//
//  SnapshotHelper.swift
//  Example
//
//  Created by Felix Krause on 10/8/15.
//  Copyright © 2015 Felix Krause. All rights reserved.
//

import Foundation
import XCTest

var deviceLanguage = ""
var locale = ""

@available(*, deprecated, message: "use setupSnapshot: instead")
func setLanguage(_ app: XCUIApplication) {
    setupSnapshot(app)
}

func setupSnapshot(_ app: XCUIApplication) {
    Snapshot.setupSnapshot(app)
}

func snapshot(_ name: String, waitForLoadingIndicator: Bool = true) {
    Snapshot.snapshot(name, waitForLoadingIndicator: waitForLoadingIndicator)
}

open class Snapshot: NSObject {

    open class func setupSnapshot(_ app: XCUIApplication) {
        setLanguage(app)
        setLocale(app)
        setLaunchArguments(app)
    }

    class func setLanguage(_ app: XCUIApplication) {
        guard let prefix = pathPrefix() else {
            return
        }

        let path = prefix.appendingPathComponent("language.txt")

        do {
            let trimCharacterSet = CharacterSet.whitespacesAndNewlines
            deviceLanguage = try String(contentsOf: path, encoding: .utf8).trimmingCharacters(in: trimCharacterSet)
            app.launchArguments += ["-AppleLanguages", "(\(deviceLanguage))"]
        } catch {
            print("Couldn't detect/set language...")
        }
    }

    class func setLocale(_ app: XCUIApplication) {
        guard let prefix = pathPrefix() else {
            return
        }

        let path = prefix.appendingPathComponent("locale.txt")

        do {
            let trimCharacterSet = CharacterSet.whitespacesAndNewlines
            locale = try String(contentsOf: path, encoding: .utf8).trimmingCharacters(in: trimCharacterSet)
        } catch {
            print("Couldn't detect/set locale...")
        }
        if locale.isEmpty {
            locale = Locale(identifier: deviceLanguage).identifier
        }
        app.launchArguments += ["-AppleLocale", "\"\(locale)\""]
    }

    class func setLaunchArguments(_ app: XCUIApplication) {
        guard let prefix = pathPrefix() else {
            return
        }

        let path = prefix.appendingPathComponent("snapshot-launch_arguments.txt")
        app.launchArguments += ["-FASTLANE_SNAPSHOT", "YES", "-ui_testing"]

        do {
            let launchArguments = try String(contentsOf: path, encoding: String.Encoding.utf8)
            let regex = try NSRegularExpression(pattern: "(\\\".+?\\\"|\\S+)", options: [])
            let matches = regex.matches(in: launchArguments, options: [], range: NSRange(location:0, length:launchArguments.characters.count))
            let results = matches.map { result -> String in
                (launchArguments as NSString).substring(with: result.range)
            }
            app.launchArguments += results
        } catch {
            print("Couldn't detect/set launch_arguments...")
        }
    }

    open class func snapshot(_ name: String, waitForLoadingIndicator: Bool = true) {
        if waitForLoadingIndicator {
            waitForLoadingIndicatorToDisappear()
        }

        print("snapshot: \(name)") // more information about this, check out https://github.com/fastlane/fastlane/tree/master/snapshot#how-does-it-work

        sleep(1) // Waiting for the animation to be finished (kind of)

        #if os(tvOS)
            XCUIApplication().childrenMatchingType(.Browser).count
        #elseif os(OSX)
            XCUIApplication().typeKey(XCUIKeyboardKeySecondaryFn, modifierFlags: [])
        #else
            XCUIDevice.shared().orientation = .unknown
        #endif
    }

    class func waitForLoadingIndicatorToDisappear() {
        #if os(tvOS)
            return
        #endif

        let query = XCUIApplication().statusBars.children(matching: .other).element(boundBy: 1).children(matching: .other)

        while (0..<query.count).map({ query.element(boundBy: $0) }).contains(where: { $0.isLoadingIndicator }) {
            sleep(1)
            print("Waiting for loading indicator to disappear...")
        }
    }

    class func pathPrefix() -> URL? {
        let homeDir: URL
        //on OSX config is stored in /Users/<username>/Library
        //and on iOS/tvOS/WatchOS it's in simulator's home dir
        #if os(OSX)
            guard let user = ProcessInfo().environment["USER"] else {
                print("Couldn't find Snapshot configuration files - can't detect current user ")
                return nil
            }

            guard let usersDir =  FileManager.default.urls(for: .userDirectory, in: .localDomainMask).first else {
                print("Couldn't find Snapshot configuration files - can't detect `Users` dir")
                return nil
            }

            homeDir = usersDir.appendingPathComponent(user)
        #else
            guard let simulatorHostHome = ProcessInfo().environment["SIMULATOR_HOST_HOME"] else {
                print("Couldn't find simulator home location. Please, check SIMULATOR_HOST_HOME env variable.")
                return nil
            }
            guard let homeDirUrl = URL(string: simulatorHostHome) else {
                print("Can't prepare environment. Simulator home location is inaccessible. Does \(simulatorHostHome) exist?")
                return nil
            }
            homeDir = homeDirUrl
        #endif
        return homeDir.appendingPathComponent("Library/Caches/tools.fastlane")
    }
}

extension XCUIElement {
    var isLoadingIndicator: Bool {
        let whiteListedLoaders = ["GeofenceLocationTrackingOn", "StandardLocationTrackingOn"]
        if whiteListedLoaders.contains(self.identifier) {
            return false
        }
        return self.frame.size == CGSize(width: 10, height: 20)
    }
}

// Please don't remove the lines below
// They are used to detect outdated configuration files
// SnapshotHelperVersion [1.3]