//
//  KMEditPDFPopToolBarWindow.swift
//  PDF Reader Pro
//
//  Created by tangchao on 2024/6/25.
//

import Cocoa

@objcMembers class KMEditPDFPopToolBarWindow: NSWindow {
    static let shared = KMEditPDFPopToolBarWindow()
    
    var style: KMEditPDFToolbarStyle = .text
    var isMultiple: Bool = false
    
    let model = KMEditPDFModel()
    
    var itemClick: ((KMEditPDFToolbarItemKey, Any?)->Void)?
    
    convenience init() {
        let rect = NSRect(x: 0, y: 0, width: 400, height: 44)
        let styleMask: NSWindow.StyleMask = [.fullSizeContentView]
        self.init(contentRect: rect, styleMask: styleMask, backing: .buffered, defer: false)
    }
    
    override init(contentRect: NSRect, styleMask style: NSWindow.StyleMask, backing backingStoreType: NSWindow.BackingStoreType, defer flag: Bool) {
        super.init(contentRect: contentRect, styleMask: style, backing: backingStoreType, defer: flag)
        
        let contentViewC = KMEditPDFPopToolBarController()
        self.contentViewController = contentViewC
        
        self.titlebarAppearsTransparent = true
        self.titleVisibility = .hidden
//        self.level = .popUpMenu
//        self.isMovableByWindowBackground = false
        self.isMovable = false
        
        self.contentView?.wantsLayer = true
        self.contentView?.layer?.cornerRadius = 4
        self.contentView?.layer?.masksToBounds = true
        
        self.backgroundColor = .clear
        
        contentViewC.itemClick = { [weak self] itemKey, obj in
            self?.itemClick?(itemKey, obj)
        }
    }
    
    func show(relativeTo positioningRect: NSRect, of positioningView: NSView, preferredEdge: NSRectEdge) {
        let contentViewC = (self.contentViewController as? KMEditPDFPopToolBarController)
        contentViewC?.fontColor = self.model.fontColors.last ?? .black
        contentViewC?.areaCount = self.model.editingAreas?.count ?? 0
//        contentViewC?.toolbarView?.reloadData()
        
        var width: CGFloat = 392
        if self.style.contains(.text) {
            if self.style.contains(.image) { // text + image
                contentViewC?.itemKeys = [.alignmentLeft, .alignmentCenterX, .alignmentRight, .alignmentjustifiedX, .alignmentTop, .alignmentCenterY, .alignmentBottom, .alignmentjustifiedY]
                var datas: [KMEditPDFToolbarModel] = []
                for key in contentViewC?.itemKeys ?? [] {
                    let model = KMEditPDFToolbarModel()
                    model.itemKey = key
                    if key == .alignmentjustifiedX || key == .alignmentjustifiedY {
                        let areas = self.model.editingAreas ?? []
                        model.isEnabled = areas.count > 2 
                    }
                    datas.append(model)
                }
                contentViewC?.datas = datas
                width = 320-36
            } else { // text
                if self.isMultiple {
                    width = 478
                    contentViewC?.itemKeys = [.color, .fontStyle, .fontAdd, .fontReduce, .fontBold, .fontItalic, .textAlignment, .separator, .alignmentLeft, .alignmentTop]
                    var datas: [KMEditPDFToolbarModel] = []
                    for key in contentViewC?.itemKeys ?? [] {
                        let model = KMEditPDFToolbarModel()
                        model.itemKey = key
                        if key == .color {
                            model.isEnabled = self.model.editAreasFontColorIsEqual()
                        } else if key == .fontStyle {
                            if self.model.editAreasFontNameIsEqual() {
                                model.isEnabled = true
                                model.fontName = self.model.fontNames.first
                            } else {
                                model.isEnabled = false
                                model.fontName = nil
                            }
                        } else if key == .fontAdd {
                            model.isEnabled = self._fontSizeItemIsEnabled()
                        } else if key == .fontReduce {
                            model.isEnabled = self._fontSizeItemIsEnabled()
                        } else if key == .fontBold {
                            model.isEnabled = self.model.editAreasFontBoldIsEqual()
                            if self.model.editAreasFontBoldIsEqual() {
                                model.isSelected = self.model.fontBolds.first ?? false
                            }
                        } else if key == .fontItalic {
                            model.isEnabled = self.model.editAreasFontItalicIsEqual()
                            if self.model.editAreasFontItalicIsEqual() {
                                model.isSelected = self.model.fontItalics.first ?? false
                            }
                        } else if key == .textAlignment {
//                            model.isEnabled = self.model.editAreasTextAlignmentIsEqual()
                            if let data = self._fetchTextAlign() {
                                model.textAlign = data
                            }
//                            model.isSelected = true
                        }
                        datas.append(model)
                    }
                    contentViewC?.datas = datas
                } else {
                    var needUpdateData = false
                    
