package configurebaseline

import (
	"encoding/json"
	"io/fs"
	"path"
	"path/filepath"

	"github.com/github/codeql-go/extractor/util"
)

type BaselineConfig struct {
	PathsIgnore []string `json:"paths-ignore"`
}

func GetConfigBaselineAsJSON(rootDir string) ([]byte, error) {
	vendorDirs := make([]string, 0)

	extractVendorDirs, _ := util.IsVendorDirExtractionEnabled()
	if extractVendorDirs {
		// The user wants vendor directories scanned; emit an empty report.
	} else {
		filepath.WalkDir(rootDir, func(dirPath string, d fs.DirEntry, err error) error {
			if err != nil {
				// Ignore any unreadable paths -- if this script can't see it, very likely
				// it will not be extracted either.
				return nil
			}
			if util.IsGolangVendorDirectory(dirPath) {
				// Note that CodeQL expects a forward-slash-separated path, even on Windows.
				vendorDirs = append(vendorDirs, path.Join(filepath.ToSlash(dirPath), "**"))
				return filepath.SkipDir
			} else {
				return nil
			}
		})
	}

	outputStruct := BaselineConfig{PathsIgnore: vendorDirs}
	return json.Marshal(outputStruct)
}