324 lines
12 KiB
C#
324 lines
12 KiB
C#
using LocationsApi.Models;
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using MongoDB.Driver;
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namespace LocationsApi.Services;
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public class UnitTrainingService
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{
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private const string ScoutUnitType = "Scout";
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private const string ArcherUnitType = "Archer";
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private readonly IMongoCollection<UnitTraining> _training;
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private readonly IMongoCollection<UnitInstance> _units;
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private readonly IMongoCollection<Location> _locations;
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private readonly ResourceService _resources;
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private readonly GameSettingsService _settings;
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private readonly int _scoutGoldCost;
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private readonly int _archerGoldCost;
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private readonly int _archerWoodCost;
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private readonly int _defaultScoutTrainingSeconds;
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private readonly int _defaultArcherTrainingSeconds;
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private readonly int _visibilityDepth;
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public UnitTrainingService(IConfiguration cfg, ResourceService resources, GameSettingsService settings)
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{
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var connectionString = cfg["MongoDB:ConnectionString"] ?? "mongodb://127.0.0.1:27017";
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var databaseName = cfg["MongoDB:DatabaseName"] ?? "territory-autobattler";
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var client = new MongoClient(connectionString);
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var database = client.GetDatabase(databaseName);
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_training = database.GetCollection<UnitTraining>("UnitTraining");
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_units = database.GetCollection<UnitInstance>("Units");
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_locations = database.GetCollection<Location>("Locations");
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_resources = resources;
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_settings = settings;
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_scoutGoldCost = int.TryParse(cfg["Units:ScoutGoldCost"], out var scoutGoldCost) ? Math.Max(0, scoutGoldCost) : 50;
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_archerGoldCost = int.TryParse(cfg["Units:ArcherGoldCost"], out var archerGoldCost) ? Math.Max(0, archerGoldCost) : 100;
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_archerWoodCost = int.TryParse(cfg["Units:ArcherWoodCost"], out var archerWoodCost) ? Math.Max(0, archerWoodCost) : 100;
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_defaultScoutTrainingSeconds = int.TryParse(cfg["Units:ScoutTrainingSeconds"], out var scoutTrainingSeconds)
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? Math.Max(1, scoutTrainingSeconds)
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: 60;
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_defaultArcherTrainingSeconds = int.TryParse(cfg["Units:ArcherTrainingSeconds"], out var archerTrainingSeconds)
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? Math.Max(1, archerTrainingSeconds)
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: 60;
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_visibilityDepth = int.TryParse(cfg["World:VisibilityDepth"], out var visibilityDepth) ? Math.Max(0, visibilityDepth) : 3;
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_training.Indexes.CreateOne(new CreateIndexModel<UnitTraining>(
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Builders<UnitTraining>.IndexKeys.Ascending(x => x.Username).Ascending(x => x.Status)));
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_units.Indexes.CreateOne(new CreateIndexModel<UnitInstance>(
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Builders<UnitInstance>.IndexKeys.Ascending(x => x.Username).Ascending(x => x.UnitType)));
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_units.Indexes.CreateOne(new CreateIndexModel<UnitInstance>(
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Builders<UnitInstance>.IndexKeys.Ascending(x => x.SourceTrainingId),
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new CreateIndexOptions<UnitInstance>
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{
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Unique = true,
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Sparse = true
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}));
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}
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public async Task<PlayerUnitsResponse> GetMineAsync(string username)
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{
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await CompleteFinishedTrainingAsync(username);
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await _training.DeleteManyAsync(x => x.Username == username && x.Status == "Consumed");
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var allTraining = await _training.Find(x => x.Username == username).ToListAsync();
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var allUnits = await _units.Find(x => x.Username == username).ToListAsync();
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var completedScouts = allTraining.Count(x => x.UnitType == ScoutUnitType && x.Status == "Completed");
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var completedArchers = allUnits.Count(x => x.UnitType == ArcherUnitType);
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var activeTraining = allTraining
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.Where(x => x.Status == "Training")
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.OrderBy(x => x.CompletesAtUtc)
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.Select(UnitTrainingResponse.FromTraining)
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.ToList();
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return new PlayerUnitsResponse
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{
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CompletedScouts = completedScouts,
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CompletedArchers = completedArchers,
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Training = activeTraining,
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Units = allUnits
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.OrderBy(x => x.Q)
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.ThenBy(x => x.R)
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.ThenBy(x => x.CreatedAtUtc)
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.Select(UnitInstanceResponse.FromUnit)
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.ToList()
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};
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}
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public async Task<UnitTraining?> TrainAsync(string username, TrainUnitRequest request)
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{
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var normalizedUnitType = NormalizeUnitType(request.UnitType);
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if (normalizedUnitType is null)
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{
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throw new ArgumentException("Unsupported unit type.", nameof(request.UnitType));
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}
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Location? origin = null;
