class ClaudeCodeSlashCommands::Installer

def confirm_overwrite(filename)
  print "❓ #{filename} already exists. Overwrite? (y/N): "
  response = $stdin.gets.chomp.downcase
  response == "y" || response == "yes"
end

def ensure_target_directory
  FileUtils.mkdir_p(@commands_target)
end

def fetch_commands_from_github
  stdout, stderr, status = Open3.capture3("gh", "api", "repos/#{@repo}/contents/commands")
  unless status.success?
    raise "Failed to fetch commands from GitHub: #{stderr}"
  end
  contents = JSON.parse(stdout)
  contents.select { |item| item["type"] == "file" && item["name"].end_with?(".md") }
end

def fetch_commands_from_local
  return [] unless @commands_source.exist?
  @commands_source.glob("*.md").select(&:file?)
end

def initialize(commands_source: nil, commands_target: nil, repo: nil, local: false)
  @gem_root = Pathname.new(__dir__).parent.parent
  @commands_source = commands_source || @gem_root.join("commands")
  @commands_target = commands_target || Pathname.new(Dir.home).join(".claude", "commands")
  @repo = repo || "andyw8/claude_code_slash_commands"
  @local = local
end

def install
  ensure_target_directory
  if @local
    commands = fetch_commands_from_local
    if commands.empty?
      puts "❌ No command files found in local commands/ directory"
      return
    end
    commands.each do |command_file|
      install_command_from_local(command_file)
    end
  else
    commands = fetch_commands_from_github
    if commands.empty?
      puts "❌ No command files found to install"
      return
    end
    commands.each do |command|
      install_command_from_github(command)
    end
  end
  puts "✅ Installation complete!"
rescue => e
  puts "❌ Installation failed: #{e.message}"
  exit(1)
end

def install_command_from_github(command)
  filename = command["name"]
  target_file = @commands_target.join(filename)
  # Fetch the content of the command file
  stdout, stderr, status = Open3.capture3(
    "gh",
    "api",
    "repos/#{@repo}/contents/" + command["path"],
    "--jq",
    ".content"
  )
  unless status.success?
    raise "Failed to fetch command content for #{filename}: #{stderr}"
  end
  content = Base64.decode64(stdout)
  if target_file.exist?
    if target_file.read == content
      puts "⏭️  #{filename} already exists and is identical"
      return
    end
    unless confirm_overwrite(filename)
      puts "⏭️  Skipping #{filename}"
      return
    end
  end
  target_file.write(content)
  puts "📄 Installed #{filename}"
end

def install_command_from_local(command_file)
  filename = command_file.basename.to_s
  target_file = @commands_target.join(filename)
  content = command_file.read
  if target_file.exist?
    if target_file.read == content
      puts "⏭️  #{filename} already exists and is identical"
      return
    end
    unless confirm_overwrite(filename)
      puts "⏭️  Skipping #{filename}"
      return
    end
  end
  target_file.write(content)
  puts "📄 Installed #{filename}"
end