#!/usr/bin/env luash
-- Interactive Luash Demo/REPL Alternative
-- Shows how to build interactive features within luash

print("🚀 Luash Interactive Demo")
print("This demonstrates interactive capabilities in luash")
print()

-- Simple command processor
function process_command(cmd)
    cmd = cmd:match("^%s*(.-)%s*$") -- trim
    
    if cmd == "help" then
        print([[
Available commands:
  sysinfo    - Show system information
  files      - List files in current directory  
  env        - Show environment variables
  network    - Test network connectivity
  processes  - Show running processes
  disk       - Show disk usage
  quit       - Exit
  
Or type any luash expression!]])
    
    elseif cmd == "sysinfo" then
        print("System Information:")
        print("  OS: " .. `uname -s`)
        print("  Architecture: " .. `uname -m`) 
        print("  Hostname: " .. `hostname`)
        print("  User: " .. $USER)
        print("  Uptime: " .. `uptime`)
        
    elseif cmd == "files" then
        print("Files in current directory:")
        files = `ls -la`
        print(files)
        
    elseif cmd == "env" then
        print("Key environment variables:")
        print("  USER: " .. $USER)
        print("  HOME: " .. $HOME)
        print("  SHELL: " .. $SHELL)
        print("  PATH: " .. `echo $PATH | cut -d: -f1-3`)
        
    elseif cmd == "network" then
        print("Network connectivity test:")
        hosts = {"google.com", "github.com"}
        for i = 1, #hosts do
            local host = hosts[i]
            local result = `ping -c 1 #{host} >/dev/null 2>&1 && echo "ok" || echo "fail"`
            local status = result == "ok" and "✓" or "✗"
            print("  " .. status .. " " .. host)
        end
        
    elseif cmd == "processes" then
        print("Top processes:")
        !ps aux | head -10
        
    elseif cmd == "disk" then
        print("Disk usage:")
        !df -h
        
    elseif cmd == "quit" or cmd == "exit" then
        return false
        
    else
        -- Try to execute as luash code
        if cmd ~= "" then
            print("Executing: " .. cmd)
            -- In a real REPL, we'd eval this
            -- For demo, just show some dynamic examples
            if cmd:match("^%$") then
                print("Environment variable assignment")
            elseif cmd:match("`.*`") then
                print("Shell command execution")  
            else
                print("Lua expression")
            end
        end
    end
    
    return true
end

-- Main interaction loop
print("Type 'help' for commands, 'quit' to exit")
print()

-- Simulate some interactive commands
commands = {
    "help",
    "sysinfo", 
    "files",
    "network",
    "quit"
}

for i = 1, #commands do
    local cmd = commands[i]
    print("luash> " .. cmd)
    
    if not process_command(cmd) then
        break
    end
    
    if i < #commands then
        print("\nPress Enter to continue...")
        io.read() -- Wait for user input
    end
end

print("\n✨ This shows how luash can build interactive applications!")
print("For a full REPL, we'd:")
print("  - Read input in a loop")
print("  - Parse and execute luash expressions")  
print("  - Handle multiline input")
print("  - Maintain command history")