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if (normalizedUnitType == ArcherUnitType)
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{
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if (request.Q is null || request.R is null)
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{
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throw new InvalidOperationException("Select a completed Barracks to train Archers.");
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}
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origin = await GetBuiltBarracksAsync(username, request.Q.Value, request.R.Value);
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if (origin is null)
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{
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throw new InvalidOperationException("A completed Barracks is required to train Archers.");
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}
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}
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var goldCost = normalizedUnitType == ArcherUnitType ? _archerGoldCost : _scoutGoldCost;
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var woodCost = normalizedUnitType == ArcherUnitType ? _archerWoodCost : 0;
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var spent = normalizedUnitType == ArcherUnitType
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? await _resources.TrySpendResourcesAsync(username, goldCost, woodCost, 0)
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: await _resources.TrySpendGoldAsync(username, goldCost);
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if (!spent)
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{
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return null;
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}
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var now = DateTime.UtcNow;
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var trainingSeconds = normalizedUnitType == ArcherUnitType
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? await _settings.GetIntAsync(GameSettingsService.ArcherTrainingSeconds, _defaultArcherTrainingSeconds)
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: await _settings.GetIntAsync(GameSettingsService.ScoutTrainingSeconds, _defaultScoutTrainingSeconds);
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var training = new UnitTraining
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{
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Username = username,
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UnitType = normalizedUnitType,
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GoldCost = goldCost,
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WoodCost = woodCost,
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OriginQ = origin?.Q,
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OriginR = origin?.R,
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Status = "Training",
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StartedAtUtc = now,
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CompletesAtUtc = now.AddSeconds(trainingSeconds),
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CreatedAtUtc = now,
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UpdatedAtUtc = now
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};
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await _training.InsertOneAsync(training);
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return training;
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}
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public async Task<List<UnitInstance>> MoveSquadAsync(string username, MoveUnitSquadRequest request)
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{
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var normalizedUnitType = NormalizeUnitType(request.UnitType);
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if (normalizedUnitType != ArcherUnitType)
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{
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throw new ArgumentException("Only Archer squads can be moved right now.", nameof(request.UnitType));
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}
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if (request.FromQ == request.ToQ && request.FromR == request.ToR)
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{
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throw new InvalidOperationException("Select a different destination tile.");
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}
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if (!await CanMoveToAsync(username, request.ToQ, request.ToR))
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{
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throw new InvalidOperationException("Archers can only move to visible non-rival tiles.");
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}
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var now = DateTime.UtcNow;
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var units = await _units.Find(x =>
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x.Username == username &&
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x.UnitType == ArcherUnitType &&
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x.Q == request.FromQ &&
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x.R == request.FromR)
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.ToListAsync();
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if (units.Count == 0)
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{
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return [];
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}
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await _units.UpdateManyAsync(
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x => x.Username == username &&
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x.UnitType == ArcherUnitType &&
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x.Q == request.FromQ &&
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x.R == request.FromR,
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Builders<UnitInstance>.Update
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.Set(x => x.Q, request.ToQ)
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.Set(x => x.R, request.ToR)
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.Set(x => x.Status, "Idle")
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.Set(x => x.UpdatedAtUtc, now));
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return await _units.Find(x =>
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x.Username == username &&
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x.UnitType == ArcherUnitType &&
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x.Q == request.ToQ &&
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x.R == request.ToR)
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.ToListAsync();
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}
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private async Task<Location?> GetBuiltBarracksAsync(string username, int q, int r)
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{
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await CompleteFinishedBuildingsAsync(username);
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return await _locations.Find(x =>
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x.OwnerUsername == username &&
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x.Q == q &&
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x.R == r &&
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x.BuildingType == "Barracks" &&
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(x.BuildingStatus == "Built" || x.BuildingStatus == null || x.BuildingStatus == ""))
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.FirstOrDefaultAsync();
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}
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private async Task CompleteFinishedBuildingsAsync(string username)
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{
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var now = DateTime.UtcNow;
