package generator

import (
	"bytes"
	"io"
	"io/ioutil"

	"gopkg.in/yaml.v2"
)

// Vendor generates regex matchers in Go for vendoring files/dirs.
// It is of generator.File type.
func Vendor(fileToParse, samplesDir, outPath, tmplPath, tmplName, commit string) error {
	data, err := ioutil.ReadFile(fileToParse)
	if err != nil {
		return err
	}

	var regexpList []string
	if err := yaml.Unmarshal(data, &regexpList); err != nil {
		return nil
	}

	buf := &bytes.Buffer{}
	if err := executeVendorTemplate(buf, regexpList, tmplPath, tmplName, commit); err != nil {
		return nil
	}

	return formatedWrite(outPath, buf.Bytes())
}

func executeVendorTemplate(out io.Writer, regexpList []string, tmplPath, tmplName, commit string) error {
	return executeTemplate(out, tmplName, tmplPath, commit, nil, regexpList)
}