//
//  KMWatermarkManager.swift
//  PDF Reader Pro
//
//  Created by tangchao on 2022/12/19.
//

import Cocoa

enum KMWatermarkKey: String {
    case text = "WatermarTextKey"
    case textFontSize = "WatermarkOfTextFontSizeKey"
    case textFontName = "textFontName"
    case imagePath = "WatermarkOfImagePathKey"
    case rotate = "WatermarkOfRotationKey"
    case opacity = "WatermarkOfOpacityKey"
    case scale = "WatermarkOfScaleKey"
    case verticalMode = "WatermarkOfVerticalModeKey"
    case verticalSpace = "WatermarkOfVerticalSpaceKey"
    case horizontalMode = "WatermarkOfHorizontalModeKey"
    case horizontalSpace = "WatermarkOfHorizontalSpaceKey"
    case isFront = "WatermarkOfIsFrontKey"
    case red = "WatermarkOfRedKey"
    case green = "WatermarkOfGreenKey"
    case blue = "WatermarkOfBlueKey"
    case createDate = "WatermarkOfCreatTemplateDateKey"
    case pageRangeType = "WatermarkOfPageRangeTypeKey"
    case pageRangeString = "WatermarkOfPageStringKey"
    case tileVerticalSpace = "WatermarkTileVerticalSpaceKey"
    case tileHorizontalSpace = "WatermarkTileHorizontalSpaceKey"
    case isTile = "WatermarkOfIsTileKey"
    case lastAddData = "kAddLastWatermarkDataKey1"
    case id = "kWatermarkIDKey"
}

class KMWatermarkManager: NSObject {

    let watermarkFolderPath = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.applicationSupportDirectory, FileManager.SearchPathDomainMask.userDomainMask, true).last?.stringByAppendingPathComponent(Bundle.main.bundleIdentifier!).stringByAppendingPathComponent("watermark")
    let watermarkPlistPath = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.applicationSupportDirectory, FileManager.SearchPathDomainMask.userDomainMask, true).last?.stringByAppendingPathComponent(Bundle.main.bundleIdentifier!).stringByAppendingPathComponent("watermark").stringByAppendingPathComponent("watermark.plist")
    
    static let defaultManager = KMWatermarkManager()
    
    var watermarks: Array<KMWatermarkModel> = []
    
    override init() {
        super.init()
        if (FileManager.default.fileExists(atPath: watermarkPlistPath!)) {
            let dataDict = NSDictionary(contentsOfFile: watermarkPlistPath!)
            var deleteKeys: Array<String> = []
            for keyIndex in 0 ..< (dataDict?.allKeys.count ?? 0) {
                let key: String = dataDict?.allKeys[keyIndex] as! String
                let watermarkDict: NSDictionary = dataDict?.object(forKey: key) as! NSDictionary
                
                let model = parseDictionary(dict: watermarkDict)
                /// 赋值tag
                model.tag = key
                let isFile: Bool = (watermarkDict.object(forKey: KMWatermarkKey.imagePath.rawValue) != nil)
                if (isFile) {
                    if (model.image == nil) {
                        deleteKeys.append(key)
                    } else {
                        self.watermarks.append(model)
                    }
                } else {
                    self.watermarks.append(model)
                }
            }
            
            /// 根据id进行排序(升序)
            self.watermarks.sort(){$0.watermarkID > $1.watermarkID}
            
            if (deleteKeys.count > 0) {
                var newDict: NSMutableDictionary = NSMutableDictionary(dictionary: dataDict!)
                for key in deleteKeys {
                    newDict.removeObject(forKey: key)
                }
                newDict.write(toFile: watermarkPlistPath!, atomically: true)
            }
        }
    }
    
    func addWatermark(watermark: KMWatermarkModel) -> Bool {
        if (!FileManager.default.fileExists(atPath: watermarkFolderPath!)) {
//            let create = try?FileManager.default.createDirectory(atPath: watermarkFolderPath!, withIntermediateDirectories: false)
            let create: ()? = try?FileManager.default.createDirectory(atPath: watermarkFolderPath!, withIntermediateDirectories: true, attributes: nil)
            if (create == nil) {
                return false
            }
        }
        
        if (!FileManager.default.fileExists(atPath: watermarkPlistPath!)) {
            let create = try?FileManager.default.createFile(atPath: watermarkPlistPath!, contents: nil)
            if (create == nil) {
                return false
            }
        }
        
        let dict = NSDictionary(contentsOfFile: watermarkPlistPath!)
        var newDict:NSMutableDictionary!
        if (dict != nil) {
            newDict = NSMutableDictionary(dictionary: dict!)
        } else {
            newDict = NSMutableDictionary()
        }
        
