SideStore/AltStore/LaunchViewController.swift

//
//  LaunchViewController.swift
//  AltStore
//
//  Created by Riley Testut on 7/30/19.
//  Copyright © 2019 Riley Testut. All rights reserved.
//

import UIKit
import Roxas
import EmotionalDamage
import minimuxer

import AltStoreCore

class LaunchViewController: RSTLaunchViewController
{
    private var didFinishLaunching = false
    
    private var destinationViewController: UIViewController!
    
    override var launchConditions: [RSTLaunchCondition] {
        let isDatabaseStarted = RSTLaunchCondition(condition: { DatabaseManager.shared.isStarted }) { (completionHandler) in
            DatabaseManager.shared.start(completionHandler: completionHandler)
        }

        return [isDatabaseStarted]
    }
    
    override var childForStatusBarStyle: UIViewController? {
        return self.children.first
    }
    
    override var childForStatusBarHidden: UIViewController? {
        return self.children.first
    }
    
    override func viewDidLoad()
    {
        defer {
            // Create destinationViewController now so view controllers can register for receiving Notifications.
            self.destinationViewController = self.storyboard!.instantiateViewController(withIdentifier: "tabBarController") as! TabBarController
        }
        super.viewDidLoad()
    }
    
    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(true)
        start_em_proxy(bind_addr: Consts.Proxy.serverURL)
        
        guard let pf = fetchPairingFile() else {
            displayError("Device pairing file not found.")
            return
        }
        set_usbmuxd_socket()
        let res = start_minimuxer(pairing_file: pf)
        if res != 0 {
            displayError("minimuxer failed to start. Incorrect arguments were passed.")
        }
        auto_mount_dev_image()
    }
    
    func fetchPairingFile() -> String? {
        let filename = "ALTPairingFile.mobiledevicepairing"
        let fm = FileManager.default
        let documentsPath = fm.documentsDirectory.appendingPathComponent("/\(filename)")
        if fm.fileExists(atPath: documentsPath.path), let contents = try? String(contentsOf: documentsPath), !contents.isEmpty {
            print("Loaded ALTPairingFile from \(documentsPath.path)")
            return contents
        } else if
            let appResourcePath = Bundle.main.url(forResource: "ALTPairingFile", withExtension: "mobiledevicepairing"),
            fm.fileExists(atPath: appResourcePath.path),
            let data = fm.contents(atPath: appResourcePath.path),
            let contents = String(data: data, encoding: .utf8),
            !contents.isEmpty  {
            print("Loaded ALTPairingFile from \(appResourcePath.path)")
            return contents
        } else if let plistString = Bundle.main.object(forInfoDictionaryKey: "ALTPairingFile") as? String, !plistString.isEmpty, !plistString.contains("insert pairing file here"){
            print("Loaded ALTPairingFile from Info.plist")
            return plistString
        } else {
            return nil
        }
    }
    
    func displayError(_ msg: String) {
        print(msg)
        // Create a new alert
        let dialogMessage = UIAlertController(title: "Error launching SideStore", message: msg, preferredStyle: .alert)

        // Present alert to user
        self.present(dialogMessage, animated: true, completion: nil)
    }
}

extension LaunchViewController
{
    override func handleLaunchError(_ error: Error)
    {
        do
        {
            throw error
        }
        catch let error as NSError
        {
            let title = error.userInfo[NSLocalizedFailureErrorKey] as? String ?? NSLocalizedString("Unable to Launch SideStore", comment: "")
            
            let alertController = UIAlertController(title: title, message: error.localizedDescription, preferredStyle: .alert)
            alertController.addAction(UIAlertAction(title: NSLocalizedString("Retry", comment: ""), style: .default, handler: { (action) in
                self.handleLaunchConditions()
            }))
            self.present(alertController, animated: true, completion: nil)
        }
    }
    
    override func finishLaunching()
    {
        super.finishLaunching()
        
        guard !self.didFinishLaunching else { return }
        
        AppManager.shared.update()
        AppManager.shared.updatePatronsIfNeeded()        
        PatreonAPI.shared.refreshPatreonAccount()
        
        // Add view controller as child (rather than presenting modally)
        // so tint adjustment + card presentations works correctly.
        self.destinationViewController.view.frame = CGRect(x: 0, y: 0, width: self.view.bounds.width, height: self.view.bounds.height)
        self.destinationViewController.view.alpha = 0.0
        self.addChild(self.destinationViewController)
        self.view.addSubview(self.destinationViewController.view, pinningEdgesWith: .zero)
        self.destinationViewController.didMove(toParent: self)
        
        UIView.animate(withDuration: 0.2) {
            self.destinationViewController.view.alpha = 1.0
        }
        
        self.didFinishLaunching = true
    }
}