//
//  AnalyticsManager.swift
//  1Flow (https://1flow.app?ref=analytics_manager)
//
//  Created by 1Flow on 29/09/22.
//

// import analytics libraries
import Foundation
import UIKit
import Firebase
import Mixpanel
import _1Flow

class AnalyticsManager {

    // set SDK tokens and keys
    static let oneFlowToken = "example_1flow_token"
    static let mixPanelToken = "example_mixpanel_token"

    // configure and initialize all SDKs
    class func configure() {
        // Firebase
        FirebaseApp.configure()

        // Mixpanel
        Mixpanel.initialize(token: mixPanelToken, trackAutomaticEvents: true)

        // 1Flow
        OneFlow.configure(oneFlowToken)
    }

    // to track event with properties
    class func track(_ event: String, properties: [String:Any]?) {
        print("[DEBUG] track(", event, ", properties: ", properties ?? [], ")")

        // Firebase
        Analytics.logEvent(event, parameters: properties)

        // Mixpanel
        Mixpanel.mainInstance().track(event: event, properties: properties as? Properties)

        // 1Flow
        OneFlow.recordEventName(event, parameters: properties)
    }

    // to identify user across analytics with traits.
    // recommended: you should call identify() on every new session.
    class func identify(_ userId: String, traits: [String:String]) {
        print("[DEBUG] identify(", userId, ", traits: ", traits, ")")

        // Firebase
        Analytics.setUserID(userId)
        for (key, value) in traits {
            Analytics.setUserProperty(value, forName: key)
        }

        // Mixpanel
        Mixpanel.mainInstance().identify(distinctId: userId)
        Mixpanel.mainInstance().people.set(properties: traits)

        // 1Flow
        OneFlow.logUser(userId, userDetails: traits)
    }
    
    // returns the userId string for the current user
    // TODO: fetch userId from your database and 
    // use the same userId across all SDKs.
    class func getUserId() -> String? {
        // in this example below, we're using Firebase userID
        if Auth.auth().currentUser != nil { // signed in
            // Example: return Firebase ID
            return Auth.auth().currentUser?.uid as? String
        
        } else { // not signed in
            // Example: return deviceID string to use as userId
            return UIDevice.current.identifierForVendor?.uuidString
        }
    }
}