        let watermarkDict = self.parseModel(model: watermark)
        if (watermarkDict.isEmpty) {
            let alert = NSAlert()
            alert.alertStyle = .critical
            alert.messageText = NSLocalizedString("文件\(watermark.imagePath.lastPathComponent)已损坏", comment: "")
            alert.runModal()
            return false
        }
        
        let tag = tagString()
        newDict.addEntries(from: [tag : watermarkDict])
        watermark.tag = tag
        let result = newDict.write(toFile: watermarkPlistPath!, atomically: true)
        if (result) {
            if (self.watermarks.count < 1) {
                self.watermarks.append(watermark)
            } else {
                self.watermarks.insert(watermark, at: 0)
            }
        }
        
        return result
    }
    
    func updateWatermark(watermark: KMWatermarkModel) -> Bool {
        if (!FileManager.default.fileExists(atPath: watermarkFolderPath!)) {
            let create: ()? = try?FileManager.default.createDirectory(atPath: watermarkFolderPath!, withIntermediateDirectories: false)
            if (create == nil) {
                return false
            }
        }
        
        if (!FileManager.default.fileExists(atPath: watermarkPlistPath!)) {
            let create = try?FileManager.default.createFile(atPath: watermarkPlistPath!, contents: nil)
            if (create == nil) {
                return false
            }
        }
        
        var flagModel: KMWatermarkModel!
        for model in self.watermarks {
            if (model.tag == watermark.tag) {
                flagModel = model
                break
            }
        }
        
        if (flagModel == nil) {
            return false
        }
        
        let dict = NSDictionary(contentsOfFile: watermarkPlistPath!)
        var newDict:NSMutableDictionary!
        if (dict != nil) {
            newDict = NSMutableDictionary(dictionary: dict!)
        } else {
            newDict = NSMutableDictionary()
        }
        
        let watermarkDict = self.parseModel(model: watermark)
        if (watermarkDict.isEmpty) {
            let alert = NSAlert()
            alert.alertStyle = .critical
            alert.messageText = NSLocalizedString("文件\(watermark.imagePath.lastPathComponent)已损坏", comment: "")
            alert.runModal()
            return false
        }
        
        newDict.setObject(watermarkDict, forKey: flagModel.tag as NSCopying)
        let result = newDict.write(toFile: watermarkPlistPath!, atomically: true)
        if (result) {
            let index = self.watermarks.index(of: flagModel)
            self.watermarks[index!] = watermark
        }
        
        return result
    }
    
    func removeWatermark(watermark: KMWatermarkModel) -> Bool {
        if (watermark == nil) {
            return false
        }
        
        if (watermark.tag == nil) {
            return false
        }
        
        if (!FileManager.default.fileExists(atPath: watermarkPlistPath!)) {
            return false
        }
        
        let key: String = watermark.tag
        
        let dictionary = NSDictionary(contentsOfFile: watermarkPlistPath!)
        var newDictionary: NSMutableDictionary!
        if (dictionary != nil) {
            newDictionary = NSMutableDictionary(dictionary: dictionary!)
        } else {
            newDictionary = NSMutableDictionary()
        }
        newDictionary.removeObject(forKey: key)
        
        let result = newDictionary.write(toFile: watermarkPlistPath!, atomically: true)
        if (result) {
            if (watermark.text == nil || watermark.text.isEmpty) {
                let filePath: String = watermark.imagePath
                try?FileManager.default.removeItem(atPath: filePath)
            }
            
            if (self.watermarks.contains(watermark)) {
                self.watermarks.removeObject(watermark)
            }
        }
        return result
    }
    
    func removeAllWatermark() -> Bool {
        if (!FileManager.default.fileExists(atPath: watermarkPlistPath!)) {
            return false
        }
        
        let dictionary = NSDictionary(contentsOfFile: watermarkPlistPath!)
        var newDictionary: NSMutableDictionary!
        if (dictionary != nil) {
            newDictionary = NSMutableDictionary(dictionary: dictionary!)
        } else {
            newDictionary = NSMutableDictionary()
        }
        
        newDictionary.removeAllObjects()
        
        let result = newDictionary.write(toFile: watermarkPlistPath!, atomically: true)
        if (result) {
            self.watermarks.removeAll()
        }
        
        return result
    }
    
    func removeAllTextWatermarks() -> Bool {
        if (!FileManager.default.fileExists(atPath: watermarkPlistPath!)) {
            return false
        }
        
        let dictionary = NSDictionary(contentsOfFile: watermarkPlistPath!)
        var newDictionary: NSMutableDictionary!
        if (dictionary != nil) {
            newDictionary = NSMutableDictionary(dictionary: dictionary!)
        } else {
            newDictionary = NSMutableDictionary()
        }
        
