Hinduja-LMS/LMS/View Controller/ScromViewController.swift

//
//  ScromViewController.swift
//  LMS
//
//  Created by Suraj Kumar Mandal on 18/01/23.
//

import UIKit
import Toast_Swift      
import WebKit
import Zip

class ScromViewController: UIViewController {
    
    @IBOutlet var navigationBar: UINavigationBar!
    @IBOutlet var htmlWebView: WKWebView!
    
    var viewModel = ScromViewModel()
    var id = String()
    var docType = String()
    var name = String()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // Do any additional setup after loading the view.
        navigationBar.topItem?.title = name
        viewModel.delegate = self
        getScromData()
        
        let value = UIInterfaceOrientation.landscapeLeft.rawValue
        UIDevice.current.setValue(value, forKey: "orientation")
    }
    
    override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        let value = UIInterfaceOrientation.portrait.rawValue
        UIDevice.current.setValue(value, forKey: "orientation")
    }
    
    func getScromData() {
        if Reachability.isConnectedToNetwork() {
            let stringData = id.description.components(separatedBy: "scrom/unzip/")
            viewModel.getScromData(fileId: stringData[1])
        } else {
            Alert.showInternetFailureAlert(on: self)
        }
    }
    
    func decodeToZip(base64String: String) {
        let data = Data(base64Encoded: base64String, options: .ignoreUnknownCharacters)
        if let data = data {
            let documentsPath = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0]
            let docName = "\(name).zip"
            let filePath = "\(documentsPath)/\(docName)"
            let url = URL(fileURLWithPath: filePath)
            try? data.write(to: url)
            
            unzipFile()
        }
    }
    
    func unzipFile() {
        do {
            let filePath = URL(string: "\(NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0])/\(name).zip")!
            let fileURL = try Zip.quickUnzipFile(filePath)
            let htmlFileURL = fileURL.appendingPathComponent("index.html")
            loadHTMLFile(htmlFileURL)
        } catch {
            print("Error unzipping file: \(error)")
        }
    }
    
    func loadHTMLFile(_ fileURL: URL) {
        let request = URLRequest(url: fileURL)
        htmlWebView.load(request)
    }
    
    
    
    /*
     // MARK: - Navigation
     
     // In a storyboard-based application, you will often want to do a little preparation before navigation
     override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
     // Get the new view controller using segue.destination.
     // Pass the selected object to the new view controller.
     }
     */
    
    @IBAction func backAction(_ sender: UIBarButtonItem) {
        self.navigationController?.popViewController(animated: true)
    }
    
}

extension ScromViewController: ScromProtocol {
    func startLoader() {
        ActivityIndicator.start()
    }
    
    func stopLoader() {
        ActivityIndicator.stop()
    }
    
    func showError(error: String) {
        self.view.makeToast(error)
    }
    
    func scromBase64(base64: String) {
        self.decodeToZip(base64String: base64)
    }
}