/*
 * Copyright (C) 2019 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.
 */

#import "config.h"

#import "PlatformUtilities.h"
#import "Test.h"
#import "TestWKWebView.h"
#import <WebKit/WKNavigationActionPrivate.h>
#import <wtf/RetainPtr.h>

@interface NavigationActionTestDelegate : NSObject <WKNavigationDelegate>

@property (nonatomic, readonly) WKNavigationAction *navigationAction;
@property (nonatomic) WKNavigationActionPolicy navigationPolicy;

@end

@implementation NavigationActionTestDelegate {
    RetainPtr<WKNavigationAction> _navigationAction;
    bool _hasReceivedNavigationCallback;
    bool _hasFinishedNavigation;
}

- (instancetype)init
{
    if (!(self = [super init]))
        return nil;

    _navigationPolicy = WKNavigationActionPolicyAllow;

    return self;
}

- (WKNavigationAction *)navigationAction
{
    return _navigationAction.get();
}

- (void)waitForNavigationActionCallback
{
    _navigationAction = nullptr;
    _hasReceivedNavigationCallback = false;
    TestWebKitAPI::Util::run(&_hasReceivedNavigationCallback);
}

- (void)waitForDidFinishNavigation
{
    _hasFinishedNavigation = false;
    TestWebKitAPI::Util::run(&_hasFinishedNavigation);
}

- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler
{
    decisionHandler(_navigationPolicy);
    _navigationAction = navigationAction;
    _hasReceivedNavigationCallback = true;
}

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

@end

TEST(WKNavigationAction, ShouldPerformDownload_NoDownloadAttribute)
{
    auto navigationDelegate = adoptNS([[NavigationActionTestDelegate alloc] init]);
    auto webView = adoptNS([[TestWKWebView alloc] initWithFrame:NSMakeRect(0, 0, 800, 600)]);
    [webView setNavigationDelegate:navigationDelegate.get()];

    auto baseURL = retainPtr([NSURL URLWithString:@"https://example.com/index.html"]);
    [webView loadHTMLString:@"<a id='link' href='file.txt'>Click Me!</a>" baseURL:baseURL.get()];
    [navigationDelegate waitForDidFinishNavigation];

    [webView evaluateJavaScript:@"document.getElementById('link').click();" completionHandler:nil];
    navigationDelegate.get().navigationPolicy = WKNavigationActionPolicyCancel;
    [navigationDelegate waitForNavigationActionCallback];

    EXPECT_NOT_NULL(navigationDelegate.get().navigationAction);
    EXPECT_FALSE(navigationDelegate.get().navigationAction._shouldPerformDownload);
}

TEST(WKNavigationAction, ShouldPerformDownload_BlankDownloadAttribute_SameOrigin)
{
    auto navigationDelegate = adoptNS([[NavigationActionTestDelegate alloc] init]);
    auto webView = adoptNS([[TestWKWebView alloc] initWithFrame:NSMakeRect(0, 0, 800, 600)]);
    [webView setNavigationDelegate:navigationDelegate.get()];

    auto baseURL = retainPtr([NSURL URLWithString:@"https://example.com/index.html"]);
    [webView loadHTMLString:@"<a id='link' href='file.txt' download>Click Me!</a>" baseURL:baseURL.get()];
    [navigationDelegate waitForDidFinishNavigation];

    [webView evaluateJavaScript:@"document.getElementById('link').click();" completionHandler:nil];
    navigationDelegate.get().navigationPolicy = WKNavigationActionPolicyCancel;
    [navigationDelegate waitForNavigationActionCallback];

    EXPECT_NOT_NULL(navigationDelegate.get().navigationAction);
    EXPECT_TRUE(navigationDelegate.get().navigationAction._shouldPerformDownload);
}

TEST(WKNavigationAction, ShouldPerformDownload_BlankDownloadAttribute_CrossOrigin)
{
    auto navigationDelegate = adoptNS([[NavigationActionTestDelegate alloc] init]);
    auto webView = adoptNS([[TestWKWebView alloc] initWithFrame:NSMakeRect(0, 0, 800, 600)]);
    [webView setNavigationDelegate:navigationDelegate.get()];

    auto baseURL = retainPtr([NSURL URLWithString:@"https://example.com/index.html"]);
    [webView loadHTMLString:@"<a id='link' href='https://not-example-dot-com.com/file.txt' download>Click Me!</a>" baseURL:baseURL.get()];
    [navigationDelegate waitForDidFinishNavigation];

    [webView evaluateJavaScript:@"document.getElementById('link').click();" completionHandler:nil];
    navigationDelegate.get().navigationPolicy = WKNavigationActionPolicyCancel;
    [navigationDelegate waitForNavigationActionCallback];

    EXPECT_NOT_NULL(navigationDelegate.get().navigationAction);
    EXPECT_FALSE(navigationDelegate.get().navigationAction._shouldPerformDownload);
}

TEST(WKNavigationAction, ShouldPerformDownload_DownloadAttribute_SameOrigin)
{
    auto navigationDelegate = adoptNS([[NavigationActionTestDelegate alloc] init]);
    auto webView = adoptNS([[TestWKWebView alloc] initWithFrame:NSMakeRect(0, 0, 800, 600)]);
    [webView setNavigationDelegate:navigationDelegate.get()];

    auto baseURL = retainPtr([NSURL URLWithString:@"https://example.com/index.html"]);
    [webView loadHTMLString:@"<a id='link' href='file.txt' download='file2.txt'>Click Me!</a>" baseURL:baseURL.get()];
    [navigationDelegate waitForDidFinishNavigation];

    [webView evaluateJavaScript:@"document.getElementById('link').click();" completionHandler:nil];
    navigationDelegate.get().navigationPolicy = WKNavigationActionPolicyCancel;
    [navigationDelegate waitForNavigationActionCallback];

    EXPECT_NOT_NULL(navigationDelegate.get().navigationAction);
    EXPECT_TRUE(navigationDelegate.get().navigationAction._shouldPerformDownload);
}

TEST(WKNavigationAction, ShouldPerformDownload_DownloadAttribute_CrossOrigin)
{
    auto navigationDelegate = adoptNS([[NavigationActionTestDelegate alloc] init]);
    auto webView = adoptNS([[TestWKWebView alloc] initWithFrame:NSMakeRect(0, 0, 800, 600)]);
    [webView setNavigationDelegate:navigationDelegate.get()];

    auto baseURL = retainPtr([NSURL URLWithString:@"https://example.com/index.html"]);
    [webView loadHTMLString:@"<a id='link' href='https://not-example-dot-com.com/file.txt' download='file2.txt'>Click Me!</a>" baseURL:baseURL.get()];
    [navigationDelegate waitForDidFinishNavigation];

    [webView evaluateJavaScript:@"document.getElementById('link').click();" completionHandler:nil];
    navigationDelegate.get().navigationPolicy = WKNavigationActionPolicyCancel;
    [navigationDelegate waitForNavigationActionCallback];

    EXPECT_NOT_NULL(navigationDelegate.get().navigationAction);
    EXPECT_FALSE(navigationDelegate.get().navigationAction._shouldPerformDownload);
}