//
//  AppContext.swift
//  Passepartout
//
//  Created by Davide De Rosa on 3/17/22.
//  Copyright (c) 2022 Davide De Rosa. All rights reserved.
//
//  https://github.com/passepartoutvpn
//
//  This file is part of Passepartout.
//
//  Passepartout 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.
//
//  Passepartout 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 Passepartout.  If not, see <http://www.gnu.org/licenses/>.
//

import Foundation
import Combine
import PassepartoutCore

@MainActor
class AppContext {
    private let logManager: LogManager
    
    let productManager: ProductManager
    
    let intentsManager: IntentsManager

    let reviewer: Reviewer
    
    private var cancellables: Set<AnyCancellable> = []
    
    init(coreContext: CoreContext) {
        logManager = LogManager(logFile: Constants.Log.appFileURL)
        logManager.logLevel = Constants.Log.logLevel
        logManager.logFormat = Constants.Log.logFormat
        logManager.configureLogging()
        pp_log.info("Logging to: \(logManager.logFile!)")
        
        productManager = ProductManager(
            appType: Constants.InApp.appType,
            buildProducts: Constants.InApp.buildProducts
        )
        intentsManager = IntentsManager()
        reviewer = Reviewer()
        reviewer.eventCountBeforeRating = Constants.Rating.eventCount
        
        // post
        
        configureObjects(coreContext: coreContext)
    }
    
    private func configureObjects(coreContext: CoreContext) {
        coreContext.vpnManager.currentState.$vpnStatus
            .removeDuplicates()
            .sink {
                if $0 == .connected {
                    pp_log.info("VPN successful connection, report to Reviewer")
                    self.reviewer.reportEvent()
                }
        }.store(in: &cancellables)

        coreContext.vpnManager.isOnDemandRulesSupported = {
            self.isEligibleForOnDemandRules()
        }
    }
    
    // eligibility: ignore network settings if ineligible
    private func isEligibleForNetworkSettings() -> Bool {
        guard productManager.isEligible(forFeature: .networkSettings) else {
            pp_log.warning("Ignore network settings, not eligible")
            return false
        }
        return true
    }
    
    // eligibility: reset on-demand rules if no trusted networks
    private func isEligibleForOnDemandRules() -> Bool {
        guard productManager.isEligible(forFeature: .trustedNetworks) else {
            pp_log.warning("Ignore on-demand rules, not eligible for trusted networks")
            return false
        }
        return true
    }
}