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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 static org.junit.Assert.fail;

import org.graalvm.polyglot.Context;
import org.graalvm.polyglot.PolyglotAccess;
import org.graalvm.polyglot.PolyglotException;
import org.graalvm.polyglot.Source;
import org.graalvm.polyglot.Value;
import org.graalvm.polyglot.proxy.ProxyExecutable;
import org.junit.Test;

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

Tests for the Polyglot builtin.
/**
 * Tests for the Polyglot builtin.
 */
public class PolyglotBuiltinTest extends JSTest {

    private static String test(String sourceCode) {
        return test(sourceCode, null, true, null);
    }

    private static String test(String sourceCode, String failedMessage) {
        return test(sourceCode, failedMessage, true, null);
    }

    private static String test(String sourceCode, String failedMessage, boolean allowAllAccess, Object arg) {
        return test(sourceCode, failedMessage, allowAllAccess, arg, false);
    }

    private static String test(String sourceCode, String failedMessage, boolean allowAllAccess, Object arg, boolean nashornCompat) {
        try (Context context = JSTest.newContextBuilder().allowAllAccess(allowAllAccess).option(JSContextOptions.DEBUG_BUILTIN_NAME, "true").option(
                        JSContextOptions.NASHORN_COMPATIBILITY_MODE_NAME,
                        String.valueOf(nashornCompat)).build()) {
            if (arg != null) {
                context.getBindings("js").putMember("arg", arg);
            }
            addTestPolyglotBuiltins(context);
            Value result = context.eval(Source.newBuilder(JavaScriptLanguage.ID, sourceCode, "polyglot-test").buildLiteral());
            assertTrue(failedMessage == null);
            return result.asString();
        } catch (Exception ex) {
            assertTrue(failedMessage != null);
            assertTrue(ex.getMessage().contains(failedMessage));
            return "FAILED_AS_EXPECTED";
        }
    }

    public static void addTestPolyglotBuiltins(Context context) {
        Value polyglotObject = context.getBindings("js").getMember("Polyglot");
        polyglotObject.putMember("createForeignObject", (ProxyExecutable) (args) -> new ForeignTestMap());
        polyglotObject.putMember("createForeignDynamicObject", (ProxyExecutable) (args) -> new ForeignDynamicObject());
    }

    @Test
    public void testEval() {
        assertEquals("42", test("''+Polyglot.eval('js','40+2');"));
        assertEquals("42", test("''+Polyglot.eval('application/javascript','40+2');"));
    }

    @Test
    public void testExportImport() {
        assertEquals("foo", test("Polyglot.export('myName',{a:'foo'}); Polyglot.import('myName').a;"));

        test("Polyglot.export({},{a:'foo'});", "Invalid identifier");
        test("Polyglot.import({});", "Invalid identifier");
    }

    @Test
    public void testIsExecutable() {
        assertEquals("true", test("''+Polyglot.isExecutable(x=>x+1);"));

        assertEquals("false", test("''+Polyglot.isExecutable(1);"));
        assertEquals("false", test("''+Polyglot.isExecutable(true);"));
    }

    @Test
    public void testIsBoxed() {
        assertEquals("true", test("''+Polyglot.isBoxed(Object(42));"));
        assertEquals("false", test("''+Polyglot.isBoxed(x=>x+1);"));
        assertEquals("false", test("''+Polyglot.isBoxed(1);"));
        assertEquals("false", test("''+Polyglot.isBoxed('test');"));
        assertEquals("false", test("''+Polyglot.isBoxed(true);"));
    }

    @Test
    public void testIsNull() {
        assertEquals("false", test("''+Polyglot.isNull(x=>x+1);"));
        assertEquals("false", test("''+Polyglot.isNull(1);"));
        assertEquals("false", test("''+Polyglot.isNull('test');"));
        assertEquals("true", test("''+Polyglot.isNull(null);"));
    }

    @Test
    public void testHasSize() {
        assertEquals("false", test("''+Polyglot.hasSize(x=>x+1);"));
        assertEquals("false", test("''+Polyglot.hasSize(1);"));
        assertEquals("false", test("''+Polyglot.hasSize('test');"));
        assertEquals("true", test("''+Polyglot.hasSize([1,2,3]);"));
    }

    @Test
    public void testRead() {
        assertEquals("42", test("''+Polyglot.read([1,42,3],1);"));
        assertEquals("42", test("''+Polyglot.read({a:42},'a');"));
        assertEquals("null", test("''+Polyglot.read({a:42},{});"));
        test("''+Polyglot.read(false,{});", "non-interop object");
    }

    @Test
    public void testWrite() {
        assertEquals("true", test("var a = [1,2,3]; ''+(Polyglot.write(a,1,42) === 42 && a[1] === 42 && a.length === 3);"));
        assertEquals("true", test("var o = {a:1}; ''+(Polyglot.write(o,'b',42) === 42 && o.b === 42 && o.a === 1);"));
        assertEquals("null", test("''+Polyglot.write({a:42},{}, 42);"));
        test("''+Polyglot.write(false,0, {});", "non-interop object");
    }

