//
//  TerminalStatisticsH5ViewController.swift
//  GXM-CRM
//
//  Created by jsonmess on 2017/11/22.
//  Copyright © 2017年 DemoOrg. All rights reserved.
//

import SnapKit
import UIKit
@preconcurrency import WebKit
import MJRefresh
import SwiftyJSON
import Kingfisher
import KingfisherWebP
internal import Alamofire
import SwiftyUserDefaults
import RxSwift
import RxCocoa

// 页面加载状态
enum LoadingStatus: Int {
    // 初始状态
    case initial = 0
    // 加载中..
    case inLoading = 1
    // 加载完成
    case success = 2
    // 加载失败
    case faild = 3
}

enum ScriptMessageName: String, CaseIterable {
    case updateStatusBarStyle
    case openPageRouter
    case openPage
    case openWebView
    case buyInquiryItem
    case openIM
    case toast
    case dialog
    case showBigImage
    case showCamera
    case showAlbum
    case showDatePicker
    case backConfirm
    case closeWebView
}

enum WebViewError: Error {
    case downloadImage
}

extension WebViewError: LocalizedError {
    var errorDescription: String? {
        switch self {
        case .downloadImage:
            return "图片下载失败"
        }
    }
}

class FullscreenWebView: WKWebView {
    @available(iOS 11.0, *)
    override var safeAreaInsets: UIEdgeInsets {
        return .zero
    }
}

// sourcery: router="web", name="Web页面"
@objcMembers class WebViewController: BaseViewController {//}, InitRoutable {
    
    private static let uniqueProcessPool = WKProcessPool()
    
    override var isNavigationBarHidden: Bool {
//        guard let fullscreen = fullscreen, fullscreen else {
//            return false
//        }
        return fullscreen
    }
    override var preferredStatusBarStyle: UIStatusBarStyle {
        guard let style = style, style == "default" else {
            return .lightContent
        }
        return .default
    }
    override var isChangeNavigationBarStyle: Bool {
        guard let style = style, style == "lightContent" else {
            return true
        }
        return false
    }
    
    // sourcery: parameter
    private var url: String
    // sourcery: parameter
    private var isShare: Bool?
    // sourcery: parameter
    private var fullscreen: Bool = false
    // sourcery: parameter
    private var style: String?
    //
    private var flag: String = ""
    //
    private var popConfirmTitle: String = ""
    private var popConfirmContent: String = ""
    //
    private var popType: Int = 0 // 0: 不需要二次确认 1: 返回原生   2: 返回h5上一页
    
    private var operation = WebOperations()
    private let commonMessageHandler = CommonMessageHandler()
    private let commonMessageNames: [ScriptMessageName] = ScriptMessageName.allCases
    private var webViewImageCache = ImageCache(name: "WebView")
    
    var webView: WKWebView!
    private var progressView: UIProgressView!
    private let downloadImageMaxSize = 1024
    
    var canGoBack = true
    var isHome = false
    var isMounted = false
    var hasPullRefresh = true
    var isH5Pay = false

    typealias MessageHandler = (name: String, handler: WKScriptMessageHandler)
    
    var messageHandlers: [MessageHandler] = []
    
    init(url: String, isShare: Bool?, fullscreen: Bool?, style: String?) {
        self.url = url
        self.isShare = isShare
        self.fullscreen = fullscreen ?? false
        self.style = style
        super.init(nibName: nil, bundle: nil)
    }
    
    init(url: String) {
        self.url = url
        super.init(nibName: nil, bundle: nil)
    }
    
    init(url: String, style: String) {
        self.url = url
        self.style = style
        super.init(nibName: nil, bundle: nil)
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    @MainActor deinit {
        guard webView != nil else { return }
        let userContentController = webView.configuration.userContentController
        let messageNames = commonMessageNames.map { $0.rawValue }
        messageNames.forEach { userContentController.removeScriptMessageHandler(forName: $0) }
        messageHandlers.forEach { userContentController.removeScriptMessageHandler(forName: $0.name) }
        webView = nil
        
