package cli

import (
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestServeCommand(t *testing.T) {
	// Test that the serve command exists and is properly configured
	assert.NotNil(t, serveCmd)
	assert.Equal(t, "serve", serveCmd.Use)
	assert.Equal(t, "Launches the headscale server", serveCmd.Short)
	assert.NotNil(t, serveCmd.Run)
	assert.NotNil(t, serveCmd.Args)
}

func TestServeCommandInRootCommand(t *testing.T) {
	// Test that serve is available as a subcommand of root
	cmd, _, err := rootCmd.Find([]string{"serve"})
	require.NoError(t, err)
	assert.Equal(t, "serve", cmd.Name())
	assert.Equal(t, serveCmd, cmd)
}

func TestServeCommandArgs(t *testing.T) {
	// Test that the Args function is defined and accepts any arguments
	// The current implementation always returns nil (accepts any args)
	assert.NotNil(t, serveCmd.Args)
	
	// Test the args function directly
	err := serveCmd.Args(serveCmd, []string{})
	assert.NoError(t, err, "Args function should accept empty arguments")
	
	err = serveCmd.Args(serveCmd, []string{"extra", "args"})
	assert.NoError(t, err, "Args function should accept extra arguments")
}

func TestServeCommandHelp(t *testing.T) {
	// Test that the command has proper help text
	assert.NotEmpty(t, serveCmd.Short)
	assert.Contains(t, serveCmd.Short, "server")
	assert.Contains(t, serveCmd.Short, "headscale")
}

func TestServeCommandStructure(t *testing.T) {
	// Test basic command structure
	assert.Equal(t, "serve", serveCmd.Name())
	assert.Equal(t, "Launches the headscale server", serveCmd.Short)
	
	// Test that it has no subcommands (it's a leaf command)
	subcommands := serveCmd.Commands()
	assert.Empty(t, subcommands, "Serve command should not have subcommands")
}

// Note: We can't easily test the actual execution of serve because:
// 1. It depends on configuration files being present and valid
// 2. It calls log.Fatal() which would exit the test process
// 3. It tries to start an actual HTTP server which would block forever
// 4. It requires database connections and other infrastructure
//
// In a real refactor, we would:
// 1. Extract server initialization logic to a testable function
// 2. Use dependency injection for configuration and dependencies
// 3. Return errors instead of calling log.Fatal()
// 4. Add graceful shutdown capabilities for testing
// 5. Allow server startup to be cancelled via context
//
// For now, we test the command structure and basic properties.