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

using CommandDotNet;
using FluentValidation;
using FluentValidation.Attributes;
using Squidex.Translator.Processes;
using Squidex.Translator.State;

#pragma warning disable CA1822 // Mark members as static

namespace Squidex.Translator;

public class Commands
{
    [Command("info", Description = "Shows information about the translator.")]
    public void Info()
    {
        var version = typeof(Commands).Assembly.GetName().Version;

        Console.WriteLine($"Squidex Translator Version v{version}");
    }

    [Command("translate", Description = "Translates different parts.")]
    [Subcommand]
    public class Translate
    {
        [Command("check-backend", Description = "Check backend files.")]
        public void CheckBackend(TranslateArguments arguments)
        {
            var (folder, service) = Setup(arguments, "backend");

            new CheckBackend(folder, service).Run();
        }

        [Command("check-frontend", Description = "Check frontend files.")]
        public void CheckFrontend(TranslateArguments arguments)
        {
            var (folder, service) = Setup(arguments, "frontend");

            new CheckFrontend(folder, service).Run(arguments.Fix);
        }

        [Command("backend", Description = "Translate backend files.")]
        public void Backend(TranslateArguments arguments)
        {
            var (folder, service) = Setup(arguments, "backend");

            new TranslateBackend(folder, service).Run();
        }

        [Command("templates", Description = "Translate angular templates.")]
        public void Templates(TranslateArguments arguments)
        {
            var (folder, service) = Setup(arguments, "frontend");

            new TranslateTemplates(folder, service).Run(arguments.Report);
        }

        [Command("typescript", Description = "Translate typescript files.")]
        public void Typescript(TranslateArguments arguments)
        {
            var (folder, service) = Setup(arguments, "frontend");

            new TranslateTypescript(folder, service).Run();
        }

        [Command("gen-backend", Description = "Generate the backend translations.")]
        public void GenerateBackend(TranslateArguments arguments)
        {
            var (folder, service) = Setup(arguments, "backend");

            new GenerateBackendResources(folder, service).Run();
        }

        [Command("gen-frontend", Description = "Generate the frontend translations.")]
        public void GenerateFrontend(TranslateArguments arguments)
        {
            var (folder, service) = Setup(arguments, "frontend");

            new GenerateFrontendResources(folder, service).Run();
        }

        [Command("clean-backend", Description = "Clean the backend translations.")]
        public void CleanBackend(TranslateArguments arguments)
        {
            var (_, service) = Setup(arguments, "backend");

            Helper.CleanOtherLocales(service);

            service.Save();
        }

        [Command("clean-frontend", Description = "Clean the frontend translations.")]
        public void CleanFrontend(TranslateArguments arguments)
        {
            var (_, service) = Setup(arguments, "frontend");

            Helper.CleanOtherLocales(service);

            service.Save();
        }

        [Command("gen-keys", Description = "Generate the keys for translations.")]
        public void GenerateBackendKeys(TranslateArguments arguments)
        {
            var (backendFolder, serviceBackend) = Setup(arguments, "backend");

            new GenerateKeys(backendFolder, serviceBackend, "backend_keys.json").Run();

            var (frontendFolder, frontendService) = Setup(arguments, "frontend");

            new GenerateKeys(frontendFolder, frontendService, "frontend_keys.json").Run();
        }

        [Command("migrate-backend", Description = "Migrate the backend files.")]
        public void MigrateBackend(TranslateArguments arguments)
        {
            var (_, service) = Setup(arguments, "backend");

            service.Migrate();
        }

        [Command("migrate-frontend", Description = "Migrate the frontend files.")]
        public void MigrateFrontend(TranslateArguments arguments)
        {
            var (_, service) = Setup(arguments, "frontend");

            service.Migrate();
        }

        private static (DirectoryInfo, TranslationService) Setup(TranslateArguments arguments, string fileName)
        {
            if (!Directory.Exists(arguments.Folder))
            {
                throw new ArgumentException("Folder does not exist.", nameof(arguments));
            }

            var supportedLocales = new string[] { "en", "nl", "it", "zh", "pt", "fr", "de" };

            var locales = supportedLocales;

            if (arguments.Locales != null && arguments.Locales.Any())
            {
                locales = supportedLocales.Intersect(arguments.Locales).ToArray();
            }

            if (locales.Length == 0)
            {
                locales = supportedLocales;
            }

            var translationsDirectory = new DirectoryInfo(Path.Combine(arguments.Folder, "backend", "i18n"));
            var translationsService = new TranslationService(translationsDirectory, fileName, locales, arguments.SingleWords);

            return (new DirectoryInfo(arguments.Folder), translationsService);
        }
    }

    [Validator(typeof(Validator))]
    public sealed class TranslateArguments : IArgumentModel
    {
        [Operand("folder", Description = "The squidex folder.")]
        public string Folder { get; set; }

        [Option('s', "single", Description = "Single words only.")]
        public bool SingleWords { get; set; }

        [Option('r', "report")]
        public bool Report { get; set; }

        [Option("fix")]
        public bool Fix { get; set; }

        [Option('l', "locale")]
        public IEnumerable<string> Locales { get; set; } = Array.Empty<string>();

        public sealed class Validator : AbstractValidator<TranslateArguments>
        {
            public Validator()
            {
                RuleFor(x => x.Folder).NotEmpty();
            }
        }
    }
}