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package com.oracle.truffle.js.test.polyglot;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;

import java.util.Collections;

import org.graalvm.polyglot.Context;
import org.graalvm.polyglot.Source;
import org.graalvm.polyglot.Value;
import org.graalvm.polyglot.proxy.ProxyArray;
import org.graalvm.polyglot.proxy.ProxyObject;
import org.junit.Test;

import com.oracle.truffle.js.lang.JavaScriptLanguage;
import com.oracle.truffle.js.test.JSTest;

public class JavaScriptLanguageTest {

    @Test
    public void testToStringNestingDepth() {
        // this tests that JavaScriptLanguage.toString() does not nest too deeply
        try (Context context = JSTest.newContextBuilder().build()) {
            context.getBindings("js").putMember("array", new ProxyArray() {
                @Override
                public Object get(long index) {
                    return this;
                }

                @Override
                public void set(long index, Value arg1) {
                }

                @Override
                public long getSize() {
                    return 10;
                }
            });
            Source source = Source.newBuilder("js", "''+array; array", "noname").interactive(true).buildLiteral();
            context.eval(source);
        }
    }

    @Test
    public void testToStringForeignNull() {
        try (Context context = JSTest.newContextBuilder().build()) {
            context.getBindings("js").putMember("NULL", ForeignTestMap.newNull());
            Value result = context.eval(JavaScriptLanguage.ID, "[NULL, NULL];");
            assertTrue(result.toString(), result.toString().contains("null,"));
            result = context.eval(JavaScriptLanguage.ID, "String([NULL, NULL]);");
            assertEquals("null,null", result.asString());
        }
    }

    @Test
    public void testToStringForeignArray() {
        try (Context context = JSTest.newContextBuilder().build()) {
            context.getBindings("js").putMember("array", new ProxyArray() {
                @Override
                public Object get(long index) {
                    return index;
                }

                @Override
                public void set(long index, Value value) {
                }

                @Override
                public long getSize() {
                    return 5;
                }
            });
            Value result = context.eval(JavaScriptLanguage.ID, "[array];");
            assertTrue(result.toString(), result.toString().contains("0, 1, 2, 3, 4"));
            result = context.eval(JavaScriptLanguage.ID, "String([array]);");
            assertTrue(result.toString(), result.asString().contains("0,1,2,3,4"));
            result = context.eval(JavaScriptLanguage.ID, "'' + array;");
            assertTrue(result.toString(), result.asString().contains("0,1,2,3,4"));
        }
    }

    @Test
    public void testToStringForeignObject() {
        try (Context context = JSTest.newContextBuilder().build()) {
            context.getBindings("js").putMember("obj", ProxyObject.fromMap(Collections.singletonMap("answer", 42)));
            Value result = context.eval(JavaScriptLanguage.ID, "[obj];");
            assertTrue(result.toString(), result.toString().contains("{answer: 42}"));
            result = context.eval(JavaScriptLanguage.ID, "String([obj]);");
            assertTrue(result.toString(), result.asString().contains("[object Object]"));
            result = context.eval(JavaScriptLanguage.ID, "'' + obj;");
            assertTrue(result.toString(), result.asString().contains("[object Object]"));
        }
    }

    @Test
    public void testToStringNestedArray() {
        try (Context context = JSTest.newContextBuilder().build()) {
            Value result = context.eval(JavaScriptLanguage.ID, "[1,[2,[3,[4,[5]]]]];");
            assertEquals("(2)[1, [2, [3, Array(2)]]]", result.toString());
        }
    }

    @Test
    public void testToPrimitiveHostObject() {
        try (Context context = Context.newBuilder(JavaScriptLanguage.ID).allowAllAccess(true).build()) {
            context.getBindings(JavaScriptLanguage.ID).putMember("obj", new TestHostObject());
            Value res = context.eval(JavaScriptLanguage.ID, "obj + obj");
            assertEquals(84, res.asInt());
        }
    }

    public static final class TestHostObject {
        @SuppressWarnings("static-method")
        public int valueOf() {
            return 42;
        }

        @Override
        public String toString() {
            return "string";
        }
    }

    @Test
    public void testRemoveBindings() {
        try (Context context = JSTest.newContextBuilder().build()) {
            Value bindings = context.getBindings("js");
            assertTrue(bindings.removeMember("eval"));

            assertFalse(bindings.hasMember("foo"));
            context.eval(JavaScriptLanguage.ID, "foo=42;");
            assertTrue(bindings.hasMember("foo"));
            assertTrue(bindings.removeMember("foo"));
            assertFalse(bindings.hasMember("foo"));
        }
    }
}