//
//  RCTCPDFView.swift
//  react-native-compdfkit-pdf
//
//  Copyright © 2014-2025 PDF Technologies, Inc. All Rights Reserved.
//
//  THIS SOURCE CODE AND ANY ACCOMPANYING DOCUMENTATION ARE PROTECTED BY INTERNATIONAL COPYRIGHT LAW
//  AND MAY NOT BE RESOLD OR REDISTRIBUTED. USAGE IS BOUND TO THE ComPDFKit LICENSE AGREEMENT.
//  UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS SUBJECT TO CIVIL AND CRIMINAL PENALTIES.
//  This notice may not be removed from this file.
//

import UIKit
import ComPDFKit_Tools
import ComPDFKit

protocol RCTCPDFViewDelegate: AnyObject {
    func cpdfViewAttached(_ cpdfView: RCTCPDFView)
    func saveDocumentChange(_ cpdfView: RCTCPDFView)
    func onPageChanged(_ cpdfView: RCTCPDFView, pageIndex: Int)
}

class RCTCPDFView: UIView, CPDFViewBaseControllerDelete {

    weak var delegate: RCTCPDFViewDelegate?

    public var pdfViewController : CPDFViewController?

    private var navigationController : CNavigationController?

    init() {
        super.init(frame: CGRect(x: 0, y: 0, width: 500, height: 400))
    }

    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    // MARK: - Private Methods

    private func createCPDFView() {
        var documentPath = document.path
        var success = false

        let homeDiectory = NSHomeDirectory()
        let bundlePath = Bundle.main.bundlePath

        if (documentPath.hasPrefix(homeDiectory) || documentPath.hasPrefix(bundlePath)) {
            let fileManager = FileManager.default
            let samplesFilePath = NSHomeDirectory().appending("/Documents/Files")
            let fileName = document.lastPathComponent
            let docsFilePath = samplesFilePath + "/" + fileName

            if !fileManager.fileExists(atPath: samplesFilePath) {
                try? FileManager.default.createDirectory(atPath: samplesFilePath, withIntermediateDirectories: true, attributes: nil)
            }

            try? FileManager.default.copyItem(atPath: document.path, toPath: docsFilePath)

            documentPath = docsFilePath
        } else {
            success = document.startAccessingSecurityScopedResource()
        }

        let jsonData = CPDFJSONDataParse(String: configuration)
        let configurations = jsonData.configuration ?? CPDFConfiguration()

        pdfViewController = CPDFViewController(filePath: documentPath, password: password, configuration: configurations)
        pdfViewController?.delegate = self
        navigationController = CNavigationController(rootViewController: pdfViewController!)
        navigationController?.view.autoresizingMask = [.flexibleWidth, .flexibleHeight]
        navigationController?.view.frame = self.frame

        navigationController?.setViewControllers([pdfViewController!], animated: true)

        addSubview(navigationController?.view ?? UIView())

        self.delegate?.cpdfViewAttached(self)

        if success {
            document.stopAccessingSecurityScopedResource()
        }
    }

    // MARK: - Public Methods

    func saveDocument(completionHandler: @escaping (Bool) -> Void) {
        if (self.pdfViewController?.pdfListView?.isEditing() == true && self.pdfViewController?.pdfListView?.isEdited() == true) {
            self.pdfViewController?.pdfListView?.commitEditing()

            if self.pdfViewController?.pdfListView?.document.isModified() == true {
                let document = self.pdfViewController?.pdfListView?.document
                let success = document?.write(to: document?.documentURL ?? URL(fileURLWithPath: ""), isSaveFontSubset: true) ?? false
                completionHandler(success)
            } else {
                completionHandler(true)
            }

