package cache

import (
	"os"
	"path/filepath"
	"strings"
	"time"
)

const (
	CacheFile = "cache.db"
	CacheTTL  = 24 * time.Hour
)

type Entry[T any] struct {
	URI   string `json:"uri"`
	CID   string `json:"cid"`
	Value T      `json:"value"`
}

func recordsBucket(did string) string {
	return "records:" + did
}

func processedBucket(did string) string {
	return "processed:" + did
}

func failedBucket(did string) string {
	return "failed:" + did
}

func metaBucket() string {
	return "_meta"
}

const metaPrefixTimestamp = "ts:"

func cacheDir() (string, error) {
	if dir := os.Getenv("LAZULI_CACHE_DIR"); dir != "" {
		return dir, nil
	}

	for _, arg := range os.Args {
		if strings.HasPrefix(arg, "-test.") {
			dir, err := os.MkdirTemp("", "lazuli-test-*")
			if err != nil {
				return "", err
			}
			os.Setenv("LAZULI_CACHE_DIR", dir)
			return dir, nil
		}
	}

	cacheDir, err := os.UserCacheDir()
	if err != nil {
		return "", err
	}
	return filepath.Join(cacheDir, "lazuli"), nil
}