using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using TMPro;
using System;
using Lemon.GenericLib.Generics;

//note
//dialouge cannot be started in the start() call because it needs to wait for events
namespace Lemon.GenericLib.Dialogue
{
    public class DialogueSystem : MonoBehaviour
    {
        [Header("dialogue configs")]
        [SerializeField] private string[] dialougeTexts;
        [SerializeField] private TextMeshProUGUI dialogueTextFeild;
        [SerializeField] private static float typingSpeed = 50f;
        private static float defaultTypingSpeed;
        [SerializeField] Optional<string> interuptInput;
        [SerializeField] Optional<string> advancingInput;
        [SerializeField] private bool canUseExternalControls = true;
        [SerializeField] public Color defaulrColour;

        [Space]
        [Header("timing configs")]
        [SerializeField] private bool startImmediantly;
        [SerializeField] public float startDelay;
        [SerializeField] public float endDelay;

        [Space]
        [Header("command parsing configs")]
        [SerializeField] private char commandPrefix;
        [SerializeField] private bool skipEmpty;
        [SerializeField] private char[] ignorePrefix;

        [Space]
        [Header("extra config ")]
        [SerializeField] Optional<GameObject> continueButton;

        public int SceneIndex;


        public Action<string> dialogueCommandEvents;
        public Action dialogueLineEvent;
        public Action endDialougeEvents;
        public Action dialogueStartEvents;

        public Action initDialogueEvents;
        public Action requiredEndEvent;

        private int currentDialougeIndex = 0;
        private bool isInterupt = false;
        private bool isTyping = false;
        public float waitTime = 0f;
        public static bool doneSkipping = false;
        //public DialogueLogger dialogueLogger;


        // Start is called before the first frame update
        IEnumerator Start()
        {
            dialogueTextFeild.text = "";
            if (continueButton.Enabled)
            {
                continueButton.Value.SetActive(false);
            }

            //dialougeLineEvent += TestEvent;

            if (startImmediantly)
            {
                yield return new WaitForSeconds(0.5f);
                StartCoroutine(StartDialogueRoutine());
            }

            defaultTypingSpeed = typingSpeed;
        }

        // Update is called once per frame
        void Update()
        {
            if (!canUseExternalControls) return;

            HandleInputs();
        }

        bool isInputInterupt = false;
        private void HandleInputs()
        {
            if (interuptInput.Enabled && isTyping)
            {
                if (Input.GetButtonDown(interuptInput.Value))
                {
                    //AudioManager2D.audioManager2DInstance.Play("UIClick");
                    if (!isInterupt)
                    {
                        isInterupt = true;
                    }
                    return;
                }
            }

            if (advancingInput.Enabled)
            {
                if (Input.GetButtonDown(advancingInput.Value))
                {
                    //AudioManager2D.audioManager2DInstance.Play("UIClick");
                    if (!isTyping)
                    {
                        //Debug.Log(isTyping);
                        AdvanceDialogue();
                    }
                    //else if (!isInterupt){
                    //    isInputInterupt = true;
                    //    isInterupt = true;
                    //    StartCoroutine(resetInterupt());
                    //}
                    return;
                }
            }
        }

        public void LoadDialouge(string[] dialoguesToLoad, bool startImmediantly = true)
        {

            dialougeTexts = dialoguesToLoad;
            dialogueStartEvents = null;
            //endDialougeEvents = null;
            if (startImmediantly)
            {
                StartDialogue();
            }
        }

        public void StartDialogue()
        {
            if (dialougeTexts == null) return;
            //AudioManager2D.audioManager2DInstance.Play("PageFlipSound");
            StartCoroutine(StartDialogueRoutine());
        }

        IEnumerator StartDialogueRoutine()
        {
            initDialogueEvents?.Invoke();
            dialogueTextFeild.color = defaulrColour;
            yield return new WaitForSeconds(startDelay);
            dialogueStartEvents?.Invoke();

            currentDialougeIndex = 0;
            TypeDialouge();
        }

        public void AdvanceDialogue()
        {
            //AudioManager2D.audioManager2DInstance.Play("ButtonSound");
            if (!canUseExternalControls) return;
            StopCoroutine("TypeDialougeRoutine");
            if (dialougeTexts == null) return;

            if (continueButton.Enabled)
            {
                continueButton.Value.SetActive(false);
            }


            currentDialougeIndex++;
            Debug.LogWarning(currentDialougeIndex + ", " + dialougeTexts.Length);
            if (currentDialougeIndex < dialougeTexts.Length)
            {
                TypeDialouge(dialougeTexts[currentDialougeIndex]);
            }
            else
            {

                if (continueButton.Enabled)
                {
                    continueButton.Value.SetActive(false);
                }