//        let dateFrom: NSDate = NSDate.init(timeIntervalSince1970: 0)
//        let websiteDataTypes = WKWebsiteDataStore.allWebsiteDataTypes()
//        WKWebsiteDataStore.default().removeData(ofTypes: websiteDataTypes , modifiedSince: dateFrom as Date) {
//            print("清空缓存完成")
//        }
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        fd_interactivePopDisabled = true
        if style == "default" {
//            setupLeftBarButtonItem(iconColor: "gray")
        }
//        setupErrorView()
        setupView()
        addObservers()
        reload()
        bindAction()
        
    }
    
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
//        setupNavigationBar(titleColor: style=="default" ? Color.rgb0E0E0E : .white,
//                           barTinColor: style=="default" ? .white : Color.mainColor)
    }
    
    override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
//        setupNavigationBar(titleColor: .white, barTinColor: Color.mainColor)
    }
    
    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
//        MTAHybrid.restart(webView)
        onPageShow()
    }
    
    override func viewDidDisappear(_ animated: Bool) {
        super.viewDidDisappear(animated)
//        MTAHybrid.stop(webView)
    }
    
    @objc func videoDidRotate() {
        self.setNeedsStatusBarAppearanceUpdate()
    }
    
    override var prefersStatusBarHidden: Bool {
        return UIApplication.shared.statusBarOrientation.isLandscape
    }
    
    private func setupView() {
        let configuration = WKWebViewConfiguration()
        let userContentController = WKUserContentController()
        
        commonMessageHandler.webViewController = self
        let messageNames = commonMessageNames.map { $0.rawValue }
        messageNames.forEach { userContentController.add(commonMessageHandler, name: $0) }
        messageHandlers.forEach { userContentController.add($0.handler, name: $0.name) }
        
        configuration.processPool = WebViewController.uniqueProcessPool
        configuration.userContentController = userContentController
        configuration.applicationNameForUserAgent = configuration.applicationNameForUserAgent?.appending("/wlwm")
        // 访问文件路径
        configuration.preferences.setValue(true, forKey: "allowFileAccessFromFileURLs")
        // 配置相册访问权限
        configuration.allowsInlineMediaPlayback = true
        configuration.mediaTypesRequiringUserActionForPlayback = .all
        configuration.allowsPictureInPictureMediaPlayback = true
        
        let mWebView = FullscreenWebView(frame: CGRect.zero, configuration: configuration)
        webView = mWebView
        mWebView.uiDelegate = self
        mWebView.navigationDelegate = self
        mWebView.allowsBackForwardNavigationGestures = true
//        mWebView.customUserAgent = userAgent?.appending("/osell")
        if #available(iOS 16.4, *) {
            mWebView.isInspectable = true
        }
        view.addSubview(mWebView)
//        mWebView.snp.makeConstraints { make in
//            make.edges.equalToSuperview()
//        }
        mWebView.layoutChain
            .top(fullscreen ? 0 : kNaviHeight)
            .edgesHorzontal()
            .bottom()
//            .bottom(kSafeBottomMargin)
        
        if #available(iOS 11.0, *) {
            mWebView.scrollView.contentInsetAdjustmentBehavior = .automatic
        }
        
        // ProgressView
        let mProgressView = UIProgressView(frame: CGRect.zero)
        progressView = mProgressView
        mProgressView.progress = 0.0
        mProgressView.progressTintColor = ThemeManager.shared.color.mainColor
        mProgressView.backgroundColor = UIColor.clear
        mProgressView.trackTintColor = UIColor.clear
        view.addSubview(mProgressView)
        mProgressView.snp.makeConstraints { maker in
            maker.trailing.leading.equalToSuperview()
            maker.top.equalToSuperview()
            maker.height.equalTo(2.0)
        }
        
