//
//  KMURLToPDFWindowController.swift
//  PDF Reader Pro
//
//  Created by wanjun on 2023/1/29.
//

import Cocoa

let kUrlToPDFFolderPath = (try? FileManager.default.url(for: .applicationSupportDirectory, in: .userDomainMask, appropriateFor: nil, create: true).appendingPathComponent(Bundle.main.bundleIdentifier ?? "").appendingPathComponent("WebPage"))?.path ?? ""


typealias KMURLToPDFWindowControllerComplete = (_ filePath: String) -> Void
class KMURLToPDFWindowController: NSWindowController, NSTextFieldDelegate {
    @IBOutlet var urlBtn: NSButton!
    @IBOutlet var localHtmlBtn: NSButton!
    @IBOutlet var outputBackView: NSView!
    @IBOutlet var outputText: NSTextField!
    @IBOutlet var outputButton: NSButton!
    @IBOutlet var pageSizeComboBox: NSComboBox!
    @IBOutlet var pageViewLabel: NSTextField!
    @IBOutlet var pageSizeLabel: NSTextField!
    @IBOutlet var pageGapLabel: NSTextField!
    @IBOutlet var pageGapTextField: NSTextField!
    @IBOutlet var pagesGapStepper: NSStepper!
    @IBOutlet var btnConvert: NSButton!
    @IBOutlet var btnCancel: NSButton!
    @IBOutlet var urlTextField: NSTextField!
    
    var filePath: String?
    var posterMaskView: KMBookletMaskView?
    var gap: CGFloat = 0
    var pageSize: CGSize = NSMakeSize(298, 420)
    
    var handler: KMURLToPDFWindowControllerComplete?
    var beginWindow: NSWindow?

    override init(window: NSWindow?) {
        super.init(window: window)
    }

    required init?(coder: NSCoder) {
        super.init(coder: coder)
    }

    override func windowDidLoad() {
        super.windowDidLoad()

        window?.title = NSLocalizedString("Web Page To PDF", comment: "")
        
        pageViewLabel.stringValue = NSLocalizedString("Page View", comment: "")
        pageSizeLabel.stringValue = NSLocalizedString("Page size:", comment: "")
        pageGapLabel.stringValue = "\(NSLocalizedString("Spacing", comment: "")):"
        
        urlBtn.title = NSLocalizedString("URL", comment: "")
        localHtmlBtn.title = NSLocalizedString("File", comment: "")
        btnConvert.title = NSLocalizedString("Save as PDF", comment: "")
        btnCancel.title = NSLocalizedString("Cancel", comment: "")
        outputButton.title = NSLocalizedString("Choose...", comment: "")
        
        outputBackView.wantsLayer = true
        outputBackView.layer?.borderWidth = 0.8
        outputBackView.layer?.borderColor = NSColor(red: 177.0/255, green: 178.0/255, blue: 177.0/255, alpha: 1).cgColor
        urlTextField.placeholderString = "https://www.pdfreaderpro.com"
        urlTextField.delegate = self
        outputText.isEditable = false

        pageSizeComboBox.addItems(withObjectValues: [
            NSLocalizedString("Automatically Resize", comment: "Menu item title"),
            "4A0 1682 × 2378 mm",
            "2A0 1189 × 1682 mm",
            "A0 841 × 1189 mm",
            "A1 594 × 841 mm",
            "A2 420 × 594 mm",
            "A3 297 × 420 mm",
            "A4 210 × 297 mm",
            "A5 148 × 210 mm",
            "A6 105 × 148 mm",
            "A7 74 × 105 mm",
            "A8 52 × 74 mm",
            "A9 37 × 52 mm",
            "A10 26 × 37 mm"
        ])
        pageSizeComboBox.selectItem(at: 0)
        pageSizeComboBox.isEditable = false

        pageSize = NSMakeSize(298, 420)
        gap = 0

        pagesGapStepper.stringValue = "0"
        pagesGapStepper.isEnabled = false
        pageGapTextField.isEnabled = false

        if urlBtn.state == .on {
            if urlTextField.stringValue.count > 0 {
                btnConvert.isEnabled = true
            } else {
                btnConvert.isEnabled = false
            }
        } else {
            if outputText.stringValue.count > 0 {
                btnConvert.isEnabled = true
            } else {
                btnConvert.isEnabled = false
            }
        }

        outputText.placeholderString = "\(NSLocalizedString("Select a File", comment: "")) (.html, .webarchive)"
        outputButton.isEnabled = false
    }

    func isUrl(_ urlString: String?) -> Bool {
        guard let urlString = urlString else { return false }
        
