/*

 Copyright (C) 2016 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 A class that provides simulated data for the rest of the app.

 */

import UIKit

class ChatItemManager {

    static let sharedInstance = ChatItemManager()

    private(set) var receivedChatItems = [ChatItem]()

    private(set) var friends = [Friend]()

    private(set) var topFriends = [Friend]()

    init() {

        self.createSampleData()

    }

    func friend(for identifier: FriendIdentifier) -> Friend? {

        return friends.first { (friend: Friend) -> Bool in

            return friend.identifier == identifier

        }

    }

    func send(reply: String, to recipient: Friend) {

        // Since AppChat isn't a real chat app yet, we'll just present an alert to simulate sending a reply.

        let format = NSLocalizedString("Reply sent to %@!", comment: "Chat reply sent message format string, the user's name is substituted for the format specifier")

        let message = String(format: format, recipient.name)

        let alert = UIAlertController(title: reply, message: message, preferredStyle: .alert)

        let okAction = UIAlertAction(title: NSLocalizedString("OK", comment: "OK string"), style: .default)

        alert.addAction(okAction)

        UIApplication.shared.present(alert: alert)

    }

    func block(user: Friend) {

        // Since AppChat isn't a real chat app yet, we'll just present an alert to simulate blocking a user.

        let title = NSLocalizedString("User Blocked", comment: "User blocked title")

        let messageFormat = NSLocalizedString("The user %@ has been blocked.", comment: "User blocked format string, the user's name is substituted for the format specifier")

        let alert = UIAlertController(title: title, message: String(format: messageFormat, user.name), preferredStyle: .alert)

        let okAction = UIAlertAction(title: NSLocalizedString("OK", comment: "OK string"), style: .default)

        alert.addAction(okAction)

        UIApplication.shared.present(alert: alert)

    }

    func toggleSaved(chatItem: ChatItem) {

        // Since AppChat isn't a real chat app yet, we'll just present an alert to simulate saving or unsaving a chat.

        let title: String

        let message: String

        if chatItem.saved {

            title = NSLocalizedString("Chat Unsaved", comment: "Chat saved title")

            message = NSLocalizedString("The chat will no longer be saved to your device.", comment: "Chat unsaved message")

        }

        else {

            title = NSLocalizedString("Chat Saved", comment: "Chat saved title")

            message = NSLocalizedString("The chat has been saved to your device.", comment: "Chat unsaved message")

        }

        let alert = UIAlertController(title: title, message: message, preferredStyle: .alert)

        let okAction = UIAlertAction(title: NSLocalizedString("OK", comment: "OK string"), style: .default)

        alert.addAction(okAction)

        UIApplication.shared.present(alert: alert)

    }

    func createSampleData() {

        let nickJones = Friend(identifier: "0", name: "Nick Jones", profilePhoto: UIImage(named: "ProfilePhoto-NickJones.jpg")!)

        let lexiTorres = Friend(identifier: "1", name: "Lexi Torres", profilePhoto: UIImage(named: "ProfilePhoto-LexiTorres.jpg")!)

        let nataliaMaric = Friend(identifier: "2", name: "Natalia Maric", profilePhoto: UIImage(named: "ProfilePhoto-NataliaMaric.jpg")!)

        let peterUrso = Friend(identifier: "3", name: "Peter Urso", profilePhoto: UIImage(named: "ProfilePhoto-PeterUrso.jpg")!)

        let tamsinVantress = Friend(identifier: "4", name: "Tamsin Vantress", profilePhoto: UIImage(named: "ProfilePhoto-TamsinVantress.jpg")!)

        friends = [nickJones, lexiTorres, nataliaMaric, peterUrso, tamsinVantress]

        topFriends = [lexiTorres, nataliaMaric, peterUrso]

        let chat1 = ChatItem(identifier: "8", sender: tamsinVantress, date: getDate(secondsAgo: 10), image: UIImage(named: "ChatImage-1.jpg")!, saved: false)

        let chat2 = ChatItem(identifier: "7", sender: lexiTorres, date: getDate(minutesAgo: 2), image: UIImage(named: "ChatImage-2.jpg")!, saved: false)

        let chat3 = ChatItem(identifier: "6", sender: nataliaMaric, date: getDate(minutesAgo: 5), image: UIImage(named: "ChatImage-3.jpg")!, saved: false)

        let chat4 = ChatItem(identifier: "5", sender: nickJones, date: getDate(minutesAgo: 42), image: UIImage(named: "ChatImage-4.jpg")!, saved: true)

        let chat5 = ChatItem(identifier: "4", sender: peterUrso, date: getDate(hoursAgo: 1), image: UIImage(named: "ChatImage-5.jpg")!, saved: false)

        let chat6 = ChatItem(identifier: "3", sender: nataliaMaric, date: getDate(hoursAgo: 4), image: UIImage(named: "ChatImage-6.jpg")!, saved: true)

        let chat7 = ChatItem(identifier: "2", sender: tamsinVantress, date: getDate(hoursAgo: 14), image: UIImage(named: "ChatImage-7.jpg")!, saved: true)

        let chat8 = ChatItem(identifier: "1", sender: nataliaMaric, date: getDate(daysAgo: 1), image: UIImage(named: "ChatImage-8.jpg")!, saved: true)

        let chat9 = ChatItem(identifier: "0", sender: peterUrso, date: getDate(daysAgo: 3), image: UIImage(named: "ChatImage-9.jpg")!, saved: true)

        receivedChatItems = [chat1, chat2, chat3, chat4, chat5, chat6, chat7, chat8, chat9]

    }

}