//
//  KMBatchOperateBaseViewController.swift
//  PDF Reader Pro
//
//  Created by kdanmobile on 2023/10/30.
//

import Cocoa

//var kBatchQueueOperationsChanged = "kBatchQueueOperationsChanged"
private var kBatchQueueOperationsChanged = 0x000101
class KMBatchOperateBaseViewController: NSViewController, KMBatchOperateProtocol{
    var operateType: KMBatchOperationType?
    var convertType: KMConvertWithPDFType?
    var files: [KMBatchOperateFile]?
    lazy var queue: KMOperationQueue? = {
        var queue: KMOperationQueue?
        if !((self.view.window as? KMBatchWindow)?.isBatch ?? false) {
            queue = KMOperationQueue()
        } else {
            if self.operateType == .Convert {
                queue = KMConvertOperationQueue.sharedQueue
            } else if self.operateType == .Compress {
                queue = KMCompressOperationQueue.sharedQueue
            } else if self.operateType == .AddPassword {
                queue = KMAddPasswordOperationQueue.sharedQueue
            } else if self.operateType == .RemovePassword {
                queue = KMRemovePasswordOperationQueue.sharedQueue
            } else if self.operateType == .AddWatermark {
                queue = KMAddWatermarkOprationQueue.sharedQueue
            } else if self.operateType == .RemoveWatermark {
                queue = KMRemoveWatermarkOperationQueue.sharedQueue
            } else if self.operateType == .AddBackground {
                queue = KMAddBackgroundOperationQueue.sharedQueue
            } else if self.operateType == .RemoveBackground {
                queue = KMRemoveBackgroundOperationQueue.sharedQueue
            } else if self.operateType == .AddHeaderFooter {
                queue = KMAddHeaderFooterOperationQueue.sharedQueue
            } else if self.operateType == .RemoveHeaderFooter {
                queue = KMRemoveHeaderFooterQueue.sharedQueue
            } else if self.operateType == .AddBates {
                queue = KMAddBatesOperationQueue.sharedQueue
            } else if self.operateType == .RemoveBates {
                queue = KMRemoveBatesOperationQueue.sharedQueue
            }
        }
        return queue
    }()
    lazy var successFilePathURLArray: [URL]? = {
        let arr = NSMutableArray()
        return (arr as! [URL])
    }()
    var name: String = ""
    var interfaceStatus: KMBatchOperateInterfaceStatus?
    var choosePath: String = ""
    
    init(files: [KMBatchOperateFile]) {
        super.init(nibName: String(describing: type(of: self)), bundle: nil)
        self.files = (files)
    }
    
    required init?(coder: NSCoder) {
        super.init(coder: coder)
    }
    deinit {
//        queue?.removeObserver(self, forKeyPath: "operations")
    }
    override func viewDidLoad() {
        super.viewDidLoad()
        self.queue?.addObserver(self, forKeyPath: "operations", options: .new, context: &kBatchQueueOperationsChanged)
    }
    
    func operateCompleted() {
        showWindowCloseButton()
        if successFilePathURLArray!.count > 0 {
            NSWorkspace.shared.activateFileViewerSelecting(successFilePathURLArray!)
        }
        self.interfaceStatus = .PrepareProcess
    }
    func showWindowCloseButton() {
        let btn = self.view.window?.standardWindowButton(NSWindow.ButtonType.closeButton)
        btn?.isHidden = false
    }
    func beginBatchOperation() {
        for i in 0..<self.files!.count {
            let file = self.files?[i]
            file?.currentOperateInfo?.resetState()
        }
        if self.files!.count < 1 {
            NSSound.beep()
            return
        }
        
        self.fetchFileListViewController()!.reloadData()
        
        let openPanel = NSOpenPanel()
        openPanel.canChooseFiles = false
        openPanel.canChooseDirectories = true
        openPanel.canCreateDirectories = true
        openPanel.beginSheetModal(for: self.view.window!) { (result) in
            if result == NSApplication.ModalResponse.OK {
                for fileURL in openPanel.urls {
                    self.choosePath = fileURL.path
                    self.beginQueueOperation()
                }
            }
        }
    }
    func fetchFileListViewController() -> KMBatchOperateLeftViewController? {
        guard let vc = self.view.window?.contentViewController as? KMBatchOperateSplitViewController,
              let viewController = vc.splitViewItems.first?.viewController as? KMBatchOperateLeftViewController
        else {
            return nil
        }
        return viewController
    }
    func beginQueueOperation() {//业务逻辑转移到数据处理层
        // hiddenWindowCloseButtonIfNeeded()
        self.successFilePathURLArray?.removeAll()
        for i in 0..<self.files!.count {
            let file = self.files![i]
            if file.fileType == .PDF {
                if self.operateType == .Convert {
                    file.convertType = self.convertType ?? .WordAdvance
                }
                file.currentOperateInfo?.savePath = self.choosePath
                let operation = operationWithFile(file)
                operation.delegate = self
                self.queue?.addOperation(operation)
            }
        }
        if self.queue?.operations.count ?? 0 > 0 {
            self.interfaceStatus = .Processing
        }
    }
    func operationWithFile(_ file: KMBatchOperateFile) -> KMBatchOperation {
        var operation: KMBatchOperation?
        if self.operateType == .Convert {
            return KMBatchConvertOperation(file: file, convertType: self.convertType!)
        } else if self.operateType == .Compress {
            return KMCompressOperation(file: file, compressValue: 60)
        } else if self.operateType == .AddPassword {
            // handle AddPassword operation
        } else if self.operateType == .RemovePassword {
            return KMBatchRemovePasswordOperation(file: file)
        } else if self.operateType == .AddWatermark {
            // handle AddWatermark operation
        } else if self.operateType == .RemoveWatermark {
            return KMBatchRemoveWatermarkOperation(file: file)
        } else if self.operateType == .AddBackground {
            // handle AddBackground operation
        } else if self.operateType == .RemoveBackground {
            return KMBatchRemoveBackgroundOperation(file: file)
        } else if self.operateType == .AddHeaderFooter {
            // handle AddHeaderFooter operation
        } else if self.operateType == .RemoveHeaderFooter {
            return KMBatchRemoveHeaderFooterOperation(file: file)
        } else if self.operateType == .AddBates {
//            operation = KMBatchRemoveHeaderFooterOperation(file: file)
        } else if self.operateType == .RemoveBates {
            var op = KMBatchRemoveHeaderFooterOperation(file: file)
            op.isBates = true
            return op
        } else {
            
