// ==========================================================================
//  Squidex Headless CMS
// ==========================================================================
//  Copyright (c) Squidex UG (haftungsbeschraenkt)
//  All rights reserved. Licensed under the MIT license.
// ==========================================================================

using System.Runtime.Serialization;
using Squidex.Domain.Apps.Core.Apps;
using Squidex.Domain.Apps.Core.Assets;
using Squidex.Domain.Apps.Core.Contents;
using Squidex.Domain.Apps.Events.Apps;
using Squidex.Infrastructure;
using Squidex.Infrastructure.Commands;
using Squidex.Infrastructure.EventSourcing;
using Squidex.Infrastructure.Reflection;
using Squidex.Infrastructure.States;

namespace Squidex.Domain.Apps.Entities.Apps.DomainObject
{
    public partial class AppDomainObject
    {
        [CollectionName("Apps")]
        public sealed class State : DomainObjectState<State>, IAppEntity
        {
            public string Name { get; set; }

            public string Label { get; set; }

            public string Description { get; set; }

            public Roles Roles { get; set; } = Roles.Empty;

            public AppImage? Image { get; set; }

            public AppPlan? Plan { get; set; }

            public AppClients Clients { get; set; } = AppClients.Empty;

            public AppSettings Settings { get; set; } = AppSettings.Empty;

            public AppContributors Contributors { get; set; } = AppContributors.Empty;

            public AssetScripts AssetScripts { get; set; } = new AssetScripts();

            public LanguagesConfig Languages { get; set; } = LanguagesConfig.English;

            public Workflows Workflows { get; set; } = Workflows.Empty;

            public bool IsDeleted { get; set; }

            [IgnoreDataMember]
            public DomainId UniqueId
            {
                get => Id;
            }

            public override bool ApplyEvent(IEvent @event)
            {
                switch (@event)
                {
                    case AppCreated e:
                        {
                            Id = e.AppId.Id;

                            SimpleMapper.Map(e, this);

                            return true;
                        }

                    case AppUpdated e when Is.Change(Label, e.Label) || Is.Change(Description, e.Description):
                        {
                            SimpleMapper.Map(e, this);

                            return true;
                        }

                    case AppSettingsUpdated e when Is.Change(Settings, e.Settings):
                        return UpdateSettings(e.Settings);

                    case AppPlanChanged e when Is.Change(Plan?.PlanId, e.PlanId):
                        return UpdatePlan(e.ToPlan());

                    case AppAssetsScriptsConfigured e when Is.Change(e.Scripts, AssetScripts):
                        return UpdateAssetScripts(e.Scripts);

                    case AppPlanReset e when Plan != null:
                        return UpdatePlan(null);

                    case AppImageUploaded e:
                        return UpdateImage(e.Image);

                    case AppImageRemoved e when Image != null:
                        return UpdateImage(null);

                    case AppContributorAssigned e:
                        return UpdateContributors(e, (e, c) => c.Assign(e.ContributorId, e.Role));

                    case AppContributorRemoved e:
                        return UpdateContributors(e, (e, c) => c.Remove(e.ContributorId));

                    case AppClientAttached e:
                        return UpdateClients(e, (e, c) => c.Add(e.Id, e.Secret, e.Role));

                    case AppClientUpdated e:
                        return UpdateClients(e, (e, c) => c.Update(e.Id, e.Name, e.Role, e.ApiCallsLimit, e.ApiTrafficLimit, e.AllowAnonymous));

                    case AppClientRevoked e:
                        return UpdateClients(e, (e, c) => c.Revoke(e.Id));

                    case AppWorkflowAdded e:
                        return UpdateWorkflows(e, (e, w) => w.Add(e.WorkflowId, e.Name));

                    case AppWorkflowUpdated e:
                        return UpdateWorkflows(e, (e, w) => w.Update(e.WorkflowId, e.Workflow));

                    case AppWorkflowDeleted e:
                        return UpdateWorkflows(e, (e, w) => w.Remove(e.WorkflowId));

                    case AppRoleAdded e:
                        return UpdateRoles(e, (e, r) => r.Add(e.Name));

                    case AppRoleUpdated e:
                        return UpdateRoles(e, (e, r) => r.Update(e.Name, e.ToPermissions(), e.Properties));

                    case AppRoleDeleted e:
                        return UpdateRoles(e, (e, r) => r.Remove(e.Name));

                    case AppLanguageAdded e:
                        return UpdateLanguages(e, (e, l) => l.Set(e.Language));

                    case AppLanguageRemoved e:
                        return UpdateLanguages(e, (e, l) => l.Remove(e.Language));

                    case AppLanguageUpdated e:
                        return UpdateLanguages(e, (e, l) =>
                        {
                            l = l.Set(e.Language, e.IsOptional, e.Fallback);

                            if (e.IsMaster)
                            {
                                l = Languages.MakeMaster(e.Language);
                            }

                            return l;
                        });

                    case AppDeleted:
                        {
                            Plan = null;

                            IsDeleted = true;

                            return true;
                        }
                }

                return false;
            }

            private bool UpdateContributors<T>(T @event, Func<T, AppContributors, AppContributors> update)
            {
                var previous = Contributors;

                Contributors = update(@event, previous);

                return !ReferenceEquals(previous, Contributors);
            }

            private bool UpdateClients<T>(T @event, Func<T, AppClients, AppClients> update)
            {
                var previous = Clients;

                Clients = update(@event, previous);

                return !ReferenceEquals(previous, Clients);
            }

            private bool UpdateLanguages<T>(T @event, Func<T, LanguagesConfig, LanguagesConfig> update)
            {
                var previous = Languages;

                Languages = update(@event, previous);

                return !ReferenceEquals(previous, Languages);
            }

            private bool UpdateRoles<T>(T @event, Func<T, Roles, Roles> update)
            {
                var previous = Roles;

                Roles = update(@event, previous);

                return !ReferenceEquals(previous, Roles);
            }

            private bool UpdateWorkflows<T>(T @event, Func<T, Workflows, Workflows> update)
            {
                var previous = Workflows;

                Workflows = update(@event, previous);

                return !ReferenceEquals(previous, Workflows);
            }

            private bool UpdateImage(AppImage? image)
            {
                Image = image;

                return true;
            }

            private bool UpdateAssetScripts(AssetScripts? scripts)
            {
                AssetScripts = scripts ?? new AssetScripts();

                return true;
            }

            private bool UpdateSettings(AppSettings settings)
            {
                Settings = settings;

                return true;
            }

            private bool UpdatePlan(AppPlan? plan)
            {
                Plan = plan;

                return true;
            }
        }
    }
}