/*
 * Copyright (C) 2017 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "config.h"

#import "PlatformUtilities.h"
#import "TestNavigationDelegate.h"
#import "TestWKWebView.h"
#import <WebKit/WKFoundation.h>
#import <WebKit/WKPreferencesPrivate.h>
#import <WebKit/WKProcessPoolPrivate.h>
#import <WebKit/WKWebViewConfigurationPrivate.h>
#import <WebKit/WKWebsiteDataRecordPrivate.h>
#import <WebKit/WKWebsiteDataStorePrivate.h>
#import <WebKit/_WKWebsiteDataStoreConfiguration.h>
#import <wtf/RetainPtr.h>

static bool finishedNavigation = false;

@interface DisableITPDuringNavigationDelegate : NSObject <WKNavigationDelegate>
@end

@implementation DisableITPDuringNavigationDelegate

- (void)webView:(WKWebView *)webView didCommitNavigation:(WKNavigation *)navigation
{
    // Disable ITP so that the WebResourceLoadStatisticsStore gets destroyed before its has a chance to receive the notification from the page.
    [[WKWebsiteDataStore defaultDataStore] _setResourceLoadStatisticsEnabled:NO];
}

- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation
{
    finishedNavigation = true;
}

@end

TEST(ResourceLoadStatistics, GrandfatherCallback)
{
    auto *dataStore = [WKWebsiteDataStore defaultDataStore];

    NSURL *statisticsDirectoryURL = [NSURL fileURLWithPath:[@"~/Library/WebKit/TestWebKitAPI/WebsiteData/ResourceLoadStatistics" stringByExpandingTildeInPath] isDirectory:YES];
    NSURL *fileURL = [statisticsDirectoryURL URLByAppendingPathComponent:@"full_browsing_session_resourceLog.plist"];
    [[NSFileManager defaultManager] removeItemAtURL:fileURL error:nil];
    [[NSFileManager defaultManager] removeItemAtURL:statisticsDirectoryURL error:nil];
    EXPECT_FALSE([[NSFileManager defaultManager] fileExistsAtPath:statisticsDirectoryURL.path]);

    static bool doneFlag;
    static bool grandfatheredFlag;

    [dataStore _setResourceLoadStatisticsTestingCallback:^(WKWebsiteDataStore *, NSString *message) {
        ASSERT_TRUE([message isEqualToString:@"Grandfathered"]);
        grandfatheredFlag = true;
    }];

    // We need an active NetworkProcess to perform ResourceLoadStatistics operations.
    auto webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, 800, 600)]);
    [dataStore _setResourceLoadStatisticsEnabled:YES];
    [webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"about:blank"]]];

    TestWebKitAPI::Util::run(&grandfatheredFlag);

    // Spin the runloop until the resource load statistics file has written to disk.
    // If the test enters a spin loop here, it has failed.
    while (true) {
        if ([[NSFileManager defaultManager] fileExistsAtPath:fileURL.path])
            break;
        TestWebKitAPI::Util::spinRunLoop(1);
    }

    grandfatheredFlag = false;
    [dataStore removeDataOfTypes:[WKWebsiteDataStore _allWebsiteDataTypesIncludingPrivate]  modifiedSince:[NSDate distantPast] completionHandler:^ {
        doneFlag = true;
    }];

    TestWebKitAPI::Util::run(&doneFlag);
    TestWebKitAPI::Util::spinRunLoop(10);

    // The website data store remove should have completed, but since we removed all of the data types that are monitored by resource load statistics,
    // no grandfathering call should have been made.
    EXPECT_FALSE(grandfatheredFlag);
    EXPECT_FALSE([[NSFileManager defaultManager] fileExistsAtPath:fileURL.path]);

    doneFlag = false;
    [dataStore removeDataOfTypes:[NSSet setWithObjects:WKWebsiteDataTypeCookies, _WKWebsiteDataTypeResourceLoadStatistics, nil] modifiedSince:[NSDate distantPast] completionHandler:^ {
        doneFlag = true;
    }];

    // Since we did not remove every data type covered by resource load statistics, we do expect that grandfathering took place again.
    // If the test hangs waiting on either of these conditions, it has failed.
    TestWebKitAPI::Util::run(&grandfatheredFlag);
    TestWebKitAPI::Util::run(&doneFlag);

