//
//  EQNUserDefaultsCommand.swift
//  Earthquake Network
//
//  Created by Busi Andrea on 26/09/2020.
//  Copyright © 2020 Earthquake Network. All rights reserved.
//

import Foundation
import CoreLocation


public class EQNUserDefaultsCommand: EQNCommandProtocol {
    
    // MARK: - Public
    
    func execute() {
        print("[EQNUserDefaultsCommand] Start execute")
        
        applyDefaultSettings()
        saveMissingValues()
        
        migrationV5_3()
        migrationV5_4()
        migrationV5_8()
    }
    
    // MARK: - Private
    
    private func applyDefaultSettings() {
        
        // seismic card settings
        if UserDefaults.standard.array(forKey: EQNUserDefaultKeySesmicInformations) == nil {
            let informations: [SeismicNetworkTableViewCell.InformationType] = [.buttons, .distance, .coordinate, .population]
            UserDefaults.standard.set(informations.map { $0.rawValue }, forKey: EQNUserDefaultKeySesmicInformations)
        }
    }
    
    private func saveMissingValues() {
        // `raggio sismi forti` was not saved before v2.3
        if UserDefaults.standard.object(forKey: UserDefaults.AllertaSismicaRaggioSismiForti) == nil {
            UserDefaults.standard.set("600", forKey: UserDefaults.AllertaSismicaRaggioSismiForti)
        }
    }
    
    private func migrationV5_3() {
        let migrationPerformed = UserDefaults.standard.bool(forKey: UserDefaults.AppMigrationV5_3)
        if migrationPerformed {
            print("[EQNUserDefaultsCommand] Migration v5.3 already performed")
            return
        }
        
        // l'ultima posizione era salvata come array, la trasformiamo in valore singolo
        let lastLocations = EQNUtility.loadArray(of: CLLocation.self, fromUserDefaultsForKey: UserDefaults.UserDataLastLocation) as? [CLLocation]
        if let lastLocation = lastLocations?.last {
            UserDefaults.standard.removeObject(forKey: UserDefaults.UserDataLastLocation)
            EQNUserData.shared.saveLastLocation(lastLocation)
        }
        
        // resettiamo il Firebase token in modo da ri-eseguire la procedura di registrazione corretta
        EQNUserData.shared.saveFirebaseToken(nil)
        
        UserDefaults.standard.set(true, forKey: UserDefaults.AppMigrationV5_3)
    }
    
    private func migrationV5_4() {
        let migrationPerformed = UserDefaults.standard.bool(forKey: UserDefaults.AppMigrationV5_4)
        if migrationPerformed {
            print("[EQNUserDefaultsCommand] Migration v5.4 already performed")
            return
        }
        
        // migriamo l'ultima posizione negli user defaults condivisi
        let userDefaults = UserDefaults.standard
        let groupUserDefaults = UserDefaults.appGroup
        if let encodedLocation = userDefaults.object(forKey: UserDefaults.UserDataLastLocation) as? Data {
            groupUserDefaults?.set(encodedLocation, forKey: UserDefaults.UserDataLastLocation)
        }
        
        userDefaults.set(true, forKey: UserDefaults.AppMigrationV5_4)
    }
    
    private func migrationV5_8() {
        let migrationPerformed = UserDefaults.standard.bool(forKey: UserDefaults.AppMigrationV5_8)
        if migrationPerformed {
            print("[EQNUserDefaultsCommand] Migration v5.8 already performed")
            return
        }

        // delete old notification settings
        let userDefaults = UserDefaults.standard
        [
            "NOTIFICHE_ATTIVA_RETI_SISMICHE_VICINE", "NOTIFICHE_ATTIVA_RETI_TERREMOTI_FORTI",
            "NOTIFICHE_ATTIVA_RETI_ENERGIA_FORTI", "NOTIFICHE_ATTIVA_RETI_LISTA_ENTI"
        ].forEach { key in
            userDefaults.removeObject(forKey: key)
        }
        
        // delete old filter values
        [
            "EQN_ETA_MASSIMA", "EQN_SISMI_FORTI_ABILITATI", "EQN_SISMI_FORTI",
            "EQN_SISMI_QUALSIASI_MAGNITUDO", "EQN_SISMI_MODIFICA_IMPOSTAZIONI"
        ].forEach { key in
            userDefaults.removeObject(forKey: key)
        }
        
        // delete old "real time alert" settings
        [
            "NOTIFICHE_ALLERA_SISMICA_IMPOSTA_VOLUME", "NOTIFICHE_ALLERA_SISMICA_TESTA_ALLARME",
            "NOTIFICHE_ALLERA_SISMICA_ABILITA_INTERVALLO", "NOTIFICHE_ALLERA_SISMICA_ORA_INIZIO",
            "NOTIFICHE_ALLERA_SISMICA_ORA_INIZIO"
        ].forEach { key in
            userDefaults.removeObject(forKey: key)
        }
        
        userDefaults.set(true, forKey: UserDefaults.AppMigrationV5_8)
    }
}