using DG.Tweening;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Serialization;

public class BoardFitter : MonoBehaviour
{
    [Header("Рамка")]
    [SerializeField] private SpriteRenderer _innerLineRenderer;
    [SerializeField] private SpriteRenderer _outlineRenderer;
    [SerializeField] private Vector2 _innerLinePadding = new(0.64f, 0.69f);

    [Header("Задний фон")]
    [SerializeField, FormerlySerializedAs("backgroundRenderer")] private SpriteRenderer _backgroundRenderer;
    [SerializeField, FormerlySerializedAs("bgHorizontalPadding")] private float _backgroundHorizontalPadding = 0.78f;
    [SerializeField, FormerlySerializedAs("bgVerticalPadding")] private float _backgroundVerticalPadding = 0.68f;

    [Header("Ячейки")]
    [SerializeField, FormerlySerializedAs("cellPrefab")] private GameObject _cellPrefab;
    [SerializeField, FormerlySerializedAs("cellsRoot")] private Transform _cellsRoot;
    [SerializeField, FormerlySerializedAs("cellScale")] private float _cellScale = 1f;
    [SerializeField, FormerlySerializedAs("cellOffset")] private float _cellOffset = 0.1f;
    [SerializeField, FormerlySerializedAs("cellGroupPadding")] private float _cellGroupPadding = 3f;

    [Header("Подготовленная позиция")]
    [SerializeField, FormerlySerializedAs("stickedOffset")] private float _stickedOffset = 2f;

    private List<GameObject> _cells;
    private Color _currentCellsColor = Color.white;
    private bool _hasCurrentCellsColor;

    public BoardConfiguration GetConfiguration()
    {
        if (_cells == null)
            throw new System.NullReferenceException($"Объект не инициализирован {this}");

        Vector2 offset = new(_cellScale + _cellOffset, -(_cellScale + _cellOffset));

        return new BoardConfiguration(
            topLeft: _cells[0].transform,
            cellOffset: offset,
            stickedYOffset: _stickedOffset);
    }

    public void FitBoard(int columns, int rows)
    {
        columns = Mathf.Clamp(columns, 4, 8);
        rows = Mathf.Clamp(rows, 4, 8);

        ClearCells();
        GenerateCells(columns, rows);

        float groupWidth = (_cellScale + _cellOffset) * columns;
        float groupHeight = (_cellScale + _cellOffset) * rows;

        FitFrame(groupWidth, groupHeight);
        FitCellsRoot(groupWidth, groupHeight);
    }

    public Sequence GetColorSequence(Color innerColor, Color outlineColor, Color cellsColor, float duration)
    {
        _currentCellsColor = cellsColor;
        _hasCurrentCellsColor = true;

        Sequence sequence = DOTween.Sequence();
        sequence.Join(_innerLineRenderer.DOColor(innerColor, duration));
        sequence.Join(_outlineRenderer.DOColor(outlineColor, duration));

        foreach (SpriteRenderer cellRenderer in _cellsRoot.GetComponentsInChildren<SpriteRenderer>(true))
            sequence.Join(cellRenderer.DOColor(cellsColor, duration));

        return sequence;
    }

    public void SetColorsImmediately(Color innerColor, Color outlineColor, Color cellsColor)
    {
        _currentCellsColor = cellsColor;
        _hasCurrentCellsColor = true;

        _innerLineRenderer.DOKill();
        _outlineRenderer.DOKill();
        _innerLineRenderer.color = innerColor;
        _outlineRenderer.color = outlineColor;

        foreach (SpriteRenderer cellRenderer in _cellsRoot.GetComponentsInChildren<SpriteRenderer>(true))
        {
            cellRenderer.DOKill();
            cellRenderer.color = cellsColor;
        }
    }

    private void FitCellsRoot(float groupWidth, float groupHeight)
    {
        float rootX = -groupWidth * 0.5f;
        float rootY = (groupHeight + _outlineRenderer.size.y - _cellScale) * 0.5f;
        _cellsRoot.localPosition = new Vector3(rootX, rootY, 0f);
    }

    private void FitFrame(float groupWidth, float groupHeight)
    {
        Vector2 frameSize = new(groupWidth + _cellGroupPadding, groupHeight + _cellGroupPadding);
        _outlineRenderer.size = frameSize;
        _innerLineRenderer.size = new Vector2(
            Mathf.Max(frameSize.x - _innerLinePadding.x, 0f),
            Mathf.Max(frameSize.y - _innerLinePadding.y, 0f));

        _backgroundRenderer.transform.localScale = new Vector3(
            frameSize.x - _backgroundHorizontalPadding,
            frameSize.y - _backgroundVerticalPadding,
            1f);
    }

    private void GenerateCells(int columns, int rows)
    {
        _cells = new List<GameObject>();

        for (int row = 0; row < rows; row++)
        {
            for (int column = 0; column < columns; column++)
            {
                GameObject cellObject = Instantiate(_cellPrefab, _cellsRoot);
                Transform cell = cellObject.transform;

                cell.localScale = new Vector3(_cellScale, _cellScale, 1f);

                float x = column * (_cellScale + _cellOffset) + _cellScale * 0.5f;
                float y = -row * (_cellScale + _cellOffset) - _cellScale * 0.5f;
                cell.localPosition = new Vector3(x, y, 0f);

                if (_hasCurrentCellsColor)
                {
                    foreach (SpriteRenderer cellRenderer in cellObject.GetComponentsInChildren<SpriteRenderer>(true))
                        cellRenderer.color = _currentCellsColor;
                }

                _cells.Add(cellObject);
            }
        }
    }

    private void ClearCells()
    {
        for (int i = _cellsRoot.childCount - 1; i >= 0; i--)
            Destroy(_cellsRoot.GetChild(i).gameObject);
    }
}