    // Spin the runloop until the resource load statistics file has written to disk.
    // If the test enters a spin loop here, it has failed.
    while (true) {
        if ([[NSFileManager defaultManager] fileExistsAtPath:fileURL.path])
            break;
        TestWebKitAPI::Util::spinRunLoop(1);
    }
}

TEST(ResourceLoadStatistics, ShouldNotGrandfatherOnStartup)
{
    auto *dataStore = [WKWebsiteDataStore defaultDataStore];

    NSURL *statisticsDirectoryURL = [NSURL fileURLWithPath:[@"~/Library/WebKit/TestWebKitAPI/WebsiteData/ResourceLoadStatistics" stringByExpandingTildeInPath] isDirectory:YES];
    NSURL *targetURL = [statisticsDirectoryURL URLByAppendingPathComponent:@"full_browsing_session_resourceLog.plist"];
    NSURL *testResourceURL = [[NSBundle mainBundle] URLForResource:@"EmptyGrandfatheredResourceLoadStatistics" withExtension:@"plist" subdirectory:@"TestWebKitAPI.resources"];

    [[NSFileManager defaultManager] createDirectoryAtURL:statisticsDirectoryURL withIntermediateDirectories:YES attributes:nil error:nil];
    [[NSFileManager defaultManager] copyItemAtURL:testResourceURL toURL:targetURL error:nil];

    EXPECT_TRUE([[NSFileManager defaultManager] fileExistsAtPath:targetURL.path]);

    static bool callbackFlag;
    [dataStore _setResourceLoadStatisticsTestingCallback:^(WKWebsiteDataStore *, NSString *message) {
        ASSERT_TRUE([message isEqualToString:@"PopulatedWithoutGrandfathering"]);
        callbackFlag = true;
    }];

    // We need an active NetworkProcess to perform ResourceLoadStatistics operations.
    auto webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, 800, 600)]);
    [dataStore _setResourceLoadStatisticsEnabled:YES];
    [webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"about:blank"]]];

    TestWebKitAPI::Util::run(&callbackFlag);
}

TEST(ResourceLoadStatistics, ChildProcessesNotLaunched)
{
    // Ensure the shared process pool exists so the data store operations we're about to do work with it.
    WKProcessPool *sharedProcessPool = [WKProcessPool _sharedProcessPool];

    EXPECT_EQ((size_t)0, [sharedProcessPool _pluginProcessCount]);

    auto *dataStore = [WKWebsiteDataStore defaultDataStore];

    NSURL *statisticsDirectoryURL = [NSURL fileURLWithPath:[@"~/Library/WebKit/TestWebKitAPI/WebsiteData/ResourceLoadStatistics" stringByExpandingTildeInPath] isDirectory:YES];
    NSURL *targetURL = [statisticsDirectoryURL URLByAppendingPathComponent:@"full_browsing_session_resourceLog.plist"];
    NSURL *testResourceURL = [[NSBundle mainBundle] URLForResource:@"EmptyGrandfatheredResourceLoadStatistics" withExtension:@"plist" subdirectory:@"TestWebKitAPI.resources"];

    [[NSFileManager defaultManager] createDirectoryAtURL:statisticsDirectoryURL withIntermediateDirectories:YES attributes:nil error:nil];
    [[NSFileManager defaultManager] copyItemAtURL:testResourceURL toURL:targetURL error:nil];

    EXPECT_TRUE([[NSFileManager defaultManager] fileExistsAtPath:targetURL.path]);

    static bool doneFlag;
    [dataStore _setResourceLoadStatisticsTestingCallback:^(WKWebsiteDataStore *, NSString *message) {
        EXPECT_TRUE([message isEqualToString:@"PopulatedWithoutGrandfathering"]);
        doneFlag = true;
    }];

    // We need an active NetworkProcess to perform ResourceLoadStatistics operations.
    auto webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, 800, 600)]);
    [dataStore _setResourceLoadStatisticsEnabled:YES];
    [webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"about:blank"]]];

    TestWebKitAPI::Util::run(&doneFlag);

    EXPECT_TRUE([[NSFileManager defaultManager] fileExistsAtPath:targetURL.path]);

    webView.clear();

    EXPECT_EQ((size_t)0, [sharedProcessPool _pluginProcessCount]);
}

TEST(ResourceLoadStatistics, IPCAfterStoreDestruction)
{
    [[WKWebsiteDataStore defaultDataStore] _setResourceLoadStatisticsEnabled:YES];

    auto configuration = adoptNS([[WKWebViewConfiguration alloc] init]);