        let count = self.watermarks.count-1
        var deleteArray: Array<KMWatermarkModel> = []
        for i in 0 ... count {
            let model = self.watermarks[i]
            if (model.text != nil && !model.text.isEmpty) {
                newDictionary.removeObject(forKey: model.tag as Any)
                deleteArray.append(model)
            }
        }
        
        let result = newDictionary.write(toFile: watermarkPlistPath!, atomically: true)
        if (result) {
            for model in deleteArray {
                self.watermarks.removeObject(model)
            }
        }
        
        return result
    }
    
    func removeAllFileWatermarks() -> Bool {
        if (!FileManager.default.fileExists(atPath: watermarkPlistPath!)) {
            return false
        }
        
        let dictionary = NSDictionary(contentsOfFile: watermarkPlistPath!)
        var newDictionary: NSMutableDictionary!
        if (dictionary != nil) {
            newDictionary = NSMutableDictionary(dictionary: dictionary!)
        } else {
            newDictionary = NSMutableDictionary()
        }
        
        let count = self.watermarks.count-1
        var deleteArray: Array<KMWatermarkModel> = []
        for i in 0 ... count {
            let model = self.watermarks[i]
            if (model.image != nil) {
                newDictionary.removeObject(forKey: model.tag as Any)
                deleteArray.append(model)
            }
        }
        
        let result = newDictionary.write(toFile: watermarkPlistPath!, atomically: true)
        if (result) {
            for model in deleteArray {
                self.watermarks.removeObject(model)
            }
        }
        
        return result
    }
    
    private func parseModel(model: KMWatermarkModel) -> Dictionary<String, Any> {
        let tag = tagString()
        let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = "yy-MM-dd HH:mm:ss"
        let timeString = dateFormatter.string(from: Date())
        model.creatTemplateDate = timeString
        
        var dict: [String : Any] = [:]
        if (!model.text.isEmpty) {
            dict[KMWatermarkKey.text.rawValue] = model.text
            dict[KMWatermarkKey.textFontSize.rawValue] = model.getTextFontSize()
            dict[KMWatermarkKey.textFontName.rawValue] = model.getTextFontName()
        } else {
            if (!FileManager.default.fileExists(atPath: watermarkFolderPath!)) {
                try?FileManager.default.createDirectory(atPath: watermarkFolderPath!, withIntermediateDirectories: false)
            }
            
            let path = watermarkFolderPath?.stringByAppendingPathComponent("\(tag).png")
            let image = model.image
            let data = image?.tiffRepresentation
            let imageRep = NSBitmapImageRep(data: data!)
            imageRep?.size = image!.size
            
            var imageData: Data!
            let pathExtension = model.imagePath.components(separatedBy: ".").last
            if (pathExtension?.lowercased() == "png") {
                imageData = imageRep?.representation(using: NSBitmapImageRep.FileType.png, properties: [:])
            } else {
                imageData = imageRep?.representation(using: NSBitmapImageRep.FileType.jpeg, properties: [:])
            }
            
            do {
                try imageData.write(to: URL(fileURLWithPath: path!))
                dict[KMWatermarkKey.imagePath.rawValue] = path?.lastPathComponent
            }
            catch {
                KMPrint("Failed to write to disk.")
                return [:]
            }
        }
        
        var red: CGFloat = 0.0
        var green: CGFloat = 0.0
        var blue: CGFloat = 0.0
        model.getTextColor().usingColorSpaceName(NSColorSpaceName.calibratedRGB)?.getRed(&red, green: &green, blue: &blue, alpha: nil)
        dict[KMWatermarkKey.isFront.rawValue] = model.isFront
        dict[KMWatermarkKey.scale.rawValue] = model.scale
        dict[KMWatermarkKey.opacity.rawValue] = model.opacity
        dict[KMWatermarkKey.rotate.rawValue] = model.rotation
        dict[KMWatermarkKey.verticalMode.rawValue] = model.verticalMode
        dict[KMWatermarkKey.verticalSpace.rawValue] = model.verticalSpace
        dict[KMWatermarkKey.horizontalMode.rawValue] = model.horizontalMode
        dict[KMWatermarkKey.horizontalSpace.rawValue] = model.horizontalSpace
        dict[KMWatermarkKey.red.rawValue] = red
        dict[KMWatermarkKey.green.rawValue] = green
        dict[KMWatermarkKey.blue.rawValue] = blue
        dict[KMWatermarkKey.isTile.rawValue] = model.isTilePage
        dict[KMWatermarkKey.tileVerticalSpace.rawValue] = model.tileVerticalSpace
        dict[KMWatermarkKey.tileHorizontalSpace.rawValue] = model.tileHorizontalSpace
        dict[KMWatermarkKey.pageRangeType.rawValue] = model.pageRangeType.rawValue
        dict[KMWatermarkKey.pageRangeString.rawValue] = model.pagesString
        
