package main

import (
	"fmt"
	"os"
	"path/filepath"
	"strings"
)

// applyNewModifications handles `t:new` type patches
func applyNewModifications(targetFilePath string, modifications []string) error {
	// Ensure the directory structure exists
	dir := filepath.Dir(targetFilePath)
	if err := os.MkdirAll(dir, os.ModePerm); err != nil {
		return fmt.Errorf("failed to create directories for target file: %v", err)
	}

	// Check if the file exists
	if _, err := os.Stat(targetFilePath); err == nil {
		// File exists, delete it
		if err := os.Remove(targetFilePath); err != nil {
			return fmt.Errorf("failed to delete existing target file: %v", err)
		}
	}

	// Create a new file and apply modifications
	tempFile, err := os.Create(targetFilePath)
	if err != nil {
		return fmt.Errorf("failed to create target file: %v", err)
	}
	defer tempFile.Close()

	// Write new modifications
	for _, mod := range modifications {
		if strings.HasPrefix(mod, "+") {
			newLine := strings.TrimPrefix(mod, "+")
			if _, err := tempFile.WriteString(newLine + "\n"); err != nil {
				return fmt.Errorf("failed to write new content to target file: %v", err)
			}
		}
	}

	return nil
}