//
//  VPNLogger.swift
//  Privado
//
//  Created by Juraldinio on 11/20/19.
//  Copyright © 2019 Omicronmedia. All rights reserved.
//

import Foundation

final class VPNLogger: VPNCometLoggerProtocol {
    
    var type: CometLoggerType = .plain
    
    var isActive = true
    
    
    private enum Constants {
        static let tag = "VPN"
    }
    
    func vpnLog(type: String, error: Error) {
        self.save(tag: Constants.tag, label: type, payload: error.localizedDescription)
    }
    
    func vpnEvent(type: String, message: String, secured: String?) {
        self.save(tag: Constants.tag, label: type, payload: message + (secured ?? ""))
    }
    
    func vpnEvent(name: String, attributes: [String: Any]?, secured: [String: Any]?) {
        
        let payloadDict = (attributes ?? [:]).reduce(secured ?? [:]) { acc, elem in
            var acc = acc
            acc[elem.0] = elem.1
            return acc
        }
        
        let payload = payloadDict.compactMap { (key, value) -> String? in
            guard let dic = value as? [String: Any] else {
                return "\(key) = \(value)"
            }
            return "[" + dic.compactMap { (ikey, ivalue) -> String? in
                return "\(ikey) = \(ivalue)"
            }.joined(separator: "; ") + "]"
        }.joined(separator: "; ")
        
        self.save(tag: Constants.tag, label: name, payload: payload)
    }
    
    // MARK: - Private
    
    private func save(tag: String, label: String, payload: String) {
        
        guard let coordinator = DatabaseAnswer.commonDB else { return }
        
        let context = coordinator.createContext()
        let log: LogRecord = context.create()
        
        log.uuid = UUID().uuidString
        log.tag = tag
        log.label = label
        log.date = Date()
        log.payload = payload
        
        context.save()
        coordinator.save()
    }
    
}