using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Infrastructure;
using Microsoft.EntityFrameworkCore.Migrations;
using Microsoft.Extensions.DependencyInjection;
using Quadarax.Application.QLiberace.Base;
using Quadarax.Foundation.Core.QConsole;

namespace Quadarax.Application.QLiberace.Console.Commands.Base
{
    internal abstract class DbMigrationCommand : DbContextCommand
    {
        #region *** Properties ***

        #endregion

        #region *** Constructor ***
        protected DbMigrationCommand(Engine engine) : base(engine)
        {
        }
        #endregion
        
        #region *** EXECUTE ***
        #endregion

        #region *** Private operations ***
        //src: https://makolyte.com/ef-core-apply-migrations-programmatically/
        protected void ApplyMigration(QlbrcDbContext context, string? migrationCode = null)
        {
            var migrator = context.GetInfrastructure().GetService<IMigrator>();
            if (migrator == null)
                throw new InvalidOperationException($"Cannot obtain service IMigrator from EFC6 infrastructure.");
            
            migrator.Migrate(migrationCode);
            var lastAppliedMigration = (context.Database.GetAppliedMigrations()).Last();
            WriteInfo($"You're now on schema version: {lastAppliedMigration}");
        }

        protected bool CheckPendingMigrations(QlbrcDbContext context)
        {
            return context.Database.GetPendingMigrations().Any();
        }
        #endregion

    }
}