        dict[KMWatermarkKey.createDate.rawValue] = model.creatTemplateDate
        dict[KMWatermarkKey.id.rawValue] = model.watermarkID
        
        return dict
    }
    
    private func parseDictionary(dict: NSDictionary) -> KMWatermarkModel {
        let model = KMWatermarkModel()
        
        let isText: Bool = (dict.object(forKey: KMWatermarkKey.text.rawValue) != nil)
        let isFile: Bool = (dict.object(forKey: KMWatermarkKey.imagePath.rawValue) != nil)
        
        if (isFile) {
            let path = watermarkFolderPath?.stringByAppendingPathComponent(dict.object(forKey: KMWatermarkKey.imagePath.rawValue) as! String)
            if (FileManager.default.fileExists(atPath: path!)) {
                model.image = NSImage(contentsOfFile: path!)
                model.imagePath = path ?? ""
            } else {
                model.image = nil
            }
        } else if (isText) {
            model.text = (dict.object(forKey: KMWatermarkKey.text.rawValue) as! String)
            let fontSize: CGFloat = dict.object(forKey: KMWatermarkKey.textFontSize.rawValue) as! CGFloat
//            let fontName: String = dict.object(forKey: KMWatermarkKey.textFontName.rawValue) as! String
            model.textFont = .font(name: "Helvetica", size: fontSize)
        }
        
        model.scale = (dict.object(forKey: KMWatermarkKey.scale.rawValue) as? CGFloat) ?? 1
        model.rotation = dict.object(forKey: KMWatermarkKey.rotate.rawValue) as? CGFloat ?? 0
        model.opacity = (dict.object(forKey: KMWatermarkKey.opacity.rawValue) as? CGFloat) ?? 1
        model.verticalMode = (dict.object(forKey: KMWatermarkKey.verticalMode.rawValue) as? Int) ?? 0
        model.verticalSpace = dict.object(forKey: KMWatermarkKey.verticalSpace.rawValue) as? CGFloat ?? 0
        model.horizontalMode = (dict.object(forKey: KMWatermarkKey.horizontalMode.rawValue) as? Int) ?? 0
        model.horizontalSpace = dict.object(forKey: KMWatermarkKey.horizontalSpace.rawValue) as? CGFloat ?? 0
        let red: CGFloat = dict.object(forKey: KMWatermarkKey.red.rawValue) as? CGFloat ?? 0
        let green: CGFloat = dict.object(forKey: KMWatermarkKey.green.rawValue) as? CGFloat ?? 0
        let blue: CGFloat = dict.object(forKey: KMWatermarkKey.blue.rawValue) as? CGFloat ?? 0
        model.textColor = .color(red: red, green: green, blue: blue, alpha: 1.0)
        model.isFront = (dict.object(forKey: KMWatermarkKey.isFront.rawValue) as? Bool) ?? false
        model.pageRangeType = KMWatermarkeModelPageRangeType.init(rawValue: (dict.object(forKey: KMWatermarkKey.pageRangeType.rawValue) as? Int) ?? 0)!
        model.pagesString = (dict.object(forKey: KMWatermarkKey.pageRangeString.rawValue) as? String ?? "")
        model.isTilePage = (dict.object(forKey: KMWatermarkKey.isTile.rawValue) as? Bool) ?? false
        model.tileHorizontalSpace = (dict.object(forKey: KMWatermarkKey.tileHorizontalSpace.rawValue) as? CGFloat) ?? 0
        model.tileVerticalSpace = (dict.object(forKey: KMWatermarkKey.tileVerticalSpace.rawValue) as? CGFloat) ?? 0
        model.watermarkID = (dict.object(forKey: KMWatermarkKey.id.rawValue) as? String) ?? ""
        model.creatTemplateDate = (dict.object(forKey: KMWatermarkKey.createDate.rawValue) as? String) ?? ""
        
        return model
    }
    
    func fetchAvailableName() -> String {
        var availableIndex: Int = 0
        let watermark = "Watermark"
        for model in self.watermarks {
            let watermarkID = model.watermarkID
            if (watermarkID.hasPrefix(watermark)) {
                let indexString: String = (watermarkID.components(separatedBy: watermark).last ?? "0")
                let index: Int = Int(indexString) ?? 0
                if (index >= availableIndex) {
                    availableIndex = index + 1
                }
            }
        }
        
        return "\(watermark)\(availableIndex)"
    }
    
    /**
        Private Methods
     */
    
    private func tagString() -> String {
        var result: String = ""
        
        let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = "yyMMddHHmmss"
        result.append(dateFormatter.string(from: Date()))
        result = result.appendingFormat("%04d", arc4random()%10000)
        
        return result
    }

}