    }
    
    // 创建空白页
    private func setupErrorView() {
        let errorImage = UIImage(named: "EmptyDataSet/network_error")
        let errorStatusImageView = UIImageView(image: errorImage)
        errorStatusImageView.contentMode = .scaleAspectFit
        view.addSubview(errorStatusImageView)
        
        let errorStatusLabel = UILabel()
        errorStatusLabel.text = "oapp_NetworkFailed".localizedString
        errorStatusLabel.font = UIFont.systemFont(ofSize: 13, weight: .medium)
//        errorStatusLabel.textColor = UIColor.themeTC4
        view.addSubview(errorStatusLabel)
        
        let refreshBtn = UIButton(type: .custom)
        refreshBtn.setImage(UIImage(named: "EmptyDataSet/empty_reload"), for: .normal)
        refreshBtn.addTarget(self, action: #selector(reload), for: .touchUpInside)
        view.addSubview(refreshBtn)
        
        // contraints
        errorStatusImageView.snp.makeConstraints { (maker) in
            maker.centerX.equalToSuperview()
            maker.centerY.equalToSuperview().offset(-70.0)
        }
        
        errorStatusLabel.snp.makeConstraints { (maker) in
            maker.top.equalTo(errorStatusImageView.snp.bottom).offset(15.0)
            maker.centerX.equalToSuperview()
        }
        
        refreshBtn.snp.makeConstraints { (maker) in
            maker.top.equalTo(errorStatusLabel.snp.bottom).offset(39.0)
            maker.centerX.equalToSuperview()
        }
    }
    
    // MARK: - LeftBarButtonItems
    private func setupLeftBarButtonItem(iconColor: String) {
        guard !isNavigationBarHidden else { return }
        
//        let backItem = UIBarButtonItem(image: UIImage(named: "Common/back_\(iconColor)"),
//                                       style: .plain,
//                                       target: self, action: #selector(leftBackClicked(_:)))
//        backItem.tintColor = iconColor=="white" ? .white : .black
//        backItem.tag = 1
        
        let backBtn = UIButton(frame: CGRect(x: 0, y: 0, width: 19, height: 19))
        backBtn.setImage(UIImage(named: "Common/back_\(iconColor)"), for: .normal)
        backBtn.addTarget(self, action: #selector(leftBackClicked(_:)), for: .touchUpInside)
        backBtn.tintColor = iconColor=="white" ? .white : .black
        backBtn.tag = 1
        let backItem = UIBarButtonItem(customView: backBtn)
        
        let popBtn = UIButton(frame: CGRect(x: 0, y: 0, width: 19, height: 19))
        popBtn.setImage(UIImage(named: "Common/close_black"), for: .normal)
        popBtn.addTarget(self, action: #selector(leftBackClicked(_:)), for: .touchUpInside)
        popBtn.tintColor = iconColor=="white" ? .white : .black
        popBtn.tag = 2
        
        let popItem = UIBarButtonItem(customView: popBtn)
        
//        let popItem = UIBarButtonItem(image: UIImage(named: "Common/close_black"),
//                                      style: .plain,
//                                      target: self,
//                                      action: #selector(leftBackClicked(_:)))
//        popItem.tintColor = iconColor=="white" ? .white : .black
//        popItem.tag = 2
        
        navigationItem.leftBarButtonItems = [backItem, popItem]
    }
    
    override func leftBackClicked(_ item: UIBarButtonItem) {
        if canGoBack {
            // 1.如果有缓存页，则加载上一页
            if webView.canGoBack {
                webView.goBack()
            } else {
                // 2.否则关闭
                if isPresented {
                    dismiss(animated: true, completion: nil)
                } else {
                    navigationController?.popViewController(animated: true)
                }
            }
        }
        else {
            if isH5Pay {
                NotificationCenter.default.post(name: Notification.Name("RequestPayStatus"), object: nil)
            }
            navigationController?.popViewController(animated: true)
        }
    }
    
