//
//  KMPopUpButton.swift
//  PDF Reader Pro
//
//  Created by lizhe on 2023/10/9.
//

import Cocoa

@objc enum KMPopUpButtonType: Int {
    case table = 0
    case arrowDown = 1
    case arrowUpDown = 2
    case noArrow = 3
}

@objcMembers class KMPopUpButton: NSPopUpButton {
    var buttonImage: NSImage?
    var type: KMPopUpButtonType = .arrowUpDown {
        didSet {
            switch type {
            case .table, .arrowDown, .arrowUpDown:
                wantsLayer = true
                layer?.borderWidth = 1.0
                layer?.cornerRadius = 4.0
                layer?.borderColor = KMAppearance.Layout.bgColor().cgColor
                bezelStyle = .shadowlessSquare
            case .noArrow:
                break
            }
        }
    }
    
    override func draw(_ dirtyRect: NSRect) {
        super.draw(dirtyRect)

        var frameSize = bounds
        var image = NSImage(named: KMImageNameUXIconBtnArrowUpdown)
        var titleFloat: CGFloat = 8.0

        switch type {
        case .table:
            KMAppearance.Layout.l1Color().setFill()
            frameSize.fill()
            

            if let tableImg = self.buttonImage {
                var tableRect = NSZeroRect
                tableRect.size = tableImg.size
                var p1 = frameSize.origin
                p1.x += frameSize.size.width - tableImg.size.width - 8
                p1.y += (frameSize.size.height - tableImg.size.height) / 2
                tableImg.draw(in: NSMakeRect(8, 4, tableImg.size.width, tableImg.size.height),
                              from: tableRect,
                              operation: .sourceOver,
                              fraction: 1.0,
                              respectFlipped: true,
                              hints: nil)

                titleFloat += tableImg.size.width + 9.0

                // 对选中的item设置勾选
                for item in super.itemArray {
                    if item == selectedItem {
                        item.state = .on
                    } else {
                        item.state = .off
                    }
                }

                let title = selectedItem?.title as NSString? ?? ""
                let titleSize = title.size(withAttributes: [NSAttributedString.Key.font: font as Any])

                let titleY = frameSize.origin.y + (frameSize.size.height - titleSize.height) / 2
                var rectTitle = frameSize
                rectTitle.origin = NSPoint(x: titleFloat, y: titleY)
                rectTitle.size.height = titleSize.height
                title.draw(in: rectTitle, withAttributes: [NSAttributedString.Key.foregroundColor: KMAppearance.Layout.h0Color()])
            }
        case .arrowDown:
            image = NSImage(named: KMImageNameUXIconBtnArrowDown)
        case .arrowUpDown:
            break
        default:
            break
        }

        var rect = NSRect.zero
        rect.size = CGSize(width: 16.0, height: 16.0)
        var p = frameSize.origin
        p.x += frameSize.size.width - 17
        p.y += (frameSize.size.height - 16) / 2
        image?.draw(in: NSMakeRect(p.x, p.y, 16.0, 16.0),
                    from: rect,
                    operation: .sourceOver,
                    fraction: 1.0,
                    respectFlipped: true,
                    hints: nil)
    }
}

class KMPopUpButtonCell: NSPopUpButtonCell {
    override func edit(withFrame cellFrame: NSRect, in controlView: NSView, editor textObj: NSText, delegate: Any?, event: NSEvent?) {
        super.edit(withFrame: adjustedFrameToVerticallyCenterText(cellFrame), in: controlView, editor: textObj, delegate: delegate, event: event)
    }
    
    override func select(withFrame cellFrame: NSRect, in controlView: NSView, editor textObj: NSText, delegate: Any?, start selStart: Int, length selLength: Int) {
        super.select(withFrame: adjustedFrameToVerticallyCenterText(cellFrame), in: controlView, editor: textObj, delegate: delegate, start: selStart, length: selLength)
    }
    
    override func drawInterior(withFrame cellFrame: NSRect, in controlView: NSView) {
        super.drawInterior(withFrame: adjustedFrameToVerticallyCenterText(cellFrame), in: controlView)
    }
    
    private func adjustedFrameToVerticallyCenterText(_ frame: NSRect) -> NSRect {
        let offset = floor((frame.size.height / 2 - (font!.ascender + font!.descender)))
        return frame.insetBy(dx: 0.0, dy: offset)
    }
}