import Cocoa
let pid = pid_t(CommandLine.arguments[1])!
let maxDepth = CommandLine.arguments.count > 2 ? Int(CommandLine.arguments[2])! : 12
let app = AXUIElementCreateApplication(pid)
func str(_ e: AXUIElement, _ a: String) -> String {
    var v: CFTypeRef?
    guard AXUIElementCopyAttributeValue(e, a as CFString, &v) == .success else { return "" }
    return "\(v!)"
}
func pos(_ e: AXUIElement) -> String {
    var v: CFTypeRef?
    guard AXUIElementCopyAttributeValue(e, kAXPositionAttribute as CFString, &v) == .success else { return "" }
    var p = CGPoint.zero
    AXValueGetValue(v as! AXValue, .cgPoint, &p)
    var v2: CFTypeRef?
    guard AXUIElementCopyAttributeValue(e, kAXSizeAttribute as CFString, &v2) == .success else { return "\(p)" }
    var s = CGSize.zero
    AXValueGetValue(v2 as! AXValue, .cgSize, &s)
    return String(format: "(%.0f,%.0f %.0fx%.0f)", p.x, p.y, s.width, s.height)
}
var count = 0
func walk(_ e: AXUIElement, _ depth: Int) {
    if depth > maxDepth || count > 3000 { return }
    count += 1
    let role = str(e, kAXRoleAttribute)
    let title = str(e, kAXTitleAttribute)
    let desc = str(e, kAXDescriptionAttribute)
    let val = str(e, kAXValueAttribute)
    let indent = String(repeating: "  ", count: depth)
    print("\(indent)\(role) \(pos(e)) t=\(title) d=\(desc) v=\(val.prefix(40))")
    var kids: CFTypeRef?
    if AXUIElementCopyAttributeValue(e, kAXChildrenAttribute as CFString, &kids) == .success, let arr = kids as? [AXUIElement] {
        for k in arr { walk(k, depth+1) }
    }
}
var winRef: CFTypeRef?
if AXUIElementCopyAttributeValue(app, kAXFocusedWindowAttribute as CFString, &winRef) == .success {
    walk(winRef as! AXUIElement, 0)
} else {
    print("no focused window")
}