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package org.jruby;

import org.jruby.anno.JRubyMethod;
import org.jruby.anno.JRubyClass;
import org.jruby.exceptions.NoMethodError;
import org.jruby.exceptions.RaiseException;
import org.jruby.runtime.Block;
import org.jruby.runtime.ObjectAllocator;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;

import static org.jruby.api.Define.defineClass;

/**
 * The Java representation of a Ruby NoMethodError.
 *
 * @see NoMethodError
 */
@JRubyClass(name="NoMethodError", parent="NameError")
public class RubyNoMethodError extends RubyNameError {
    private IRubyObject args;

    private static final ObjectAllocator ALLOCATOR = RubyNoMethodError::new;

    static RubyClass define(ThreadContext context, RubyClass NameError) {
        return defineClass(context, "NoMethodError", NameError, ALLOCATOR).
                defineMethods(context, RubyNoMethodError.class);
    }

    protected RubyNoMethodError(Ruby runtime, RubyClass exceptionClass) {
        super(runtime, exceptionClass, exceptionClass.getName(runtime.getCurrentContext()));
        this.args = runtime.getNil();
    }
    
    public RubyNoMethodError(Ruby runtime, RubyClass exceptionClass, String message, String name, IRubyObject args) {
        super(runtime, exceptionClass, message,  name);
        this.args = args;
    }

    @Override
    protected RaiseException constructThrowable(String message) {
        return new NoMethodError(message, this);
    }

    public static RubyException newNoMethodError(IRubyObject recv, IRubyObject message, IRubyObject name, IRubyObject args) {
        var context = recv.getRuntime().getCurrentContext();
        RubyClass klass = (RubyClass)recv;

        RubyException newError = (RubyException) klass.allocate(context);

        newError.callInit(message, name, args, Block.NULL_BLOCK);

        return newError;
    }

    public static RubyException newNoMethodError(IRubyObject recv, IRubyObject message, IRubyObject name, IRubyObject args, boolean privateCall) {
        var context = recv.getRuntime().getCurrentContext();
        RubyClass klass = (RubyClass)recv;

        RubyNoMethodError newError = (RubyNoMethodError) klass.allocate(context);

        newError.callInit(message, name, args, Block.NULL_BLOCK);

        newError.privateCall = privateCall;

        return newError;
    }

    @Override
    public IRubyObject initializeOptions(IRubyObject[] args, RubyHash options, Block block) {
        int argc = args.length;
        if (argc > 3) {
            argc--;
            if (args[argc].isTrue() && !args[argc].isNil()) {
               this.privateCall = true;
            } else {
               this.privateCall = false;
            }
        }

        if (argc > 2) {
            this.args = args[ --argc ];
        } else {
            this.args = getRuntime().getNil();
        }

        super.initializeOptions(args, options, block);
        return this;
    }
    
    @JRubyMethod
    public IRubyObject args() {
        return args;
    }

    @Override
    public void copySpecialInstanceVariables(IRubyObject clone) {
        super.copySpecialInstanceVariables(clone);
        RubyNoMethodError exception = (RubyNoMethodError)clone;
        exception.args = args;
    }
}