        } else {
            if self.pdfViewController?.pdfListView?.document.isModified() == true {
                let document = self.pdfViewController?.pdfListView?.document
                let success = document?.write(to: document?.documentURL ?? URL(fileURLWithPath: ""), isSaveFontSubset: true) ?? false
                completionHandler(success)
            } else {
                completionHandler(true)
            }
        }
    }

    func setMargins(left : Int, top : Int, right : Int, bottom : Int) {
        if let pdfListView = self.pdfViewController?.pdfListView {
            pdfListView.pageBreakMargins = .init(top: CGFloat(top), left: CGFloat(left), bottom: CGFloat(bottom), right: CGFloat(right))
            pdfListView.layoutDocumentView()
        }
    }

    func removeAllAnnotations(completionHandler: @escaping (Bool) -> Void) {
        if let pdfListView = self.pdfViewController?.pdfListView {
            let pageCount = pdfListView.document?.pageCount ?? 0
            for i in 0..<pageCount {
                let page = pdfListView.document?.page(at: i)
                page?.removeAllAnnotations()
            }
            self.pdfViewController?.pdfListView?.setNeedsDisplayForVisiblePages()
            self.pdfViewController?.pdfListView?.updateActiveAnnotations([])
            completionHandler(true)
        } else {
            completionHandler(false)
        }
    }

    func importAnnotations(xfdfFile : URL, completionHandler: @escaping (Bool) -> Void) {
        if let pdfListView = self.pdfViewController?.pdfListView {

            let documentFolder = NSHomeDirectory().appending("/Documents/Files")
            if !FileManager.default.fileExists(atPath: documentFolder) {
                try? FileManager.default.createDirectory(at: URL(fileURLWithPath: documentFolder), withIntermediateDirectories: true, attributes: nil)
            }

            let documentPath = documentFolder + "/\(xfdfFile.lastPathComponent)"
            try? FileManager.default.copyItem(atPath: xfdfFile.path, toPath: documentPath)

            if !FileManager.default.fileExists(atPath: documentPath) {
                print("fail")
            }

            let success = pdfListView.document?.importAnnotation(fromXFDFPath: documentPath) ?? false
            if success {
                self.pdfViewController?.pdfListView?.setNeedsDisplayForVisiblePages()
            }
            completionHandler(success)
        } else {
            completionHandler(false)
        }
    }

    func exportAnnotations(completionHandler: @escaping (String) -> Void) {
        if let pdfListView = self.pdfViewController?.pdfListView {
            let fileNameWithExtension = pdfListView.document?.documentURL.lastPathComponent ?? ""
            let fileName = (fileNameWithExtension as NSString).deletingPathExtension
            let documentFolder = NSHomeDirectory().appending("/Documents/\(fileName)_xfdf.xfdf")
            let succes = pdfListView.document?.exportAnnotation(toXFDFPath: documentFolder) ?? false

            if succes {
                completionHandler(documentFolder)
            } else {
                completionHandler("")
            }
        } else {
            completionHandler("")
        }
    }

    func setDisplayPageIndex(pageIndex : Int) {
        if let pdfListView = self.pdfViewController?.pdfListView {
            pdfListView.go(toPageIndex: pageIndex, animated: false)
        }
    }

    func getCurrentPageIndex(completionHandler: @escaping (Int) -> Void) {
        if let pdfListView = self.pdfViewController?.pdfListView {
            completionHandler(pdfListView.currentPageIndex)
        } else {
            completionHandler(0)
        }
    }

    func hasChange(completionHandler: @escaping (Bool) -> Void) {
        if let pdfListView = self.pdfViewController?.pdfListView {
            let success = pdfListView.document?.isModified() ?? false
            completionHandler(success)
        } else {
            completionHandler(false)
        }
    }

    func setScale(scale : NSNumber){
        if let pdfListView = self.pdfViewController?.pdfListView {
            pdfListView.setScaleFactor(CGFloat(truncating: scale), animated: true)
        }
    }

    func getScale(completionHandler: @escaping (NSNumber) -> Void) {
        if let pdfListView = self.pdfViewController?.pdfListView {
            completionHandler(NSNumber(value: pdfListView.scaleFactor))
        } else {
            completionHandler(1.0)
        }
    }

    func setReadBackgroundColor(displayMode : NSString) {
        if let pdfListView = self.pdfViewController?.pdfListView {
            switch displayMode {
            case "light":
                pdfListView.displayMode = .normal
            case "dark":
                pdfListView.displayMode = .night
            case "sepia":
                pdfListView.displayMode = .soft
            case "reseda":
                pdfListView.displayMode = .green
            default:
                pdfListView.displayMode = .normal
            }
            pdfListView.layoutDocumentView()
        }
    }

