using PostFundManagement.Application.Abstractions;
using PostFundManagement.Application.Abstractions.Services;
using PostFundManagement.Application.Extensions;
using PostFundManagement.Application.Services.Shared;
using PostFundManagement.Domain;
using PostFundManagement.Domain.Models;
using static PostFundManagement.Domain.Extensions.Constants;

namespace PostFundManagement.Application.Services.Users;

public sealed class UserCacheService(UserService service, IDistributedCache cache, 
    IFeatureManager featureManager) : ServiceCacheBase, IUserService
{
    public async Task<Result<User>> GetUserAsync(Guid userId, CancellationToken cancellationToken) =>
        await Result.Try((Func<Task<Result<User>>>)(async () =>
        {
            if (!await featureManager.IsEnabledAsync(ServiceCachingFeature))
                return await service.GetUserAsync(userId, cancellationToken);

            var cacheKey = HashService.ToMd5Hash($"getuser-{userId}").Value;

            var cached = await cache.GetStringAsync(cacheKey, cancellationToken);

            if(string.IsNullOrWhiteSpace(cached))
            {
                var userResult = await service.GetUserAsync(userId, cancellationToken);

                if (userResult.IsFailed) return userResult;

                await cache.SetStringAsync(cacheKey, userResult.Value.ToJson(), cacheOptions, cancellationToken);

                return userResult;
            }

            return Result.Ok(cached.FromJson<User>());
        }));

    public async Task<Result<User[]>> GetUsersAsync(Pagination pagination, UserFilterRequest request, CancellationToken cancellationToken = default) =>
        await Result.Try((Func<Task<Result<User[]>>>)(async () =>
        {
            if (!await featureManager.IsEnabledAsync(ServiceCachingFeature))
                return await service.GetUsersAsync(pagination, request, cancellationToken);

            var cacheKey = HashService.ToMd5Hash($"getusers-{pagination.Page}-{pagination.PageSize}-" +
                $"{request.Email}-{request.Status}-{request.SortBy}-{request.SortDescending}").Value;

            var cached = await cache.GetStringAsync(cacheKey, cancellationToken);

            if (string.IsNullOrWhiteSpace(cached))
            {
                var usersResult = await service.GetUsersAsync(pagination, request, cancellationToken);

                if (usersResult.IsFailed) return usersResult;

                await cache.SetStringAsync(cacheKey, usersResult.Value.ToJson(), 
                    cacheOptions, cancellationToken);

                return usersResult;
            }

            return Result.Ok(cached.FromJson<User[]>());
        }));

    public async Task<Result> SyncUserAsync(Guid userId, string email, string role, CancellationToken cancellationToken = default) =>
        await service.SyncUserAsync(userId, email, role, cancellationToken);
        
    public async Task<Result> UpdateUserStatusAsync(Guid userId, ActivityStatus status, CancellationToken cancellationToken = default) =>
        await service.UpdateUserStatusAsync(userId, status, cancellationToken);
}