using AutoMapper;
using LANCommander.Server.Data;
using LANCommander.Server.Data.Models;
using LANCommander.Helpers;
using LANCommander.SDK.Enums;
using Microsoft.AspNetCore.Http;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Logging;
using ZiggyCreatures.Caching.Fusion;
using LANCommander.SDK;

namespace LANCommander.Server.Services
{
    public sealed class GameSaveService(
        ILogger<GameSaveService> logger,
        SettingsProvider<Settings.Settings> settingsProvider,
        IFusionCache cache,
        IMapper mapper,
        IHttpContextAccessor httpContextAccessor,
        IDbContextFactory<DatabaseContext> contextFactory,
        StorageLocationService storageLocationService) : BaseDatabaseService<GameSave>(logger, settingsProvider, cache, mapper, httpContextAccessor, contextFactory)
    {
        public override async Task<GameSave> AddAsync(GameSave entity)
        {
            return await base.AddAsync(entity, async context =>
            {
                await context.UpdateRelationshipAsync(gs => gs.Game);
                await context.UpdateRelationshipAsync(gs => gs.StorageLocation);
                await context.UpdateRelationshipAsync(gs => gs.User);
            });
        }

        public override async Task<GameSave> UpdateAsync(GameSave entity)
        {
            return await base.UpdateAsync(entity, async context =>
            {
                await context.UpdateRelationshipAsync(gs => gs.Game);
                await context.UpdateRelationshipAsync(gs => gs.StorageLocation);
                await context.UpdateRelationshipAsync(gs => gs.User);
            });
        }
        
        public override async Task DeleteAsync(GameSave entity)
        {
            FileHelpers.DeleteIfExists(await GetSavePathAsync(entity.Id));

            await base.DeleteAsync(entity);
        }
        
        public async Task<string?> GetSavePathAsync(Guid gameId, Guid userId)
        {
            var save = await SortBy(gs => gs.CreatedOn, Data.Enums.SortDirection.Descending).FirstOrDefaultAsync(gs => gs.GameId == gameId && gs.UserId == userId);

            if (save == null)
                return null;

            return GetSavePath(save);
        }

        public async Task<string?> GetSavePathAsync(Guid id)
        {
            // Use get with predicate to avoid async
            var save = await FirstOrDefaultAsync(gs => gs.Id == id);

            if (save == null)
                return null;

            return GetSavePath(save);
        }

        public string GetSavePath(GameSave save)
        {
            var gameId = save.GameId ?? throw new InvalidOperationException($"No game ID is available for save {save.Id}");
            return AppPaths.ResolveStorageLocationPath(save.StorageLocation.Path, save.UserId.ToString(), gameId.ToString(), save.Id.ToString());
        }

        public async Task<StorageLocation> GetDefaultStorageLocationAsync()
        {
            return await storageLocationService.FirstOrDefaultAsync(l => l.Type == StorageLocationType.Save && l.Default);
        }
    }
}