                StartCoroutine(EndDialogueRoutine());
            }
        }

        public void SkipDialogue()
        {
            //isInterupt = true;
            //currentDialougeIndex = dialougeTexts.Length;
            //currentDialougeIndex++;
            if (continueButton.Enabled)
            {
                continueButton.Value.SetActive(false);
            }
            AdvanceDialogue();
        }

        IEnumerator EndDialogueRoutine()
        {
            if (continueButton.Enabled)
            {
                continueButton.Value.SetActive(false);
            }

            requiredEndEvent?.Invoke();
            dialogueTextFeild.text = "";
            yield return new WaitForSeconds(endDelay);

            //fire events
            //endDialougeEvents?.Invoke();
            //FindObjectOfType<SceneTransition>().GoToScene(SceneIndex);
        }

        public void SkipDialougeTyping()
        {
            StopCoroutine("TypeDialougeRoutine");
            dialogueTextFeild.text = "";
            AdvanceDialogue();
        }

        public void TypeDialouge()
        {
            StopCoroutine("typeDialougeRoutine");
            StartCoroutine(TypeDialougeRoutine(dialougeTexts[currentDialougeIndex]));
        }

        public void TypeDialouge(string dialougeToType)
        {
            StopCoroutine("typeDialougeRoutine");
            StartCoroutine(TypeDialougeRoutine(dialougeToType));
        }

        public void InteruptDialouge()
        {
            isInterupt = true;
        }


        public void SetStartEvents(Action[] events)
        {
            dialogueStartEvents = null;
            foreach (var item in events)
            {
                dialogueStartEvents += item;
            }

        }

        public void SetEndEvents(Action[] events)
        {

            endDialougeEvents = null;
            foreach (var item in events)
            {
                endDialougeEvents += item;
            }

        }

        //create a wait time vaiable that is public

        IEnumerator TypeDialougeRoutine(string dialougeToType)
        {


            float t = 0;
            int charIndex = 0;
            isInterupt = false;

            isTyping = true;

            if (continueButton.Enabled)
            {
                continueButton.Value.SetActive(false);
            }

            Debug.Log(dialougeToType);
            if (skipEmpty && (string.IsNullOrWhiteSpace(dialougeToType)))
            {
                SkipDialougeTyping();
            }
            else
            {



                dialogueCommandEvents?.Invoke(dialougeToType);
                //make sure you can change wait time here woth the command fucntion



                bool isSkipPrefix = false;

                for (int i = 0; i < ignorePrefix.Length; i++)
                {
                    if (dialougeToType[0].Equals(ignorePrefix[i]))
                    {
                        isSkipPrefix = true;
                    }
                }

                //Honestly have no idea where to put the wait so
                if (waitTime > 0)
                {
                    yield return new WaitForSeconds(waitTime);
                }
                waitTime = 0;

                Debug.Log($"shoud skip?: { dialougeToType[0] } {isSkipPrefix} ");
                doneSkipping = false;
                if (dialougeToType[0].Equals(commandPrefix) || isSkipPrefix)
                {
                    //wait even if wait time is 0
                    //reset wait time after wait
                    SkipDialougeTyping();
                }
                else
                {
                    //dialougeToType = dialougeTextEffects.UpdateText(dialougeToType);
                    dialogueTextFeild.text = dialougeToType;

                    //dialougeTextEffects.UpdateText(dialougeToType);

                    //typing effect
                    while (charIndex < dialougeToType.Length)
                    {
                        isTyping = true;
                        //for whatever reason this needs to be in the loop to not show
                        if (continueButton.Enabled)
                        {
                            continueButton.Value.SetActive(false);
                        }

                        if (isInterupt)
                        {
                            charIndex = dialougeToType.Length;
                        }
                        else
                        {
                            t += Time.deltaTime * typingSpeed;
                            charIndex = Mathf.FloorToInt(t);
                            charIndex = Mathf.Clamp(charIndex, 0, dialougeToType.Length);
                        }

                        //process here

                        dialogueTextFeild.maxVisibleCharacters = charIndex;
                        //dialogueTextFeild.text = dialougeToType.Substring(0, charIndex);

                        yield return null;
                    }
                    doneSkipping = true;

                    //dialogueLogger.AddToLog(dialougeToType, false, false);

                    //dialogueTextFeild.text = dialougeToType;


                }
            }


            isTyping = false;

            //Fixes for continue button appearing when holding down skip
            if (continueButton.Enabled)
            {
                if (doneSkipping == false)
                {
                    continueButton.Value.SetActive(false);
                }
                else
                {
                    continueButton.Value.SetActive(true);
                }
            }
        }

        IEnumerator resetInterupt()
        {
            yield return null;
            isInputInterupt = false;

        }

        public void TestEvent(string testString)
        {

            Debug.Log(testString);
            Debug.Log("Event is working as intended");
        }

        public static void setTypingSpeed(int newValue)
        {
            typingSpeed = newValue;
        }

        public static void setDefaultTypingSpeed()
        {
            typingSpeed = defaultTypingSpeed;
        }

    }

}