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package com.oracle.truffle.js.nodes.promise;

import com.oracle.truffle.api.CallTarget;
import com.oracle.truffle.api.Truffle;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.object.DynamicObject;
import com.oracle.truffle.js.nodes.JavaScriptNode;
import com.oracle.truffle.js.nodes.access.CreateDataPropertyNode;
import com.oracle.truffle.js.nodes.access.CreateObjectNode;
import com.oracle.truffle.js.nodes.access.PropertyGetNode;
import com.oracle.truffle.js.nodes.arguments.AccessIndexedArgumentNode;
import com.oracle.truffle.js.nodes.function.JSFunctionCallNode;
import com.oracle.truffle.js.runtime.JSArguments;
import com.oracle.truffle.js.runtime.JSContext;
import com.oracle.truffle.js.runtime.JSFrameUtil;
import com.oracle.truffle.js.runtime.JavaScriptRootNode;
import com.oracle.truffle.js.runtime.builtins.JSArray;
import com.oracle.truffle.js.runtime.builtins.JSFunction;
import com.oracle.truffle.js.runtime.builtins.JSFunctionData;
import com.oracle.truffle.js.runtime.objects.PromiseCapabilityRecord;
import com.oracle.truffle.js.runtime.objects.Undefined;
import com.oracle.truffle.js.runtime.util.SimpleArrayList;

public class PerformPromiseAllSettledNode extends PerformPromiseAllNode {

    protected PerformPromiseAllSettledNode(JSContext context) {
        super(context);
    }

    public static PerformPromiseAllSettledNode create(JSContext context) {
        return new PerformPromiseAllSettledNode(context);
    }

    @Override
    protected DynamicObject createResolveElementFunction(int index, SimpleArrayList<Object> values, PromiseCapabilityRecord resultCapability, BoxedInt remainingElementsCount) {
        JSFunctionData functionData = context.getOrCreateBuiltinFunctionData(JSContext.BuiltinFunctionKey.PromiseAllSettledResolveElement, (c) -> createResolveElementFunctionImpl(c));
        DynamicObject function = JSFunction.create(context.getRealm(), functionData);
        setArgs.setValue(function, new ResolveElementArgs(index, values, resultCapability, remainingElementsCount));
        return function;
    }

    @Override
    protected Object createRejectElementFunction(int index, SimpleArrayList<Object> values, PromiseCapabilityRecord resultCapability, BoxedInt remainingElementsCount) {
        JSFunctionData functionData = context.getOrCreateBuiltinFunctionData(JSContext.BuiltinFunctionKey.PromiseAllSettledRejectElement, (c) -> createRejectElementFunctionImpl(c));
        DynamicObject function = JSFunction.create(context.getRealm(), functionData);
        setArgs.setValue(function, new ResolveElementArgs(index, values, resultCapability, remainingElementsCount));
        return function;
    }

    private static JSFunctionData createResolveElementFunctionImpl(JSContext context) {
        class PromiseAllSEttledResolveElementRootNode extends JavaScriptRootNode {
            @Child private JavaScriptNode valueNode = AccessIndexedArgumentNode.create(0);
            @Child private PropertyGetNode getArgs = PropertyGetNode.createGetHidden(RESOLVE_ELEMENT_ARGS_KEY, context);
            @Child private JSFunctionCallNode callResolve = JSFunctionCallNode.createCall();
            @Child private CreateObjectNode objectCreateNode = CreateObjectNode.create(context);
            @Child private CreateDataPropertyNode createStatusPropertyNode = CreateDataPropertyNode.create(context, "status");
            @Child private CreateDataPropertyNode createValuePropertyNode = CreateDataPropertyNode.create(context, "value");

            @Override
            public Object execute(VirtualFrame frame) {
                DynamicObject functionObject = JSFrameUtil.getFunctionObject(frame);
                ResolveElementArgs args = (ResolveElementArgs) getArgs.getValue(functionObject);
                if (args.alreadyCalled) {
                    return Undefined.instance;
                }
                args.alreadyCalled = true;
                Object value = valueNode.execute(frame);

                DynamicObject obj = objectCreateNode.execute(frame);
                createStatusPropertyNode.executeVoid(obj, "fulfilled");
                createValuePropertyNode.executeVoid(obj, value);

                args.values.set(args.index, obj);
                args.remainingElements.value--;
                if (args.remainingElements.value == 0) {
                    DynamicObject valuesArray = JSArray.createConstantObjectArray(context, args.values.toArray());
                    return callResolve.executeCall(JSArguments.createOneArg(Undefined.instance, args.capability.getResolve(), valuesArray));
                }
                return Undefined.instance;
            }
        }
        CallTarget callTarget = Truffle.getRuntime().createCallTarget(new PromiseAllSEttledResolveElementRootNode());
        return JSFunctionData.createCallOnly(context, callTarget, 1, "");
    }

    private static JSFunctionData createRejectElementFunctionImpl(JSContext context) {
        class PromiseAllSettledRejectElementRootNode extends JavaScriptRootNode {
            @Child private JavaScriptNode valueNode = AccessIndexedArgumentNode.create(0);
            @Child private PropertyGetNode getArgs = PropertyGetNode.createGetHidden(RESOLVE_ELEMENT_ARGS_KEY, context);
            @Child private JSFunctionCallNode callResolve = JSFunctionCallNode.createCall();
            @Child private CreateObjectNode objectCreateNode = CreateObjectNode.create(context);
            @Child private CreateDataPropertyNode createStatusPropertyNode = CreateDataPropertyNode.create(context, "status");
            @Child private CreateDataPropertyNode createReasonPropertyNode = CreateDataPropertyNode.create(context, "reason");

            @Override
            public Object execute(VirtualFrame frame) {
                DynamicObject functionObject = JSFrameUtil.getFunctionObject(frame);
                ResolveElementArgs args = (ResolveElementArgs) getArgs.getValue(functionObject);
                if (args.alreadyCalled) {
                    return Undefined.instance;
                }
                args.alreadyCalled = true;
                Object value = valueNode.execute(frame);

                DynamicObject obj = objectCreateNode.execute(frame);
                createStatusPropertyNode.executeVoid(obj, "rejected");
                createReasonPropertyNode.executeVoid(obj, value);

                args.values.set(args.index, obj);
                args.remainingElements.value--;
                if (args.remainingElements.value == 0) {
                    DynamicObject valuesArray = JSArray.createConstantObjectArray(context, args.values.toArray());
                    return callResolve.executeCall(JSArguments.createOneArg(Undefined.instance, args.capability.getResolve(), valuesArray));
                }
                return Undefined.instance;
            }
        }
        CallTarget callTarget = Truffle.getRuntime().createCallTarget(new PromiseAllSettledRejectElementRootNode());
        return JSFunctionData.createCallOnly(context, callTarget, 1, "");
    }
}