        }
        return operation ?? KMBatchOperation(file: file)
    }
    func cancelBatchOperation() {
        for i in 0..<(self.queue?.operations.count)! {
            let operation = self.queue?.operations[i]
            if !operation!.isExecuting {
                operation?.cancel()
            } else {
                // Do nothing
            }
        }
        self.interfaceStatus = .PrepareProcess
    }
    func hiddenWindowCloseButtonIfNeeded() {
        let btn = self.view.window?.standardWindowButton(NSWindow.ButtonType.closeButton)
        btn?.isHidden = true
    }
    func allPageNumbers(_ pageString: String) -> [NSNumber] {
        let array = pageString.components(separatedBy: ",")
        let pageNumbers = NSMutableArray()
        var isInvalid = false
        for s in array {
            if s == "" {
                isInvalid = true
                break
            } else {
                let pages = s.components(separatedBy: "-")
                if pages.count > 2 {
                    isInvalid = true 
                    break
                } else if pages.count == 1 {
                    let p = pages[0]
                    if p == "" || Int(p) == 0 {
                        isInvalid = true 
                        break
                    } else {
                        var isEqual = false
                        for pageNumber in pageNumbers {
                            if (pageNumber as AnyObject).intValue == Int(p) {
                                isEqual = true
                                isInvalid = true 
                                break
                            }
                        }
                        if !isEqual {
                            pageNumbers.add(NSNumber(value: Int(p)!))
                        }
                    }
                } else if pages.count == 2 {
                    let p1 = pages[0]
                    let p2 = pages[1]
                    if p1 == "" || p2 == "" || Int(p1)! >= Int(p2)! || Int(p1) == 0 {
                        isInvalid = true
                        break
                    } else {
                        var isEqual = false
                        for i in Int(p1)!...Int(p2)! {
                            for pageNumber in pageNumbers {
                                if (pageNumber as AnyObject).intValue == i {
                                    isEqual = true
                                    isInvalid = true
                                    break
                                }
                            }
                        }
                        if !isEqual {
                            for i in Int(p1)!...Int(p2)! {
                                pageNumbers.add(NSNumber(value: i))
                            }
                        }
                    }
                }
            }
        }
        return pageNumbers as! [NSNumber]
    }
    override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
        if keyPath == "operations" && context == &kBatchQueueOperationsChanged {
            if self.queue?.operations.count == 0 {
                DispatchQueue.main.async {
                    self.operateCompleted()
                }
            }
        } else {
            super.observeValue(forKeyPath: keyPath, of: object, change: change, context: context)
        }
    }
}

extension KMBatchOperateBaseViewController{
    func fileBeginOperate(_ file: KMBatchOperateFile, info: KMBatchBaseParameter) {
        DispatchQueue.main.async {
            info.status = .processing
            self.fetchFileListViewController()?.reloadFile(file)
        }
    }
    func fileOperating(_ file: KMBatchOperateFile, progress: CGFloat, info: KMBatchBaseParameter) {
        DispatchQueue.main.async {
            info.progress = Float(progress)
            self.fetchFileListViewController()?.reloadFile(file)
        }
    }
    func fileOperateSuccessed(_ file: KMBatchOperateFile, info: KMBatchBaseParameter) {
        DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + 0.3) {
            info.status = .Success
            if info.outPutPath?.count ?? 0 > 0{
                let url: URL = URL(fileURLWithPath: info.outPutPath!)
                self.successFilePathURLArray?.append(url)
            }
            self.fetchFileListViewController()?.reloadFile(file)
        }
    }
    func fileOperateFailed(_ file: KMBatchOperateFile, error: NSError, info: KMBatchBaseParameter) {
        DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + 0.3) {
            info.status = .Failed
            info.error = error
            self.fetchFileListViewController()?.reloadData()
        }
    }
    func fileOperateCanceled(_ file: KMBatchOperateFile, info: KMBatchBaseParameter) {
        DispatchQueue.main.async {
            info.status = .Waiting
            info.error = nil
            self.fetchFileListViewController()?.reloadFile(file)
        }
    }
}