using System.Collections;
using UnityEngine;

public class CharacterMovement : MonoBehaviour
{
    public bool CanMove { get; private set; } = true;
    private bool isSprinting => canSprint && Input.GetKey(sprintKey);
    private bool ShouldJump => Input.GetKeyDown(jumpKey) && characterController.isGrounded;
    private bool ShouldCrouch => Input.GetKeyDown(crouchKey) && !duringCrouchAnim && characterController.isGrounded;

    [Header("Character Options")]
    [SerializeField] private bool canSprint = true;
    [SerializeField] private bool canJump = true;
    [SerializeField] private bool canCrouch = true;
    [SerializeField] private bool canHeadBob = true;
    [SerializeField] private bool canInteract = true;
    [SerializeField] private bool useFootsteps = true;

    [Header("Controls")]
    [SerializeField] private KeyCode sprintKey = KeyCode.LeftShift;
    [SerializeField] private KeyCode jumpKey = KeyCode.Space;
    [SerializeField] private KeyCode crouchKey = KeyCode.LeftControl;

    [Header("Movement Parameters")]
    [SerializeField] private float walkSpeed = 3.0f;
    [SerializeField] private float sprintSpeed = 6.0f;
    [SerializeField] private float crouchSpeed = 1.5f;

    [Header("Camera Parameters")]
    [SerializeField, Range(1, 10)] private float lookSpeedX = 2.0f;
    [SerializeField, Range(1, 10)] private float lookSpeedY = 2.0f;
    [SerializeField, Range(1, 180)] private float lowerLookLimit = 80.0f;
    [SerializeField, Range(1, 180)] private float upperLookLimit = 80.0f;

    private float currentLookSpeedX = 2.0f;
    private float currentLookSpeedY = 2.0f;
    private bool mouseInverted = false;

    [Header("Jumping Parameters")]
    [SerializeField] private float jumpForce = 8.0f;
    [SerializeField] private float gravity = 30.0f;

    [Header("Crouching Parameters")]
    [SerializeField] private float crouchHeight = 0.5f;
    [SerializeField] private float standinghHeight = 2f;
    [SerializeField] private float timeToCrouch = 0.25f;
    [SerializeField] private Vector3 crouchCenter = new Vector3(0, 0.5f, 0);
    [SerializeField] private Vector3 standingCenter = new Vector3(0, 0, 0);
    private bool isCrouching;
    private bool duringCrouchAnim;

    [Header("Headbob Parameters")]
    [SerializeField] private float walkBobSpeed = 14.0f;
    [SerializeField] private float walkBobAmount = 0.05f;
    [SerializeField] private float sprintBobSpeed = 18.0f;
    [SerializeField] private float sprintBobAmount = 0.11f;

    [Header("Footstep Parameters")]
    [SerializeField] private float baseStepSpeed = 0.5f;
    [SerializeField] private float crouchStepMultiplier = 1.5f;
    [SerializeField] private float sprintStepMultiplier = 0.6f;
    [SerializeField] private AudioSource footstepAudioSource = default;
    [SerializeField] private AudioClip[] woodClips = default;
    [SerializeField] private AudioClip[] stoneClips = default;
    [SerializeField] private AudioClip[] waterClips = default;
    [SerializeField] private AudioClip[] grassClips = default;

    [Header("Spawn Points")]
    [SerializeField] private Transform spawnPoint = default;
    [SerializeField] private Transform miniGameStartPoint = default;

    private float footstepTimer = 0;
    private float GetCurrentOffset => isCrouching ? baseStepSpeed * crouchStepMultiplier : isSprinting ? baseStepSpeed * sprintStepMultiplier : baseStepSpeed;

    private float defaultYPos = 0;
    private float timer;

    private Camera playerCamera;
    private CharacterController characterController;
    private Animator animator;

    private Vector3 moveDirection;
    private Vector2 currentInput;

    private float rotationX = 0;

    void Awake()
    {
        playerCamera = GetComponentInChildren<Camera>();
        characterController = GetComponent<CharacterController>();
        animator = GetComponentInChildren<Animator>(); // [ANIMATION]
        Cursor.lockState = CursorLockMode.Locked;
        Cursor.visible = false;
        defaultYPos = playerCamera.transform.localPosition.y;
    }

    private void Start()
    {
        LoadMouseSettings();

        if (LoadingScene.Instance != null && LoadingScene.Instance.playMiniGame)
        {
            StartMiniGame();
            LoadingScene.Instance.playMiniGame = false;
        }
    }

    void Update()
    {
        if (LoadingScene.Instance != null && LoadingScene.Instance.playMiniGame)
        {
            StartMiniGame();
            LoadingScene.Instance.playMiniGame = false;
        }

        if (CanMove)
        {
            HandleMovementInput();
            HandleMouseLook();

            if (canJump)
                HandleJump();

            if (canCrouch)
                HandleCrouch();

            if (canHeadBob)
                HandleHeadBob();

            if (useFootsteps)
                HandleFootsteps();

