using OpenDBDiff.Abstractions.Schema;
using OpenDBDiff.Abstractions.Schema.Model;
using System;

namespace OpenDBDiff.SqlServer.Schema.Model
{
    public class User : SQLServerSchemaBase
    {
        public User(ISchemaBase parent)
            : base(parent, ObjectType.User)
        {
        }

        public override string FullName
        {
            get { return "[" + Name + "]"; }
        }

        public string Login { get; set; }

        public override string ToSql()
        {
            string sql = "";
            sql += "CREATE USER ";
            sql += FullName + " ";
            if (!String.IsNullOrEmpty(Login))
                sql += "FOR LOGIN [" + Login + "] ";
            else
                sql += "WITHOUT LOGIN ";
            if (!String.IsNullOrEmpty(Owner))
                sql += "WITH DEFAULT_SCHEMA=[" + Owner + "]";
            return sql.Trim() + "\r\nGO\r\n";
        }

        public override string ToSqlDrop()
        {
            return "DROP USER " + FullName + "\r\nGO\r\n";
        }

        public override string ToSqlAdd()
        {
            return ToSql();
        }

        public override SQLScriptList ToSqlDiff(System.Collections.Generic.ICollection<ISchemaBase> schemas)
        {
            SQLScriptList listDiff = new SQLScriptList();

            if (this.Status == ObjectStatus.Drop)
            {
                listDiff.Add(ToSqlDrop(), 0, ScriptAction.DropUser);
            }
            if (this.Status == ObjectStatus.Create)
            {
                listDiff.Add(ToSql(), 0, ScriptAction.AddUser);
            }
            if ((this.Status & ObjectStatus.Alter) == ObjectStatus.Alter)
            {
                listDiff.Add(ToSqlDrop(), 0, ScriptAction.DropUser);
                listDiff.Add(ToSql(), 0, ScriptAction.AddUser);
            }
            return listDiff;
        }

        public bool Compare(User obj)
        {
            if (obj == null) throw new ArgumentNullException("destination");
            if (!this.Login.Equals(obj.Login)) return false;
            if (!this.Owner.Equals(obj.Owner)) return false;
            return true;
        }
    }
}