using System;
using System.Collections.Generic;
using System.Data;

namespace DatabaseExport
{
    public class TestObjectTemplateCollection
    {

        private static volatile TestObjectTemplateCollection _testObjectCollection;
        public static TestObjectTemplateCollection TemplateCollection => _testObjectCollection ?? (_testObjectCollection = new TestObjectTemplateCollection());

        public GroupTemplateTableInfo[] GetAllTemplates(bool bIncludeEmbeddedAndSysBuilt = true)
        {
            var templates = new List<GroupTemplateTableInfo>();

            using (var sql = DbOperations.GetCommand())
            {
                if (bIncludeEmbeddedAndSysBuilt)
                {
                    sql.CommandText =
                        "SELECT TemplateName, Description, LastModifiedBy, TestObjectType, LastModified, SysBuilt, Embedded from tblTestObjectTemplates";
                }
                else
                {
                    sql.CommandText = "SELECT TemplateName, Description, LastModifiedBy, TestObjectType, LastModified, SysBuilt, Embedded from tblTestObjectTemplates WHERE (Embedded=0 OR Embedded is NULL) AND SysBuilt=0";
                }

                using (var ds = DbOperations.Connection.QueryDataSet(sql))
                {
                    foreach (DataRow dr in ds.Tables[0].Rows)
                    {
                        var templateName = (string)dr["TemplateName"];
                        var templateDescription = (string)dr["Description"];
                        var lastModifiedBy = (string)dr["LastModifiedBy"];
                        var testObjectType = (string)dr["TestObjectType"];
                        var lastModified = Convert.ToDateTime(dr["LastModified"]);
                        var sysBuilt = Convert.ToBoolean(dr["SysBuilt"]);
                        var embeddedValue = dr["Embedded"];
                        var embedded = false;
                        if (!DBNull.Value.Equals(embeddedValue))
                        {
                            embedded = Convert.ToBoolean(dr["Embedded"]);
                        }

                        var isoSupportLevel =
                        (testObjectType.Contains(TestObjectTemplate.NON_ISO_TESTOBJECT_CHANNEL_TYPE) ||
                         testObjectType.Contains(TestObjectTemplateChannel.NONISOCHANNELTYPE))
                            ? SerializedSettings.ISOSupportLevels.NO_ISO
                            : SerializedSettings.ISOSupportLevels.ISO_ONLY;

                        templates.Add(new GroupTemplateTableInfo(templateName, isoSupportLevel, sysBuilt,
                            templateDescription, lastModified, lastModifiedBy, embedded));
                    }
                }

            }
            return templates.ToArray();
        }
        private static volatile TestObjectTemplate _sysBuiltTestObjectTemplate;
        public TestObjectTemplate SysBuiltTestObjectTemplate => _sysBuiltTestObjectTemplate;

        public TestObjectTemplate GetTemplate(string templateId)
        {
            //if (null == Application.Current) { return null; }
            var db = ISO13499FileDb.IsoDb;
            var template = ISO.TestObjectTemplate.GetTemplate(ref db, templateId);
            if (null == template)
            {
                return new TestObjectTemplate();
            }
            else
            {
                return new TestObjectTemplate(template, ref db);
            }
        }
    }
}