    func getReadbackgroundColor(completionHandler: @escaping (NSString) -> Void) {
        if let pdfListView = self.pdfViewController?.pdfListView {
            let dispalyMode = pdfListView.displayMode
            switch dispalyMode {
            case .normal:
                completionHandler("#FFFFFF")
            case .night:
                completionHandler("#000000")
            case .soft:
                completionHandler("#FFFFFF")
            case .green:
                completionHandler("#FFEFBE")
            case .custom:
                completionHandler("#CDE6D0")
            @unknown default:
                completionHandler("#FFFFFF")
            }
        } else {
            completionHandler("#FFFFFF")
        }
    }

    func setFormFieldHighlight(formFieldHighlight : Bool){
        if let pdfListView = self.pdfViewController?.pdfListView {
            CPDFKitConfig.sharedInstance().setEnableFormFieldHighlight(formFieldHighlight)
            pdfListView.layoutDocumentView()
        }
    }

    func isFormFieldHighlight(completionHandler: @escaping (Bool) -> Void){
        completionHandler(CPDFKitConfig.sharedInstance().enableFormFieldHighlight())
    }

    func setLinkHighlight(linkHighlight : Bool) {
        if let pdfListView = self.pdfViewController?.pdfListView {
            CPDFKitConfig.sharedInstance().setEnableLinkFieldHighlight(linkHighlight)
            pdfListView.layoutDocumentView()
        }
    }

    func isLinkHighlight(completionHandler: @escaping (Bool) -> Void){
        completionHandler(CPDFKitConfig.sharedInstance().enableLinkFieldHighlight())
    }

    func setVerticalMode(isVerticalMode : Bool) {
        if let pdfListView = self.pdfViewController?.pdfListView {
            pdfListView.displayDirection = isVerticalMode ? .vertical : .horizontal
            pdfListView.layoutDocumentView()
        }
    }

    func isVerticalMode(completionHandler: @escaping (Bool) -> Void){
        if let pdfListView = self.pdfViewController?.pdfListView {
            completionHandler(pdfListView.displayDirection == .vertical)
        } else {
            completionHandler(true)
        }
    }

    func setContinueMode(isContinueMode : Bool) {
        if let pdfListView = self.pdfViewController?.pdfListView {
            pdfListView.displaysPageBreaks = isContinueMode
            pdfListView.layoutDocumentView()
        }
    }

    func isContinueMode(completionHandler: @escaping (Bool) -> Void){
        if let pdfListView = self.pdfViewController?.pdfListView {
            completionHandler(pdfListView.displaysPageBreaks)
        }else {
            completionHandler(true)
        }
    }

    func setDoublePageMode(isDoublePageMode : Bool) {
        if let pdfListView = self.pdfViewController?.pdfListView {
            pdfListView.displayTwoUp = isDoublePageMode
            pdfListView.displaysAsBook = false
            pdfListView.layoutDocumentView()
        }
    }

    func isDoublePageMode(completionHandler: @escaping (Bool) -> Void){
        if let pdfListView = self.pdfViewController?.pdfListView {
            completionHandler(pdfListView.displayTwoUp)
        }else {
            completionHandler(true)
        }
    }

    func setCoverPageMode(isCoverPageMode : Bool) {
        if let pdfListView = self.pdfViewController?.pdfListView {
            pdfListView.displayTwoUp = isCoverPageMode
            pdfListView.displaysAsBook = isCoverPageMode
            pdfListView.layoutDocumentView()
        }
    }

    func isCoverPageMode(completionHandler: @escaping (Bool) -> Void){
        if let pdfListView = self.pdfViewController?.pdfListView {
            completionHandler(pdfListView.displaysAsBook)
        }else {
            completionHandler(true)
        }
    }

    func setCropMode(isCropMode : Bool) {
        if let pdfListView = self.pdfViewController?.pdfListView {
            pdfListView.displayCrop = isCropMode
            pdfListView.layoutDocumentView()
        }
    }

