using Unity.VisualScripting;
using UnityEngine;

public class FirstPersonController : MonoBehaviour
{
    [Header("Movement Settings")]
    public float walkSpeed = 50f;  // Boosted from 8f to overcome collision issues
    public float runSpeed = 80f;   // Boosted from 14f
    public float jumpHeight = 2.5f;
    public float gravity = -20f;

    [Header("Mouse Look Settings")]
    public float mouseSensitivity = 3f;
    public float maxLookAngle = 90f;

    [Header("References")]
    public Camera playerCamera;

    // Private variables
    private CharacterController controller;
    private Vector3 velocity;
    private bool isGrounded;
    private float xRotation = 0f;

    void Start()
    {
        Debug.Log("Starting game");

        // FORCE NORMAL TIME (in case something external changed it)
        Time.timeScale = 1f;

        controller = GetComponent<CharacterController>();

        if (controller == null)
        {
            Debug.LogError("FirstPersonController: No CharacterController found!");
            return;
        }

        if (playerCamera == null)
            playerCamera = GetComponentInChildren<Camera>();

        Cursor.lockState = CursorLockMode.Locked;
        Cursor.visible = false;
    }

    void Update()
    {
        if( controller == null )
            return;

        isGrounded = controller.isGrounded;

        if (isGrounded && velocity.y < 0)
            velocity.y = -2f;

        // ─── Movement via direct KeyCode ───
        float moveX = 0f;
        float moveZ = 0f;

        if (Input.GetKey(KeyCode.W) || Input.GetKey(KeyCode.UpArrow)) moveZ += 1f;
        if (Input.GetKey(KeyCode.S) || Input.GetKey(KeyCode.DownArrow)) moveZ -= 1f;
        if (Input.GetKey(KeyCode.A) || Input.GetKey(KeyCode.LeftArrow)) moveX -= 1f;
        if (Input.GetKey(KeyCode.D) || Input.GetKey(KeyCode.RightArrow)) moveX += 1f;

        // DEBUG: Log once when W is first pressed
        if (Input.GetKeyDown(KeyCode.W))
        {
            Debug.Log($"[FPC DEBUG] W pressed | controller.enabled={controller.enabled} | position={transform.position} | isGrounded={isGrounded}");
            Debug.Log($"[FPC DEBUG] Time.timeScale={Time.timeScale} | Time.deltaTime={Time.deltaTime} | walkSpeed={walkSpeed}");
        }

        Vector3 move = transform.right * moveX + transform.forward * moveZ;

        if (move.magnitude > 1f)
            move.Normalize();

        float currentSpeed = Input.GetKey(KeyCode.LeftShift) ? runSpeed : walkSpeed;

        Vector3 posBefore = transform.position;
        controller.Move(move * currentSpeed * Time.deltaTime);

        // DEBUG: Log if we tried to move but didn't
        if (move.magnitude > 0f && Input.GetKeyDown(KeyCode.W))
        {
            Vector3 posAfter = transform.position;
            //Debug.Log($"[FPC DEBUG] Move attempt: delta={move * currentSpeed * Time.deltaTime} | actualDelta={(posAfter - posBefore)} | controller.height={controller.height} | controller.radius={controller.radius}");

            // Check what we're colliding with
            Collider[] nearbyColliders = Physics.OverlapSphere(transform.position, controller.radius + 0.5f);
            //Debug.Log($"[FPC DEBUG] Found {nearbyColliders.Length} colliders near player");
            foreach (Collider col in nearbyColliders)
            {
                if (col != controller && !(col is CharacterController))
                    Debug.LogWarning($"[FPC DEBUG] Nearby collider: {col.gameObject.name} on layer {LayerMask.LayerToName(col.gameObject.layer)}");
            }
        }

        // Jumping
        if (Input.GetKey(KeyCode.Space) && isGrounded)
            velocity.y = Mathf.Sqrt(jumpHeight * -2f * gravity);

        // Gravity
        velocity.y += gravity * Time.deltaTime;
        controller.Move(velocity * Time.deltaTime);

        // Mouse look
        HandleMouseLook();

        // Escape to unlock cursor
        if (Input.GetKeyDown(KeyCode.Escape))
        {
            Cursor.lockState = CursorLockMode.None;
            Cursor.visible = true;
        }

        // Click to re-lock cursor
        if (Input.GetMouseButtonDown(0) && Cursor.lockState == CursorLockMode.None)
        {
            Cursor.lockState = CursorLockMode.Locked;
            Cursor.visible = false;
        }
    }

    void HandleMouseLook()
    {
        float mouseX = Input.GetAxis("Mouse X") * mouseSensitivity;
        float mouseY = Input.GetAxis("Mouse Y") * mouseSensitivity;

        xRotation -= mouseY;
        xRotation = Mathf.Clamp(xRotation, -maxLookAngle, maxLookAngle);
        playerCamera.transform.localRotation = Quaternion.Euler(xRotation, 0f, 0f);

        transform.Rotate(Vector3.up * mouseX);
    }
}