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package com.questdb.query.spi;

import com.questdb.Journal;
import com.questdb.ex.JournalException;
import com.questdb.misc.Interval;
import com.questdb.query.UnorderedResultSet;
import com.questdb.query.api.QueryAllBuilder;
import com.questdb.std.IntList;
import com.questdb.std.ObjList;
import com.questdb.store.MMappedSymbolTable;
import com.questdb.store.SymbolTable;

public class QueryAllBuilderImpl implements QueryAllBuilder {

    private final Journal journal;
    private final IntList symbolKeys = new IntList();
    private final ObjList filterSymbols = new ObjList<>();
    private final IntList filterSymbolKeys = new IntList();
    private String symbol;
    private Interval interval;

    public QueryAllBuilderImpl(Journal journal) {
        this.journal = journal;
    }

    @Override
    public UnorderedResultSet asResultSet() throws JournalException {
        return journal.iteratePartitionsDesc(new QueryAllResultSetBuilder(interval, symbol, symbolKeys, filterSymbols, filterSymbolKeys));
    }

    @Override
    public QueryAllBuilder filter(String symbol, String value) {
        MMappedSymbolTable tab = journal.getSymbolTable(symbol);
        int key = tab.get(value);
        filterSymbols.add(symbol);
        filterSymbolKeys.add(key);
        return this;
    }

    @Override
    public void resetFilter() {
        filterSymbols.clear();
        filterSymbolKeys.clear();
    }

    @Override
    public QueryAllBuilder slice(Interval interval) {
        setInterval(interval);
        return this;
    }

    public void setSymbol(String symbol, String... values) {
        this.symbol = symbol;
        MMappedSymbolTable symbolTable = journal.getSymbolTable(symbol);
        this.symbolKeys.clear();
        for (int i = 0; i < values.length; i++) {
            int key = symbolTable.getQuick(values[i]);
            if (key != SymbolTable.VALUE_NOT_FOUND) {
                symbolKeys.add(key);
            }
        }
    }

    private void setInterval(Interval interval) {
        this.interval = interval;
    }
}