/*
 * Copyright (c) 2010-2023 Belledonne Communications SARL.
 *
 * This file is part of Linphone
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

import Foundation
import linphonesw

class ContactAvatarModel: ObservableObject {
	
	let friend: Friend?
	
	let withPresence: Bool?

	@Published var lastPresenceInfo: String

	@Published var presenceStatus: ConsolidatedPresence
	
	private var friendDelegate: FriendDelegate?
	
	init(friend: Friend?, withPresence: Bool?) {
		self.friend = friend
		self.withPresence = withPresence
        if friend != nil &&
			withPresence == true {
			self.lastPresenceInfo = ""
			
			self.presenceStatus = friend!.consolidatedPresence
			
			if friend!.consolidatedPresence == .Online || friend!.consolidatedPresence == .Busy {
				if friend!.consolidatedPresence == .Online || friend!.presenceModel!.latestActivityTimestamp != -1 {
					self.lastPresenceInfo = friend!.consolidatedPresence == .Online ? "Online" : getCallTime(startDate: friend!.presenceModel!.latestActivityTimestamp)
				} else {
					self.lastPresenceInfo = "Away"
				}
			} else {
				self.lastPresenceInfo = ""
			}
            
            if self.friendDelegate != nil {
                self.friend!.removeDelegate(delegate: self.friendDelegate!)
                self.friendDelegate = nil
            }
			
			addDelegate()
        } else {
            self.lastPresenceInfo = ""
            self.presenceStatus = .Offline
        }
	}
	
	func addDelegate() {
		let newFriendDelegate = FriendDelegateStub(
			onPresenceReceived: { (linphoneFriend: Friend) -> Void in
				DispatchQueue.main.sync {
					self.presenceStatus = linphoneFriend.consolidatedPresence
					if linphoneFriend.consolidatedPresence == .Online || linphoneFriend.consolidatedPresence == .Busy {
						if linphoneFriend.consolidatedPresence == .Online || linphoneFriend.presenceModel!.latestActivityTimestamp != -1 {
							self.lastPresenceInfo = linphoneFriend.consolidatedPresence == .Online ? "Online" : self.getCallTime(startDate: linphoneFriend.presenceModel!.latestActivityTimestamp)
						} else {
							self.lastPresenceInfo = "Away"
						}
					} else {
						self.lastPresenceInfo = ""
					}
				}
			}
		)
		
		friendDelegate = newFriendDelegate
		if friendDelegate != nil {
			friend!.addDelegate(delegate: friendDelegate!)
		}
	}
	
	func removeAllDelegate() {
		if friendDelegate != nil {
			presenceStatus = .Offline
			friend!.removeDelegate(delegate: friendDelegate!)
			friendDelegate = nil
		}
	}
	
	func getCallTime(startDate: time_t) -> String {
		let timeInterval = TimeInterval(startDate)
		
		let myNSDate = Date(timeIntervalSince1970: timeInterval)
		
		if Calendar.current.isDateInToday(myNSDate) {
			let formatter = DateFormatter()
			formatter.dateFormat = Locale.current.identifier == "fr_FR" ? "HH:mm" : "h:mm a"
			return "Online today at " + formatter.string(from: myNSDate)
		} else if Calendar.current.isDateInYesterday(myNSDate) {
			let formatter = DateFormatter()
			formatter.dateFormat = Locale.current.identifier == "fr_FR" ? "HH:mm" : "h:mm a"
			return "Online yesterday at " + formatter.string(from: myNSDate)
		} else if Calendar.current.isDate(myNSDate, equalTo: .now, toGranularity: .year) {
			let formatter = DateFormatter()
			formatter.dateFormat = Locale.current.identifier == "fr_FR" ? "dd/MM | HH:mm" : "MM/dd | h:mm a"
			return "Online on " + formatter.string(from: myNSDate)
		} else {
			let formatter = DateFormatter()
			formatter.dateFormat = Locale.current.identifier == "fr_FR" ? "dd/MM/yy | HH:mm" : "MM/dd/yy | h:mm a"
			return "Online on " + formatter.string(from: myNSDate)
		}
	}
}