//
//  KMNQuickToolWindowController.swift
//  PDF Reader Pro
//
//  Created by 丁林圭 on 2024/10/10.
//

import Cocoa

import KMComponentLibrary

//MARK: - KMNQuickToolWindowDelegate
protocol KMNQuickToolWindowDelegate: AnyObject {
    func quickToolWindowControllerUpdate()
}

//MARK: - KMNQuickToolWindowController
class KMNQuickToolWindowController: KMNBaseWindowController, NSCollectionViewDelegate, NSCollectionViewDataSource,NSCollectionViewDelegateFlowLayout {
    weak open var delegate: KMNQuickToolWindowDelegate?
    
    @IBOutlet var viewBackBox: NSBox!
    
    @IBOutlet var titleLabel: NSTextField!
    @IBOutlet var titleBox: NSBox!
    @IBOutlet var titleSubLabel: NSTextField!
    
    @IBOutlet var showBox: NSBox!
    @IBOutlet var showCollectionView: NSCollectionView!
    
    @IBOutlet var cancelButton: ComponentButton!
    @IBOutlet var applyButton: ComponentButton!

    @IBOutlet var cancelWidthButton:NSLayoutConstraint!
    @IBOutlet var applyWidthButton:NSLayoutConstraint!
        
    var quickToolsItemMutableArray: [Int] = []
        
    var draggedItemIndexPath: IndexPath?
    
    var changeIndexPaths: Set<IndexPath> = []

    lazy var showDates: [KMNHomeQuickToolMode] = {
        var fullDatas: [KMNHomeQuickToolMode] = []
        for itemRaw in KMNHomeQuickToolManager.defaultManager.fullToolsItemMutableArray {
            let toolMode = KMNHomeQuickToolMode.toolModeData(type: HomeQuickToolType(rawValue: itemRaw) ?? .Batch)
            fullDatas.append(toolMode)
        }
        return fullDatas
    }()

    override func windowDidLoad() {
        super.windowDidLoad()
        
        quickToolsItemMutableArray = KMNHomeQuickToolManager.defaultManager.quickToolsItemMutableArray
        
        updateButtonState()
        
        showCollectionView.delegate = self
        showCollectionView.dataSource = self
        showCollectionView.isSelectable = true //支持拖拽需设置未True
                
        showCollectionView.register(KMNQuickToolCollectionViewItem.self, forItemWithIdentifier: NSUserInterfaceItemIdentifier(rawValue: "KMNQuickToolShowCollectionViewItem"))
        
        showCollectionView.registerForDraggedTypes([.string])
        showCollectionView.setDraggingSourceOperationMask(.every, forLocal: false)
        showCollectionView.setDraggingSourceOperationMask(.every, forLocal: true)
    }
    
    func reloadData() {
        showCollectionView.reloadData()
    }
    
    override func initContentView() {
        titleLabel.font = ComponentLibrary.shared.getFontFromKey("mac/body-m-medium")
        
        titleSubLabel.font = ComponentLibrary.shared.getFontFromKey ("mac/body-xs-regular")
        
        applyButton.properties = ComponentButtonProperty(type: .primary,
                                                         size: .s,
                                                         state: .normal,
                                                         buttonText: KMLocalizedString("Apply"))
        applyButton.setTarget(self, action: #selector(applyButtonClicked(_ :)))
        
        cancelButton.properties = ComponentButtonProperty(type: .default_tertiary,
                                                          size: .s,
                                                          state: .normal,
                                                          buttonText: KMLocalizedString("Cancel"))
        cancelButton.setTarget(self, action: #selector(cancelButtonClicked(_ :)))
    }
    
    override func updateUIThemeColor() {
        window?.contentView?.wantsLayer = true
        window?.contentView?.layer?.backgroundColor = ComponentLibrary.shared.getComponentColorFromKey("colorBorder/popUp").cgColor

        titleLabel.textColor = ComponentLibrary.shared.getComponentColorFromKey("colorText/1")
        
        titleBox.fillColor = ComponentLibrary.shared.getComponentColorFromKey("colorFill/3-default")
        titleBox.borderColor = ComponentLibrary.shared.getComponentColorFromKey("colorBorder/3-default")
        titleSubLabel.textColor = ComponentLibrary.shared.getComponentColorFromKey("colorText/2")