    // MARK: bindAction
    private func bindAction() {
        
    }
    
    // MARK: Observer
    private func addObservers() {
        self.webView.rx.observeWeakly(String.self, "title").subscribe(onNext: { [weak self] (title) in
            guard let self = self else { return }
            if self.isHome {
                self.navTitle = self.webView.title ?? ""
            } else {
                self.navTitle = self.webView.title ?? ""//self.webView.title == "物联物美" ? "便民商圈" : self.webView.title ?? ""
            }
        }).disposed(by: disposeBag)
        
        self.webView.rx.observeWeakly(Double.self, "estimatedProgress").subscribe(onNext: { [weak self] _ in
            UIView.animate(withDuration: 0.5, delay: 0, options: .curveEaseInOut, animations: {
                if let progres = self?.webView.estimatedProgress {
                    self?.progressView?.progress = Float(progres)
                }
            }, completion: nil)
        }).disposed(by: disposeBag)
    }
    
    // 加载 request
    func loadRequest(_ loadUrl: URL) {
        updateShow(status: .initial)
        var request = URLRequest(url: loadUrl, cachePolicy: .useProtocolCachePolicy, timeoutInterval: 15)
        webView?.load(request)
    }
    
    // 重新加载
    @objc func reload() {
        updateShow(status: .initial)
//        WKWebsiteDataStore.default().removeData(ofTypes: WKWebsiteDataStore.allWebsiteDataTypes(),
//                                                modifiedSince: Date(timeIntervalSince1970: 0), completionHandler:{
//            debugPrint("清除web缓存")
//        })
        if webView.url != nil {
            webView.reload()
        } else if let loadUrl = URL(string: url) {
            // 重新加载初始页
            loadRequest(loadUrl)
        }
    }
    
    //UI显示加载  状态机
    private func updateShow(status: LoadingStatus) {
        switch status {
        case .initial:
            self.webView.isHidden = false
            self.progressView?.isHidden = false
            self.progressView?.progress = 0.0
        case .inLoading:
            self.webView.isHidden = false
            self.progressView?.isHidden = false
        case .success:
            self.webView.isHidden = false
            self.progressView?.isHidden = true
        case .faild:
            self.webView.isHidden = true
            self.progressView?.isHidden = true
        }
        
        switch status {
        case .initial:
            break
        case .inLoading:
            break
        case .success, .faild:
            if hasPullRefresh {
                self.webView.scrollView.mj_header?.endRefreshing()
            }
        }
    }
    
    // 显示Toast
    private func showLoading(body: Any) {
        guard let config = body as? String,
            let show = BoolType(rawValue: config) else { return }
        show.boolValue ? dl.showLoading() : dl.dismiss()
    }
    
    // 隐藏键盘
    private func hideKeyboard() {
        webView.endEditing(true)
    }
    
    // 下拉刷新header
//    private func enablePullRefresh(body: Any) {
//        guard let config = body as? String,
//            let enable = BoolType(rawValue: config) else { return }
//        if enable.boolValue {
//            let header = createRefreshHeader()
//            webView.scrollView.mj_header = header
//        } else {
//            webView.scrollView.mj_header = nil
//        }
//    }
    
    // 保存图片
//    private func saveImage(body: Any) {
//        ProgressHUD.show(inController: self)
//        let config = JSON(body)
//        guard let url = config["image"].url else { return }
//        let completion: CompletionHandler = { [weak self] (image, _, _, _) in
//            guard let self = self else { return }
//            guard let image = image else {
//                if let callback = config["callback"].string {
//                    self.jsCallback(method: callback, result: false)
//                }
//                ProgressHUD.dismiss(forController: self)
//                return
//            }
//            let selector = #selector(self.image(_:didFinishSavingWithError:context:))
//            if let callback = config["callback"].string {
//                let pointer = Unmanaged<NSString>.passRetained(callback as NSString).toOpaque()
//                let context = UnsafeMutableRawPointer(pointer)
//                UIImageWriteToSavedPhotosAlbum(image, self, selector, context)
//            } else {
//                UIImageWriteToSavedPhotosAlbum(image, self, selector, nil)
//            }
//        }
//        KingfisherManager.shared.retrieveImage(with: url,
//                                               options: KingfisherManager.shared.defaultOptions,
//                                               progressBlock: nil,
//                                               completionHandler: completion)
//    }
    
