import AppKit

// MARK: - Event Capture Window
class EventCaptureWindow: NSWindow {
    override var canBecomeKey: Bool {
        return true
    }
    
    override var canBecomeMain: Bool {
        return true
    }
    
    override func sendEvent(_ event: NSEvent) {
        // During screenshot selection, we want to capture ALL events
        // and prevent them from reaching other windows
        switch event.type {
        case .leftMouseDown, .leftMouseUp, .leftMouseDragged,
             .rightMouseDown, .rightMouseUp, .rightMouseDragged,
             .otherMouseDown, .otherMouseUp, .otherMouseDragged,
             .mouseMoved, .mouseEntered, .mouseExited,
             .scrollWheel, .keyDown, .keyUp:
            // Process the event normally through our view hierarchy
            super.sendEvent(event)
            // DO NOT pass the event to other windows - this prevents
            // other windows from being dragged or interacted with
            return
        default:
            // For other event types, allow normal processing
            super.sendEvent(event)
        }
    }
}

// MARK: - Event Capture View
class EventCaptureView: NSView {
    weak var screenshotApp: ScreenshotApp?
    var shouldDisplayAllScreensActiveText: Bool = false // Nieuwe property
    
    override init(frame frameRect: NSRect) {
        super.init(frame: frameRect)
        setupView()
    }
    
    required init?(coder: NSCoder) {
        super.init(coder: coder)
        setupView()
    }
    
    private func setupView() {
        // This view will handle mouse events - no special setup needed
        self.wantsLayer = true // Zorg ervoor dat de view een layer heeft voor efficiënt tekenen
    }
    
    override func draw(_ dirtyRect: NSRect) {
        super.draw(dirtyRect) // Belangrijk voor standaard teken gedrag

        if shouldDisplayAllScreensActiveText {
            // Teken "Alle Schermen Actief" tekst-overlay bovenaan het scherm van deze view
            let instructionText = "All Screens Mode, Click to Capture, ESC to Cancel"
            let attributes: [NSAttributedString.Key: Any] = [
                .font: NSFont.systemFont(ofSize: 18, weight: .medium),
                .foregroundColor: NSColor.white.withAlphaComponent(0.9),
                .strokeColor: NSColor.black.withAlphaComponent(0.5), // Tekst outline
                .strokeWidth: -2.0, // Negatief voor outline binnen de letters
                .paragraphStyle: {
                    let style = NSMutableParagraphStyle()
                    style.alignment = .center
                    return style
                }()
            ]
            let attributedString = NSAttributedString(string: instructionText, attributes: attributes)
            let textSize = attributedString.size()
            
            // self.bounds is de grootte van deze EventCaptureView, die het hele scherm beslaat.
            let viewBounds = self.bounds 

            let textRect = NSRect(x: (viewBounds.width - textSize.width) / 2,
                                  y: viewBounds.height - textSize.height - 30, // 30px van de top van het scherm
                                  width: textSize.width,
                                  height: textSize.height)
            
            let backgroundPadding: CGFloat = 10
            let backgroundRect = NSRect(
                x: textRect.origin.x - backgroundPadding,
                y: textRect.origin.y - backgroundPadding,
                width: textRect.width + (2 * backgroundPadding),
                height: textRect.height + (2 * backgroundPadding)
            )
            let BORDER_RADIUS: CGFloat = 10
            let textBackgroundPath = NSBezierPath(roundedRect: backgroundRect, xRadius: BORDER_RADIUS, yRadius: BORDER_RADIUS)
            NSColor.black.withAlphaComponent(0.4).setFill()
            textBackgroundPath.fill()

            attributedString.draw(in: textRect)
            // NSLog("🎨 EventCaptureView: Drew 'Alle Schermen Actief' text.")
        }
    }
    
    override func mouseDown(with event: NSEvent) {
        guard let app = screenshotApp else { 
            // Even if app is nil, consume the event to prevent it from reaching other windows
            return
        }
        
        if app.isMultiMonitorSelectionActive && !app.isDragging {
            let globalLocation = NSEvent.mouseLocation
            print("🎯 Event capture - starting selection at: \(globalLocation)")
            
            // SET MOUSE TRACKING VARIABLES FOR SINGLE CLICK DETECTION
            let allScreenModifier: UInt = (1 << 0) // Command key
            app.isAllScreenModifierPressed = app.isModifierPressed(event.modifierFlags, modifier: allScreenModifier)
            app.mouseDownLocation = globalLocation
            app.mouseDownTime = CACurrentMediaTime()
            app.hasMouseMoved = false
            

            
            // Hide crosshairs during drag to prevent stuck crosshair issue
            hideCrosshairs()
            
            app.startDragSelection(at: globalLocation)
        }
        // DO NOT call super.mouseDown - this prevents the event from propagating
    }
    
    override func mouseDragged(with event: NSEvent) {
        guard let app = screenshotApp else { 
            // Even if app is nil, consume the event to prevent it from reaching other windows
            return
        }
        
        if app.isMultiMonitorSelectionActive && app.isDragging {
            let globalLocation = NSEvent.mouseLocation
            app.hasMouseMoved = true  // MARK THAT MOUSE HAS MOVED
            app.updateDragSelection(to: globalLocation)
        }
        // DO NOT call super.mouseDragged - this prevents the event from propagating
    }
    
    override func mouseUp(with event: NSEvent) {
        guard let app = screenshotApp else { 
            // Even if app is nil, consume the event to prevent it from reaching other windows
            return
        }
        
        if app.isMultiMonitorSelectionActive && app.isDragging {
            let globalLocation = NSEvent.mouseLocation
            
