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/*
* SPDX-FileCopyrightText: 2023 The Refinery Authors <https://refinery.tools/>
*
* SPDX-License-Identifier: EPL-2.0
*/
package tools.refinery.store.reasoning.translator.multiobject;
import org.jetbrains.annotations.NotNull;
import tools.refinery.store.model.Model;
import tools.refinery.store.reasoning.ReasoningAdapter;
import tools.refinery.store.reasoning.refinement.PartialModelInitializer;
import tools.refinery.store.reasoning.seed.ModelSeed;
import tools.refinery.store.reasoning.translator.TranslationException;
import tools.refinery.store.representation.Symbol;
import tools.refinery.logic.term.truthvalue.TruthValue;
import tools.refinery.logic.term.cardinalityinterval.CardinalityInterval;
import tools.refinery.logic.term.cardinalityinterval.CardinalityIntervals;
import tools.refinery.store.tuple.Tuple;
import java.util.Arrays;
import java.util.HashMap;
import java.util.function.Function;
class MultiObjectInitializer implements PartialModelInitializer {
private final Symbol<CardinalityInterval> countSymbol;
public MultiObjectInitializer(Symbol<CardinalityInterval> countSymbol) {
this.countSymbol = countSymbol;
}
@Override
public void initialize(Model model, ModelSeed modelSeed) {
var intervals = initializeIntervals(model, modelSeed);
initializeExists(intervals, model, modelSeed);
initializeEquals(intervals, model, modelSeed);
var countInterpretation = model.getInterpretation(countSymbol);
var uniqueTable = new HashMap<CardinalityInterval, CardinalityInterval>();
for (int i = 0; i < intervals.length; i++) {
var interval = intervals[i];
if (interval.isError()) {
throw new TranslationException(ReasoningAdapter.EXISTS_SYMBOL,
"Inconsistent existence or equality for node " + i);
}
var uniqueInterval = uniqueTable.computeIfAbsent(intervals[i], Function.identity());
countInterpretation.put(Tuple.of(i), uniqueInterval);
}
}
@NotNull
private CardinalityInterval[] initializeIntervals(Model model, ModelSeed modelSeed) {
var intervals = new CardinalityInterval[modelSeed.getNodeCount()];
if (modelSeed.containsSeed(MultiObjectTranslator.COUNT_SYMBOL)) {
Arrays.fill(intervals, CardinalityIntervals.ONE);
var cursor = modelSeed.getCursor(MultiObjectTranslator.COUNT_SYMBOL, CardinalityIntervals.ONE);
while (cursor.move()) {
model.checkCancelled();
int i = cursor.getKey().get(0);
checkNodeId(intervals, i);
intervals[i] = cursor.getValue();
}
} else {
Arrays.fill(intervals, CardinalityIntervals.SET);
if (!modelSeed.containsSeed(ReasoningAdapter.EXISTS_SYMBOL) ||
!modelSeed.containsSeed(ReasoningAdapter.EQUALS_SYMBOL)) {
throw new TranslationException(MultiObjectTranslator.COUNT_SYMBOL,
"Seed for %s and %s is required if there is no seed for %s".formatted(
ReasoningAdapter.EXISTS_SYMBOL, ReasoningAdapter.EQUALS_SYMBOL,
MultiObjectTranslator.COUNT_SYMBOL));
}
}
return intervals;
}
private void initializeExists(CardinalityInterval[] intervals, Model model, ModelSeed modelSeed) {
if (!modelSeed.containsSeed(ReasoningAdapter.EXISTS_SYMBOL)) {
return;
}
var cursor = modelSeed.getCursor(ReasoningAdapter.EXISTS_SYMBOL, TruthValue.UNKNOWN);
while (cursor.move()) {
model.checkCancelled();
int i = cursor.getKey().get(0);
checkNodeId(intervals, i);
switch (cursor.getValue()) {
case TRUE -> intervals[i] = intervals[i].meet(CardinalityIntervals.SOME);
case FALSE -> intervals[i] = intervals[i].meet(CardinalityIntervals.NONE);
case ERROR -> throw new TranslationException(ReasoningAdapter.EXISTS_SYMBOL,
"Inconsistent existence for node " + i);
default -> throw new TranslationException(ReasoningAdapter.EXISTS_SYMBOL,
"Invalid existence truth value %s for node %d".formatted(cursor.getValue(), i));
}
}
}
private void initializeEquals(CardinalityInterval[] intervals, Model model, ModelSeed modelSeed) {
if (!modelSeed.containsSeed(ReasoningAdapter.EQUALS_SYMBOL)) {
return;
}
var seed = modelSeed.getSeed(ReasoningAdapter.EQUALS_SYMBOL);
var cursor = seed.getCursor(TruthValue.FALSE, modelSeed.getNodeCount());
while (cursor.move()) {
model.checkCancelled();
var key = cursor.getKey();
int i = key.get(0);
int otherIndex = key.get(1);
if (i != otherIndex) {
throw new TranslationException(ReasoningAdapter.EQUALS_SYMBOL,
"Off-diagonal equivalence (%d, %d) is not permitted".formatted(i, otherIndex));
}
checkNodeId(intervals, i);
switch (cursor.getValue()) {
case TRUE -> intervals[i] = intervals[i].meet(CardinalityIntervals.LONE);
case UNKNOWN -> {
// Nothing do to, {@code intervals} is initialized with unknown equality.
}
case ERROR -> throw new TranslationException(ReasoningAdapter.EQUALS_SYMBOL,
"Inconsistent equality for node " + i);
default -> throw new TranslationException(ReasoningAdapter.EQUALS_SYMBOL,
"Invalid equality truth value %s for node %d".formatted(cursor.getValue(), i));
}
}
for (int i = 0; i < intervals.length; i++) {
model.checkCancelled();
if (seed.get(Tuple.of(i, i)) == TruthValue.FALSE) {
throw new TranslationException(ReasoningAdapter.EQUALS_SYMBOL, "Inconsistent equality for node " + i);
}
}
}
private void checkNodeId(CardinalityInterval[] intervals, int nodeId) {
if (nodeId < 0 || nodeId >= intervals.length) {
throw new IllegalArgumentException("Expected node id %d to be lower than model size %d"
.formatted(nodeId, intervals.length));
}
}
}
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