//
//  KMPDFEditExtractWindow.swift
//  PDF Reader Pro
//
//  Created by tangchao on 2023/11/14.
//

import Cocoa

class KMPDFEditExtractWindow: NSWindowController {    
    @IBOutlet var cancelButton: NSButton!
    @IBOutlet var extractButton: NSButton!
    @IBOutlet var deleteExtractButton: NSButton!
    @IBOutlet var extractAsDocumentsPerPageButton: NSButton! //每页提取为单个PDF
    
    var callback: ((CPDFDocument?, KMFileAttribute?, Bool, Bool)->Void)?
    
    private var _extractPerPageFlag = false //是否按页提取标志位
    private var _selectedPagesName = ""
    private weak var _pdfDocument: CPDFDocument?
    private var _attribute: KMFileAttribute?
    
    convenience init(document: CPDFDocument, selectedPagesName pageString: String) {
        self.init(windowNibName: "KMPDFEditExtractWindow")
        
        self._selectedPagesName = pageString
        self._pdfDocument = document
        
        self._attribute = KMFileAttribute()
        self._attribute?.pageCnt = Int(document.pageCount)
        if (pageString.isEmpty == false) {
            self._selectedPagesName = pageString
            self._attribute?.bAllPage = false
            self._attribute?.pagesType = .custom
            self._attribute?.pagesString = pageString
        } else {
            self._attribute?.bAllPage = true
            self._attribute?.pagesType = .all
        }
        self._attribute?.filePath = document.documentURL.path
    }
    
    convenience init(fileURL documentPath: URL, selectedPagesName pageString: String) {
        self.init(windowNibName: "KMPDFEditExtractWindow")
        
        self._selectedPagesName = pageString
        self._pdfDocument = CPDFDocument(url: documentPath)
        
        self._attribute = KMFileAttribute()
        
        if (pageString.isEmpty == false) {
            self._selectedPagesName = pageString
            
            self._attribute?.bAllPage = false
            self._attribute?.pagesType = .custom
            self._attribute?.pagesString = pageString
        } else {
            self._attribute?.bAllPage = true
            self._attribute?.pagesType = .all
        }
        self._attribute?.filePath = documentPath.path
//        self._attribute?.pdfDocument = self._pdfDocument!
    }
    
    override func windowDidLoad() {
        super.windowDidLoad()
    
        self._extractPerPageFlag = false
        self.extractAsDocumentsPerPageButton.title = KMLocalizedString("Each page in a separate file")
        
        self.window?.title =  KMLocalizedString("Extract")
        self.cancelButton.title = KMLocalizedString("Cancel")
        self.extractButton.title = KMLocalizedString("Extract")
        self.deleteExtractButton.title = KMLocalizedString("Delete pages after extraction")
        self.deleteExtractButton.wantsLayer = true
        self.extractAsDocumentsPerPageButton.wantsLayer = true
    }
    
    @IBAction func buttonItemClicked_Cancel(_ sender: AnyObject) {
        self._pdfDocument = nil;

        guard let block = self.callback else {
            return
        }
        block(nil, nil, false, false)
    }
    
    @IBAction func buttonItemClicked_Extract(_ sender: AnyObject) {
        if let data = self._attribute?.fetchSelectPages().isEmpty, data {
            Task {
                _ = await KMAlertTool.runModel(message: String(format: "%@ %@", self._attribute?.filePath.lastPathComponent ?? "", KMLocalizedString("Invalid page range or the page number is out of range. Please try again.")))
            }
            return
        }
        
        let pageCnt = self._pdfDocument?.pageCount ?? 0
        let pages = self._attribute?.fetchSelectPages() ?? []
        if (self.deleteExtractButton.state == .on && pageCnt == pages.count) {
            Task {
                _ = await KMAlertTool.runModel(message: String(format: "%@ %@", self._attribute?.filePath.lastPathComponent ?? "", KMLocalizedString("Invalid page range or the page number is out of range. Please try again.")))
            }
            return
        }
        guard let block = self.callback else {
            return
        }
        block(self._pdfDocument, self._attribute, self._extractPerPageFlag, self.deleteExtractButton.state == .on)
    }
    
    @IBAction func buttonItemClicked_OnePDFPerPage(_ sender: AnyObject) {
        if (self.extractAsDocumentsPerPageButton.state == .on) {
            self._extractPerPageFlag = true
        } else {
            self._extractPerPageFlag = false
        }
    }

}