        // 实现方法有问题，暂不使用
        var url: String
        if urlString.count > 4, urlString.prefix(4) == "www." {
            url = "http://\(urlString)"
        } else {
            url = urlString
        }
        let urlRegex = "\\bhttps?://[a-zA-Z0-9\\-.]+(?::(\\d+))?(?:(?:/[a-zA-Z0-9\\-._?,'+\\&%$=~*!():@\\\\]*)+)?"
        let urlTest = NSPredicate(format: "SELF MATCHES %@", urlRegex)
        return urlTest.evaluate(with: url)
    }

    func beginSheetModalForWindow(_ window: NSWindow, completionHandler handler: ((String) -> Void)?) {
        self.handler = handler
        self.beginWindow = window
        self.beginWindow?.beginSheet(self.window!) { response in
            self.handler?(self.filePath ?? "")
        }
    }

    @IBAction func buttonItemClicked_Cancel(_ sender: NSButton) {
        self.beginWindow?.endSheet(self.window!)
        self.window?.orderOut(self)
    }

    func urlValueEncode(_ str: String) -> String? {
        let allowedCharacterSet = CharacterSet(charactersIn: "!*'();:@&=+$,?%#[]{}").inverted
        return str.addingPercentEncoding(withAllowedCharacters: allowedCharacterSet)
    }


    @IBAction func buttonItemClicked_Start(_ sender: NSButton) {
        if !FileManager.default.fileExists(atPath: kUrlToPDFFolderPath) {
            try? FileManager.default.createDirectory(atPath: kUrlToPDFFolderPath, withIntermediateDirectories: false, attributes: nil)
        }

        var url: URL?
        var fileName: String?
        if urlBtn.state == .on {
            let urlString = urlTextField.stringValue
            var tUrl = URL(string: urlString)
            if tUrl?.scheme?.count ?? 0 < 1 {
                tUrl = URL(string: "http://\(urlString)")
            }
            url = tUrl
        } else {
            url = URL(fileURLWithPath: outputText.stringValue)
            fileName = outputText.stringValue.deletingPathExtension.lastPathComponent
        }

        let string = pageGapTextField.stringValue
        let unitScale: CGFloat = (595.0 / 21.0) * 2.54

        if string.stringToCGFloat() <= 0 {
            pageGapTextField.stringValue = "0"
        } else if string.stringToCGFloat() * unitScale > pageSize.width / 2 {
            let maxF = pageSize.width / (string.stringToCGFloat() * 2)
            pageGapTextField.stringValue = "\(maxF)"
        }
        
        gap = formatFloat(Float(string.stringToCGFloat() * unitScale)).stringToCGFloat()

        if let url = url {
            showWaitting()
            let convert = KMConvertURLToPDF.shareInstance()
            convert.fileName = fileName ?? ""
            convert.convertUrl(toPDF: [url], toPath: kUrlToPDFFolderPath, pageSize: pageSize, gap: gap, progress: { value in
                // Progress update
            }, completionHandler: { successArray, failArray in
                self.hideWaitting()
                if failArray.isEmpty {
                    if let filePath = successArray.first as? String, FileManager.default.fileExists(atPath: filePath) {
                        self.filePath = filePath
                        NSApp.endSheet(self.window!, returnCode: sender.tag)
                        self.window?.orderOut(self)
                    }
                } else {
                    let alert = NSAlert()
                    alert.alertStyle = .critical
                    alert.informativeText = NSLocalizedString("Conversion Failed", comment: "")
                    alert.messageText = ""
                    alert.addButton(withTitle: NSLocalizedString("OK", comment: ""))
                    alert.runModal()
                }
            })
        }
    }

    @IBAction func buttonItemClick_Add(_ sender: Any) {
        urlBtn.state = .off
        localHtmlBtn.state = .on
        urlTextField.isEditable = false
        urlTextField.stringValue = ""
        btnConvert.isEnabled = false

        let panel = NSOpenPanel()
        panel.canChooseFiles = true
        panel.canChooseDirectories = false
        panel.allowsMultipleSelection = false
        panel.allowedFileTypes = ["HTML", "html", "webarchive", "htm"]
        panel.beginSheetModal(for: window!) { response in
            if response == .OK {
                self.outputText.stringValue = panel.url?.path ?? ""
                self.btnConvert.isEnabled = true
            }
        }
    }

