#!/usr/bin/env luash
-- REPL Demo: Showcasing interactive features

print("🎮 Luash Interactive Shell Demo")
print("===============================\n")

print("Luash now supports a full interactive REPL!")
print("Start it with: ./luash -i")
print()

print("🔥 REPL Features:")
print("✓ All luash preprocessing ($VAR, `commands`, #{interpolation})")
print("✓ Multiline input (functions, loops, if blocks)")
print("✓ Command history")
print("✓ Special dot commands (.help, .exit, .clear, .history)")
print("✓ Real-time expression evaluation")
print()

print("📝 Example REPL Session:")
examples = {
    'print("Hello " .. $USER)',
    '$GREETING = "Hello from REPL"',
    'files = `ls *.luash | wc -l`',
    'print("Found " .. files .. " luash files")',
    'host = "google.com"',
    'status = `ping -c 1 #{host} >/dev/null && echo "ok"`',
    'print(host .. " is " .. status)',
    '',
    '-- Multiline example:',
    'for i = 1, 3 do',
    '  print("Iteration: " .. i)',
    'end',
    '',
    '-- Function definition:',
    'function greet(name)',
    '  return "Hello, " .. name .. "!"',
    'end',
    '',
    'print(greet($USER))'
}

for i, example in ipairs(examples) do
    if example == "" then
        print()
    elseif example:match("^%-%-") then
        print(example)
    else
        print("luash> " .. example)
    end
end

print()
print("🚀 Try it now: ./luash -i")
print("   Or: ./luash --interactive")
print()

print("💡 The REPL supports:")
print("   • Environment variables: $HOME, $USER, etc.")
print("   • Shell commands: `ls`, `pwd`, `date`")
print("   • Variable interpolation: `echo #{variable}`") 
print("   • Interactive commands: !git status")
print("   • Full Lua: functions, loops, tables, etc.")
print("   • Command history and editing")
print()

print("✨ Perfect for:")
print("   • Interactive system administration")
print("   • Exploring file systems and processes")
print("   • Quick shell command prototyping")
print("   • Learning luash syntax")
print("   • Debugging shell scripts")