    @objc private func image(_ image: UIImage, didFinishSavingWithError error: NSError?, context: UnsafeRawPointer) {
        if let error = error {
            error.isShowErrorTips ? DLToast.showError(text: error.localizedDescription) : ()
        } else {
            DLToast.showSuccess(text: "oapp_Success".localizedString)
        }
        let method = unsafeBitCast(context, to: NSString.self) as String
        if !method.isEmpty {
            let result = error == nil
            jsCallback(method: method, result: result)
        }
        Unmanaged<NSString>.fromOpaque(context).release()
    }
    
    private func jsCallback(method: String, result: Bool) {
        let callbackName = method + "(\(result))"
        self.webView.evaluateJavaScript(callbackName, completionHandler: nil)
    }
    
    // MARK: - JS to Native
    private func jsCallback(method: String, params: String, secondParams: String="") {
        let callbackName = method + (secondParams.isEmpty ? "(\(params))" : "('\(params)', '\(secondParams)')")
        webView.evaluateJavaScript(callbackName, completionHandler: nil)
    }
    
    // MARK: Native to JS
    
    // 页面路由
    func openPageRouter(body: Any) {
        guard let body = body as? [String: Any],
              let url = body["url"] as? String else { return }
        AppRouter.push(url)
    }
    
    // 页面显示
    func onPageShow() {
        webView.evaluateJavaScript("try { window.onPageShow(); } catch (e) {}", completionHandler: nil)
    }
    
    // MAKR: - 状态栏样式
    func updateStatusBarStyle(body: Any) {
        guard let body = body as? [String: Any],
              let style = body["style"] as? String else { return }
        self.style = style
        setNeedsStatusBarAppearanceUpdate()
    }
    
    // MARK: - 打开原生页面（无参数）
    func openPage(body: Any) {
        guard let body = body as? [String: Any],
              let pageName = body["pageName"] as? String else { return }
        if let class_VC = NSClassFromString("dinoGo.\(pageName)") as? BaseViewController.Type {
            let vc = class_VC.init()
            navigationController?.pushViewController(vc, animated: true)
        }
    }
    
    // MARK: - 打开WebView
    func openWebView(body: Any) {
        guard let body = body as? [String: Any],
              let url = body["url"] as? String else { return }
        let vc = WebViewController(url: url, style: "default")
        navigationController?.pushViewController(vc, animated: true)
    }
    
    // MARK: - 弹框提示
    func dialog(body: Any) {
        guard let body = body as? [String: Any],
              let title = body["title"] as? String,
              let message = body["message"] as? String else { return }
        showAlert(title: title,
                  message: message,
                  cancelText: "")
    }
    
    // MARK: - 显示toast
    func toast(body: Any) {
        guard let body = body as? [String: Any],
              let message = body["message"] as? String,
              let type = body["type"] as? Int else { return }
        switch type { // 0 纯文字   1 成功    2 失败
        case 0:
            DLToast.show(text: message)
        case 1:
            DLToast.showSuccess(text: message)
        case 2:
            DLToast.showError(text: message)
        default:
            break
        }
    }
    
    // MARK: - 返回上一级页面 二次确认
    func backConfirm(body: Any) {
        guard let body = body as? [String: Any] else { return }
        
        if let title = body["title"] as? String {
            popConfirmTitle = title
        }
        
        if let content = body["content"] as? String {
            popConfirmContent = content
        }
        
        if let type = body["type"] as? Int {
            popType = type
        } else if let type = body["type"] as? String {
            popType = type.integer
        }
    }
    
    // MARK: - 退出webview
    func closeWebView(body: Any) {
        navigationController?.popViewController(animated: true)
    }
}

