// ***********************************************************************
// <copyright file="RoleService.cs">
//     AgileWebs
// </copyright>
// ***********************************************************************
using Core.Blueprint.Mongo;
using Core.Blueprint.Redis;
using Core.Blueprint.Redis.Helpers;
using Core.Thalos.BuildingBlocks;
using Core.Thalos.Domain.Contexts.Onboarding.Request;
using Core.Thalos.Provider.Contracts;
using Mapster;
using Microsoft.Extensions.Options;
using MongoDB.Driver;

namespace Core.Thalos.Provider.Providers.Onboarding
{
    /// <summary>
    /// Handles all services and business rules related to <see cref="RoleAdapter"/>.
    /// </summary>
    public class RoleProvider : IRoleProvider
    {
        private readonly CollectionRepository<RoleAdapter> repository;
        private readonly CacheSettings cacheSettings;
        private readonly IRedisCacheProvider cacheProvider;

        public RoleProvider(CollectionRepository<RoleAdapter> repository,
            IRedisCacheProvider cacheProvider,
            IOptions<CacheSettings> cacheSettings
            )
        {
            this.repository = repository;
            this.repository.CollectionInitialization();
            this.cacheSettings = cacheSettings.Value;
            this.cacheProvider = cacheProvider;
        }

        /// <summary>
        /// Creates a new Role.
        /// </summary>
        /// <param name="entity">The Role to be created.</param>
        /// <returns>A <see cref="{Task{RoleAdapter}}"/> representing
        /// the asynchronous execution of the service.</returns>
        public async ValueTask<RoleAdapter> CreateRole(RoleRequest newRole, CancellationToken cancellationToken)
        {
            var roleCollection = newRole.Adapt<RoleAdapter>();

            await repository.InsertOneAsync(roleCollection);

            return roleCollection;
        }

        /// <summary>
        /// Gets an Role by identifier.
        /// </summary>
        /// <param name="id">The Role identifier.</param>
        /// <returns>A <see cref="{Task{RoleAdapter}}"/> representing
        /// the asynchronous execution of the service.</returns>
        public async ValueTask<RoleAdapter> GetRoleById(string _id, CancellationToken cancellationToken)
        {
            var cacheKey = CacheKeyHelper.GenerateCacheKey(this, "GetRoleById", _id);
            var cachedData = await cacheProvider.GetAsync<RoleAdapter>(cacheKey);

            if (cachedData is not null) { return cachedData; }

            var role = await repository.FindByIdAsync(_id);

            await cacheProvider.SetAsync(cacheKey, role);

            return role;
        }

        /// <summary>
        /// Gets all the roles.
        /// </summary>
        /// <returns>A <see cref="{Task{IEnumerbale{RoleAdapter}}}"/> representing
        /// the asynchronous execution of the service.</returns>
        public async ValueTask<IEnumerable<RoleAdapter>> GetAllRoles(CancellationToken cancellationToken)
        {
            var cacheKey = CacheKeyHelper.GenerateCacheKey(this, "GetAllRoles");
            var cachedData = await cacheProvider.GetAsync<IEnumerable<RoleAdapter>>(cacheKey) ?? [];

            if (cachedData.Any()) return cachedData;

            var roles = await repository.AsQueryable();

            await cacheProvider.SetAsync(cacheKey, roles);

            return roles;
        }

        /// <summary>
        /// Changes the status of the role.
        /// </summary>
        /// <param name="id">The role identifier.</param>
        /// <param name="newStatus">The new status of the role.</param>
        /// <returns>A <see cref="{Task{RoleAdapter}}"/> representing
        /// the asynchronous execution of the service.</returns>
        public async ValueTask<RoleAdapter> ChangeRoleStatus(string id, Core.Blueprint.Mongo.StatusEnum newStatus, CancellationToken cancellationToken)
        {
            var entity = await repository.FindByIdAsync(id);
            entity.Status = newStatus;

            await repository.ReplaceOneAsync(entity);

            return entity;
        }

        /// <summary>
        /// Updates a Role by id.
        /// </summary>
        /// <param name="entity">The Role to be updated.</param>
        /// <param name="id">The Role identifier.</param>
        /// <returns>A <see cref="{Task{RoleAdapter}}"/> representing
        /// the asynchronous execution of the service.</returns>
        public async ValueTask<RoleAdapter> UpdateRole(RoleAdapter entity, CancellationToken cancellationToken)
        {
            await repository.ReplaceOneAsync(entity);

            return entity;
        }

        /// <summary>
        /// Adds an application to the role's list of applications.
        /// </summary>
        /// <param name="roleId">The identifier of the role to which the application will be added.</param>
        /// <param name="application">The application enum value to add.</param>
        /// <returns>A <see cref="{Task{RoleAdapter}}"/> representing the asynchronous operation, with the updated role object.</returns>
        public async ValueTask<RoleAdapter> AddApplicationToRole(string roleId, ApplicationsEnum application, CancellationToken cancellationToken)
        {
            var role = await repository.FindOneAsync(
                u => u._Id == roleId &&
                u.Status == Core.Blueprint.Mongo.StatusEnum.Active);

            var updatedApplications = role.Applications.Append(application).Distinct().ToArray();
            role.Applications = updatedApplications;

            await repository.ReplaceOneAsync(role);

            return role;
        }

        /// <summary>
        /// Removes an application from the role's list of applications.
        /// </summary>
        /// <param name="roleId">The identifier of the role from which the application will be removed.</param>
        /// <param name="application">The application enum value to remove.</param>
        /// <returns>A <see cref="{Task{RoleAdapter}}"/> representing the asynchronous operation, with the updated role object.</returns>
        public async ValueTask<RoleAdapter> RemoveApplicationFromRole(string roleId, ApplicationsEnum application, CancellationToken cancellationToken)
        {
            var role = await repository.FindOneAsync(
                u => u._Id == roleId &&
                u.Status == Core.Blueprint.Mongo.StatusEnum.Active);

            var updatedApplications = role.Applications
                    ?.Where(c => c != application)
                    .ToArray();

            role.Applications = updatedApplications;

            await repository.ReplaceOneAsync(role);

            return role;
        }
    }
}