            HandleAnimations(); // [ANIMATION]
            ApplyFinalMovements();
        }
    }

    private void HandleMovementInput()
    {
        currentInput = new Vector2((isCrouching ? crouchSpeed : isSprinting ? sprintSpeed : walkSpeed) * Input.GetAxis("Vertical"), (isCrouching ? crouchSpeed : isSprinting ? sprintSpeed : walkSpeed) * Input.GetAxis("Horizontal"));

        float moveDirectionY = moveDirection.y;
        moveDirection = (transform.TransformDirection(Vector3.forward) * currentInput.x) + (transform.TransformDirection(Vector3.right) * currentInput.y);
        moveDirection.y = moveDirectionY;
    }

    private void HandleHeadBob()
    {
        if (!characterController.isGrounded) return;
        if (Mathf.Abs(moveDirection.x) > 0.1f || Mathf.Abs(moveDirection.z) > 0.1f)
        {
            timer += Time.deltaTime * (isSprinting ? sprintBobSpeed : walkBobSpeed);
            playerCamera.transform.localPosition = new Vector3(
                playerCamera.transform.localPosition.x,
                defaultYPos + Mathf.Sin(timer) * (isSprinting ? sprintBobAmount : walkBobAmount),
                playerCamera.transform.localPosition.z);
        }
    }

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

        if (mouseInverted) mouseY = -mouseY;

        rotationX -= mouseY;
        rotationX = Mathf.Clamp(rotationX, -upperLookLimit, lowerLookLimit);
        playerCamera.transform.localRotation = Quaternion.Euler(rotationX, 0, 0);
        transform.rotation *= Quaternion.Euler(0, mouseX, 0);
    }

    private void HandleJump()
    {
        if (ShouldJump)
            moveDirection.y = jumpForce;
    }

    private void HandleCrouch()
    {
        if (ShouldCrouch)
            StartCoroutine(CrouchStand());
    }

    private void ApplyFinalMovements()
    {
        if (!characterController.isGrounded)
            moveDirection.y -= gravity * Time.deltaTime;

        characterController.Move(moveDirection * Time.deltaTime);
    }

    private IEnumerator CrouchStand()
    {
        if (isCrouching && Physics.Raycast(playerCamera.transform.position, Vector3.up, 1f))
            yield break;

        duringCrouchAnim = true;

        float timeElapsed = 0;
        float targetHeight = isCrouching ? standinghHeight : crouchHeight;
        float currentHeight = characterController.height;
        Vector3 targetCenter = isCrouching ? standingCenter : crouchCenter;
        Vector3 currentCenter = characterController.center;

        while (timeElapsed < timeToCrouch)
        {
            characterController.height = Mathf.Lerp(currentHeight, targetHeight, timeElapsed / timeToCrouch);
            characterController.center = Vector3.Lerp(currentCenter, targetCenter, timeElapsed / timeToCrouch);
            timeElapsed += Time.deltaTime;
            yield return null;
        }

        characterController.height = targetHeight;
        characterController.center = targetCenter;
        isCrouching = !isCrouching;
        duringCrouchAnim = false;
    }

    private void HandleFootsteps()
    {
        if (!characterController.isGrounded) return;
        if (currentInput == Vector2.zero) return;

        footstepTimer -= Time.deltaTime;
        if (footstepTimer <= 0)
        {
            if (Physics.Raycast(playerCamera.transform.position, Vector3.down, out RaycastHit hit, 2))
            {
                switch (hit.collider.tag)
                {
                    case "Footsteps/Grass":
                        footstepAudioSource.PlayOneShot(grassClips[Random.Range(0, grassClips.Length - 1)]);
                        break;
                    case "Footsteps/Stone":
                        footstepAudioSource.PlayOneShot(stoneClips[Random.Range(0, stoneClips.Length - 1)]);
                        break;
                    case "Footsteps/Water":
                        footstepAudioSource.PlayOneShot(waterClips[Random.Range(0, waterClips.Length - 1)]);
                        break;
                    case "Footsteps/Wood":
                        footstepAudioSource.PlayOneShot(woodClips[Random.Range(0, woodClips.Length - 1)]);
                        break;
                    default:
                        footstepAudioSource.PlayOneShot(grassClips[Random.Range(0, grassClips.Length - 1)]);
                        break;
                }
            }

            footstepTimer = GetCurrentOffset;
        }
    }

    private void HandleAnimations() // [ANIMATION]
    {
        if (!animator) return;

        float movementMagnitude = new Vector2(moveDirection.x, moveDirection.z).magnitude;

        animator.SetBool("isWalking", movementMagnitude > 0.1f && !isSprinting && !isCrouching);
        animator.SetBool("isRunning", isSprinting && movementMagnitude > 0.1f);
        animator.SetBool("isCrouching", isCrouching);
        animator.SetBool("isJumping", !characterController.isGrounded);
    }

    private void StartMiniGame()
    {
        CanMove = true;

        characterController.enabled = false;

        if (miniGameStartPoint != null)
        {
            transform.position = miniGameStartPoint.position;
        }
        else
        {
            Debug.LogWarning("Mini-game start point not found!");
        }

        characterController.enabled = true;
    }

    public Transform GetMiniGameStartPoint() => miniGameStartPoint;

    public Transform GetSpawnPoint() => spawnPoint;

    private void LoadMouseSettings()
    {
        currentLookSpeedX = PlayerPrefs.GetFloat("XSensitivity", lookSpeedX);
        currentLookSpeedY = PlayerPrefs.GetFloat("YSensitivity", lookSpeedY);
        mouseInverted = PlayerPrefs.GetInt("Inverted", 0) == 1;
    }

    public void UpdateMouseSettings(float sensitivityX, float sensitivityY, bool inverted)
    {
        currentLookSpeedX = sensitivityX;
        currentLookSpeedY = sensitivityY;
        mouseInverted = inverted;
    }

    public void SetCanMove(bool canMove) => CanMove = canMove;
    public void DisablePlayer() => CanMove = false;
    public void EnablePlayer() => CanMove = true;
}