using UnityEngine;
using UnityEngine.Rendering.PostProcessing;
using System.Collections.Generic;
using TMPro;

public class CarSelectionManager : MonoBehaviour
{
    [Header("Car Selection")]
    public CarData[] allCarData;
    public GameObject[] allCarPrefabs;
    public Transform playerSpawnPoint;
    public List<Transform> aiSpawnPoints;

    [Header("Camera")]
    public CameraController cameraController;

    [Header("Name Tags")]
    public GameObject nameTagPrefab; // World space canvas with TextMeshProUGUI

    private PostProcessVolume cachedVolume;

    // Random AI names
    private List<string> availableAINames = new List<string> { "Nitro", "Shadow", "Blaze", "Turbo", "Skid", "Flash", "Dash", "Zed" };


    private void Start()
    {
        cachedVolume = Camera.main.GetComponent<PostProcessVolume>();

        int selectedIndex = GameConstants.CarSelected;

        if (selectedIndex < 0 || selectedIndex >= allCarPrefabs.Length || selectedIndex >= allCarData.Length)
        {
            Debug.LogError("Selected car index is out of bounds!");
            return;
        }

        // === PLAYER CAR ===
        GameObject playerCar = Instantiate(
            allCarPrefabs[selectedIndex],
            playerSpawnPoint.position,
            playerSpawnPoint.rotation,
            playerSpawnPoint
        );

        playerCar.transform.localPosition = Vector3.zero;
        playerCar.transform.localRotation = Quaternion.identity;

        VehicleController playerController = playerCar.GetComponent<VehicleController>();
        if (playerController != null)
        {
            playerController.InitializeWithData(allCarData[selectedIndex]);
            playerController.isAIControlled = false;

            cameraController.target = playerController.transform;
            cameraController.InitializeTarget();
        }

        NOSController playerNOS = playerCar.GetComponent<NOSController>();
        if (playerNOS != null && cachedVolume != null)
        {
            playerNOS.SetPostProcessVolume(cachedVolume);
        }

        CreateNameTag(playerCar.transform, GameConstants.PlayerName);

        // === AI CARS ===
        int aiCount = Mathf.Min(3, aiSpawnPoints.Count);
        for (int i = 0; i < aiCount; i++)
        {
            int aiPrefabIndex = (selectedIndex + i + 1) % allCarPrefabs.Length;
            Transform spawn = aiSpawnPoints[i];

            GameObject aiCar = Instantiate(
                allCarPrefabs[aiPrefabIndex],
                spawn.position,
                spawn.rotation
            );

            VehicleController aiController = aiCar.GetComponent<VehicleController>();
            if (aiController != null)
            {
                aiController.InitializeWithData(allCarData[selectedIndex]); // same stats as player
                aiController.isAIControlled = true;
            }
            string aiName = availableAINames[Random.Range(0, availableAINames.Count)];
            availableAINames.Remove(aiName);
            CreateNameTag(aiCar.transform, aiName);

        }
    }

    private void CreateNameTag(Transform carTransform, string nameText)
    {
        GameObject nameTag = Instantiate(nameTagPrefab, carTransform);
        nameTag.transform.localPosition = new Vector3(0, 2.5f, 0); // Adjust height above car
        TextMeshProUGUI text = nameTag.GetComponentInChildren<TextMeshProUGUI>();
        if (text != null) text.text = nameText;
    }
}