//
//  CompareViewController.swift
//  KdanAuto
//
//  Created by 朱东勇 on 2023/2/2.
//

import Foundation
import AppKit
import PDFKit

class StringCompareViewController: NSViewController, NSTableViewDataSource, NSTableViewDelegate, NSPopoverDelegate {
    
    @IBOutlet var listView : NSTableView!
    
    @IBOutlet var filterBtn : NSButton!
    @IBOutlet var closeBtn : NSButton!
    
    @IBOutlet var progressIndicator : NSProgressIndicator!
    
    var _files : NSArray!
    var _showFiles : NSMutableArray!
    var _popover: NSPopover!
    
    static var sharedSCViewController : StringCompareViewController? = nil
    class func shared() -> StringCompareViewController {
        if nil == sharedSCViewController {
            var objects : NSArray!
            
            Bundle.main.loadNibNamed("StringCompareViewController", owner: nil, topLevelObjects: &objects)
            
            for tView in objects {
                if let tv = tView as? StringCompareViewController {
                    sharedSCViewController = tv
                }
            }
        }
        
        return sharedSCViewController!
    }
    
    override func viewDidLoad() {
        self.listView.register(NSNib.init(nibNamed: NSNib.Name.init(NSString(string: "StringCompareCellView")),
                                          bundle: Bundle.main), forIdentifier: NSUserInterfaceItemIdentifier.init("StringCompareCellView"))
    }
    
    // IBAction
    @IBAction func filterSimilarItemAction(_ sender:NSButton) {
        self.setFiles(_files);
    }
    
    @IBAction func exportAction(_ sender:NSButton) {
        if (_files.count == 0) {
            let alert = NSAlert.init()
            alert.messageText = "无测试对比项导出";
            alert.runModal();
            
            return
        }else if (_showFiles.count == 0) {
            let alert = NSAlert.init()
            alert.messageText = "所有对比项均无差异";
            alert.runModal();
            
            return
        }
        
        let savePanel = NSSavePanel.init();
        let checkBox = NSButton(checkboxWithTitle: "过滤无差异项", target: self, action: nil);
        checkBox.state = self.filterBtn.state;
        checkBox.frame = CGRectMake(0, 0, 150, 45);
        
        if #available(macOS 11.0, *) {
            savePanel.allowedContentTypes = [.rtf]
        } else {
            savePanel.allowedFileTypes = ["rtf", "rrtf"]
        }
        savePanel.accessoryView = checkBox
        
        if (savePanel.runModal() == .OK) {
            var exportFiles = NSMutableArray()
            
            if (checkBox.state == .on) {
                
                for tfile in NSArray(array: _files) {
                    let file = tfile as! NSMutableDictionary;
                    
                    let degree = file.degree()
                    if (fabs(degree - 100) > 0) {
                        exportFiles.add(file);
                    }
                }
                if (exportFiles.count == 0) {
                    let alert = NSAlert.init()
                    alert.messageText = "所有对比项均无差异";
                    alert.runModal();
                    
                    return
                }
            }else {
                exportFiles = NSMutableArray(array: _files)
            }
            
            let url = savePanel.url!;
            NSLog("\(url)")
            let attString = NSMutableAttributedString(string: "");
            let needFilter = checkBox.state == .on
            
            self.progressIndicator.isHidden = false;
            self.progressIndicator.doubleValue = 0;
            processNextImages(attString, index: 0, files:exportFiles, url: url, needFilter: needFilter)
        }
    }
    
    // Save PDF
    func processNextImages(_ attString:NSMutableAttributedString, index:Int32, files:NSMutableArray, url:URL, needFilter:Bool) -> Void {
        let file = files[Int(index)] as! NSMutableDictionary
        
        
        let resultPath = NSString(string: file.resultPath()).appendingPathExtension("rtf")!
        
        let checkData = NSData.init(contentsOfFile: resultPath as String)! as Data
        var documentAttributes:NSDictionary!
        let tAttString = NSAttributedString.init(rtf: checkData, documentAttributes: &documentAttributes)
        
        if (tAttString != nil) {
            attString.append(NSMutableAttributedString(string: "\n\n"));
            attString.append(tAttString!)
        }
        
        self.closeBtn.isEnabled = false;
        
