using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.DependencyInjection.Extensions;
using Microsoft.EntityFrameworkCore;
using DigitalData.Core.Infrastructure;
using EnvelopeGenerator.Domain.Entities;
using Microsoft.Extensions.Configuration;
using Dapper;
using System.ComponentModel.DataAnnotations.Schema;
using System.Reflection;
using DigitalData.UserManager.Domain.Entities;
#if NET
using CommandDotNet.Execution;
using EnvelopeGenerator.Infrastructure.Repositories;
using EnvelopeGenerator.Infrastructure.Executor;
using EnvelopeGenerator.Application.Common.Interfaces.Repositories;
using EnvelopeGenerator.Application.Common.Interfaces.SQLExecutor;
using DigitalData.EmailProfilerDispatcher.Abstraction.Entities;
#elif NETFRAMEWORK
using System;
#endif

namespace EnvelopeGenerator.Infrastructure
{
    public static class DIExtensions
    {
        /// <summary>
        /// Registers the required repositories for the Envelope Generator service to the given <see cref="IServiceCollection"/>.
        /// This method adds the repositories for various envelope-related entities, such as configuration, document receivers, envelopes, and users,
        /// as scoped services to the dependency injection container. Optionally, it can also configure the <see cref="EGDbContext"/> 
        /// with the provided database context options if specified.
        /// </summary>
        /// <param name="services">The <see cref="IServiceCollection"/> to which the services are added.</param>
        /// <param name="dbContextOptions">An optional action to configure the <see cref="DbContextOptionsBuilder"/> for the <see cref="EGDbContext"/>. 
        /// If not provided, the <see cref="EGDbContext"/> will not be configured.</param>
        /// <returns>The updated <see cref="IServiceCollection"/> with the added repository services.</returns>
        /// <remarks>
        /// This method ensures that the repositories are registered as scoped services, meaning that a new instance of each repository 
        /// will be created per HTTP request (or per scope) within the dependency injection container.
        /// </remarks>
        [Obsolete("Use IRepository")]
        public static IServiceCollection AddEnvelopeGeneratorInfrastructureServices(this IServiceCollection services,
            Action<Config> options
#if NET
            , IConfiguration? sqlExecutorConfiguration = null,
            Action<SQLExecutorParams>? sqlExecutorConfigureOptions = null
#endif
            )
        {
            // configure custom options
            options(new Config(services));
#if NET
            services.TryAddScoped<IConfigRepository, ConfigRepository>();
            services.TryAddScoped<IDocumentReceiverElementRepository, DocumentReceiverElementRepository>();
            services.TryAddScoped<IEnvelopeDocumentRepository, EnvelopeDocumentRepository>();
            services.TryAddScoped<IDocumentReceiverElementRepository, DocumentReceiverElementRepository>();
            services.TryAddScoped<IDocumentStatusRepository, DocumentStatusRepository>();
            services.TryAddScoped<IEmailTemplateRepository, EmailTemplateRepository>();
            services.TryAddScoped<IEnvelopeRepository, EnvelopeRepository>();
            services.TryAddScoped<IEnvelopeHistoryRepository, EnvelopeHistoryRepository>();
            services.TryAddScoped<IEnvelopeReceiverRepository, EnvelopeReceiverRepository>();
            services.TryAddScoped<IEnvelopeTypeRepository, EnvelopeTypeRepository>();
            services.TryAddScoped<IReceiverRepository, ReceiverRepository>();
            services.TryAddScoped<IEnvelopeReceiverReadOnlyRepository, EnvelopeReceiverReadOnlyRepository>();
#endif

            services.AddDbRepository(opt =>
            {
                // scan EnvelopeGenerator
                opt.RegisterFromAssembly<EGDbContext>(typeof(Config).Assembly);

                // scan UserManager
                opt.RegisterFromAssembly<EGDbContext>(typeof(User).Assembly);

#if NET
                // scan EmailProfilerDispatcher
                opt.RegisterFromAssembly<EGDbContext>(typeof(EmailOut).Assembly);
#endif
            });

#if NET
            services.AddSQLExecutor<Envelope>();
            services.AddSQLExecutor<Receiver>();
            services.AddSQLExecutor<Document>();
            services.AddSQLExecutor<Signature>();
            services.AddSQLExecutor<DocumentStatus>();

