using UnityEngine;
using Unheimlich.Managers;

namespace Unheimlich.UI.DetectiveBoard
{
    /// <summary>
    /// Renders a connection line between two clue nodes on the detective board.
    /// Visual style changes based on certainty level and elimination state.
    /// </summary>
    [RequireComponent(typeof(LineRenderer))]
    public class ConnectionLineRenderer : MonoBehaviour
    {
        private LineRenderer _lineRenderer;
        private string _fromClueID;
        private string _toClueID;
        private DetectiveBoardManager.CertaintyLevel _certainty;
        private bool _isEliminated;
        
        public string FromClueID => _fromClueID;
        public string ToClueID => _toClueID;
        
        private void Awake()
        {
            _lineRenderer = GetComponent<LineRenderer>();
        }
        
        /// <summary>
        /// Initializes the connection line between two nodes.
        /// </summary>
        public void Initialize(string fromClueID, string toClueID, 
            DetectiveBoardManager.CertaintyLevel certainty, Color color, float width)
        {
            _fromClueID = fromClueID;
            _toClueID = toClueID;
            _certainty = certainty;
            
            if (_lineRenderer != null)
            {
                _lineRenderer.startWidth = width;
                _lineRenderer.endWidth = width;
                _lineRenderer.material = new Material(Shader.Find("Sprites/Default"));
                _lineRenderer.startColor = color;
                _lineRenderer.endColor = color;
            }
        }
        
        /// <summary>
        /// Updates the line positions based on node transforms.
        /// </summary>
        public void UpdateLine(Vector3 startPos, Vector3 endPos)
        {
            if (_lineRenderer != null)
            {
                _lineRenderer.SetPosition(0, startPos);
                _lineRenderer.SetPosition(1, endPos);
            }
        }
        
        /// <summary>
        /// Updates the certainty level and visual appearance.
        /// </summary>
        public void SetCertainty(DetectiveBoardManager.CertaintyLevel certainty, Color color)
        {
            _certainty = certainty;
            
            if (_lineRenderer != null)
            {
                _lineRenderer.startColor = color;
                _lineRenderer.endColor = color;
            }
        }
        
        /// <summary>
        /// Marks this connection as eliminated.
        /// </summary>
        public void SetEliminated(bool eliminated)
        {
            _isEliminated = eliminated;
            
            if (_lineRenderer != null)
            {
                float alpha = eliminated ? 0.3f : 1f;
                Color color = _lineRenderer.startColor;
                color.a = alpha;
                _lineRenderer.startColor = color;
                _lineRenderer.endColor = color;
            }
        }
    }
}