/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

import Foundation
import WebKit
import Shared
import EarlGrey
import SwiftyJSON

/// This test should be disabled since session restore does not seem to work
class SessionRestoreTests: KIFTestCase {
    fileprivate var webRoot: String!
    
    override func setUp() {
        webRoot = SimplePageServer.start()
        BrowserUtils.dismissFirstRunUI()
        super.setUp()
    }
    
    func testTabRestore() {
        let url1 = "\(webRoot!)/numberedPage.html?page=1"
        let url2 = "\(webRoot!)/numberedPage.html?page=2"
        let url3 = "\(webRoot!)/numberedPage.html?page=3"
        
        // Build a session restore URL from the current homepage URL.
        var jsonDict = [String: Any]()
        jsonDict["history"] = [url1, url2, url3]
        jsonDict["currentPage"] = -1 as Any?
        let json = JSON(jsonDict)
        let escapedJSON = json.stringValue()?.addingPercentEncoding(withAllowedCharacters: CharacterSet.URLAllowedCharacterSet())
        let webView = tester().waitForView(withAccessibilityLabel: "Web content") as! WKWebView
        let restoreURL = URL(string: "/about/sessionrestore?history=\(escapedJSON!)", relativeTo: webView.url!)
        
        // Enter the restore URL and verify the back/forward history.
        // After triggering the restore, the session should look like this:
        //   about:home, page1, *page2*, page3
        // where page2 is active.
        EarlGrey.select(elementWithMatcher: grey_accessibilityID("url"))
            .perform(grey_tap())
        EarlGrey.select(elementWithMatcher: grey_accessibilityID("address"))
            .perform(grey_replaceText(restoreURL!.absoluteString))
        EarlGrey.select(elementWithMatcher: grey_accessibilityID("address"))
            .perform(grey_typeText("\n"))
        tester().waitForWebViewElementWithAccessibilityLabel("Page 2")
        EarlGrey.select(elementWithMatcher: grey_accessibilityLabel("Back"))
            .perform(grey_tap())
        
        tester().waitForWebViewElementWithAccessibilityLabel("Page 1")
        EarlGrey.select(elementWithMatcher: grey_accessibilityLabel("Back"))
            .perform(grey_tap())
        let wentBack = GREYCondition(name: "Check browser went back", block: { _ in
            var errorOrNil: NSError?
            let matcher = grey_allOf([grey_accessibilityLabel("Top sites"),
                                              grey_sufficientlyVisible()])
            EarlGrey.select(elementWithMatcher: matcher).assert(grey_notNil(), error: &errorOrNil)
            let success = errorOrNil == nil
            return success
        }).wait(withTimeout: 5)
        GREYAssertTrue(wentBack, reason: "Didn't go back")
        
        let canGoBack: Bool
        do {
            try tester().tryFindingTappableView(withAccessibilityLabel: "Back")
            canGoBack = true
        } catch _ {
            canGoBack = false
        }
        XCTAssertFalse(canGoBack, "Reached the beginning of browser history")
        
        EarlGrey.select(elementWithMatcher: grey_accessibilityLabel("Forward"))
            .perform(grey_tap())
        EarlGrey.select(elementWithMatcher: grey_accessibilityLabel("Forward"))
            .perform(grey_tap())
        EarlGrey.select(elementWithMatcher: grey_accessibilityLabel("Forward"))
            .perform(grey_tap())
        tester().waitForWebViewElementWithAccessibilityLabel("Page 3")
        let canGoForward: Bool
        do {
            try tester().tryFindingTappableView(withAccessibilityLabel: "Forward")
            canGoForward = true
        } catch _ {
            canGoForward = false
        }
        XCTAssertFalse(canGoForward, "Reached the end of browser history")
    }
    
    override func tearDown() {
        BrowserUtils.resetToAboutHome(tester())
        BrowserUtils.clearPrivateData(tester: tester())
    }
}