package io

import (
	"fmt"
	"log"
	"os"

	"gitlab.com/urkob/go-cert-gen/pkg/io"
)

type writer struct {
	dirPath string
}

// WriteFile writes file into `w writer` directory.
// Returns outputPath and error
func (w writer) WriteFile(filename string, data []byte) (string, error) {
	if filename == "" {
		return "", fmt.Errorf("filename cannot be empty")
	}
	if w.dirPath == "" {
		return "", fmt.Errorf("export directory cannot be empty")
	}
	if err := os.MkdirAll(w.dirPath, 0o755); err != nil {
		return "", err
	}

	log.Println("to write file")
	outputPath := w.dirPath + "/" + filename
	if err := os.WriteFile(outputPath, data, 0o600); err != nil {
		return "", err
	}
	log.Println("file written")
	return outputPath, nil
}

func NewWriter(dirPath string) io.WriterIface {
	return newWriter(dirPath)
}

func newWriter(dirPath string) *writer {
	return &writer{
		dirPath: dirPath,
	}
}