package config

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

func FileExists(path string) bool {
	if _, err := os.Stat(path); os.IsNotExist(err) {
		return false
	}
	return true
}

func ReadFile(path string) ([]byte, error) {
	var output []byte
	if !FileExists(path) {
		return []byte{}, fmt.Errorf("Unable to read file, file does not exist: %s", path)
	}

	output, err := os.ReadFile(path)
	if err != nil {
		return []byte{}, fmt.Errorf("Unable to read file, %v: %s", err, path)
	}
	return output, nil
}

func WriteFile(path string, data []byte) (int, error) {
	dir := filepath.Dir(path)

	if err := os.MkdirAll(dir, 0755); err != nil {
		return 0, fmt.Errorf("Unable to create parent directory, %v: %s", err, dir)
	}

	fh, err := os.Create(path)
	if err != nil {
		return 0, fmt.Errorf("Unable to open file for writing, %v: %s", err, path)
	}
	defer fh.Close()

	bs, err := fh.Write(data)
	if err != nil {
		return 0, fmt.Errorf("Unable to write file, %v: %s", err, path)
	}

	if err := fh.Sync(); err != nil {
		return 0, fmt.Errorf("Unable to sync file to disk, %v: %s", err, path)
	}

	return bs, nil
}