hellbound/Assets/Scripts/Game/Settings/LevelSettings.cs

using System;
using UnityEngine;
using System.Collections.Generic;
using System.Linq;
using game;

public class LevelSettings
{
    public IReadOnlyList<uint> DefaultSequence => _defaultSequence;
    public IReadOnlyList<EnumLevelType> DefaultPattern => _defaultPattern;
    public IReadOnlyList<ConfLevelsPattern> Patterns => _patterns;
    public IList<LevelData> GetAll => _levels;
    public int TutorialLenght { get; } = 0;
    public bool HasTutorial => TutorialLenght > 0;

    private readonly List<uint> _defaultSequence = default;
    private readonly List<EnumLevelType> _defaultPattern = default;
    private readonly List<ConfLevelsPattern> _patterns = default;
    private readonly List<LevelData> _levels = default;

    public LevelSettings(ConfGameLevels config)
    {
        _defaultSequence = config.original;
        _defaultPattern = config.originalPattern.sequence;
        _patterns = config.customPatterns;
        _levels = new List<LevelData>(config.levels.Count);

        for (int i = 0; i < config.levels.Count; i++)
            _levels.Add(new LevelData(config.levels[i]));

        IList<uint> tutorial = GetIDsBy(l => l.Type == EnumLevelType.TUTORIAL);
        TutorialLenght = tutorial.Count;

        if (_defaultSequence.ContainsAnyOf(tutorial))
            throw new InvalidOperationException("Default sequence has tutorial level.");

        Log.Debug($"LevelSettings.Constructor: Uploaded successful {_levels.Count}");
    }

    public List<EnumLevelType> GetRandomPattern()
    {
        return _patterns.RandomValue().sequence;
    }

    public IList<LevelData> GetBy([JetBrains.Annotations.NotNull] Predicate<LevelData> conditional)
    {
        if (conditional == null)
            throw new ArgumentNullException(nameof(conditional));

        return
            (from item in _levels
            where conditional.Invoke(item)
            select item).ToList();
    }

    public IList<uint> GetIDsBy([JetBrains.Annotations.NotNull] Predicate<LevelData> conditional)
    {
        if (conditional == null)
            throw new ArgumentNullException(nameof(conditional));

        return
            (from item in _levels
            where conditional.Invoke(item)
            select item.ID).ToList();
    }

    public static GameObject GetPrefabByID(uint id)
    {
        return Assets.Load<GameObject>(GetPrefabPath(id));
    }

    public static string GetPrefabPath(uint id)
    {
        return $"Levels/Level{id}";
    }
}