventData eventData)
        {
            Dropdown_EventTarget.ClearOptions();
            Dropdown_EventTarget.AddOptions(eventData.eventTargets.Keys.ToList());

            Dropdown_EventTarget.onValueChanged.AddListener(OnEventTargetValueChanged);
            OnEventTargetValueChanged(0);
        }
        private void OnEventTargetValueChanged(int index)
        {
            string selectedTarget = Dropdown_EventTarget.options[index].text;
            if (!eventData.eventTargets.ContainsKey(selectedTarget)) 
                return;

            eventTypes = eventData.eventTargets[selectedTarget];

            for(int i = 0; i < eventParameterItems.Count-1; i++)
            {
                UpdateLayoutRemoveParameter();
            }

            foreach (var eventParameterItem in eventParameterItems)
            {
                Destroy(eventParameterItem.gameObject);
            }
            eventParameterItems.Clear();
        }

        private void OnClickEvnetTargetButton()
        {
            Dropdown_EventTarget.Show();
        }
        private void OnClickAddParametersButton()
        {
            var item = Instantiate(eventParameterItem, EventParametersContent);
            item.SetItem(eventTypes);
            eventParameterItems.Add(item);

            if (eventParameterItems.Count > 1)
            {
                UpdateLayoutAddParameter();
            }
        }
        private void UpdateLayoutAddParameter()
        {
            var height = rectTransform.sizeDelta;
            height.y += eventParameterItem.rectTransform.rect.height;

            rectTransform.sizeDelta = height;
            onUpdateLayoutAddParameter?.Invoke();
        }
        private void UpdateLayoutRemoveParameter()
        {
            var height = rectTransform.sizeDelta;
            height.y -= eventParameterItem.rectTransform.rect.height;

            rectTransform.sizeDelta = height;
            onUpdateLayoutRemoveParameter?.Invoke();
        }

        public ComparisonCondition GetComparisonData()
        {
            var comparisonCondition = new ComparisonCondition();
            comparisonCondition.comparisonOperator = Dropdown_Comparison.options[Dropdown_Comparison.value].text;
            comparisonCondition.value = InputField_Value.text;
            comparisonCondition.eventTarget = Dropdown_EventTarget.options[Dropdown_EventTarget.value].text;

            foreach (var item in eventParameterItems)
            {
                var parameters = item.GetParametersData();
                comparisonCondition.parameters.Add(parameters);
            }
            return comparisonCondition;
        }
    }
}