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

using System;
using System.ComponentModel.DataAnnotations;
using NodaTime;
using Squidex.Areas.Api.Controllers.Contents;
using Squidex.Domain.Apps.Entities.Schemas;
using Squidex.Infrastructure;
using Squidex.Infrastructure.Reflection;
using Squidex.Shared;
using Squidex.Web;

namespace Squidex.Areas.Api.Controllers.Schemas.Models
{
    public class SchemaDto : Resource, IGenerateETag
    {
        /// <summary>
        /// The id of the schema.
        /// </summary>
        public Guid Id { get; set; }

        /// <summary>
        /// The name of the schema. Unique within the app.
        /// </summary>
        [Required]
        [RegularExpression("^[a-z0-9]+(\\-[a-z0-9]+)*$")]
        public string Name { get; set; }

        /// <summary>
        /// The name of the category.
        /// </summary>
        public string Category { get; set; }

        /// <summary>
        /// The schema properties.
        /// </summary>
        [Required]
        public SchemaPropertiesDto Properties { get; set; } = new SchemaPropertiesDto();

        /// <summary>
        /// Indicates if the schema is a singleton.
        /// </summary>
        public bool IsSingleton { get; set; }

        /// <summary>
        /// Indicates if the schema is published.
        /// </summary>
        public bool IsPublished { get; set; }

        /// <summary>
        /// The user that has created the schema.
        /// </summary>
        [Required]
        public RefToken CreatedBy { get; set; }

        /// <summary>
        /// The user that has updated the schema.
        /// </summary>
        [Required]
        public RefToken LastModifiedBy { get; set; }

        /// <summary>
        /// The date and time when the schema has been created.
        /// </summary>
        public Instant Created { get; set; }

        /// <summary>
        /// The date and time when the schema has been modified last.
        /// </summary>
        public Instant LastModified { get; set; }

        /// <summary>
        /// The version of the schema.
        /// </summary>
        public long Version { get; set; }

        public static SchemaDto FromSchema(ISchemaEntity schema, ApiController controller, string app)
        {
            var result = new SchemaDto();

            SimpleMapper.Map(schema, result);
            SimpleMapper.Map(schema.SchemaDef, result);
            SimpleMapper.Map(schema.SchemaDef.Properties, result.Properties);

            return result.CreateLinks(controller, app);
        }

        protected virtual SchemaDto CreateLinks(ApiController controller, string app)
        {
            var values = new { app, name = Name };

            AddSelfLink(controller.Url<SchemasController>(x => nameof(x.GetSchema), values));

            if (controller.HasPermission(Permissions.AppContentsRead, app, Name))
            {
                AddGetLink("contents", controller.Url<ContentsController>(x => nameof(x.GetContents), values));
            }

            return this;
        }
    }
}