            SetDapperTypeMap<Envelope>();
            SetDapperTypeMap<User>();
            SetDapperTypeMap<Receiver>();
            SetDapperTypeMap<Document>();
            SetDapperTypeMap<Signature>();
            SetDapperTypeMap<DocumentStatus>();

            services.AddScoped<IEnvelopeExecutor, EnvelopeExecutor>();
            services.AddScoped<IEnvelopeReceiverExecutor, EnvelopeReceiverExecutor>();
            services.AddScoped<IDocumentExecutor, DocumentExecutor>();

            if (sqlExecutorConfiguration is not null || sqlExecutorConfigureOptions is not null)
                services.AddSQLExecutor(sqlExecutorConfiguration, sqlExecutorConfigureOptions);
#endif

            return services;
        }

#if NET
        public static IServiceCollection AddSQLExecutor(this IServiceCollection services, IConfiguration? configuration = null, Action<SQLExecutorParams>? configureOptions = null)
        {
            if (configuration is not null && configureOptions is not null)
                throw new InvalidOperationException("Cannot use both 'configuration' and 'configureOptions'. Only one should be provided.");

            if (configuration is not null)
                services.Configure<SQLExecutorParams>(configuration);

            if (configureOptions is not null)
                services.Configure(configureOptions);

            return services.AddSingleton<ISQLExecutor, SQLExecutor>();
        }

        private static void SetDapperTypeMap<TModel>()
        {
            Dapper.SqlMapper.SetTypeMap(typeof(TModel), new CustomPropertyTypeMap(
                typeof(TModel),
                (type, columnName) =>
                {
                    return type.GetProperties().FirstOrDefault(prop =>
                    {
                        var attr = prop.GetCustomAttribute<ColumnAttribute>();
                        return attr != null && string.Equals(attr.Name, columnName, StringComparison.OrdinalIgnoreCase)
                            || string.Equals(prop.Name, columnName, StringComparison.OrdinalIgnoreCase);
                    })!;
                }
            ));
        }

        public static IServiceCollection AddSQLExecutor<T>(this IServiceCollection services, IConfiguration? configuration = null, Action<SQLExecutorParams>? configureOptions = null) where T : class
        {
            if (configuration is not null && configureOptions is not null)
                throw new InvalidOperationException("Cannot use both 'configuration' and 'configureOptions'. Only one should be provided.");

            if (configuration is not null)
                services.Configure<SQLExecutorParams>(configuration);

            services.AddScoped<ISQLExecutor<T>, SQLExecutor<T>>();

            var interfaceType = typeof(ISQL<>);
            var targetGenericType = interfaceType.MakeGenericType(typeof(T));

            var implementations = AppDomain.CurrentDomain.GetAssemblies()
                .SelectMany(a =>
                {
                    try { return a.GetTypes(); }
                    catch { return Array.Empty<Type>(); }
                })
                .Where(t =>
                    t is { IsClass: true, IsAbstract: false } &&
                    t.GetInterfaces().Any(i =>
                        i.IsGenericType &&
                        i.GetGenericTypeDefinition() == interfaceType &&
                        i.GenericTypeArguments[0] == typeof(T)
                    )
                );

            foreach (var impl in implementations)
            {
                services.AddSingleton(impl);
            }

            return services;
        }
#endif

        public class Config
        {
            private readonly IServiceCollection _services;

            internal Config(IServiceCollection services)
            {
                _services = services;
            }

            public void ConfigureDbTriggerParams(IConfiguration configuration)
            {
                _services.Configure<DbTriggerParams>(configuration.GetSection(nameof(DbTriggerParams)));
            }

            public void ConfigureDbTriggerParams(Action<DbTriggerParams> configureOptions)
            {
                _services.Configure(configureOptions);
            }

            public void AddDbContext(Action<DbContextOptionsBuilder> dbContextOptions)
            {
                _services.AddDbContext<EGDbContext>(dbContextOptions);
            }

            public void AddDbContext(Action<IServiceProvider, DbContextOptionsBuilder> dbContextOptions)
            {
                _services.AddDbContext<EGDbContext>(dbContextOptions);
            }
        }
    }
}