-- Router-lists local storage (SQLite). EvoBGP holds reference lists; this DB holds config + caches.

CREATE TABLE IF NOT EXISTS app_meta (
  key   TEXT PRIMARY KEY,
  value TEXT NOT NULL
);

CREATE TABLE IF NOT EXISTS schema_migrations (
  id          INTEGER PRIMARY KEY AUTOINCREMENT,
  version     INTEGER NOT NULL UNIQUE,
  applied_at  INTEGER NOT NULL
);

CREATE TABLE IF NOT EXISTS blobs (
  object_key     TEXT PRIMARY KEY,
  namespace      TEXT NOT NULL CHECK (namespace IN (
    'config',
    'derived',
    'per_server',
    'cache'
  )),
  content_type   TEXT NOT NULL DEFAULT 'application/octet-stream',
  body           BLOB NOT NULL,
  byte_size      INTEGER NOT NULL,
  etag           TEXT NOT NULL,
  updated_at     INTEGER NOT NULL,
  created_at     INTEGER NOT NULL
);

CREATE INDEX IF NOT EXISTS idx_blobs_namespace_updated
  ON blobs (namespace, updated_at DESC);

CREATE INDEX IF NOT EXISTS idx_blobs_prefix
  ON blobs (object_key);

CREATE TABLE IF NOT EXISTS blob_versions (
  id           INTEGER PRIMARY KEY AUTOINCREMENT,
  object_key   TEXT NOT NULL,
  body         BLOB NOT NULL,
  byte_size    INTEGER NOT NULL,
  etag         TEXT,
  created_at   INTEGER NOT NULL,
  FOREIGN KEY (object_key) REFERENCES blobs(object_key) ON DELETE CASCADE
);

CREATE INDEX IF NOT EXISTS idx_blob_versions_key_time
  ON blob_versions (object_key, created_at DESC);

CREATE TABLE IF NOT EXISTS versioned_keys (
  object_key TEXT PRIMARY KEY
);

INSERT OR IGNORE INTO versioned_keys (object_key) VALUES
  ('filters.json'),
  ('servers.json');

CREATE TABLE IF NOT EXISTS cache_entries (
  cache_key    TEXT PRIMARY KEY,
  namespace    TEXT NOT NULL DEFAULT 'cache',
  body         BLOB NOT NULL,
  byte_size    INTEGER NOT NULL,
  etag         TEXT,
  updated_at   INTEGER NOT NULL,
  expires_at   INTEGER
);

CREATE INDEX IF NOT EXISTS idx_cache_expires
  ON cache_entries (expires_at);