                    width = 392
                    contentViewC?.itemKeys = [.color, .fontStyle, .fontAdd, .fontReduce, .fontBold, .fontItalic, .textAlignment]
                    let keyCnt = contentViewC?.itemKeys.count ?? 0
                    let dataCnt = contentViewC?.datas.count ?? 0
                    if dataCnt == 0 || dataCnt != keyCnt {
                        needUpdateData = true
                    }
                    
                    var datas: [KMEditPDFToolbarModel] = []
                    for key in contentViewC?.itemKeys ?? [] {
                        let model = KMEditPDFToolbarModel()
                        model.itemKey = key
                        if key == .color {
                            model.isEnabled = self.model.editAreasFontColorIsEqual()
                        } else if key == .fontStyle {
                            if self.model.editAreasFontNameIsEqual() {
                                model.isEnabled = true
                                model.fontName = self.model.fontNames.first
                                
                                if model.fontName != self._fetchCurrentFontName() {
                                    needUpdateData = true
                                }
                            } else {
                                model.isEnabled = false
//                                model.fontName = "Helvetica"
                                model.fontName = "--"
                            }
                        } else if key == .fontAdd {
                            model.isEnabled = self._fontSizeItemIsEnabled()
                        } else if key == .fontReduce {
                            model.isEnabled = self._fontSizeItemIsEnabled()
                        } else if key == .fontBold {
                            model.isEnabled = self.model.editAreasFontBoldIsEqual()
                            model.isSelected = self.model.fontBolds.first ?? false
                            model.isChanged = model.isSelected != self._fetchCurrentBoldIsSelected()
                            
                            if model.isSelected != self._fetchCurrentBoldIsSelected() {
                                needUpdateData = true
                            }
                        } else if key == .fontItalic {
                            model.isEnabled = self.model.editAreasFontItalicIsEqual()
                            model.isSelected = self.model.fontItalics.first ?? false
                            
                            if model.isSelected != self._fetchCurrentItalicIsSelected() {
                                needUpdateData = true
                            }
                        } else if key == .textAlignment {
//                            model.isEnabled = self.model.editAreasTextAlignmentIsEqual()
                            if let data = self._fetchTextAlign() {
                                model.textAlign = data
                            }
//                            model.isSelected = true
                            
                            if model.textAlign != self._fetchCurrentTextAlign() {
                                needUpdateData = true
                            }
                        }
                        datas.append(model)
                    }
                    
                    if needUpdateData {
                        contentViewC?.datas = datas
                    }
                }
            }
        } else {
            if self.style.contains(.image) { // image
                if self.isMultiple {
                    width = 396-20
                    contentViewC?.itemKeys = [.leftRotate, .rightRotate, .separator, .reverseX, .reverseY, .separator, .crop, .replace, .export, .separator, .alignmentLeft, .alignmentTop]
                    var datas: [KMEditPDFToolbarModel] = []
                    for key in contentViewC?.itemKeys ?? [] {
                        let model = KMEditPDFToolbarModel()
                        model.itemKey = key
                        if key == .crop {
                            model.isEnabled = !self.isMultiple
                        } else if key == .replace {
                            model.isEnabled = !self.isMultiple
                        }
                        datas.append(model)
                    }
                    contentViewC?.datas = datas
                } else {
                    width = 304-16
                    contentViewC?.itemKeys = [.leftRotate, .rightRotate, .separator, .reverseX, .reverseY, .separator, .crop, .replace, .export]
                    var datas: [KMEditPDFToolbarModel] = []
                    for key in contentViewC?.itemKeys ?? [] {
                        let model = KMEditPDFToolbarModel()
                        model.itemKey = key
                        if key == .crop {
                            model.isEnabled = !self.isMultiple
                        }
                        datas.append(model)
                    }
                    contentViewC?.datas = datas
                }
            } else { // none
                
