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package org.babyfish.jimmer.sql.ast.impl;

import org.babyfish.jimmer.sql.ast.Expression;
import org.babyfish.jimmer.sql.ast.impl.render.AbstractSqlBuilder;
import org.jetbrains.annotations.NotNull;

import java.util.List;
import java.util.Objects;

class ConcatExpression
        extends AbstractExpression
        implements StringExpressionImplementor {

    private Expression first;

    private List> others;

    ConcatExpression(Expression first, List> others) {
        this.first = first;
        this.others = others;
    }

    @Override
    public void accept(@NotNull AstVisitor visitor) {
        ((Ast) first).accept(visitor);
        for (Expression other : others) {
            ((Ast) other).accept(visitor);
        }
    }

    @Override
    public void renderTo(@NotNull AbstractSqlBuilder builder) {
        builder.sql("concat(");
        renderChild((Ast) first, builder);
        for (Expression other : others) {
            builder.sql(", ");
            renderChild((Ast) other, builder);
        }
        builder.sql(")");
    }

    @Override
    protected boolean determineHasVirtualPredicate() {
        return hasVirtualPredicate(first) || hasVirtualPredicate(others);
    }

    @Override
    protected Ast onResolveVirtualPredicate(AstContext ctx) {
        this.first = ctx.resolveVirtualPredicate(first);
        this.others = ctx.resolveVirtualPredicates(others);
        return this;
    }

    @Override
    public int precedence() {
        return 0;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        ConcatExpression that = (ConcatExpression) o;
        return first.equals(that.first) && others.equals(that.others);
    }

    @Override
    public int hashCode() {
        return Objects.hash(first, others);
    }
}