/* 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 XCTest

class BaseTestCase: XCTestCase {

    override func setUp() {
        super.setUp()
        continueAfterFailure = false
        let app = XCUIApplication()
        app.terminate()
        restart(app, args: [LaunchArguments.ClearProfile, LaunchArguments.SkipIntro, LaunchArguments.SkipWhatsNew])
    }

    override func tearDown() {
        XCUIApplication().terminate()
        super.tearDown()
    }

    func restart(_ app: XCUIApplication, args: [String] = []) {
        XCUIDevice.shared().press(.home)
        var launchArguments = [LaunchArguments.Test]
        args.forEach { arg in
            launchArguments.append(arg)
        }
        app.launchArguments = launchArguments
        app.activate()
    }

    //If it is a first run, first run window should be gone
    func dismissFirstRunUI() {
        let firstRunUI = XCUIApplication().scrollViews["IntroViewController.scrollView"]

        if firstRunUI.exists {
            firstRunUI.swipeLeft()
            XCUIApplication().buttons["Start Browsing"].tap()
        }
    }

    func waitforExistence(_ element: XCUIElement, file: String = #file, line: UInt = #line) {
        waitFor(element, with: "exists == true", file: file, line: line)
    }

    func waitforNoExistence(_ element: XCUIElement, timeoutValue: TimeInterval = 5.0, file: String = #file, line: UInt = #line) {
        waitFor(element, with: "exists != true", timeout: timeoutValue, file: file, line: line)
    }

    func waitForValueContains(_ element: XCUIElement, value: String, file: String = #file, line: UInt = #line) {
        waitFor(element, with: "value CONTAINS '\(value)'", file: file, line: line)
    }

    private func waitFor(_ element: XCUIElement, with predicateString: String, description: String? = nil, timeout: TimeInterval = 5.0, file: String, line: UInt) {
        let predicate = NSPredicate(format: predicateString)
        let expectation = XCTNSPredicateExpectation(predicate: predicate, object: element)
        let result = XCTWaiter().wait(for: [expectation], timeout: timeout)
        if result != .completed {
            let message = description ?? "Expect predicate \(predicateString) for \(element.description)"
            self.recordFailure(withDescription: message, inFile: file, atLine: line, expected: false)
        }
    }

    func loadWebPage(_ url: String, waitForLoadToFinish: Bool = true, file: String = #file, line: UInt = #line) {
        let app = XCUIApplication()
        UIPasteboard.general.string = url
        app.textFields["url"].press(forDuration: 2.0)
        app.sheets.element(boundBy: 0).buttons.element(boundBy: 0).tap()

        if waitForLoadToFinish {
            let finishLoadingTimeout: TimeInterval = 30
            let progressIndicator = app.progressIndicators.element(boundBy: 0)
            waitFor(progressIndicator,
                    with: "exists != true",
                    description: "Problem loading \(url)",
                    timeout: finishLoadingTimeout,
                    file: file, line: line)
        }
    }

    func iPad() -> Bool {
        if UIDevice.current.userInterfaceIdiom == .pad {
            return true
        }
        return false
    }

    func waitUntilPageLoad() {
        let app = XCUIApplication()
        let progressIndicator = app.progressIndicators.element(boundBy: 0)

        waitforNoExistence(progressIndicator, timeoutValue: 20.0)
    }
}

extension BaseTestCase {
    func tabTrayButton(forApp app: XCUIApplication) -> XCUIElement {
        return app.buttons["TopTabsViewController.tabsButton"].exists ? app.buttons["TopTabsViewController.tabsButton"] : app.buttons["TabToolbar.tabsButton"]
    }
}

extension XCUIElement {
    func tap(force: Bool) {
        // There appears to be a bug with tapping elements sometimes, despite them being on-screen and tappable, due to hittable being false.
        // See: http://stackoverflow.com/a/33534187/1248491
        if isHittable {
            tap()
        } else if force {
            coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.5)).tap()
        }
    }
}