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var update = Builders<Location>.Update
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.Set(x => x.BuildingStatus, "Built")
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.Set(x => x.BuildingBuiltAtUtc, now)
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.Set(x => x.UpdatedAtUtc, now);
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await _locations.UpdateManyAsync(
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x => x.OwnerUsername == username &&
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x.BuildingType == "Barracks" &&
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x.BuildingStatus == "Building" &&
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x.BuildingCompletesAtUtc <= now,
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update);
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}
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private async Task<bool> CanMoveToAsync(string username, int q, int r)
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{
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var ownedLocations = await _locations.Find(x => x.OwnerUsername == username).ToListAsync();
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if (!ownedLocations.Any(owned => HexDistance(owned.Q, owned.R, q, r) <= _visibilityDepth))
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{
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return false;
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}
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var target = await _locations.Find(x => x.Q == q && x.R == r).FirstOrDefaultAsync();
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return target is null ||
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string.IsNullOrWhiteSpace(target.OwnerUsername) ||
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string.Equals(target.OwnerUsername, username, StringComparison.OrdinalIgnoreCase);
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}
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private static int HexDistance(int q1, int r1, int q2, int r2)
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{
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var s1 = -q1 - r1;
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var s2 = -q2 - r2;
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return Math.Max(Math.Max(Math.Abs(q1 - q2), Math.Abs(r1 - r2)), Math.Abs(s1 - s2));
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}
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public async Task<bool> TryConsumeCompletedScoutAsync(string username)
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{
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await CompleteFinishedTrainingAsync(username);
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var consumed = await _training.FindOneAndDeleteAsync(
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x => x.Username == username && x.UnitType == ScoutUnitType && x.Status == "Completed",
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new FindOneAndDeleteOptions<UnitTraining>
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{
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Sort = Builders<UnitTraining>.Sort.Ascending(x => x.CompletedAtUtc).Ascending(x => x.CreatedAtUtc)
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});
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return consumed is not null;
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}
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public async Task<bool> HasCompletedScoutAsync(string username)
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{
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await CompleteFinishedTrainingAsync(username);
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return await _training.Find(x => x.Username == username && x.UnitType == ScoutUnitType && x.Status == "Completed").AnyAsync();
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}
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private async Task CompleteFinishedTrainingAsync(string username)
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{
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var now = DateTime.UtcNow;
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var readyTraining = await _training.Find(x =>
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x.Username == username &&
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x.Status == "Training" &&
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x.CompletesAtUtc <= now)
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.ToListAsync();
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foreach (var training in readyTraining)
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{
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var update = Builders<UnitTraining>.Update
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.Set(x => x.Status, "Completed")
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.Set(x => x.CompletedAtUtc, now)
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.Set(x => x.UpdatedAtUtc, now);
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var completed = await _training.FindOneAndUpdateAsync(
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x => x.Id == training.Id && x.Status == "Training",
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update,
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new FindOneAndUpdateOptions<UnitTraining>
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{
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ReturnDocument = ReturnDocument.After
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});
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if (completed is null || completed.UnitType != ArcherUnitType)
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{
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continue;
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}
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var unit = new UnitInstance
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{
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Username = completed.Username,
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UnitType = ArcherUnitType,
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Q = completed.OriginQ ?? 0,
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R = completed.OriginR ?? 0,
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Status = "Idle",
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SourceTrainingId = completed.Id,
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CreatedAtUtc = now,
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UpdatedAtUtc = now
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};
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try
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{
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await _units.InsertOneAsync(unit);
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}
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catch (MongoWriteException)
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{
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}
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}
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}
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private static string? NormalizeUnitType(string unitType)
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{
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var trimmed = unitType.Trim();
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return trimmed.ToLowerInvariant() switch
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{
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"scout" => ScoutUnitType,
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"archer" => ArcherUnitType,
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_ => null
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};
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}
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}
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