using pet_companion_api.Models;
using pet_companion_api.Repositories;

namespace pet_companion_api.Services
{
    public class PetService
    {
        private readonly PetRepository petRepository;
        private readonly PetClassService _petClassService;

        public PetService(PetRepository petRepository, PetClassService petClassService)
        {
            this.petRepository = petRepository;
            _petClassService = petClassService;
        }

        public IEnumerable<Pet> GetAllPets(Guid userId)
        {
            return petRepository.GetPetsByUserId(userId.ToString());
        }

        public Pet CreatePet(Guid userId, PetCreationRequest petRequest)
        {
            var pet = new Pet
            {
                Id = Guid.NewGuid().ToString(),
                UserId = userId.ToString(),
                Name = petRequest.Name,
                Class = petRequest.Class,
                Level = 1,
                Stats = PetStats.BuildFromClass(petRequest.Class),
                Resources = new Resources(),
                ActionSince = DateTime.UtcNow,
                PetAction = PetActionGather.IDLE,
                IsDead = false
            };

            return petRepository.CreatePet(pet);
        }

        public Pet UpdatePetAction(string petId, string userId, PetUpdateActionRequest actionRequest)
        {
            var pet = petRepository.GetPetById(petId, userId);
            if (pet == null)
            {
                throw new Exception("Pet not found");
            }

            if (actionRequest.Action.HasValue)
            {
                // not implemented
            }
            else if (actionRequest.PetActionGather.HasValue)
            {
                pet.PetAction = actionRequest.PetActionGather.Value;
                pet.ActionSince = DateTime.UtcNow;

                return petRepository.UpdatePetAction(pet);
            }

            return pet;
        }

        public Resources GetGatheredResources(string petId, string userId)
        {
            var pet = petRepository.GetPetById(petId, userId);

            if (pet == null)
            {
                throw new Exception("Pet not found");
            }

            return _petClassService.CalculateGatheredResources(pet.Stats, pet.Level, pet.PetAction, pet.ActionSince);
        }

        public Pet UpdatePetResources(string petId, string userId)
        {
            var pet = petRepository.GetPetById(petId, userId);
            if (pet == null)
            {
                throw new Exception("Pet not found");
            }

            var gatheredResources = _petClassService.CalculateGatheredResources(pet.Stats, pet.Level, pet.PetAction, pet.ActionSince);

            pet.Resources.Wisdom += gatheredResources.Wisdom;
            pet.Resources.Gold += gatheredResources.Gold;
            pet.Resources.Food += gatheredResources.Food;
            pet.Resources.Junk += gatheredResources.Junk;
            pet.ActionSince = DateTime.UtcNow;

            return petRepository.UpdatePetResources(pet);
        }
    }
}