            // CHECK FOR SINGLE CLICK FIRST
            let timeSinceMouseDown = CACurrentMediaTime() - app.mouseDownTime
            let distanceMoved = sqrt(pow(globalLocation.x - app.mouseDownLocation.x, 2) + pow(globalLocation.y - app.mouseDownLocation.y, 2))
            
            print("🎯 EventCaptureView - mouse up at: \(globalLocation)")
            print("🎯 Time since down: \(timeSinceMouseDown)s, distance: \(distanceMoved)px, moved: \(app.hasMouseMoved), allScreenModifierPressed: \(app.isAllScreenModifierPressed), allScreensToggled: \(app.isAllScreensCaptureToggledOn)")
            

            
            // 1. NIEUW: Als "alle schermen" modus is GETOGGLED AAN, en het is een klik (geen drag)
            if app.isAllScreensCaptureToggledOn && !app.hasMouseMoved && distanceMoved < 5.0 && timeSinceMouseDown < 0.5 {
                print("🎯 Click detected (toggle ON) - capturing all screens")
                app.deactivateMultiMonitorSelection()
                app.captureAllScreens() // captureAllScreens reset zelf de toggle
                app.resetTrackingVariables()
                return
            }

            // 2. Prioriteit: Single click voor huidige scherm (als toggle NIET aanstaat)
            if !app.hasMouseMoved && distanceMoved < 5.0 && timeSinceMouseDown < 0.5 && !app.isAllScreenModifierPressed {
                print("🎯 Single click detected (toggle OFF) - capturing current screen")
                app.deactivateMultiMonitorSelection()
                app.captureCurrentScreen(at: globalLocation)
                app.resetTrackingVariables() // RESET for clean state
                return
            }
            
            // 4. Anders, normale selectie beëindigen
            print("🎯 Ending drag selection normally")
            app.endDragSelection(at: globalLocation)
            
            // Show crosshairs again after drag ends
            showCrosshairs()
        }
        // DO NOT call super.mouseUp - this prevents the event from propagating
    }
    
    override func rightMouseDown(with event: NSEvent) {
        // Handle right-click to cancel selection
        guard let app = screenshotApp else { return }
        
        if app.isMultiMonitorSelectionActive {
            print("🎯 Event capture - right-click, canceling selection")
            app.cancelMultiMonitorSelection()
        }
        // DO NOT call super.rightMouseDown - this prevents the event from propagating
    }
    
    override func rightMouseUp(with event: NSEvent) {
        // Consume right mouse up events during selection
        // DO NOT call super.rightMouseUp - this prevents the event from propagating
    }
    
    override func otherMouseDown(with event: NSEvent) {
        // Consume other mouse button events during selection
        // DO NOT call super.otherMouseDown - this prevents the event from propagating
    }
    
    override func otherMouseUp(with event: NSEvent) {
        // Consume other mouse button events during selection
        // DO NOT call super.otherMouseUp - this prevents the event from propagating
    }
    
    override func scrollWheel(with event: NSEvent) {
        // Consume scroll wheel events during selection
        // DO NOT call super.scrollWheel - this prevents the event from propagating
    }
    
    override func keyDown(with event: NSEvent) {
        // Only handle ESC key if multi-monitor selection is active
        if event.keyCode == 53 && screenshotApp?.isMultiMonitorSelectionActive == true { // ESC key
            screenshotApp?.cancelMultiMonitorSelection()
            return // Consume event
        }

        // The Command-key handling has been moved to the flagsChanged handler
        // in MultiMonitorSystem.swift to implement the toggle correctly.

        super.keyDown(with: event)
    }
    
    override func keyUp(with event: NSEvent) {
        // ... existing code ...
        super.keyUp(with: event)
    }
    
    override var acceptsFirstResponder: Bool {
        return true
    }
    
    override func becomeFirstResponder() -> Bool {
        print("⌨️ EventCaptureView becoming first responder")
        return super.becomeFirstResponder()
    }
    
    private func hideCrosshairs() {
        // Find all crosshair views in the window hierarchy and hide them
        if let window = self.window {
            findAndHideCrosshairs(in: window.contentView)
        }
    }
    
    private func showCrosshairs() {
        // Find all crosshair views in the window hierarchy and show them
        if let window = self.window {
            findAndShowCrosshairs(in: window.contentView)
        }
    }
    
    private func findAndHideCrosshairs(in view: NSView?) {
        guard let view = view else { return }
        
        for subview in view.subviews {
            if let crosshair = subview as? CrosshairCursorView {
                crosshair.stopTracking()
            }
            findAndHideCrosshairs(in: subview)
        }
    }
    
    private func findAndShowCrosshairs(in view: NSView?) {
        guard let view = view else { return }
        
        for subview in view.subviews {
            if let crosshair = subview as? CrosshairCursorView {
                crosshair.isHidden = false
                crosshair.startTracking()
            }
            findAndShowCrosshairs(in: subview)
        }
    }
}