//
//  ContentView.swift
//  MSG Desktop
//
//  Created by Chad Nelson on 3/8/25.
//

import SwiftUI

struct ContentView: View {
    @State public var output: String = "Please select an option \n"
    private let maxLines = 300
    @State private var showCancelButton: Bool = false 
    var body: some View {
        VStack {
            Image(systemName: "globe")
                .imageScale(.large)
                .foregroundStyle(.tint)
            ScrollViewReader { proxy in
                ScrollView {
                    VStack(alignment: .leading) {
                        TextEditor(text: $output)
                            .font(.system(.body, design: .monospaced))
                            .frame(minWidth: 750, minHeight: 300)
                            .padding()
                            .disabled(true)
                        
                        Text("")
                            .id("bottom")
                    }
                }
                .onChange(of: output) { _, _ in
                    trimLinesIfNeeded()
                    withAnimation {
                        proxy.scrollTo("bottom", anchor: .bottom)
                    }
                }
            }
            HStack {
                Button(action: {
                    DispatchQueue.main.async {
                        self.showCancelButton = true
                    }
                    runShellCommandAsync(command: "msg machine init", outputText: $output, showButton: $showCancelButton)
                     
                }) {
                    Text("Init")
                }
                Button(action: {
                    DispatchQueue.main.async {
                        self.showCancelButton = true
                    }
                    runShellCommandAsync(command: "rm -rf ~/.guix && msg machine init", outputText: $output, showButton: nil)                }) {
                    Text("Reinit")
                }
                Button(action: {
                    runShellCommandAsync(command: "msg machine start", outputText: $output, showButton: nil)                }) {
                    Text("Start")
                }
                if showCancelButton {
                    Button(action: {
                        runShellCommandAsync(command: "kill $(ps aux | grep '[g]uile' | awk '{print $2}')", outputText: $output, showButton: nil)
                        runShellCommandAsync(command: "kill $(ps aux | grep '[q]emu' | awk '{print $2}')", outputText: $output, showButton: nil)
                        DispatchQueue.main.async {
                            self.showCancelButton = false
                        }}) {
                        Text("Cancel")
                    }
                }
                if !showCancelButton{
                    Button(action: {
                        runShellCommandAsync(command: "msg machine stop", outputText: $output, showButton: nil)                }) {
                        Text("Stop")
                    }
                }
                
                Button(action: {
                    runShellCommandAsync(command: "osascript -e 'tell application \"Terminal\" to do script \"msg shell\"' -e 'tell application \"Terminal\" to activate'", outputText: $output, showButton: nil)
                    
                }) {
                    Text("Shell")
                }
            }
            
            
        }
        .padding()
        .frame(width: 800, height: 400)
    }

    
    private func trimLinesIfNeeded() {
            let lines = output.split(separator: "\n")
            
            if lines.count > maxLines {
                _ = lines.count - maxLines
                let trimmedLines = lines.suffix(maxLines) // Keep only the last 300 lines
                output = trimmedLines.joined(separator: "\n") // Join back to a single string
            }
        }
}

#Preview {
    ContentView()
}