using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using Vanguard.Api;
using Vanguard.Api.Contracts;
using Vanguard.State;

namespace Vanguard.Meta
{
    /// <summary>Обёртка над мета-эндпоинтами: магазин, коллекция, колоды.</summary>
    public sealed class MetaService
    {
        private readonly ApiClient _api;
        private readonly PlayerState _player;

        public MetaService(ApiClient api, PlayerState player)
        {
            _api = api;
            _player = player;
        }

        public async Task<StoreResponse> GetStoreAsync()
        {
            var store = await _api.GetAsync<StoreResponse>("/api/store");
            _player.ApplyBalances(store.Balances);
            return store;
        }

        public async Task<OnboardingResponse> OnboardAsync(string deckId)
        {
            var response = await _api.PostAsync<OnboardingResponse>(
                "/api/meta/onboarding",
                new OnboardingRequest { DeckId = deckId });

            _player.ApplyBalances(response.Balances);
            _player.MarkOnboarded(response.DeckId);
            return response;
        }

        public async Task<CollectionResponse> GetCollectionAsync()
        {
            var collection = await _api.GetAsync<CollectionResponse>("/api/collection");
            _player.ApplyBalances(collection.Balances);
            return collection;
        }

        public async Task<Balances> DismantleAsync(string printingId, int count)
        {
            var balances = await _api.PostAsync<Balances>(
                "/api/collection/dismantle",
                new DismantleRequest
                {
                    PrintingId = printingId,
                    Count = count,
                    IdempotencyKey = Guid.NewGuid().ToString("N"),
                });

            _player.ApplyBalances(balances);
            return balances;
        }

        public async Task<List<DeckDto>> GetDecksAsync()
        {
            var decks = await _api.GetAsync<List<DeckDto>>("/api/decks");
            return decks ?? new List<DeckDto>();
        }

        public async Task<DeckDto> CreateDeckAsync(string name, List<string> cards) =>
            await _api.PostAsync<DeckDto>(
                "/api/decks",
                new DeckRequest { Name = name, Cards = cards });

        public Task DeleteDeckAsync(Guid deckId) =>
            _api.DeleteAsync("/api/decks/" + deckId.ToString("D"));

        public async Task<DeckValidationResponse> ValidateDeckAsync(Guid deckId, List<string> cards) =>
            await _api.PostAsync<DeckValidationResponse>(
                "/api/decks/" + deckId.ToString("D") + "/validate",
                new DeckRequest { Cards = cards });
    }
}