//
//  MoleculeReplacementViewController.swift
//  JSONCreator
//
//  Created by Kyle Hedden on 7/9/24.
//  Copyright © 2024 Verizon Wireless. All rights reserved.
//

import UIKit
import MVMCoreUI

class MoleculeReplacementViewController: UIViewController {
    let textView = UITextView(frame: .zero)

    var replaceCallback: (([AnyHashable : Any], MVMCoreLoadObject, _ delay: TimeInterval, _ replay: Bool)->Void)?
    
    var applicationDelay = 3.0
    var replay = false
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        guard textView.superview == nil else {
            return
        }
        
        modalPresentationStyle = .fullScreen
        view.addSubview(textView)
        textView.font = UIFont.systemFont(ofSize: 14)
        textView.translatesAutoresizingMaskIntoConstraints = false
        textView.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
        textView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor).isActive = true
        view.trailingAnchor.constraint(equalTo: textView.trailingAnchor).isActive = true
        view.safeAreaLayoutGuide.bottomAnchor.constraint(equalTo: textView.bottomAnchor).isActive = true
        textView.delegate = self
        textView.smartDashesType = .no
        textView.smartQuotesType = .no
        textView.smartInsertDeleteType = .no
        textView.autocapitalizationType = .none
        textView.autocorrectionType = .no
        
        if let data = UserDefaults.standard.data(forKey: "priorReplace"),
           let prior = String(data: data, encoding: .utf8) {
            textView.text = prior
        } else {
            textView.text = """
            {
              "ResponseInfo" : {
                "code" : "00000",
                "type" : "Success"
              },
              "ModuleMap": {
            
               }
            }
            """
        }
        
        let clearButton = UIBarButtonItem(barButtonSystemItem: .trash, target: self, action: #selector(clearButtonPressed))
        let buildButton = UIBarButtonItem(barButtonSystemItem: .play, target: self, action: #selector(play))
        navigationItem.setRightBarButtonItems([clearButton, buildButton], animated: true)
        navigationItem.title = "Trigger Update"
        resetToolbarItems()
    }
    
    func resetToolbarItems() {
        if #available(iOS 16.0, *) {
            let spacer = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: self, action: nil)
            let delayButton = UIBarButtonItem(title: "\(applicationDelay)s", image: nil, target: self, action: #selector(delay))
            let replayButton = UIBarButtonItem(barButtonSystemItem: replay ? .refresh : .compose, target: self, action: #selector(toggleReplay))
            setToolbarItems([spacer, delayButton, replayButton], animated: true)
        }
    }
    
    func showError(_ error: NSError) {
        let alert = UIAlertController(title: "Error", message: "\(error)", preferredStyle: .alert)
        alert.addAction(UIAlertAction(title: "Ok", style: .cancel, handler: nil))
        present(alert, animated: true, completion: nil)
    }
    
    @objc func clearButtonPressed() {
        textView.text = ""
        UserDefaults.standard.removeObject(forKey: "priorReplace")
    }
    
    @objc func play() {
        do {
            if let data = textView.text.data(using: .utf8), 
               let rawServerResponse = try JSONSerialization.jsonObject(with: data, options: []) as? [AnyHashable: Any],
               let modulesJSON = rawServerResponse["ModuleMap"] as? [AnyHashable: Any] {
                
                UserDefaults.standard.set(data, forKey: "priorReplace")
                
                let loadObject = MVMCoreLoadObject(pageJSON: nil, modulesJSON: modulesJSON, requestParameters: nil, dataForPage: nil, delegateObject: nil)!
                
                replaceCallback?(rawServerResponse, loadObject, applicationDelay, replay)
            }
        } catch {
            showError(error as NSError)
        }
    }
    
    @objc func delay() {
        let alert = UIAlertController(title: "Delay", message: "Set delay", preferredStyle: .alert)
        alert.addTextField { textField in
            textField.text = "\(self.applicationDelay)"
            textField.placeholder = "Delay in seconds"
        }
        let action = UIAlertAction(title: "Confirm", style: .default) { [weak self] action in
            guard let self = self, 
                  let input = alert.textFields?.first?.text,
                  let value = Double(input) else {
                return
            }
            self.applicationDelay = value
            self.resetToolbarItems()
        }
        alert.addAction(action)
        present(alert, animated: true)
    }
    
    @objc func toggleReplay() {
        replay = !replay
        resetToolbarItems()
    }
}

extension MoleculeReplacementViewController: UITextViewDelegate {
    func textViewShouldEndEditing(_ textView: UITextView) -> Bool {
        guard textView.text.count > 0 else {
            return true
        }
        do {
            if let data = textView.text.data(using: .utf8) {
                let jsonObject = try JSONSerialization.jsonObject(with: data, options: [])
                _ = try JSONSerialization.data(withJSONObject: jsonObject, options: [.prettyPrinted, .sortedKeys])
            }
            return true
        } catch {
            let alert = UIAlertController(title: "Error", message: "\(error)", preferredStyle: .alert)
            alert.addAction(UIAlertAction(title: "Ok", style: .cancel, handler: nil))
            present(alert, animated: true, completion: nil)
            return false
        }
    }
    
    func textViewDidEndEditing(_ textView: UITextView) {
        guard textView.text.count > 0 else {
            return
        }
        do {
            if let data = textView.text.data(using: .utf8) {
                let jsonObject = try JSONSerialization.jsonObject(with: data, options: [])
                let prettyData = try JSONSerialization.data(withJSONObject: jsonObject, options: [.prettyPrinted, .sortedKeys])
                let prettyString = String.init(data: prettyData, encoding: .utf8)
                textView.text = prettyString
            }
        } catch {
            let alert = UIAlertController(title: "Error", message: "\(error)", preferredStyle: .alert)
            alert.addAction(UIAlertAction(title: "Ok", style: .cancel, handler: nil))
            present(alert, animated: true, completion: nil)
        }
    }
}