package runner

import (
	"compress/gzip"
	"errors"
	"git.0x7f.app/WOJ/woj-server/internal/e"
	"git.0x7f.app/WOJ/woj-server/pkg/file"
	"git.0x7f.app/WOJ/woj-server/pkg/utils"
	"github.com/containerd/containerd"
	"go.uber.org/zap"
	"os"
	"path/filepath"
)

type depConfig struct {
	tarball string
	image   string
}

func (s *service) LoadImageFromTarball(path string) error {
	if !file.Exist(path) {
		return errors.New("tarball not exists")
	}

	f, err := os.Open(path)
	if err != nil {
		return err
	}
	defer func(f *os.File) {
		_ = f.Close()
	}(f)

	g, err := gzip.NewReader(f)
	if err != nil {
		return err
	}
	defer func(g *gzip.Reader) {
		_ = g.Close()
	}(g)

	_, err = s.container.client.Import(s.container.ctx, g)
	return err
}

func (s *service) LoadImageFromRegistry(image string) error {
	_, err := s.container.client.Pull(s.container.ctx, image, containerd.WithPullUnpack)
	return err
}

func (s *service) LoadImage(cfg *depConfig) e.Status {
	err := utils.NewTryErr().
		Try(func() error { return s.LoadImageFromTarball(cfg.tarball) }).
		Or(func() error { return s.LoadImageFromRegistry(cfg.image) }).
		Done()

	if err != nil {
		s.log.Warn("[deps] load image failed", zap.Error(err))
		return e.RunnerDepsBuildFailed
	}

	return e.Success
}

func (s *service) EnsureDeps() e.Status {
	// full
	fullImage := &depConfig{
		tarball: filepath.Join(TmpDir, "ubuntu-full.tar.gz"),
		image:   ContainerImageFull,
	}
	if s.LoadImage(fullImage) != e.Success {
		return e.RunnerDepsBuildFailed
	}

	// tiny
	tinyImage := &depConfig{
		tarball: filepath.Join(TmpDir, "ubuntu-tiny.tar.gz"),
		image:   ContainerImageRun,
	}
	if s.LoadImage(tinyImage) != e.Success {
		return e.RunnerDepsBuildFailed
	}

	return e.Success
}