        cancelButton.reloadData()
        applyButton.reloadData()
    }
    
    override func updateUILanguage() {
        titleSubLabel.stringValue = KMLocalizedString("Select a maximum of 8 tools. You can drag and drop to reorder the tools display.")
        titleLabel.stringValue = KMLocalizedString("Manage Quick Tools")

        showCollectionView.reloadData()
        cancelButton.properties.buttonText = KMLocalizedString("Cancel")
        applyButton.properties.buttonText = KMLocalizedString("Apply")
        
        cancelWidthButton.constant = cancelButton.properties.propertyInfo.viewWidth
        applyWidthButton.constant = applyButton.properties.propertyInfo.viewWidth
    }
    
    private func updateButtonState() {
        if self.quickToolsItemMutableArray.count < 1 {
            if applyButton.properties.isDisabled == false {
                applyButton.properties.isDisabled = true
                applyButton.reloadData()
            }
        } else {
            if applyButton.properties.isDisabled == true {
                applyButton.properties.isDisabled = false
                applyButton.reloadData()
            }
        }
    }

    private func updateCellOpacity(at location: NSPoint, opacity: CGFloat) {
        let pointInCollectionView = showCollectionView.convert(location, from: nil)
        if let indexPath = showCollectionView.indexPathForItem(at: pointInCollectionView) {
            if let item = showCollectionView.item(at: indexPath) as? KMNQuickToolCollectionViewItem {
                item.view.alphaValue = opacity
            }
        }
    }
    
    private func resetCellOpacity() {
        for item in showCollectionView.visibleItems() {
            item.view.alphaValue = 1.0
        }
    }
    
    //MARK: - Action
    @objc func cancelButtonClicked(_ sender: NSView) {
        own_closeEndSheet()
    }
    
    @objc func applyButtonClicked(_ sender: NSView) {
        var seleteDatas:[Int] = []
        var fullDatas:[Int] = []

        for i in 0 ... showDates.count-1 {
            let indexPath = NSIndexPath(forItem: i, inSection: 0)
            if let cell = showCollectionView.item(at: indexPath as IndexPath) as? KMNQuickToolCollectionViewItem {
                if cell.itemCardView.properties.isSelected == true {
                    seleteDatas.append(cell.quickToolModel.quickToolType.rawValue)
                }
                fullDatas.append(cell.quickToolModel.quickToolType.rawValue)
            }
        }
        
        KMNHomeQuickToolManager.defaultManager.quickToolsItemMutableArray = seleteDatas
        KMNHomeQuickToolManager.defaultManager.fullToolsItemMutableArray = fullDatas

        self.delegate?.quickToolWindowControllerUpdate()
        
        own_closeEndSheet()
    }
    
    //MARK: - NSCollectionViewDataSource
    func collectionView(_ collectionView: NSCollectionView, numberOfItemsInSection section: Int) -> Int {
        return showDates.count
    }
    
    func collectionView(_ collectionView: NSCollectionView, itemForRepresentedObjectAt indexPath: IndexPath) -> NSCollectionViewItem {
        let item: KMNQuickToolCollectionViewItem = collectionView.makeItem(withIdentifier: NSUserInterfaceItemIdentifier(rawValue: "KMNQuickToolShowCollectionViewItem"), for: indexPath) as! KMNQuickToolCollectionViewItem
        item.quickToolModel = showDates[indexPath.item]
        item.isNewState = item.quickToolModel.isNewState
        
        if(quickToolsItemMutableArray.contains(item.quickToolModel.quickToolType.rawValue)) {
            item.isShowState = true
        } else {
            item.isShowState = false
        }
        
        item.clickCallBack = {[weak self] isSelecton in
            guard let weakSelf = self else { return }
            if(isSelecton) {
                if(weakSelf.quickToolsItemMutableArray.count < 8) {
                    weakSelf.quickToolsItemMutableArray.append(item.quickToolModel.quickToolType.rawValue)
                } else {
                    item.isShowState = false

                    let contextString = KMLocalizedString("You can select up to 8 tools. Please cancel and select.")
                    let superView = weakSelf.window?.contentView ?? NSView()
                    
