using UnityEngine;
using System;
using System.Collections;
using Pathfinding;

public class AnneLiseBehaviour : MonoBehaviour
{
    [SerializeField] public float moveSpeed;
    private Animator animator;
    private AIPath aiPath;
    private bool hasArrived = false;
    private LureSpot currentLureSpot;
    private SpriteRenderer spriteRenderer; // Cached reference
    private bool allowFacingByVelocity = true; // New flag
    private Coroutine walkingCoroutine;
    private bool annaLiseIsReady = false; // Flag to know if Anna Lise is ready to take the picture

    private void Awake()
    {
        animator = GetComponentInChildren<Animator>();
        aiPath = GetComponent<AIPath>();
        spriteRenderer = GetComponentInChildren<SpriteRenderer>(); // Cache the reference
        if (aiPath != null)
        {
            aiPath.maxSpeed = moveSpeed;
            aiPath.OnTargetReachedEvent += HandleArriveAtSpot;
        }
    }

    private void OnDestroy()
    {
        if (aiPath != null)
        {
            aiPath.OnTargetReachedEvent -= HandleArriveAtSpot;
        }
    }

    public void TeleportJustOutOfView(Camera cam, float offset = 2f)
    {
        if (aiPath == null || cam == null || currentLureSpot == null || currentLureSpot.annaLiseSpot == null) return;

        // Calculate direction from the target spot to Anna Lise's current position
        Vector3 from = currentLureSpot.annaLiseSpot.transform.position;
        Vector3 to = transform.position;
        Vector3 direction = (to - from).normalized;

        // Project the target spot to screen space
        Vector3 targetScreen = cam.WorldToScreenPoint(from);

        // Find the screen edge in the direction
        Vector2 dir2D = new Vector2(direction.x, direction.y);
        if (dir2D == Vector2.zero) dir2D = Vector2.right; // fallback
        dir2D.Normalize();

        // Calculate intersection with screen bounds
        float tX = dir2D.x > 0 ? (Screen.width - targetScreen.x) / dir2D.x : (0 - targetScreen.x) / dir2D.x;
        float tY = dir2D.y > 0 ? (Screen.height - targetScreen.y) / dir2D.y : (0 - targetScreen.y) / dir2D.y;
        float t = Mathf.Min(Mathf.Abs(tX), Mathf.Abs(tY));
        Vector2 edgeScreen = new Vector2(targetScreen.x, targetScreen.y) + dir2D * t;
        edgeScreen += dir2D * offset; // Move outside the screen by offset

        // Convert back to world position
        Vector3 teleportWorld = cam.ScreenToWorldPoint(new Vector3(edgeScreen.x, edgeScreen.y, cam.WorldToScreenPoint(from).z));
        teleportWorld.z = transform.position.z; // Keep original Z

        aiPath.Teleport(teleportWorld, true);
    }

    public void GotoSpot(GameObject lurespot)
    {
        currentLureSpot = lurespot.GetComponent<LureSpot>();
        // Teleport Anna Lise just out of view before moving
        TeleportJustOutOfView(Camera.main, 2f);

        if (aiPath == null) return;

        aiPath.destination = currentLureSpot.annaLiseSpot.transform.position;
        aiPath.canMove = true;
        aiPath.SearchPath();
        hasArrived = false;
        allowFacingByVelocity = true;
        if (walkingCoroutine != null)
        {
            StopCoroutine(walkingCoroutine);
        }
        walkingCoroutine = StartCoroutine(UpdateSpeedWhenWalking());
    }

    private IEnumerator UpdateSpeedWhenWalking()
    {
        while (!hasArrived && aiPath != null && animator != null)
        {
            float currentSpeed = aiPath.velocity.magnitude;
            animator.SetFloat("speed", currentSpeed);

            // Only allow facing by velocity if not arrived
            if (allowFacingByVelocity && currentSpeed > 0.01f && spriteRenderer != null)
            {
                Vector3 velocity = aiPath.velocity;
                if (velocity.x != 0)
                {
                    Vector3 scale = spriteRenderer.transform.localScale;
                    scale.x = Mathf.Abs(scale.x) * (velocity.x > 0 ? 1 : -1);
                    spriteRenderer.transform.localScale = scale;
                }
            }
            yield return null;
        }
    }

    private void HandleArriveAtSpot()
    {
        if (hasArrived) return;
        hasArrived = true;
        allowFacingByVelocity = false; // Disable facing by velocity after arrival
        aiPath.canMove = false;
        if (walkingCoroutine != null)
        {
            StopCoroutine(walkingCoroutine);
            walkingCoroutine = null;
        }
        // Face the "luredBird" of the current lurespot, if available
        if (currentLureSpot != null)
        {
            if (currentLureSpot.luredBird != null)
            {
                FaceTarget(currentLureSpot.luredBird);
                annaLiseIsReady = true; // Now Anna Lise is ready to take the picture
            }
        }

        if (animator != null && currentLureSpot.name != "LureSpotB")// Horrible way to not take the photo if its Wolter
        { 
            animator.SetTrigger("TakePhoto");
            annaLiseIsReady = false; // Reset the flag after taking the photo   
        }
        animator.SetFloat("speed", 0);
    }

    public void FaceTarget(GameObject target)
    {
        if (target == null || spriteRenderer == null) return;

        // Compare X positions to determine facing direction
        float direction = target.transform.position.x - transform.position.x;
        if (Mathf.Abs(direction) > 0.01f) // Avoid flipping if almost aligned
        {
            Vector3 scale = spriteRenderer.transform.localScale;
            scale.x = Mathf.Abs(scale.x) * (direction > 0 ? 1 : -1);
            spriteRenderer.transform.localScale = scale;
        }
    }
    public void TrafalgarTouchedAnnaLise()
    {
        if (annaLiseIsReady == true && currentLureSpot.name == "LureSpotB") // Only allow if Anna Lise is ready and it's the correct lure spot
        {
            // Trigger the photo taken animation
            if (animator != null)
            {
                currentLureSpot.GetComponentInChildren<BirdEyesBehavior>().BirdReveal();
                animator.SetTrigger("TakePhoto");
            }
            annaLiseIsReady = false; // Reset the flag after taking the photo
        }
        Debug.Log("Trafalgar touched Anna Lise");
    }
}