/*
 * Copyright 2022 VMware, Inc.
 * SPDX-License-Identifier: MIT
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package org.dbsp.sqlCompiler.ir.expression;

import com.fasterxml.jackson.databind.JsonNode;
import org.dbsp.sqlCompiler.compiler.backend.JsonDecoder;
import org.dbsp.sqlCompiler.compiler.frontend.calciteObject.CalciteObject;
import org.dbsp.sqlCompiler.compiler.visitors.VisitDecision;
import org.dbsp.sqlCompiler.compiler.visitors.inner.EquivalenceContext;
import org.dbsp.sqlCompiler.compiler.visitors.inner.InnerVisitor;
import org.dbsp.sqlCompiler.ir.IDBSPInnerNode;
import org.dbsp.sqlCompiler.ir.path.DBSPPath;
import org.dbsp.sqlCompiler.ir.type.DBSPType;
import org.dbsp.util.IIndentStream;
import org.dbsp.util.Linq;

import java.util.List;

/** Method application expression. */
public final class DBSPApplyMethodExpression extends DBSPApplyBaseExpression {
    public final DBSPExpression self;

    public DBSPApplyMethodExpression(CalciteObject node,
            String function, DBSPType returnType,
            DBSPExpression self, DBSPExpression... arguments) {
        super(node, new DBSPPath(function).toExpression(), returnType, arguments);
        this.self = self;
    }

    public DBSPApplyMethodExpression(String function, DBSPType returnType,
                                     DBSPExpression self, DBSPExpression... arguments) {
        this(CalciteObject.EMPTY, function, returnType, self, arguments);
    }

    public DBSPApplyMethodExpression(
            DBSPExpression function, DBSPType returnType,
            DBSPExpression self, DBSPExpression... arguments) {
        super(CalciteObject.EMPTY, function, returnType, arguments);
        this.self = self;
        this.checkArgs(true);
    }

    @Override
    public void accept(InnerVisitor visitor) {
        VisitDecision decision = visitor.preorder(this);
        if (decision.stop()) return;
        visitor.push(this);
        visitor.property("type");
        this.type.accept(visitor);
        visitor.property("self");
        this.self.accept(visitor);
        visitor.property("function");
        this.function.accept(visitor);
        visitor.startArrayProperty("arguments");
        int index = 0;
        for (DBSPExpression arg: this.arguments) {
            visitor.propertyIndex(index++);
            arg.accept(visitor);
        }
        visitor.endArrayProperty("arguments");
        visitor.pop(this);
        visitor.postorder(this);
    }

    @Override
    public boolean sameFields(IDBSPInnerNode other) {
        DBSPApplyMethodExpression o = other.as(DBSPApplyMethodExpression.class);
        if (o == null)
            return false;
        return this.function == o.function &&
                this.self == o.self &&
                Linq.same(this.arguments, o.arguments);
    }

    @Override
    public IIndentStream toString(IIndentStream builder) {
        return builder
                .append("(")
                .append(this.self)
                .append(")")
                .append(".")
                .append(this.function)
                .append("(")
                .join(", ", this.arguments)
                .append(")");
    }

    @Override
    public DBSPExpression deepCopy() {
        return new DBSPApplyMethodExpression(this.function.deepCopy(), this.getType(),
                this.self.deepCopy(), Linq.map(this.arguments, DBSPExpression::deepCopy, DBSPExpression.class));
    }

    public DBSPApplyMethodExpression replaceArguments(DBSPExpression self, DBSPExpression... arguments) {
        return new DBSPApplyMethodExpression(this.function, this.type, self, arguments);
    }

    @Override
    public boolean equivalent(EquivalenceContext context, DBSPExpression other) {
        DBSPApplyMethodExpression otherExpression = other.as(DBSPApplyMethodExpression.class);
        if (otherExpression == null)
            return false;
        return context.equivalent(this.self, otherExpression.self) &&
                context.equivalent(this.function, otherExpression.function) &&
                context.equivalent(this.arguments, otherExpression.arguments);
    }

    @SuppressWarnings("unused")
    public static DBSPApplyMethodExpression fromJson(JsonNode node, JsonDecoder decoder) {
        DBSPType returnType = getJsonType(node, decoder);
        DBSPExpression self = fromJsonInner(node, "self", decoder, DBSPExpression.class);
        DBSPExpression function = fromJsonInner(node, "function", decoder, DBSPExpression.class);
        List<DBSPExpression> arguments = fromJsonInnerList(node, "arguments", decoder, DBSPExpression.class);
        return new DBSPApplyMethodExpression(function, returnType, self, arguments.toArray(new DBSPExpression[0]));
    }
}