                  _ = KMNCustomAlertView.alertView(message: contextString, type: .normal_custom, fromView: superView, point:CGPointMake(superView.frame.origin.x + superView.frame.size.width/2, superView.frame.origin.y + superView.frame.size.height/2))
                }
            } else {
                weakSelf.quickToolsItemMutableArray.removeObject(item.quickToolModel.quickToolType.rawValue)
            }
            weakSelf.updateButtonState()
        }
        return item
    }
    
    // MARK: - NSCollectionViewDelegateFlowLayout

    func collectionView(_ collectionView: NSCollectionView, layout collectionViewLayout: NSCollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> NSSize {
        return CGSize(width: 204.0, height: 56.0)
    }
    
    func collectionView(_ collectionView: NSCollectionView, layout collectionViewLayout: NSCollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
        return 4
    }
    
    func collectionView(_ collectionView: NSCollectionView, layout collectionViewLayout: NSCollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
        return 4
    }
    
    public func collectionView(_ collectionView: NSCollectionView, layout collectionViewLayout: NSCollectionViewLayout, insetForSectionAt section: Int) -> NSEdgeInsets {
        return NSEdgeInsetsMake(0, 8, 0, 0)
    }
    
    //MARK: - NSCollectionViewDelegate
    
    func collectionView(_ collectionView: NSCollectionView, canDragItemsAt indexPaths: Set<IndexPath>, with event: NSEvent) -> Bool {
        return true
    }

    func collectionView(_ collectionView: NSCollectionView, pasteboardWriterForItemAt indexPath: IndexPath) -> NSPasteboardWriting? {
        return String(indexPath.item) as NSPasteboardWriting
    }

    func collectionView(_ collectionView: NSCollectionView, validateDrop draggingInfo: NSDraggingInfo, proposedIndexPath proposedDropIndexPath: AutoreleasingUnsafeMutablePointer<NSIndexPath>, dropOperation proposedDropOperation: UnsafeMutablePointer<NSCollectionView.DropOperation>) -> NSDragOperation {
        resetCellOpacity()
        updateCellOpacity(at: draggingInfo.draggingLocation, opacity: 0.5)
        return .move
    }
    
    func collectionView(_ collectionView: NSCollectionView, draggingSession session: NSDraggingSession, willBeginAt screenPoint: NSPoint, forItemsAt indexPaths: Set<IndexPath>) {
        draggedItemIndexPath = indexPaths.first
    }
    
    func collectionView(_ collectionView: NSCollectionView, acceptDrop draggingInfo: NSDraggingInfo, indexPath: IndexPath, dropOperation: NSCollectionView.DropOperation) -> Bool {
        let result = false
        
        let toItemIndex = indexPath.item
        guard let fromItemIndex = draggedItemIndexPath?.item else {
            return result
        }
        
        // 确保索引有效
        if fromItemIndex < 0 || fromItemIndex >= showDates.count || toItemIndex < 0 || toItemIndex > showDates.count {
            return result // 无效索引
        }
        var indexPaths: Set<IndexPath> = []

        if dropOperation == .before {
            let num = showDates[fromItemIndex]
            showDates.insert(num, at: toItemIndex)
            
            if toItemIndex > fromItemIndex { // 向后移动
                showDates.remove(at: fromItemIndex)
            } else {
                showDates.remove(at: fromItemIndex + 1)
            }
            
            for i in min(fromItemIndex, toItemIndex)..<(max(fromItemIndex, toItemIndex)+1) {
                indexPaths.insert(IndexPath(item: i, section: 0))
            }
            showCollectionView.reloadItems(at: indexPaths)
        } else {
            let fromIndexPath = IndexPath(item: fromItemIndex, section: 0)
            indexPaths = [indexPath, fromIndexPath]
            
            showDates.swapAt(fromItemIndex, toItemIndex)
            showCollectionView.reloadItems(at: indexPaths)
        }
        
        changeIndexPaths = [indexPath]
        return true
    }
    
    func collectionView(_ collectionView: NSCollectionView, draggingSession session: NSDraggingSession, endedAt screenPoint: NSPoint, dragOperation operation: NSDragOperation) {
        for targetIndexPath in changeIndexPaths {
            let targetItem = collectionView.item(at: targetIndexPath)
            targetItem?.view.shakeAnimation()
        }
        
        changeIndexPaths = []
        resetCellOpacity()
    }
    
}