            }
        }
        
        let winFrame = positioningView.window?.frame ?? .zero
        var position = positioningView.convert(positioningRect.origin, to: nil)
        position.x += winFrame.origin.x
        position.y += winFrame.origin.y
        position.y += positioningRect.size.height
        position.y += 26
        position.x += (positioningRect.size.width*0.5-width*0.5)
//        var x = max(0, position.x)
        var x = max(winFrame.origin.x, position.x)
        let offsetX = x + width - NSMaxX(winFrame)
        if offsetX > 0 { // 超出右编辑
            x -= offsetX
        }
        var y = max(0, position.y)
        
        let screenFrame = NSScreen.main?.frame ?? .zero
        if y + 44 + 40 >= screenFrame.size.height {
            y = screenFrame.size.height - 44 - 40
        }
        let frame = NSMakeRect(x, y, width, 44)
        self.setFrame(frame, display: true)
        
        self.contentViewController?.view.frame = NSMakeRect(0, 0, width, 44)
        self.orderFront(nil)
//        self.makeKeyAndOrderFront(nil)
    }
    
    override var isMainWindow: Bool {
        return true
    }
    
    override var isKeyWindow: Bool {
        return true
    }
    
    func updateFontColor(fontColor: NSColor?) {
        if self.isVisible {
            let contentViewC = self.contentViewController as? KMEditPDFPopToolBarController
            contentViewC?.fontColor = fontColor
            for model in contentViewC?.datas ?? [] {
                if model.itemKey == .color {
                    model.isEnabled = fontColor != nil
                    contentViewC?.toolbarView?.reloadData()
                    break;
                }
            }
        }
    }
    
    func updateTextAlign(align: NSTextAlignment) {
        if self.isVisible {
            let contentViewC = self.contentViewController as? KMEditPDFPopToolBarController
            for model in contentViewC?.datas ?? [] {
                if model.itemKey == .textAlignment {
                    if model.textAlign == align {
                        break;
                    }
                    model.textAlign = align
                    contentViewC?.toolbarView?.reloadData()
                    break;
                }
            }
        }
    }
    
    func updateFontSizeButtons(enable: Bool) {
        if self.isVisible {
            let contentViewC = self.contentViewController as? KMEditPDFPopToolBarController
            for model in contentViewC?.datas ?? [] {
                if model.itemKey == .fontAdd || model.itemKey == .fontReduce {
                    model.isEnabled = enable
                }
            }
            contentViewC?.toolbarView?.reloadData()
        }
    }
    
    // MARK: - Private Methods
    
    private func _fontSizeItemIsEnabled() -> Bool {
        if self.model.editAreasFontSizeIsEqual() {
            if let fontSize = self.model.fontSizes.first, fontSize == -1 {
                return false
            } else {
                return true
            }
        } else {
            return false
        }
    }
    
    private func _fetchTextAlign() -> NSTextAlignment? {
        if self.model.editAreasTextAlignmentIsEqual() {
            return self.model.textAlignments.first
        }
        return nil
    }
    
    private func _fetchCurrentBoldIsSelected() -> Bool {
        guard let contentC = self.contentViewController as? KMEditPDFPopToolBarController else {
            return false
        }
        for model in contentC.datas {
            if model.itemKey == .fontBold {
                return model.isSelected
            }
        }
        return false
    }
    
    private func _fetchCurrentItalicIsSelected() -> Bool {
        guard let contentC = self.contentViewController as? KMEditPDFPopToolBarController else {
            return false
        }
        for model in contentC.datas {
            if model.itemKey == .fontItalic {
                return model.isSelected
            }
        }
        return false
    }
    
    private func _fetchCurrentTextAlign() -> NSTextAlignment? {
        guard let contentC = self.contentViewController as? KMEditPDFPopToolBarController else {
            return nil
        }
        for model in contentC.datas {
            if model.itemKey == .textAlignment {
                return model.textAlign
            }
        }
        return nil
    }
    
    private func _fetchCurrentFontName() -> String? {
        guard let contentC = self.contentViewController as? KMEditPDFPopToolBarController else {
            return nil
        }
        for model in contentC.datas {
            if model.itemKey == .fontStyle {
                return model.fontName
            }
        }
        return nil
    }
}

extension KMEditPDFPopToolBarWindow: KMInterfaceThemeChangedProtocol {
    func interfaceThemeDidChanged(_ appearance: NSAppearance.Name) {
        self.appearance = .init(named: appearance)
        
        self.contentViewController?.interfaceThemeDidChanged(appearance)
    }
}