/// MARK: WKNavigationDelegate
extension WebViewController: WKNavigationDelegate {
    
    func webView(_ webView: WKWebView, didStartProvisionalNavigation navigation: WKNavigation!) {
        updateShow(status: .inLoading)
    }
    
    func webView(_ webView: WKWebView, didCommit navigation: WKNavigation!) {
        
    }
    
    func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
        updateShow(status: .success)
    }
    
    func webView(_ webView: WKWebView, didFailProvisionalNavigation navigation: WKNavigation!, withError error: Error) {
        updateShow(status: .faild)
    }
    
    func webView(_ webView: WKWebView, didFail navigation: WKNavigation!, withError error: Error) {
        updateShow(status: .faild)
    }
    
    func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {

        let actionPolicy = self.operation.checkAndBlockInternalUrlScheme(request: navigationAction.request)
        if let url = navigationAction.request.url {//, actionPolicy == .cancel {
//            navigator.open(url)
            print(url.absoluteString)
        }
        decisionHandler(actionPolicy)
        
        // 延迟0.1秒检查返回
        DispatchQueue.main.asyncAfter(deadline: .now() + 0.1, execute: {
            // 设置返回按钮
            if self.isHome {
                if webView.canGoBack {
//                    self.setupLeftBarButtonItem(iconColor: "white")
                } else {
//                    self.navigationItem.leftBarButtonItem = nil
                }
            }
        })
    }
}

// MARK: WKUIDelegate
extension WebViewController: WKUIDelegate {
    func webView(_ webView: WKWebView, runJavaScriptAlertPanelWithMessage message: String, initiatedByFrame frame: WKFrameInfo, completionHandler: @escaping () -> Void) {
        let alert = UIAlertController(title: title, message: message, preferredStyle: .alert)
        alert.addAction(UIAlertAction(title: "确定", style: .cancel, handler: { _ in
            completionHandler()
        }))
        present(alert, animated: true, completion: nil)
    }
    
    func webView(_ webView: WKWebView, runJavaScriptConfirmPanelWithMessage message: String, initiatedByFrame frame: WKFrameInfo, completionHandler: @escaping (Bool) -> Void) {
        let alert = UIAlertController(title: title, message: message, preferredStyle: .alert)
        alert.addAction(UIAlertAction(title: "确定", style: .default, handler: { _ in
            completionHandler(true)
        }))
        alert.addAction(UIAlertAction(title: "取消", style: .cancel, handler: { _ in
            completionHandler(false)
        }))
        present(alert, animated: true, completion: nil)
    }
    
    func webView(_ webView: WKWebView, runJavaScriptTextInputPanelWithPrompt prompt: String, defaultText: String?, initiatedByFrame frame: WKFrameInfo, completionHandler: @escaping (String?) -> Void) {
        let alert = UIAlertController(title: title, message: prompt, preferredStyle: .alert)
        alert.addTextField { textField in
            textField.text = defaultText
        }
        alert.addAction(UIAlertAction(title: "确定", style: .default, handler: { _ in
            let inputText = alert.textFields?.first?.text
            completionHandler(inputText)
        }))
        alert.addAction(UIAlertAction(title: "取消", style: .cancel, handler: { _ in
            completionHandler(nil)
        }))
        present(alert, animated: true, completion: nil)
    }
}

private class CommonMessageHandler: NSObject, WKScriptMessageHandler {
    weak var webViewController: WebViewController?
    
    func userContentController(_ userContentController: WKUserContentController, didReceive message: WKScriptMessage) {
        switch message.name {
        case "updateStatusBarStyle":
            webViewController?.updateStatusBarStyle(body: message.body)
        case "openPageRouter":
            webViewController?.openPageRouter(body: message.body)
        case "openPage":
            webViewController?.openPage(body: message.body)
        case "dialog":
            webViewController?.dialog(body: message.body)
        case "toast":
            webViewController?.toast(body: message.body)
        case "backConfirm":
            webViewController?.backConfirm(body: message.body)
        case "closeWebView":
            webViewController?.closeWebView(body: message.body)
        default:
            break
        }
        
    }
}

// MARK: UIDocumentInteractionControllerDelegate
extension WebViewController: UIDocumentInteractionControllerDelegate {
    
    func documentInteractionControllerViewControllerForPreview(_ controller: UIDocumentInteractionController) -> UIViewController {
        return self
    }
    
}