//
//  RemoteConfigManager.swift
//  Viddl
//
//  Created by Alex Azarov on 8/15/18.
//  Copyright © 2018 Mikhail Lyapich. All rights reserved.
//

import FirebaseRemoteConfig

class RemoteConfigManager {

    enum Keys: String {
        case freeScenesLimit = "free_scenes_limit"
        case freeVideosLimit = "free_videos_limit"
        case serverNgrokUrl = "server_ngrok_url"
        case onboardingVideoCardAlways = "onboarding_video_card_always"
        case sharingDefaultHashtags = "sharing_default_hashtags"
        case ngrokUsername = "server_ngrok_username"
        case ngrokPassword = "server_ngrok_password"
    }

    enum IntKeys: String {
        case serverTimeout = "server_timeout"
    }

    private static let serverURL = "http://074752d9.ngrok.io"
    static let shared = RemoteConfigManager()

    let appDefaults: [String: Any?] = [
        Keys.freeScenesLimit.rawValue: "3",
        Keys.freeVideosLimit.rawValue: "1",
        Keys.serverNgrokUrl.rawValue: RemoteConfigManager.serverURL,
        Keys.onboardingVideoCardAlways.rawValue: "1",
        Keys.sharingDefaultHashtags.rawValue: "#viddl"
    ]

    var freeScenesLimit: Int {
        return RemoteConfig.remoteConfig().configValue(forKey: Keys.freeScenesLimit.rawValue).numberValue as? Int ?? 3
    }

    var freeVideosLimit: Int {
        return RemoteConfig.remoteConfig().configValue(forKey: Keys.freeVideosLimit.rawValue).numberValue as? Int ?? 1
    }

    var serverURL: String {
        return RemoteConfig.remoteConfig().configValue(forKey: Keys.serverNgrokUrl.rawValue).stringValue ?? RemoteConfigManager.serverURL
    }

    var needToShowTutorialEveryTime: Bool {
        return RemoteConfig.remoteConfig().configValue(forKey: Keys.onboardingVideoCardAlways.rawValue).boolValue
    }

    var sharingDefaultHashtags: String {
        return RemoteConfig.remoteConfig().configValue(forKey: Keys.sharingDefaultHashtags.rawValue).stringValue ?? (appDefaults[Keys.sharingDefaultHashtags.rawValue] as? String)!
    }

    var ngrokUsername: String {
        return RemoteConfig.remoteConfig().configValue(forKey: Keys.ngrokUsername.rawValue).stringValue ?? ""
    }

    var ngrokPassword: String {
        return RemoteConfig.remoteConfig().configValue(forKey: Keys.ngrokPassword.rawValue).stringValue ?? ""
    }

    private init() {
        loadDefaultValues()
        fetchCloudValues()
    }

    private func loadDefaultValues() {
        RemoteConfig.remoteConfig().setDefaults(appDefaults as? [String: NSObject])
    }

    private func fetchCloudValues() {

        let fetchDuration: TimeInterval = 0
        activateDebugMode()
        RemoteConfig.remoteConfig().fetch(withExpirationDuration: fetchDuration) { (status, error) in
            if let error = error {
                print("Got an error fetching remote values \(error)")
                return
            }
            RemoteConfig.remoteConfig().activateFetched()
        }
    }

    private func activateDebugMode() {
        RemoteConfig.remoteConfig().configSettings = RemoteConfigSettings(developerModeEnabled: true)
    }

    private func getRemoteIntDefaults(key: IntKeys) -> Int {
        switch key {
        case .serverTimeout:
            return 180
        }
    }

    func getInt(key: IntKeys) -> Int {
        let remoteNumber = RemoteConfig.remoteConfig().configValue(forKey: key.rawValue).numberValue
        return remoteNumber?.intValue ?? getRemoteIntDefaults(key: key)
    }
}