    func isCropMode(completionHandler: @escaping (Bool) -> Void){
        if let pdfListView = self.pdfViewController?.pdfListView {
            completionHandler(pdfListView.displayCrop)
        }else {
            completionHandler(true)
        }
    }

    func getFileName(completionHandler: @escaping (String) -> Void){
        if let pdfListView = self.pdfViewController?.pdfListView {
            completionHandler(pdfListView.document.documentURL.lastPathComponent)
        }else {
            completionHandler("")
        }
    }

    func isEncrypted(completionHandler: @escaping (Bool) -> Void){
        if let pdfListView = self.pdfViewController?.pdfListView {
            completionHandler(pdfListView.document.isEncrypted)
        }else {
            completionHandler(false)
        }
    }

    func isImageDoc(completionHandler: @escaping (Bool) -> Void){
        if let pdfListView = self.pdfViewController?.pdfListView {
            completionHandler(pdfListView.document.isImageDocument())
        }else {
            completionHandler(false)
        }
    }

    func getPermissions(completionHandler: @escaping (NSNumber) -> Void) {
        if let pdfListView = self.pdfViewController?.pdfListView {
            let permissions = pdfListView.document?.permissionsStatus ?? .none
            switch permissions {
            case .none:
                completionHandler(0)
            case .user:
                completionHandler(1)
            case .owner:
                completionHandler(2)
            default:
                completionHandler(0)
            }
        }else {
            completionHandler(0)
        }
    }

    func getPageCount(completionHandler: @escaping (NSNumber) -> Void) {
        if let pdfListView = self.pdfViewController?.pdfListView {
            completionHandler(pdfListView.document.pageCount as NSNumber)
        }else {
            completionHandler(0)
        }
    }

    func checkOwnerUnlocked(completionHandler: @escaping (Bool) -> Void) {
        if let pdfListView = self.pdfViewController?.pdfListView {
            completionHandler(pdfListView.document.isCheckOwnerUnlocked())
        }else {
            completionHandler(false)
        }
    }

    func checkOwnerPassword(password : String, completionHandler: @escaping (Bool) -> Void) {
        if let pdfListView = self.pdfViewController?.pdfListView {
            completionHandler(pdfListView.document.checkOwnerPassword(password))
        }else {
            completionHandler(false)
        }
    }

    func getEncryptAlgo(completionHandler: @escaping (String) -> Void) {
        if let pdfListView = self.pdfViewController?.pdfListView {
            let encryptAlgo = pdfListView.document.encryptionLevel
            switch encryptAlgo {
            case .RC4:
                completionHandler("rc4")
            case .AES128:
                completionHandler("aes128")
            case .AES256:
                completionHandler("aes256")
            case .noEncryptAlgo:
                completionHandler("noEncryptAlgo")
            default:
                completionHandler("noEncryptAlgo")
            }
        }else {
            completionHandler("noEncryptAlgo")
        }
    }





    // MARK: - CPDFViewBaseControllerDelete

    func PDFViewBaseController(_ baseController: CPDFViewBaseController, SaveState success: Bool) {
        self.delegate?.saveDocumentChange(self)
    }

    func PDFViewBaseController(_ baseController: CPDFViewBaseController, currentPageIndex index: Int) {
        self.delegate?.onPageChanged(self, pageIndex: index)
    }

    // MARK: - RCT Methods

    private var configuration: String = ""
    @objc func setConfiguration(_ newSection: String) {
        configuration = newSection

        if (document.path.count > 1) && (configuration.count > 1) {
            createCPDFView()
        }
    }

    private var document: URL = URL(fileURLWithPath: "")
    @objc func setDocument(_ newSection: URL) {
        document = newSection

        if (document.path.count > 1) && (configuration.count > 1) {
            createCPDFView()
        }
    }

    private var password: String = ""
    @objc func setPassword(_ newSection: String) {
        password = newSection
    }

    public var onChange: RCTBubblingEventBlock?
    @objc func setOnChange(_ newSection: @escaping RCTBubblingEventBlock) {
        onChange = newSection
    }
}