import AppKit
import SwiftUI

/// Longer text results (Info, Read QR, Statistics, archive listings).
final class ResultWindowController {
    static let shared = ResultWindowController()

    private var window: NSWindow?

    private init() {}

    func show(title: String, body: String) {
        let view = ResultView(title: title, text: body, onClose: { [weak self] in self?.close() })
        close()

        let window = NSWindow(
            contentRect: NSRect(x: 0, y: 0, width: 460, height: 320),
            styleMask: [.titled, .closable, .resizable, .fullSizeContentView],
            backing: .buffered,
            defer: false
        )
        window.title = title
        window.titlebarAppearsTransparent = true
        window.level = .floating
        window.contentView = NSHostingView(rootView: view)
        window.center()
        NSApp.activate(ignoringOtherApps: true)
        window.makeKeyAndOrderFront(nil)
        self.window = window
    }

    func close() {
        window?.orderOut(nil)
        window = nil
    }
}

struct ResultView: View {
    let title: String
    let text: String
    let onClose: () -> Void

    var body: some View {
        VStack(spacing: 0) {
            ScrollView {
                Text(text)
                    .font(.system(size: 11.5, design: .monospaced))
                    .textSelection(.enabled)
                    .frame(maxWidth: .infinity, alignment: .leading)
                    .padding(14)
            }
            Divider().opacity(0.4)
            HStack {
                Button("Copy") {
                    NSPasteboard.general.clearContents()
                    NSPasteboard.general.setString(text, forType: .string)
                }
                Spacer()
                Button("Done", action: onClose)
                    .keyboardShortcut(.defaultAction)
            }
            .padding(10)
        }
        .frame(minWidth: 420, minHeight: 260)
    }
}