using System.Collections.Generic;
using Microsoft.Extensions.Logging;
using SmartNav.Model.Navigation;

namespace SmartNav.Data;

public sealed class ZoneSubRegionService
{
	private readonly Dictionary<uint, TerritorySubRegions> _regions = new Dictionary<uint, TerritorySubRegions>();

	public IReadOnlyDictionary<uint, TerritorySubRegions> AllRegions => _regions;

	public ZoneSubRegionService(SmartNavDataOptions dataOptions, ILogger<ZoneSubRegionService> logger)
	{
		foreach (var (s, value) in AssemblyZoneSubRegionLoader.GetRegions(dataOptions.DevSourceDirectory?.FullName))
		{
			if (uint.TryParse(s, out var result))
			{
				_regions[result] = value;
			}
		}
		logger.LogDebug("ZoneSubRegionService: {Count} territories with sub-regions loaded", _regions.Count);
	}

	public bool HasSubRegions(uint territoryId)
	{
		return _regions.ContainsKey(territoryId);
	}

	public string? GetSubRegionId(uint territoryId, float x, float y, float z)
	{
		if (!_regions.TryGetValue(territoryId, out TerritorySubRegions value))
		{
			return null;
		}
		foreach (SubRegionDefinition subRegion in value.SubRegions)
		{
			if (subRegion.Contains(x, y, z))
			{
				return subRegion.Id;
			}
		}
		return "_default";
	}

	public IReadOnlyList<SubRegionDefinition>? GetSubRegions(uint territoryId)
	{
		if (!_regions.TryGetValue(territoryId, out TerritorySubRegions value))
		{
			return null;
		}
		return value.SubRegions;
	}

	public IReadOnlyList<SubRegionConnector>? GetConnectors(uint territoryId)
	{
		if (!_regions.TryGetValue(territoryId, out TerritorySubRegions value))
		{
			return null;
		}
		return value.Connectors;
	}
}