package build

import (
	"crypto/sha256"
	"fmt"
	"os"
	"strings"

	"github.com/qiniu/goc/v2/pkg/config"
	"github.com/qiniu/goc/v2/pkg/log"
	"github.com/tongjingran/copy"
)

// copyProjectToTmp copies project files to the temporary directory
//
// It will ignore .git and irregular files, only copy source(text) files
func (b *Build) copyProjectToTmp() {
	curProject := config.GocConfig.CurModProjectDir
	tmpProject := config.GocConfig.TmpModProjectDir

	if _, err := os.Stat(tmpProject); !os.IsNotExist(err) {
		log.Infof("find previous temporary directory, delete")
		err := os.RemoveAll(tmpProject)
		if err != nil {
			log.Fatalf("fail to remove preivous temporary directory: %v", err)
		}
	}

	log.StartWait("coping project")
	err := os.MkdirAll(tmpProject, os.ModePerm)
	if err != nil {
		log.Fatalf("fail to create temporary directory: %v", err)
	}

	// copy
	if err := copy.Copy(curProject, tmpProject, copy.Options{Skip: skipCopy}); err != nil {
		log.Fatalf("fail to copy the folder from %v to %v, the err: %v", curProject, tmpProject, err)
	}

	log.StopWait()
}

// tmpFolderName generates a directory name according to the path
func tmpFolderName(path string) string {
	sum := sha256.Sum256([]byte(path))
	h := fmt.Sprintf("%x", sum[:6])

	return "goc-build-" + h
}

// skipCopy skip copy .git dir and irregular files
func skipCopy(src string, info os.FileInfo) (bool, error) {
	irregularModeType := os.ModeNamedPipe | os.ModeSocket | os.ModeDevice | os.ModeCharDevice | os.ModeIrregular
	if strings.HasSuffix(src, "/.git") {
		log.Debugf("skip .git dir [%s]", src)
		return true, nil
	}
	if info.Mode()&irregularModeType != 0 {
		log.Debugf("skip file [%s], the file mode is [%s]", src, info.Mode().String())
		return true, nil
	}
	return false, nil
}

// clean clears the temporary project
func (b *Build) clean() {
	if config.GocConfig.Debug != true {
		if err := os.RemoveAll(config.GocConfig.TmpModProjectDir); err != nil {
			log.Fatalf("fail to delete the temporary project: %v", config.GocConfig.TmpModProjectDir)
		}
		log.Donef("delete the temporary project")
	} else {
		log.Debugf("--debug is enabled, keep the temporary project")
	}
}