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

import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.dsl.ImportStatic;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.interop.InteropException;
import com.oracle.truffle.api.interop.InteropLibrary;
import com.oracle.truffle.api.library.CachedLibrary;
import com.oracle.truffle.api.object.DynamicObject;
import com.oracle.truffle.api.profiles.ConditionProfile;
import com.oracle.truffle.js.nodes.JSGuards;
import com.oracle.truffle.js.nodes.JavaScriptBaseNode;
import com.oracle.truffle.js.nodes.access.IsPrimitiveNode;
import com.oracle.truffle.js.nodes.access.PropertyNode;
import com.oracle.truffle.js.nodes.cast.JSToPrimitiveNode.Hint;
import com.oracle.truffle.js.nodes.function.JSFunctionCallNode;
import com.oracle.truffle.js.nodes.interop.ForeignObjectPrototypeNode;
import com.oracle.truffle.js.nodes.unary.IsCallableNode;
import com.oracle.truffle.js.runtime.Errors;
import com.oracle.truffle.js.runtime.JSArguments;
import com.oracle.truffle.js.runtime.JSConfig;
import com.oracle.truffle.js.runtime.JSContext;
import com.oracle.truffle.js.runtime.JSRuntime;

Implements OrdinaryToPrimitive (O, hint).
/**
 * Implements OrdinaryToPrimitive (O, hint).
 */
@ImportStatic({JSConfig.class})
public abstract class OrdinaryToPrimitiveNode extends JavaScriptBaseNode {
    private final Hint hint;
    private final JSContext context;
    private final ConditionProfile toStringFunctionProfile = ConditionProfile.createBinaryProfile();
    private final ConditionProfile valueOfFunctionProfile = ConditionProfile.createBinaryProfile();
    @Child private PropertyNode getToStringNode;
    @Child private PropertyNode getValueOfNode;
    @Child private IsCallableNode isCallableNode;
    @Child private JSFunctionCallNode callToStringNode;
    @Child private JSFunctionCallNode callValueOfNode;
    @Child private IsPrimitiveNode isPrimitiveNode;
    @Child private ForeignObjectPrototypeNode foreignObjectPrototypeNode;

    protected OrdinaryToPrimitiveNode(JSContext context, Hint hint) {
        assert hint == Hint.String || hint == Hint.Number;
        this.hint = hint;
        this.context = context;
        this.isCallableNode = IsCallableNode.create();
        this.isPrimitiveNode = IsPrimitiveNode.create();
    }

    public abstract Object execute(Object object);

    @Specialization(guards = {"isJSObject(object)"})
    protected Object doObject(DynamicObject object) {
        if (hint == Hint.String) {
            return doHintString(object);
        } else {
            assert hint == Hint.Number;
            return doHintNumber(object);
        }
    }

    @Specialization(guards = {"isForeignObject(object)"}, limit = "InteropLibraryLimit")
    protected Object doForeign(Object object,
                    @CachedLibrary("object") InteropLibrary interop) {
        if (hint == Hint.String) {
            return doForeignHintString(object, interop);
        } else {
            assert hint == Hint.Number;
            return doForeignHintNumber(object, interop);
        }
    }

    public static OrdinaryToPrimitiveNode createHintString(JSContext context) {
        return create(context, Hint.String);
    }

    public static OrdinaryToPrimitiveNode createHintNumber(JSContext context) {
        return create(context, Hint.Number);
    }

    public static OrdinaryToPrimitiveNode create(JSContext context, Hint hint) {
        return OrdinaryToPrimitiveNodeGen.create(context, hint);
    }

    protected Object doHintString(DynamicObject object) {
        Object toString = getToString().executeWithTarget(object);
        if (toStringFunctionProfile.profile(isCallableNode.executeBoolean(toString))) {
            Object result = callToStringNode.executeCall(JSArguments.createZeroArg(object, toString));
            if (isPrimitiveNode.executeBoolean(result)) {
                return result;
            }
        }

        Object valueOf = getValueOf().executeWithTarget(object);
        if (valueOfFunctionProfile.profile(isCallableNode.executeBoolean(valueOf))) {
            Object result = callValueOfNode.executeCall(JSArguments.createZeroArg(object, valueOf));
            if (isPrimitiveNode.executeBoolean(result)) {
                return result;
            }
        }

        throw Errors.createTypeErrorCannotConvertToPrimitiveValue(this);
    }

    protected Object doHintNumber(DynamicObject object) {
        assert JSGuards.isJSObject(object);
        Object valueOf = getValueOf().executeWithTarget(object);
        if (valueOfFunctionProfile.profile(isCallableNode.executeBoolean(valueOf))) {
            Object result = callValueOfNode.executeCall(JSArguments.createZeroArg(object, valueOf));
            if (isPrimitiveNode.executeBoolean(result)) {
                return result;
            }
        }