    @Test
    public void testRemove() {
        assertEquals("1,3", test("var a = [1,2,3]; ''+(Polyglot.remove(a,1) && a);"));
        assertEquals("true", test("var o = {a:1, b:'foo'}; ''+(Polyglot.remove(o,'a') && o.a === undefined && o.b === 'foo');"));
        test("''+Polyglot.remove(false, 0);", "non-interop object");
    }

    @Test
    public void testUnbox() {
        assertEquals("42", test("''+Polyglot.unbox(Object(42));"));
        assertEquals("42", test("''+Polyglot.unbox(42);"));
        test("''+Polyglot.unbox({a:1});", "non-interop object");
        test("''+Polyglot.remove(false,0);", "non-interop object");
    }

    @Test
    public void testExecute() {
        assertEquals("42", test("''+Polyglot.execute(x=>x+1,41);"));
        test("''+Polyglot.execute({a:1});", "Message not supported");
        test("''+Polyglot.execute(false);", "non-interop object");
    }

    @Test
    public void testConstruct() {
        assertEquals("42", test("''+Polyglot.construct(Array,42).length;"));
        test("''+Polyglot.construct({a:1});", "Message not supported");
        test("''+Polyglot.construct(false);", "non-interop object");
    }

    @Test
    public void testGetSize() {
        assertEquals("42", test("''+Polyglot.getSize(new Array(42));"));
        assertEquals("null", test("''+Polyglot.getSize({a:1});"));
        test("''+Polyglot.getSize(false);", "non-interop object");
    }

    @Test
    public void testEvalFile() {
        test("''+Polyglot.evalFile('js','notfound.js');", "Cannot evaluate file");
        test("''+Polyglot.evalFile('js',{a:1});", "Expected arguments:");
    }

    @Test
    public void testHasKeys() {
        assertEquals("true", test("''+Polyglot.hasKeys([1,2,3]);"));
        assertEquals("true", test("''+Polyglot.hasKeys({a:1});"));
        assertEquals("false", test("''+Polyglot.hasKeys(1);"));
    }

    @Test
    public void testKeys() {
        assertEquals("0", test("''+Polyglot.keys([1,2,3]).length;"));
        assertEquals("1", test("''+Polyglot.keys({a:1}).length;"));
        test("''+Polyglot.keys(1);", "non-interop object");
    }

    @Test
    public void testIsInstantiable() {
        assertEquals("false", test("''+Polyglot.isInstantiable([1,2,3]);"));
        assertEquals("true", test("''+Polyglot.isInstantiable(Array);"));
        assertEquals("false", test("''+Polyglot.isInstantiable(1);"));
    }

    @Test
    public void testCreateForeignObject() {
        assertEquals("[object Object]", test("''+Polyglot.createForeignObject();"));
        assertEquals("[object Object]", test("''+Polyglot.createForeignDynamicObject();"));
    }

    @Test
    public void testToJSValue() {
        assertEquals("true", test("''+Polyglot.toJSValue(true);"));
        assertEquals("1", test("''+Polyglot.toJSValue(1);"));
        assertEquals("[object Object]", test("''+Polyglot.toJSValue({});"));
    }

    @Test
    public void testToPolyglotValue() {
        assertEquals("true", test("''+Polyglot.toPolyglotValue(true);"));
        assertEquals("1", test("''+Polyglot.toPolyglotValue(1);"));
    }

    @Test
    public void testDeniedExportImport() {
        try (Context context = JSTest.newContextBuilder(JavaScriptLanguage.ID, TestLanguage.ID).allowPolyglotAccess(
                        PolyglotAccess.newBuilder().allowEval(JavaScriptLanguage.ID, TestLanguage.ID).build()).option(JSContextOptions.POLYGLOT_BUILTIN_NAME, "true").build()) {
            context.getPolyglotBindings().putMember("fortyTwo", 42);
            try {
                context.eval(Source.create(JavaScriptLanguage.ID, "Polyglot.import('fortyTwo');"));
                fail("should have thrown");
            } catch (PolyglotException ex) {
                assertTrue(ex.isGuestException());
                assertFalse(ex.isInternalError());
            }
            try {
                context.eval(Source.create(JavaScriptLanguage.ID, "Polyglot.export('myName',{a:'foo'});"));
                fail("should have thrown");
            } catch (PolyglotException ex) {
                assertTrue(ex.isGuestException());
                assertFalse(ex.isInternalError());
            }
        }
    }

    @Test
    public void testEvalInternalLanguage() {
        try (Context context = JSTest.newContextBuilder().allowPolyglotAccess(PolyglotAccess.ALL).option(JSContextOptions.POLYGLOT_BUILTIN_NAME, "true").build()) {
            try {
                context.eval(Source.create(JavaScriptLanguage.ID, "Polyglot.eval('regex', 'sth');"));
                fail("should have thrown");
            } catch (PolyglotException ex) {
                assertTrue(ex.isGuestException());
                assertFalse(ex.isInternalError());
            }
        }
    }
}