using LctMonolith.Database.UnitOfWork;
using LctMonolith.Models.Database;
using LctMonolith.Services.Interfaces;
using Microsoft.EntityFrameworkCore;
using Serilog;

namespace LctMonolith.Services
{
    public class DialogueService : IDialogueService
    {
        private readonly IUnitOfWork _uow;

        public DialogueService(IUnitOfWork uow)
        {
            _uow = uow;
        }

        public async Task<Dialogue?> GetDialogueByMissionIdAsync(Guid missionId)
        {
            try
            {
                return await _uow.Dialogues
                    .Query(d => d.MissionId == missionId)
                    .FirstOrDefaultAsync();
            }
            catch (Exception ex)
            {
                Log.Error(ex, "GetDialogueByMissionIdAsync failed {MissionId}", missionId);
                throw;
            }
        }

        public async Task<Dialogue> CreateDialogueAsync(Dialogue dialogue)
        {
            try
            {
                dialogue.Id = Guid.NewGuid();
                await _uow.Dialogues.AddAsync(dialogue);
                await _uow.SaveChangesAsync();
                return dialogue;
            }
            catch (Exception ex)
            {
                Log.Error(ex, "CreateDialogueAsync failed {MissionId}", dialogue.MissionId);
                throw;
            }
        }

        public async Task<DialogueMessage?> GetDialogueMessageByIdAsync(Guid messageId)
        {
            try
            {
                return await _uow.DialogueMessages.GetByIdAsync(messageId);
            }
            catch (Exception ex)
            {
                Log.Error(ex, "GetDialogueMessageByIdAsync failed {MessageId}", messageId);
                throw;
            }
        }

        public async Task<IEnumerable<DialogueMessageResponseOption>> GetResponseOptionsAsync(Guid messageId)
        {
            try
            {
                return await _uow.DialogueMessageResponseOptions
                    .Query(o => o.ParentDialogueMessageId == messageId)
                    .ToListAsync();
            }
            catch (Exception ex)
            {
                Log.Error(ex, "GetResponseOptionsAsync failed {MessageId}", messageId);
                throw;
            }
        }

        public async Task<DialogueMessage?> ProcessDialogueResponseAsync(Guid messageId, Guid responseOptionId, Guid playerId)
        {
            try
            {
                var option = await _uow.DialogueMessageResponseOptions
                    .Query(o => o.Id == responseOptionId && o.ParentDialogueMessageId == messageId)
                    .FirstOrDefaultAsync();
                if (option == null)
                {
                    return null;
                }
                if (option.DestinationDialogueMessageId == null)
                {
                    return null;
                }
                return await _uow.DialogueMessages.GetByIdAsync(option.DestinationDialogueMessageId);
            }
            catch (Exception ex)
            {
                Log.Error(ex, "ProcessDialogueResponseAsync failed {MessageId} {ResponseId}", messageId, responseOptionId);
                throw;
            }
        }
    }
}