using System.Collections;
using UnityEngine;
using UnityEngine.Rendering.Universal;
using UnityEngine.UI;

// Handle room and scene transitions
public class TeleportHandler : MonoBehaviour
{
    public Image blackScreenObject;
    PlayerController playerController;

    private void Start()
    {
        playerController = GetComponent<PlayerController>();
    }

    /// <summary>
    /// Triggers the room entrance coroutine, only works if the character is not controllable (keeps from double transitioning)
    /// </summary>
    public void EnterRoom(RoomDoor door)
    {
        if (playerController.GetCharacterHasControl())
            StartCoroutine(EnterRoomCoroutine(door));
    }

    /// <summary>
    /// Handle teleportation and timing for entering rooms within a scene
    /// </summary>
    IEnumerator EnterRoomCoroutine(RoomDoor door)
    {
        float fadeDuration = 0.2f;
        float fadeTime = 0;
        Color blackScreenColor = Color.black;

        playerController.SetCharacterControl(false);
        // Play enter room animation (wait seconds during animation)
        if (door.requiresInteraction)
            yield return new WaitForSeconds(0.2f);

        blackScreenObject.gameObject.SetActive(true);
        while (fadeTime < fadeDuration)
        {
            blackScreenColor.a = Mathf.Lerp(0, 1, fadeTime / fadeDuration);
            blackScreenObject.color = blackScreenColor;
            fadeTime += Time.deltaTime;
            yield return null;
        }
        fadeTime = 0;

        transform.position = door.linkedDoor.transform.position;
        playerController.DougBody.transform.rotation = door.linkedDoor.transform.rotation;

        while (fadeTime < fadeDuration)
        {
            blackScreenColor.a = Mathf.Lerp(1, 0, fadeTime / fadeDuration);
            blackScreenObject.color = blackScreenColor;
            fadeTime += Time.deltaTime;
            yield return null;
        }
        fadeTime = 0;

        blackScreenObject.gameObject.SetActive(false);

        // Play exit animation for linked door (if it exists)
        door.linkedDoor.CloseDoor();
        yield return new WaitForSeconds(0.2f);
        playerController.SetCharacterControl(true);
    }

}