using System.ComponentModel;
using System.Runtime.Serialization;
using System.Text.Json.Serialization;

namespace OSMDatastructure.Graph;

[Serializable]
public class OsmNode
{
    public ulong nodeId { get; }
    public HashSet<OsmEdge> edges { get; set; }
    public Coordinates coordinates { get; } 
    
    [JsonIgnore][NonSerialized]public OsmNode? previousPathNode = null;
    [JsonInclude][NonSerialized]public double currentPathWeight = double.MaxValue;
    [JsonInclude][NonSerialized]public double currentPathLength = double.MaxValue;
    [JsonIgnore][NonSerialized]public double directDistanceToGoal = double.MaxValue;

    [OnDeserialized]
    internal void SetDefaultValues(StreamingContext context)
    {
        currentPathWeight = double.MaxValue;
        currentPathLength = double.MaxValue;
        directDistanceToGoal = double.MaxValue;
    }
    
    public OsmNode(ulong nodeId, float lat, float lon)
    {
        this.nodeId = nodeId;
        this.edges = new();
        this.coordinates = new Coordinates(lat, lon);
    }

    [JsonConstructor]
    public OsmNode(ulong nodeId, Coordinates coordinates)
    {
        this.nodeId = nodeId;
        this.edges = new();
        this.coordinates = coordinates;
    }
    
    public OsmEdge? GetEdgeToNode(OsmNode n)
    {
        HashSet<OsmEdge> e = edges.Where(edge => edge.neighborId == n.nodeId).ToHashSet();
        if (e.Count > 0)
            return e.First();
        else return null;
    }

    public override bool Equals(object? obj)
    {
        return obj != null && obj.GetType() == this.GetType() && ((OsmNode)obj).nodeId == this.nodeId;
    }

    public override string ToString()
    {
        if(previousPathNode is not null)
            return $"{nodeId} {coordinates} ec:{edges.Count} d:{directDistanceToGoal} w:{currentPathWeight} l:{currentPathLength} p:{previousPathNode.nodeId}";
        return
            $"{nodeId} {coordinates} ec:{edges.Count} d:{directDistanceToGoal} w:{currentPathWeight} l:{currentPathLength} null";
    }
}