package workspace

import (
	"context"
	"fmt"
	"os"

	"git.michelsen.id/phill/chron/chron-note/internal/domain"
)

type SnapshotObject struct {
	ID    domain.ObjectID
	Size  int64
	ModNS int64
}

func (ws *Workspace) Snapshot(ctx context.Context) ([]SnapshotObject, error) {
	entries, err := os.ReadDir(ws.Dir)
	if err != nil {
		return nil, fmt.Errorf("readdir workspace dir: %w", err)
	}

	out := make([]SnapshotObject, 0, len(entries))
	for _, e := range entries {
		if ctx.Err() != nil {
			return nil, ctx.Err()
		}
		if e.IsDir() {
			continue
		}
		info, err := e.Info()
		if err != nil {
			return nil, fmt.Errorf("stat workspace entry: %w", err)
		}
		if !info.Mode().IsRegular() {
			continue
		}

		id, err := domain.ParseObjectID(e.Name())
		if err != nil {
			continue
		}

		out = append(out, SnapshotObject{
			ID:    id,
			Size:  info.Size(),
			ModNS: info.ModTime().UnixNano(),
		})
	}

	return out, nil
}