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

public class BasicLevelProgressionSystem : MonoBehaviour
{
    //Fire1 is click or A
    //Place is F or "Y" button
    //Cycle is Tab or RB
    //Siwtch is Shift or "X"
    public enum InputType
    {
        FIRE1,
        PLACE,
        CYCLE,
        SWITCH,
        COLLISION,
        LOCATION,
        AIM,
        EXTERNAL
    }

    [SerializeField] private UI.ObjectiveText objectiveGui;

    [SerializeField] private UI.WaypointMarker marker;

    [SerializeField] private Player.PlayerComponent player;
    //[SerializeField]
    //private float minDist = 3;

    [SerializeField] private List<ProgressionSection> sections;

    private int progress;
    private bool transitioning;
    public List<ProgressionSection> Sections => sections;

    // Start is called before the first frame update
    private void Start()
    {
    }

    // Update is called once per frame
    private void Update()
    {
        var cur = getCurrent().getActive();
        if (cur != null)
        {
            if (!getCurrent().objectiveOneMet)
            {
                marker.target = cur;
                objectiveGui.visualObjects[0].text.text = getCurrent().instruction1;
                objectiveGui.visualObjects[1].text.text = getCurrent().istruction2;
            }
            else if (!getCurrent().objectiveTwoMet)
            {
                marker.target = cur;
            }
        }

        if (Input.GetButtonDown("Fire1") || (Input.GetAxis("Fire1") > 0.5f && !transitioning))
            ProgressCurrentIfInput(InputType.FIRE1);
        if (Input.GetButtonDown("TempPlace")) ProgressCurrentIfInput(InputType.PLACE);
        if (Input.GetButtonDown("CycleItems")) ProgressCurrentIfInput(InputType.CYCLE);
        if (Input.GetButtonDown("Fire3")) ProgressCurrentIfInput(InputType.SWITCH);
        if (Input.GetAxis("Aim") > .5f || Input.GetButtonDown("Aim"))
            if (!transitioning)
                ProgressCurrentIfInput(InputType.AIM);

        if (Vector3.Distance(player.transform.position, getCurrent().getActive().position) < 3)
        {
            var canIterate = getCurrent().Iterate();
            if (!canIterate)
            {
                if (!getCurrent().objectiveOneMet && getCurrent().conditionalOne == InputType.LOCATION)
                    OnePassed();
                else if (getCurrent().objectiveOneMet && getCurrent().conditionalTwo == InputType.LOCATION &&
                         !getCurrent().objectiveTwoMet) TwoPassed();
            }
        }
    }

    private void OnTriggerEnter(Collider other)
    {
        if (other.gameObject.GetComponentInParent<Player.PlayerComponent>() != null) ProgressCurrentIfCollide();
    }

    private void ProgressCurrentIfCollide()
    {
    }

    private void OnePassed()
    {
        getCurrent().objectiveOneMet = true;
        getCurrent().Progress();

        objectiveGui.visualObjects[0].isComplete = true;
    }

    public void TwoPassed()
    {
        if (transitioning) return;
        getCurrent().objectiveTwoMet = true;
        objectiveGui.visualObjects[1].isComplete = true;
        objectiveGui.FadeOut();
        transitioning = true;
        StartCoroutine(waitForFadeIn());
    }

    public void ProgressCurrentIfInput(InputType type)
    {
        if (getCurrent().AtEnd() && getCurrent().conditionalOne == type && !getCurrent().objectiveOneMet)
            OnePassed();
        else if (getCurrent().AtEnd() && getCurrent().conditionalTwo == type) TwoPassed();
    }

    public ProgressionSection getCurrent()
    {
        return sections[progress];
    }

    private IEnumerator waitForFadeIn()
    {
        yield return new WaitForSeconds(3);
        if (sections.Count > progress + 1)
        {
            progress++;
            objectiveGui.FadeIn();
            objectiveGui.visualObjects[0].isComplete = false;
            objectiveGui.visualObjects[1].isComplete = false;
        }

        transitioning = false;
    }
}


[Serializable]
public class ProgressionSection
{
    [SerializeField] public string instruction1;

    [SerializeField] public string istruction2;

    [SerializeField] public bool objectiveOneMet;

    [SerializeField] public BasicLevelProgressionSystem.InputType conditionalOne;

    [SerializeField] public bool objectiveTwoMet;

    [SerializeField] public BasicLevelProgressionSystem.InputType conditionalTwo;

    [SerializeField] public List<Transform> positionsOne = new();

    [SerializeField] public List<Transform> positionsTwo = new();

    [HideInInspector] public int activePosition;

    public Transform getActive()
    {
        if (!objectiveOneMet)
            return positionsOne[activePosition];
        return positionsTwo[activePosition];
    }

    public bool Iterate()
    {
        if (!objectiveOneMet && activePosition + 1 < positionsOne.Count)
        {
            activePosition += 1;
            return true;
        }

        if (objectiveOneMet && !objectiveTwoMet && activePosition + 1 < positionsTwo.Count)
        {
            activePosition += 1;
            return true;
        }

        return false;
    }

    public bool AtEnd()
    {
        if (!objectiveOneMet && activePosition + 1 < positionsOne.Count)
            return false;
        if (objectiveOneMet && !objectiveTwoMet && activePosition + 1 < positionsTwo.Count) return false;
        return true;
    }

    public void Progress()
    {
        activePosition = 0;
    }
}