using System;
using InfiniteWorld.VoxelWorld.Contracts;
using UnityEngine;
using UnityEngine.AI;
using UnityNavMesh = UnityEngine.AI.NavMesh;
using UnityNavMeshBuilder = UnityEngine.AI.NavMeshBuilder;

namespace InfiniteWorld.VoxelWorld.NavMesh
{
    internal sealed class NavCoverageWindowRuntime : IDisposable
    {
        public NavCoverageWindowRuntime(int id, Bounds coverageBounds, float priority, int interestCount)
        {
            Id = id;
            CoverageBounds = coverageBounds;
            Priority = priority;
            InterestCount = interestCount;
            State = NavCoverageState.Pending;
        }

        public int Id { get; }
        public Bounds CoverageBounds;
        public Bounds CollectionBounds;
        public Bounds BuildBounds;
        public float Priority;
        public int InterestCount;
        public NavCoverageState State;
        public NavMeshData NavMeshData;
        public NavMeshDataInstance Instance;
        public AsyncOperation ActiveBuild;
        public bool BuildRequestedWhileRunning;
        public bool MatchedThisFrame;

        public void ResetCoverageData()
        {
            if (ActiveBuild != null && !ActiveBuild.isDone && NavMeshData != null)
            {
                UnityNavMeshBuilder.Cancel(NavMeshData);
            }

            if (Instance.valid)
            {
                UnityNavMesh.RemoveNavMeshData(Instance);
                Instance = default;
            }

            ActiveBuild = null;
            NavMeshData = null;
        }

        public void Dispose()
        {
            ResetCoverageData();
            State = NavCoverageState.Pending;
        }
    }
}