    // Test page requires window.internals.
#if WK_HAVE_C_SPI
    WKRetainPtr<WKContextRef> context = adoptWK(TestWebKitAPI::Util::createContextForInjectedBundleTest("InternalsInjectedBundleTest"));
    configuration.get().processPool = (WKProcessPool *)context.get();
#endif

    auto webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, 800, 600) configuration:configuration.get()]);

    auto navigationDelegate = adoptNS([[DisableITPDuringNavigationDelegate alloc] init]);
    [webView setNavigationDelegate:navigationDelegate.get()];

    [webView loadRequest:[NSURLRequest requestWithURL:[[NSBundle mainBundle] URLForResource:@"notify-resourceLoadObserver" withExtension:@"html" subdirectory:@"TestWebKitAPI.resources"]]];

    TestWebKitAPI::Util::run(&finishedNavigation);
}

static void cleanupITPDatabase(WKWebsiteDataStore *dataStore)
{
    [dataStore _setResourceLoadStatisticsEnabled:YES];

    // Make sure 'evil.com' is not in our data set.
    static bool doneFlag;
    static bool dataSyncCompleted;
    [dataStore _setResourceLoadStatisticsTestingCallback:^(WKWebsiteDataStore *, NSString *message) {
        if (![message isEqualToString:@"Storage Synced"])
            return;

        dataSyncCompleted = true;
    }];
    [dataStore _clearPrevalentDomain:[NSURL URLWithString:@"http://evil.com"] completionHandler: ^(void) {
        doneFlag = true;
    }];

    TestWebKitAPI::Util::run(&doneFlag);

    // Trigger ITP to process its data to force a sync to persistent storage.
    [dataStore _processStatisticsAndDataRecords: ^(void) {
        doneFlag = true;
    }];
    
    TestWebKitAPI::Util::run(&doneFlag);
    TestWebKitAPI::Util::run(&dataSyncCompleted);
    
    TestWebKitAPI::Util::spinRunLoop(1);

    [dataStore _setResourceLoadStatisticsEnabled:NO];
}

TEST(ResourceLoadStatistics, EnableDisableITP)
{
    // Ensure the shared process pool exists so the data store operations we're about to do work with it.
    auto *sharedProcessPool = [WKProcessPool _sharedProcessPool];
    auto *dataStore = [WKWebsiteDataStore defaultDataStore];

    auto configuration = adoptNS([[WKWebViewConfiguration alloc] init]);
    [configuration setProcessPool: sharedProcessPool];
    configuration.get().websiteDataStore = dataStore;

    auto webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, 800, 600) configuration:configuration.get()]);
    
    [webView loadHTMLString:@"WebKit Test" baseURL:[NSURL URLWithString:@"http://webkit.org"]];
    [webView _test_waitForDidFinishNavigation];

    cleanupITPDatabase(dataStore);

    // ITP should be off, no URLs are prevalent.
    static bool doneFlag;
    [dataStore _getIsPrevalentDomain:[NSURL URLWithString:@"http://evil.com"] completionHandler: ^(BOOL prevalent) {
        EXPECT_FALSE(prevalent);
        doneFlag = true;
    }];

    TestWebKitAPI::Util::run(&doneFlag);

    // Turn it on
    [dataStore _setResourceLoadStatisticsEnabled:YES];

    [webView loadHTMLString:@"WebKit Test" baseURL:[NSURL URLWithString:@"http://webkit.org"]];
    [webView _test_waitForDidFinishNavigation];
    
    // ITP should be on, but nothing was registered as prevalent yet.
    doneFlag = false;
    [dataStore _getIsPrevalentDomain:[NSURL URLWithString:@"http://evil.com"] completionHandler: ^(BOOL prevalent) {
        EXPECT_FALSE(prevalent);
        doneFlag = true;
    }];

    TestWebKitAPI::Util::run(&doneFlag);

    // Teach ITP about a bad origin:
    doneFlag = false;
    [dataStore _setPrevalentDomain:[NSURL URLWithString:@"http://evil.com"] completionHandler: ^(void) {
        doneFlag = true;
    }];

    TestWebKitAPI::Util::run(&doneFlag);

    [webView loadHTMLString:@"WebKit Test" baseURL:[NSURL URLWithString:@"http://webkit.org"]];
    [webView _test_waitForDidFinishNavigation];

