using System.Collections.Generic;
using System.Linq;
using EscapeRoomEngine.Engine.Runtime.Modules;
using EscapeRoomEngine.Engine.Runtime.Utilities;
using UnityEngine;
using Logger = EscapeRoomEngine.Engine.Runtime.Utilities.Logger;
using LogType = EscapeRoomEngine.Engine.Runtime.Utilities.LogType;

namespace EscapeRoomEngine.Engine.Runtime.Requirements
{
    public abstract class PlacementRequirement : Requirement<Vector2Int>
    {
        protected abstract override IEnumerable<Vector2Int> GenerateCandidates(Module module, Space space);

        public static bool TryPlacing(Module module, Space space)
        {
            if (module.description.placementRequirements.Count == 0)
            {
                // don't evaluate requirements if there are none
                return true;
            }
            
            var placementCandidates = Candidates(
                space.rrDimensions.EveryPosition,
                module.description.placementRequirements,
                module, space);
            
            Logger.Log($"placement candidates: {string.Join(", ", placementCandidates.ToList().ConvertAll(c => c.ToString()))}", LogType.RequirementResolution);
            
            if (placementCandidates.Count > 0)
            {
                module.Place(placementCandidates.RandomElement());
                return true;
            }
            // ReSharper disable once RedundantIfElseBlock
            else
            {
                Logger.Log($"Could not find suitable placement for {module}", LogType.RequirementResolution);
                return false;
            }
        }
    }
}