        DispatchQueue.global().async {
            
            if ((index+1) < files.count) {
                DispatchQueue.main.asyncAfter(deadline: DispatchTime.init(uptimeNanoseconds: 100)) {
                    
                    self.progressIndicator.doubleValue = Double(Int(index) * 100/files.count);
                    self.processNextImages(attString, index: index+1, files: files, url: url, needFilter: needFilter);
                };
            }else {
                DispatchQueue.global().async {
                    autoreleasepool {
                        // 写入文件
                        do {
                            let rtfData = try? attString.data(from: .init(location: 0, length: attString.length),
                                                           documentAttributes: [.documentType: NSAttributedString.DocumentType.rtf])
                            
                            let path = NSString(string: resultPath).appendingPathExtension("rtf")
                            try? FileManager.default.removeItem(at: url)
                            try? rtfData?.write(to: url)
                        } catch {
                        }
                        
                        DispatchQueue.main.async {
                            self.progressIndicator.isHidden = true;
                            self.progressIndicator.doubleValue = 100.0;
                            
                            self.closeBtn.isEnabled = true;
                            
                            NSWorkspace.shared.activateFileViewerSelecting([url])
                        }
                    }
                }
            }
        }
    }
    
    
    // Show
    func showIn(_ view:NSView, rect:NSRect) {
        if _popover == nil {
            _popover = NSPopover.init()
            _popover.contentViewController = self;
            _popover.delegate = self
        }
        _popover.contentSize = self.view.frame.size
        
        _popover.show(relativeTo: rect, of: view, preferredEdge: NSRectEdge.minY)
    }
    
    
    // Getter & Setter
    func setFiles(_ files:NSArray) {
        _files = files
        
        if (self.filterBtn.state == .on) {
            _showFiles = NSMutableArray()
            
            for tfile in NSArray(array: _files) {
                let file = tfile as! NSMutableDictionary;
                
                let degree = file.degree()
                if (fabs(degree - 100) > 0) {
                    _showFiles.add(file);
                }
            }
        }else {
            _showFiles = NSMutableArray (array: _files);
        }
        
        listView.reloadData()
    }
    
    
    // IBAction
    @IBAction func closeAction(_ sender: NSButton) {
        _popover.close()
    }
    
    
    // TableView Delegate
    func tableView(_ tableView: NSTableView, viewFor tableColumn: NSTableColumn?, row: Int) -> NSView? {
        return autoreleasepool {
            var cellView = tableView.makeView(withIdentifier: .init("StringCompareCellView"), owner: nil) as! StringCompareCellView?
            if (nil == cellView) {
                cellView = StringCompareCellView.shared() ?? nil
            }
            
            if (_showFiles.count > row) {
                let fileInfo = _showFiles[row] as! NSMutableDictionary
                
                cellView?.setFileInfo(fileInfo)
            }
            
            return cellView
        }
    }
    
    func selectionShouldChange(in tableView: NSTableView) -> Bool {
        
        return true
    }
    
    func tableView(_ tableView: NSTableView, shouldSelectRow row: Int) -> Bool {
        
        return false
    }
    
    func tableView(_ tableView: NSTableView, shouldSelect tableColumn: NSTableColumn?) -> Bool {
        
        return false
    }
    
    func tableView(_ tableView: NSTableView, mouseDownInHeaderOf tableColumn: NSTableColumn) {
        
    }
    
    func tableView(_ tableView: NSTableView, didClick tableColumn: NSTableColumn) {
        
    }
    
    func tableView(_ tableView: NSTableView, didDrag tableColumn: NSTableColumn) {
        
    }
    
    func tableView(_ tableView: NSTableView, heightOfRow row: Int) -> CGFloat {
        if (_showFiles.count > row) {
            let fileInfo = _showFiles[row] as! NSMutableDictionary
            
            return StringCompareCellView.heightFor(fileInfo)
        }
        return 0
    }
    
    func tableView(_ tableView: NSTableView, isGroupRow row: Int) -> Bool {
        return false
    }
    
    func tableView(_ tableView: NSTableView, sizeToFitWidthOfColumn column: Int) -> CGFloat {
        return tableView.frame.width
    }
    
    func tableView(_ tableView: NSTableView, rowActionsForRow row: Int, edge: NSTableView.RowActionEdge) -> [NSTableViewRowAction] {
        return []
    }
    
    func tableViewSelectionDidChange(_ notification: Notification) {
        
    }
    
    // TableView Data Source
    func numberOfRows(in tableView: NSTableView) -> Int {
        if nil == _showFiles {
            return 0
        }
        
        return _showFiles.count
    }
    
    //
    func popoverShouldClose(_ popover: NSPopover) -> Bool {
        return true
    }
    
    
}