    // ITP should be on, and know about 'evil.com'
    doneFlag = false;
    [dataStore _getIsPrevalentDomain:[NSURL URLWithString:@"http://evil.com"] completionHandler: ^(BOOL prevalent) {
        EXPECT_TRUE(prevalent);
        doneFlag = true;
    }];
    
    TestWebKitAPI::Util::run(&doneFlag);

    // Turn it off
    [dataStore _setResourceLoadStatisticsEnabled:NO];

    [webView loadHTMLString:@"WebKit Test" baseURL:[NSURL URLWithString:@"http://webkit.org"]];
    [webView _test_waitForDidFinishNavigation];

    // ITP should be off, no URLs are prevalent.
    doneFlag = false;
    [dataStore _getIsPrevalentDomain:[NSURL URLWithString:@"http://evil.com"] completionHandler: ^(BOOL prevalent) {
        EXPECT_FALSE(prevalent);
        doneFlag = true;
    }];
    
    TestWebKitAPI::Util::run(&doneFlag);
}

TEST(ResourceLoadStatistics, RemoveSessionID)
{
    auto configuration = adoptNS([[WKWebViewConfiguration alloc] init]);
    auto websiteDataStoreConfiguration = adoptNS([[_WKWebsiteDataStoreConfiguration alloc] init]);
    configuration.get().websiteDataStore = [[[WKWebsiteDataStore alloc] _initWithConfiguration:websiteDataStoreConfiguration.get()] autorelease];

    auto webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, 800, 600) configuration:configuration.get()]);

    // We load a resource so that the NetworkSession stays alive a little bit longer after the session is removed.

    [webView loadHTMLString:@"<a id='link' href='http://webkit.org' download>Click me!</a>" baseURL:[NSURL URLWithString:@"http://webkit.org"]];
    [webView _test_waitForDidFinishNavigation];

    static bool doneFlag = false;
    [webView evaluateJavaScript:@"document.getElementById('link').click();" completionHandler: ^(id, NSError*) {
        doneFlag = true;
    }];
    TestWebKitAPI::Util::run(&doneFlag);

    [configuration.get().websiteDataStore _setResourceLoadStatisticsEnabled:YES];
    [configuration.get().websiteDataStore _setResourceLoadStatisticsDebugMode:YES];

    // Trigger ITP tasks.
    [configuration.get().websiteDataStore _scheduleCookieBlockingUpdate: ^(void) { }];
    // Trigger removing of the sessionID.
    TestWebKitAPI::Util::spinRunLoop(2);
    [webView _close];
    webView = nullptr;
    configuration = nullptr;

    auto webView2 = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, 800, 600)]);
    [webView2 loadHTMLString:@"WebKit Test" baseURL:[NSURL URLWithString:@"http://webkit.org"]];
    [webView2 _test_waitForDidFinishNavigation];
}

TEST(ResourceLoadStatistics, NetworkProcessRestart)
{
    // Ensure the shared process pool exists so the data store operations we're about to do work with it.
    auto *sharedProcessPool = [WKProcessPool _sharedProcessPool];
    auto *dataStore = [WKWebsiteDataStore defaultDataStore];

    auto configuration = adoptNS([[WKWebViewConfiguration alloc] init]);
    [configuration setProcessPool: sharedProcessPool];
    configuration.get().websiteDataStore = dataStore;

    auto webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, 800, 600) configuration:configuration.get()]);

    [webView loadHTMLString:@"WebKit Test" baseURL:[NSURL URLWithString:@"http://webkit.org"]];
    [webView _test_waitForDidFinishNavigation];

    cleanupITPDatabase(dataStore);

    // Turn it on
    [dataStore _setResourceLoadStatisticsEnabled:YES];

    [webView loadHTMLString:@"WebKit Test" baseURL:[NSURL URLWithString:@"http://webkit.org"]];
    [webView _test_waitForDidFinishNavigation];

    // ITP should be on, but nothing was registered as prevalent yet.
    static bool doneFlag;
    [dataStore _getIsPrevalentDomain:[NSURL URLWithString:@"http://evil.com"] completionHandler: ^(BOOL prevalent) {
        EXPECT_FALSE(prevalent);
        doneFlag = true;
    }];

    TestWebKitAPI::Util::run(&doneFlag);

