// readcache/constants.ts - constants for read_file caching layer

export const RP_READCACHE_META_VERSION = 1 as const;
export const RP_READCACHE_CUSTOM_TYPE = "repoprompt-mcp-readcache" as const;

export const SCOPE_FULL = "full" as const;

export const MAX_DIFF_FILE_BYTES = 2 * 1024 * 1024;
export const MAX_DIFF_FILE_LINES = 12_000;
export const MAX_DIFF_TO_BASE_RATIO = 0.9;
export const MAX_DIFF_TO_BASE_LINE_RATIO = 0.85;

export const DEFAULT_EXCLUDED_PATH_PATTERNS = [
  ".env*",
  "*.pem",
  "*.key",
  "*.p12",
  "*.pfx",
  "*.crt",
  "*.cer",
  "*.der",
  "*.pk8",
  "id_rsa",
  "id_ed25519",
  ".npmrc",
  ".netrc",
] as const;

// NOTE: we intentionally share the same on-disk object store layout as pi-readcache
// (content-addressed sha256 snapshots). This avoids duplicating storage when both are installed
export const READCACHE_ROOT_DIR = ".pi/readcache";
export const READCACHE_OBJECTS_DIR = `${READCACHE_ROOT_DIR}/objects`;
export const READCACHE_TMP_DIR = `${READCACHE_ROOT_DIR}/tmp`;

export const READCACHE_OBJECT_MAX_AGE_MS = 24 * 60 * 60 * 1000;

export function scopeRange(start: number, end: number): `r:${number}:${number}` {
  return `r:${start}:${end}`;
}