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

public class QuestUINew : MonoBehaviour
{
    public bool Opened = true;

    [Tooltip("The Text component holding the quest's name.")]
    public Text Name;
    [Tooltip("The window that contains all the tasks and their holder.")]
    public RectTransform TasksWindow;
    [Tooltip("The parent of the tasks, should have ContentSizeFitter to fit all the tasks inside it.")]
    public RectTransform TasksHolder;

    [Tooltip("The prefab of the task template to be instatiated and edited for each task inside this quest.")]
    public GameObject TaskTemplate;

    [Tooltip("The name of the quest.")]
    public string QuestName;
    private string QuestDescription;

    [Header("Settings")]
    [Tooltip("The time in seconds the window will take to open/close.")]
    public float SwitchingDuration = 0.5f;

    private IEnumerator switchingEnum;
    public List<TaskUINew> tasksUI = new List<TaskUINew>();

    void Start()
    {

        if (Opened)
        {
            //Make sure the UI is set to opened state
            TasksWindow.offsetMin = TasksHolder.offsetMin;
            TasksWindow.offsetMax = TasksHolder.offsetMax;
        }
        else
        {
            //Make sure the UI is set to closed state
            TasksWindow.offsetMin = new Vector2(0, 0);
            TasksWindow.offsetMax = new Vector2(0, 0);
        }
    }

    /// <summary>
    /// Update quest's UI with the it's data.
    /// </summary>
    public void Init(Quest quest,int index)
    {
        StartCoroutine(Initializing(quest,index));
    }

    IEnumerator Initializing(Quest quest,int index)
    {
        QuestName = quest.id;
        QuestDescription = quest.Description;
        Name.text = QuestDescription;

        for (int i = 0; i < quest.tasks.Length; i++)
        {
            GameObject t = Instantiate(TaskTemplate, TasksHolder);
            TaskUINew tUI = t.GetComponent<TaskUINew>();

            tasksUI.Add(tUI);
        }

        //Wait for half a second before changing size to TasksHolder (because it takes few frames for the two ContentSizeFitters used to adapt to the missions size).
        yield return new WaitForSeconds(0.25f);

        Open();

        yield break;
    }

    public void SwitchState()
    {
        if (Opened)
        {
            Close();
        }
        else
        {
            Open();
        }

    }
    public void Open()
    {
        if (switchingEnum != null)
        {
            StopCoroutine(switchingEnum);
        }

        switchingEnum = SwitchAnimation(true);

        StartCoroutine(switchingEnum);

        Opened = true;
    }

    public void Close()
    {
        if (switchingEnum != null)
        {
            StopCoroutine(switchingEnum);
        }

        switchingEnum = SwitchAnimation(false);

        StartCoroutine(switchingEnum);

        Opened = false;
    }

    IEnumerator SwitchAnimation(bool open)
    {
        float startTime = Time.time;
        Vector2 startOffsetMin = TasksWindow.offsetMin;
        Vector2 startOffsetMax = TasksWindow.offsetMax;

        Vector2 wantedOffsetMin = open ? TasksHolder.offsetMin : new Vector2(0, 0); ;
        Vector2 wantedOffsetMax = open ? TasksHolder.offsetMax : new Vector2(0, 0); ;

        while (Time.time < startTime + SwitchingDuration + 1)
        {
            float t = (Time.time - startTime) / SwitchingDuration;

            wantedOffsetMin = open ? TasksHolder.offsetMin : new Vector2(0, 0); ;
            wantedOffsetMax = open ? TasksHolder.offsetMax : new Vector2(0, 0); ;

            TasksWindow.offsetMin = Vector2.Lerp(startOffsetMin, wantedOffsetMin, t);
            TasksWindow.offsetMax = Vector2.Lerp(startOffsetMax, wantedOffsetMax, t);

            yield return null;
        }

        wantedOffsetMin = open ? TasksHolder.offsetMin : new Vector2(0, 0); ;
        wantedOffsetMax = open ? TasksHolder.offsetMax : new Vector2(0, 0); ;
        TasksWindow.offsetMin = wantedOffsetMin;
        TasksWindow.offsetMax = wantedOffsetMax;

        GetComponent<UIElement>().MovementSection.startVectorValue = GetComponent<RectTransform>().position;
    }

    public void CheckTask(int index)
    {
        if (index == tasksUI.Count - 1)
        {
            Invoke("Hide", 1);
        }
    }

    public void Hide()
    {
        Close();
        GetComponent<UIElement>().ChangeVisibility(false);

        Invoke("Remove", 0.5f);
    }

    private void Remove()
    {
        InGameNotificationManager.Instance.PopNotification("Quest Completed!", QuestDescription);

        Destroy(gameObject);
    }
}