using System.Collections;
using System.Data;
using IwbZero.ToolCommon.StringModel;

namespace IwbZero.IwbDataQuery
{
    public class IwbLinkQuery
    {
        private readonly ArrayList _CascadeFields;
        private readonly string _ChildLinkFields;
        public IwbQuery _ChildQuery { get; private set; }
        private readonly ArrayList _LinkFields;
        private readonly string _MyLinkFields;

        public IwbLinkQuery(string pcLinkMappings, string pcCascadeValues, IwbQuery poChildQuery)
        {
            _LinkFields = pcLinkMappings.MappingToArrayList();
            _CascadeFields = pcCascadeValues.MappingToArrayList();
            _MyLinkFields = "";
            _ChildLinkFields = "";
            foreach (IwbIdName name in _LinkFields)
            {
                _MyLinkFields = _MyLinkFields + ((_MyLinkFields == "") ? "" : ",") + name.Name;
                _ChildLinkFields = _ChildLinkFields + ((_ChildLinkFields == "") ? "" : ",") + name.Id;
            }
            _ChildQuery = poChildQuery;
        }

        public void CascadeFieldValues(IwbQuery poParent, DataRow poParentRow, string pcColumn, string pcNewValue, string pcOldValue)
        {
            pcColumn = pcColumn.UAndT();
            foreach (IwbIdName name in _CascadeFields)
            {
                if (name.Name.UAndT() == pcColumn)
                {
                    CascadeValueForField(poParent, poParentRow, pcColumn, pcNewValue, name.Id);
                }
            }
            foreach (IwbIdName name2 in _LinkFields)
            {
                if (name2.Name.UAndT() == pcColumn)
                {
                    CascadeValueForField(poParent, poParentRow, pcColumn, pcNewValue, name2.Id);
                }
            }
        }

        private void CascadeValueForField(IwbQuery poParent, DataRow poParentRow, string pcParentColumn, string pcNewValue, string pcChildColumn)
        {
            string fieldValues = poParent.GetFieldValues(_MyLinkFields, poParentRow);
            foreach (DataRow row in _ChildQuery.CurrentTable.Rows)
            {
                if (((row.RowState != DataRowState.Deleted) && (row.RowState != DataRowState.Detached)) && _ChildQuery.IsValuesMatch(row, _ChildLinkFields, fieldValues))
                {
                    _ChildQuery.SetField(pcChildColumn, pcNewValue, row);
                }
            }
        }
    }
}