using System;
using System.Collections.Generic;
using UnityEngine;
namespace DepthsOfGreed.HandbookUI
{
    public enum BuildFailure { None, OutsideRegion, Overlap, WallLimit, InteriorLimit, TypeLimit, Cooldown, Energy, Entrails, InvalidType, PathBlocked }
    public readonly struct BuildCheck
    {
        public readonly BuildFailure failure;
        public readonly string message;
        public bool Allowed => failure == BuildFailure.None;
        public BuildCheck(BuildFailure code, string text = null) { failure = code; message = text; }
    }
    public readonly struct BuildRequest
    {
        public readonly HandbookTowerEntry type;
        public readonly Vector3 position;
        public readonly float rotationDegrees;
        public BuildRequest(HandbookTowerEntry entry, Vector3 point, float angle = 0) { type = entry; position = point; rotationDegrees = angle; }
    }
    public sealed class BuiltObjectSnapshot
    {
        public long instanceId;
        public HandbookTowerEntry type;
        public Vector3 position;
        public float rotationDegrees;
        public GameObject instance;
        public int upgradeLevel;
        public float expiresAt;
    }
    // Implement on a MonoBehaviour and assign HandbookController.gameplayBackend.
    public interface IHandbookGameplay
    {
        event Action StateChanged;
        int Energy { get; }
        int Entrails { get; }
        int WallCount { get; }
        int WallLimit { get; }
        IReadOnlyList<BuiltObjectSnapshot> BuiltObjects { get; }
        BuildCheck CheckAvailability(HandbookTowerEntry type);
        BuildCheck CheckBuild(BuildRequest request);
        BuildCheck ExecuteBuild(BuildRequest request);
        BuildCheck CheckUpgrade(long instanceId);
        BuildCheck ExecuteUpgrade(long instanceId);
        float GetCooldownRemaining(HandbookTowerEntry type);
    }
}