using UnityEngine;
using TMPro;

public class Game : MonoBehaviour
{
    // Auto-bootstrap when game starts - no Editor setup needed
    [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.AfterSceneLoad)]
    static void Bootstrap()
    {
        if (Instance != null) return;

        var gameGO = new GameObject("Game");
        gameGO.AddComponent<Game>();
    }

    // ===========================================
    // CONFIGURATION
    // ===========================================

    // Camera settings for grid view
    public const float CameraZoom = 28f;  // Fits 20x50 grid
    public const float CameraMinZoom = 15f;
    public const float CameraMaxZoom = 35f;

    // References
    public static Game Instance { get; private set; }

    GridBoard gridBoard;
    TextMeshProUGUI scoreText;
    TextMeshProUGUI gameOverText;
    TextMeshProUGUI turnText;

    void Awake()
    {
        Instance = this;
    }

    void Start()
    {
        SetupCamera();
        CreateUI();
        CreateGridBoard();
    }

    void SetupCamera()
    {
        var cam = Camera.main;
        if (cam != null)
        {
            cam.orthographic = true;
            cam.orthographicSize = CameraZoom;
            cam.transform.position = new Vector3(0, 0, -10);
            cam.backgroundColor = new Color(0.1f, 0.1f, 0.15f);

            // Add camera controller for zoom/pan
            var controller = cam.gameObject.AddComponent<CameraController>();
            controller.minZoom = CameraMinZoom;
            controller.maxZoom = CameraMaxZoom;
        }
    }

    void CreateUI()
    {
        // Create Canvas
        var canvasGO = new GameObject("Canvas");
        var canvas = canvasGO.AddComponent<Canvas>();
        canvas.renderMode = RenderMode.ScreenSpaceOverlay;
        canvasGO.AddComponent<UnityEngine.UI.CanvasScaler>();
        canvasGO.AddComponent<UnityEngine.UI.GraphicRaycaster>();

        // Score text (top center)
        var scoreGO = new GameObject("ScoreText");
        scoreGO.transform.SetParent(canvasGO.transform, false);
        scoreText = scoreGO.AddComponent<TextMeshProUGUI>();
        scoreText.text = "0 - 0";
        scoreText.fontSize = 48;
        scoreText.alignment = TextAlignmentOptions.Center;
        scoreText.color = Color.white;

        var scoreRect = scoreGO.GetComponent<RectTransform>();
        scoreRect.anchorMin = new Vector2(0.5f, 1f);
        scoreRect.anchorMax = new Vector2(0.5f, 1f);
        scoreRect.pivot = new Vector2(0.5f, 1f);
        scoreRect.anchoredPosition = new Vector2(0, -20);
        scoreRect.sizeDelta = new Vector2(200, 60);

        // Turn indicator (below score)
        var turnGO = new GameObject("TurnText");
        turnGO.transform.SetParent(canvasGO.transform, false);
        turnText = turnGO.AddComponent<TextMeshProUGUI>();
        turnText.text = "BLUE'S TURN";
        turnText.fontSize = 32;
        turnText.alignment = TextAlignmentOptions.Center;
        turnText.color = Color.blue;

        var turnRect = turnGO.GetComponent<RectTransform>();
        turnRect.anchorMin = new Vector2(0.5f, 1f);
        turnRect.anchorMax = new Vector2(0.5f, 1f);
        turnRect.pivot = new Vector2(0.5f, 1f);
        turnRect.anchoredPosition = new Vector2(0, -80);
        turnRect.sizeDelta = new Vector2(300, 50);

        // Instructions (bottom)
        var instructionsGO = new GameObject("InstructionsText");
        instructionsGO.transform.SetParent(canvasGO.transform, false);
        var instructionsText = instructionsGO.AddComponent<TextMeshProUGUI>();
        instructionsText.text = "Click unit to select, then click destination to move";
        instructionsText.fontSize = 20;
        instructionsText.alignment = TextAlignmentOptions.Center;
        instructionsText.color = new Color(0.7f, 0.7f, 0.7f);

        var instrRect = instructionsGO.GetComponent<RectTransform>();
        instrRect.anchorMin = new Vector2(0.5f, 0f);
        instrRect.anchorMax = new Vector2(0.5f, 0f);
        instrRect.pivot = new Vector2(0.5f, 0f);
        instrRect.anchoredPosition = new Vector2(0, 20);
        instrRect.sizeDelta = new Vector2(500, 40);

        // Game over text (hidden initially)
        var gameOverGO = new GameObject("GameOverText");
        gameOverGO.transform.SetParent(canvasGO.transform, false);
        gameOverText = gameOverGO.AddComponent<TextMeshProUGUI>();
        gameOverText.text = "";
        gameOverText.fontSize = 72;
        gameOverText.alignment = TextAlignmentOptions.Center;
        gameOverText.color = Color.white;
        gameOverText.gameObject.SetActive(false);

        var gameOverRect = gameOverGO.GetComponent<RectTransform>();
        gameOverRect.anchorMin = new Vector2(0.5f, 0.5f);
        gameOverRect.anchorMax = new Vector2(0.5f, 0.5f);
        gameOverRect.pivot = new Vector2(0.5f, 0.5f);
        gameOverRect.anchoredPosition = Vector2.zero;
        gameOverRect.sizeDelta = new Vector2(400, 100);
    }

    void CreateGridBoard()
    {
        var boardGO = new GameObject("GridBoard");
        gridBoard = boardGO.AddComponent<GridBoard>();

        // Pass UI references
        gridBoard.scoreText = scoreText;
        gridBoard.gameOverText = gameOverText;
        gridBoard.turnText = turnText;
    }
}