        Object toString = getToString().executeWithTarget(object);
        if (toStringFunctionProfile.profile(isCallableNode.executeBoolean(toString))) {
            Object result = callToStringNode.executeCall(JSArguments.createZeroArg(object, toString));
            if (isPrimitiveNode.executeBoolean(result)) {
                return result;
            }
        }

        throw Errors.createTypeErrorCannotConvertToPrimitiveValue(this);
    }

    protected Object doForeignHintString(Object object, InteropLibrary interop) {
        if (interop.hasMembers(object) && interop.isMemberInvocable(object, JSRuntime.TO_STRING)) {
            Object result;
            try {
                result = JSRuntime.importValue(interop.invokeMember(object, JSRuntime.TO_STRING));
            } catch (InteropException e) {
                result = null;
            }
            if (result != null && isPrimitiveNode.executeBoolean(result)) {
                return result;
            }
        }
        DynamicObject proto = getForeignObjectPrototype(object);
        Object func = getToString().executeWithTarget(proto);
        if (toStringFunctionProfile.profile(isCallableNode.executeBoolean(func))) {
            Object result = callToStringNode.executeCall(JSArguments.createZeroArg(object, func));
            if (isPrimitiveNode.executeBoolean(result)) {
                return result;
            }
        }

        if (interop.hasMembers(object) && interop.isMemberInvocable(object, JSRuntime.VALUE_OF)) {
            Object result;
            try {
                result = JSRuntime.importValue(interop.invokeMember(object, JSRuntime.VALUE_OF));
            } catch (InteropException e) {
                result = null;
            }
            if (result != null && isPrimitiveNode.executeBoolean(result)) {
                return result;
            }
        }
        func = getValueOf().executeWithTarget(proto);
        if (valueOfFunctionProfile.profile(isCallableNode.executeBoolean(func))) {
            Object result = callValueOfNode.executeCall(JSArguments.createZeroArg(object, func));
            if (isPrimitiveNode.executeBoolean(result)) {
                return result;
            }
        }

        throw Errors.createTypeErrorCannotConvertToPrimitiveValue(this);
    }

    protected Object doForeignHintNumber(Object object, InteropLibrary interop) {
        if (interop.hasMembers(object) && interop.isMemberInvocable(object, JSRuntime.VALUE_OF)) {
            Object result;
            try {
                result = JSRuntime.importValue(interop.invokeMember(object, JSRuntime.VALUE_OF));
            } catch (InteropException e) {
                result = null;
            }
            if (result != null && isPrimitiveNode.executeBoolean(result)) {
                return result;
            }
        }
        DynamicObject proto = getForeignObjectPrototype(object);
        Object func = getValueOf().executeWithTarget(proto);
        if (valueOfFunctionProfile.profile(isCallableNode.executeBoolean(func))) {
            Object result = callValueOfNode.executeCall(JSArguments.createZeroArg(object, func));
            if (isPrimitiveNode.executeBoolean(result)) {
                return result;
            }
        }

        if (interop.hasMembers(object) && interop.isMemberInvocable(object, JSRuntime.TO_STRING)) {
            Object result;
            try {
                result = JSRuntime.importValue(interop.invokeMember(object, JSRuntime.TO_STRING));
            } catch (InteropException e) {
                result = null;
            }
            if (result != null && isPrimitiveNode.executeBoolean(result)) {
                return result;
            }
        }
        func = getToString().executeWithTarget(proto);
        if (toStringFunctionProfile.profile(isCallableNode.executeBoolean(func))) {
            Object result = callToStringNode.executeCall(JSArguments.createZeroArg(object, func));
            if (isPrimitiveNode.executeBoolean(result)) {
                return result;
            }
        }

        throw Errors.createTypeErrorCannotConvertToPrimitiveValue(this);
    }

    private PropertyNode getToString() {
        if (getToStringNode == null || callToStringNode == null) {
            CompilerDirectives.transferToInterpreterAndInvalidate();
            getToStringNode = insert(PropertyNode.createMethod(context, null, JSRuntime.TO_STRING));
            callToStringNode = insert(JSFunctionCallNode.createCall());
        }
        return getToStringNode;
    }

    private PropertyNode getValueOf() {
        if (getValueOfNode == null || callValueOfNode == null) {
            CompilerDirectives.transferToInterpreterAndInvalidate();
            getValueOfNode = insert(PropertyNode.createMethod(context, null, JSRuntime.VALUE_OF));
            callValueOfNode = insert(JSFunctionCallNode.createCall());
        }
        return getValueOfNode;
    }

    private DynamicObject getForeignObjectPrototype(Object truffleObject) {
        assert JSRuntime.isForeignObject(truffleObject);
        if (foreignObjectPrototypeNode == null) {
            CompilerDirectives.transferToInterpreterAndInvalidate();
            foreignObjectPrototypeNode = insert(ForeignObjectPrototypeNode.create());
        }
        return foreignObjectPrototypeNode.executeDynamicObject(truffleObject);
    }
}