    // Teach ITP about a bad origin:
    doneFlag = false;
    [dataStore _setPrevalentDomain:[NSURL URLWithString:@"http://evil.com"] completionHandler: ^(void) {
        doneFlag = true;
    }];

    TestWebKitAPI::Util::run(&doneFlag);

    [webView loadHTMLString:@"WebKit Test" baseURL:[NSURL URLWithString:@"http://webkit.org"]];
    [webView _test_waitForDidFinishNavigation];

    // ITP should be on, and know about 'evil.com'
    doneFlag = false;
    [dataStore _getIsPrevalentDomain:[NSURL URLWithString:@"http://evil.com"] completionHandler: ^(BOOL prevalent) {
        EXPECT_TRUE(prevalent);
        doneFlag = true;
    }];

    TestWebKitAPI::Util::run(&doneFlag);

    static bool dataSyncCompleted;
    [dataStore _setResourceLoadStatisticsTestingCallback:^(WKWebsiteDataStore *, NSString *message) {
        if (![message isEqualToString:@"Storage Synced"])
            return;
        dataSyncCompleted = true;
    }];

    // Tell ITP to process data so it will sync the new 'bad guy' to persistent storage:
    [dataStore _processStatisticsAndDataRecords: ^(void) {
        doneFlag = true;
     }];

    TestWebKitAPI::Util::run(&doneFlag);
    TestWebKitAPI::Util::run(&dataSyncCompleted);

    TestWebKitAPI::Util::spinRunLoop(1);

    [configuration.get().processPool _terminateNetworkProcess];

    auto webView2 = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, 800, 600) configuration:configuration.get()]);

    [webView2 loadHTMLString:@"WebKit Test 2" baseURL:[NSURL URLWithString:@"http://webkit.org"]];
    [webView2 _test_waitForDidFinishNavigation];

    // ITP should be on, and know about 'evil.com'
    doneFlag = false;
    [dataStore _getIsPrevalentDomain:[NSURL URLWithString:@"http://evil.com"] completionHandler: ^(BOOL prevalent) {
        EXPECT_TRUE(prevalent);
        doneFlag = true;
    }];

    TestWebKitAPI::Util::run(&doneFlag);

    // Turn it off
    [dataStore _setResourceLoadStatisticsEnabled:NO];

    [webView loadHTMLString:@"WebKit Test" baseURL:[NSURL URLWithString:@"http://webkit.org"]];
    [webView _test_waitForDidFinishNavigation];

    // ITP should be off, no URLs are prevalent.
    doneFlag = false;
    [dataStore _getIsPrevalentDomain:[NSURL URLWithString:@"http://evil.com"] completionHandler: ^(BOOL prevalent) {
        EXPECT_FALSE(prevalent);
        doneFlag = true;
    }];

    TestWebKitAPI::Util::run(&doneFlag);

    TestWebKitAPI::Util::spinRunLoop(1);

    [configuration.get().processPool _terminateNetworkProcess];

    auto webView3 = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, 800, 600) configuration:configuration.get()]);

    [webView3 loadHTMLString:@"WebKit Test 3" baseURL:[NSURL URLWithString:@"http://webkit.org"]];
    [webView3 _test_waitForDidFinishNavigation];

    TestWebKitAPI::Util::run(&doneFlag);

    // ITP should still be off, and should not know about 'evil.com'
    doneFlag = false;
    [dataStore _getIsPrevalentDomain:[NSURL URLWithString:@"http://evil.com"] completionHandler: ^(BOOL prevalent) {
        EXPECT_FALSE(prevalent);
        doneFlag = true;
    }];

    TestWebKitAPI::Util::run(&doneFlag);
}

TEST(ResourceLoadStatistics, NoMessagesWhenNotTesting)
{
    auto configuration = adoptNS([[WKWebViewConfiguration alloc] init]);
    WKWebsiteDataStore *dataStore = [[[WKWebsiteDataStore alloc] _initWithConfiguration:[[[_WKWebsiteDataStoreConfiguration alloc] init] autorelease]] autorelease];
    [configuration setWebsiteDataStore:dataStore];
    [dataStore _setResourceLoadStatisticsEnabled:YES];
    auto webView = adoptNS([[TestWKWebView alloc] initWithFrame:NSMakeRect(0, 0, 100, 100) configuration:configuration.get()]);
    [webView synchronouslyLoadTestPageNamed:@"simple"];
    EXPECT_FALSE([WKWebsiteDataStore _defaultDataStoreExists]);
}