    @IBAction func buttonItemClick_ChangeType(_ sender: NSButton) {
        if urlBtn.state == .on {
            urlTextField.isEditable = true
            urlTextField.becomeFirstResponder()
            outputText.stringValue = ""
            outputButton.isEnabled = false

            if urlTextField.stringValue.count > 0 {
                btnConvert.isEnabled = true
            } else {
                btnConvert.isEnabled = false
            }
        } else {
            urlTextField.isEditable = false
            urlTextField.stringValue = ""
            outputButton.isEnabled = true

            if outputText.stringValue.count > 0 {
                btnConvert.isEnabled = true
            } else {
                btnConvert.isEnabled = false
            }
        }
    }

    @IBAction func comboBoxItemClick_PageSize(_ sender: NSComboBox) {
        switch sender.indexOfSelectedItem {
        case 0:
            pageSize = NSMakeSize(298, 420)
        case 1:
            pageSize = CGSize(width: 4760, height: 6736)
        case 2:
            pageSize = CGSize(width: 3368, height: 4760)
        case 3:
            pageSize = CGSize(width: 2380, height: 3368)
        case 4:
            pageSize = CGSize(width: 1684, height: 2380)
        case 5:
            pageSize = CGSize(width: 1190, height: 1684)
        case 6:
            pageSize = CGSize(width: 842, height: 1190)
        case 7:
            pageSize = CGSize(width: 595, height: 842)
        case 8:
            pageSize = CGSize(width: 420, height: 595)
        case 9:
            pageSize = CGSize(width: 297, height: 420)
        default:
            pageSize = CGSize(width: 210, height: 297)
        }
        
        if sender.indexOfSelectedItem != 0 {
            pagesGapStepper.stringValue = "0"
            pageGapTextField.stringValue = "0"
            pageGapTextField.isEnabled = true
            pagesGapStepper.isEnabled = true
        } else {
            pagesGapStepper.stringValue = "0"
            pageGapTextField.stringValue = ""
            pageGapTextField.isEnabled = false
            pagesGapStepper.isEnabled = false
        }
    }

    @IBAction func stepperItemClick_Gap(_ sender: NSStepper) {
        let unitScale: CGFloat = (595.0 / 21.0) * 2.54
        pageGapTextField.stringValue = String(format: "%.2f", pagesGapStepper.floatValue)
        gap = formatFloat(pagesGapStepper.floatValue * Float(unitScale)).stringToCGFloat()
    }

    func controlTextDidEndEditing(_ obj: Notification) {
        if let object = obj.object as? NSTextField, object == pageGapTextField {
            let unitScale: CGFloat = (595.0 / 21.0) * 2.54
            if object.stringValue.stringToCGFloat() <= 0 {
                pageGapTextField.stringValue = "0"
            } else if object.stringValue.stringToCGFloat() * unitScale > pageSize.width / 2 {
                let maxF = pageSize.width / (object.stringValue.stringToCGFloat() * 2)
                pageGapTextField.stringValue = "\(maxF)"
            }
            gap = formatFloat(Float(object.stringValue.stringToCGFloat() * unitScale)).stringToCGFloat()
            pagesGapStepper.floatValue = Float(object.stringValue.stringToCGFloat())
        }
    }

    func controlTextDidChange(_ notification: Notification) {
        if urlBtn.state == .on {
            if urlTextField.stringValue.count > 0 {
                btnConvert.isEnabled = true
            } else {
                btnConvert.isEnabled = false
            }
        } else {
            if outputText.stringValue.count > 0 {
                btnConvert.isEnabled = true
            } else {
                btnConvert.isEnabled = false
            }
        }
    }

    func formatFloat(_ f: Float) -> String {
        if f.truncatingRemainder(dividingBy: 1) == 0 {
            return String(format: "%.0f", f)
        } else if (f * 10).truncatingRemainder(dividingBy: 1) == 0 {
            return String(format: "%.1f", f)
        } else {
            return String(format: "%.2f", f)
        }
    }

    func showWaitting() {
        if posterMaskView == nil {
            posterMaskView = KMBookletMaskView(frame: NSMakeRect(0, 0, window?.frame.size.width ?? 0, window?.frame.size.height ?? 0))
        }
        window?.contentView?.addSubview(posterMaskView!)
    }

    func hideWaitting() {
        posterMaskView?.removeFromSuperview()
    }
}