using System;
using System.Collections.Generic;
using System.Linq;
using Dalamud.Plugin.Services;
using Pal.Client.DependencyInjection;
using Pal.Client.Extensions;
using Pal.Client.Floors;
using Pal.Client.Rendering;

namespace Pal.Client.Commands;

internal sealed class PalNearCommand : ISubCommand
{
    private readonly Chat _chat;
    private readonly IClientState _clientState;
    private readonly TerritoryState _territoryState;
    private readonly FloorService _floorService;

    public PalNearCommand(Chat chat, IClientState clientState, TerritoryState territoryState,
        FloorService floorService)
    {
        _chat = chat;
        _clientState = clientState;
        _territoryState = territoryState;
        _floorService = floorService;
    }


    public IReadOnlyDictionary<string, Action<string>> GetHandlers()
        => new Dictionary<string, Action<string>>
        {
            { "near", _ => DebugNearest(_ => true) },
            { "tnear", _ => DebugNearest(m => m.Type == MemoryLocation.EType.Trap) },
            { "hnear", _ => DebugNearest(m => m.Type == MemoryLocation.EType.Hoard) },
        };

    private void DebugNearest(Predicate<PersistentLocation> predicate)
    {
        if (!_territoryState.IsInDeepDungeon())
            return;

        var state = _floorService.GetTerritoryIfReady(_clientState.TerritoryType);
        if (state == null)
            return;

        var playerPosition = _clientState.LocalPlayer?.Position;
        if (playerPosition == null)
            return;
        _chat.Message($"Your position: {playerPosition}");

        var nearbyMarkers = state.Locations
            .Where(m => predicate(m))
            .Where(m => m.RenderElement != null && m.RenderElement.Color != RenderData.ColorInvisible)
            .Select(m => new { m, distance = (playerPosition.Value - m.Position).Length() })
            .OrderBy(m => m.distance)
            .Take(5)
            .ToList();
        foreach (var nearbyMarker in nearbyMarkers)
            _chat.UnformattedMessage(
                $"{nearbyMarker.distance:F2} - {nearbyMarker.m.Type} {nearbyMarker.m.NetworkId?.ToPartialId(length: 8)} - {nearbyMarker.m.Position}");
    }
}