export const SERVERS_TABLE = "openpds_servers";
export const METADATA_TABLE = "openpds_metadata";

export const STATE_JSON_URL =
  "https://raw.githubusercontent.com/mary-ext/atproto-scraping/trunk/state.json";

export const ENRICHMENT_BATCH_SIZE = 75;
export const PDS_REQUEST_TIMEOUT_MS = 5000;
export const DNS_CACHE_TTL_DAYS = 7;
export const GEO_CACHE_TTL_DAYS = 30;

/** Configuration for a known PDS software implementation */
export type PdsSoftwareConfig = {
  id: string;
  displayName: string;
  projectUrl: string;
  /** If set, enables version tracking via GitHub tags */
  githubOwner?: string;
  githubRepo?: string;
  /** Extract a version string from a GitHub tag name, or null if not a valid tag */
  parseVersion?: (tag: string) => string | null;
};

/** Registry of known PDS software implementations */
export const PDS_SOFTWARE_REGISTRY: PdsSoftwareConfig[] = [
  {
    id: "bluesky-pds",
    displayName: "Bluesky PDS",
    projectUrl: "https://github.com/bluesky-social/pds",
    githubOwner: "bluesky-social",
    githubRepo: "pds",
    parseVersion: (tag) => {
      const m = tag.match(/^v(\d+\.\d+\.\d+)$/);
      return m ? m[1] : null;
    },
  },
  {
    id: "millipds",
    displayName: "millipds",
    projectUrl: "https://github.com/DavidBuchanan314/millipds",
    githubOwner: "DavidBuchanan314",
    githubRepo: "millipds",
    parseVersion: (tag) => {
      const m = tag.match(/^v(\d+\.\d+\.\d+)$/);
      return m ? m[1] : null;
    },
  },
  {
    id: "cirrus",
    displayName: "Cirrus",
    projectUrl: "https://github.com/ascorbic/cirrus",
    githubOwner: "ascorbic",
    githubRepo: "cirrus",
    parseVersion: (tag) => {
      const m = tag.match(/^@getcirrus\/pds@(\d+\.\d+\.\d+)$/);
      return m ? m[1] : null;
    },
  },
  {
    id: "cocoon",
    displayName: "Cocoon",
    projectUrl: "https://github.com/haileyok/cocoon",
    githubOwner: "haileyok",
    githubRepo: "cocoon",
    parseVersion: (tag) => {
      const m = tag.match(/^v(\d+\.\d+\.\d+)$/);
      return m ? m[1] : null;
    },
  },
  // Link-only software (no version tracking)
  {
    id: "tranquil",
    displayName: "Tranquil",
    projectUrl: "https://tangled.org/tranquil.farm/tranquil-pds",
  },
  {
    id: "hexpds",
    displayName: "hexpds",
    projectUrl: "https://github.com/ovnanova/hexpds",
  },
  {
    id: "bluepds",
    displayName: "bluepds",
    projectUrl: "https://github.com/DrChat/bluepds",
  },
  {
    id: "rsky",
    displayName: "rsky",
    projectUrl: "https://github.com/blacksky-algorithms/rsky",
  },
  {
    id: "picopds",
    displayName: "picopds",
    projectUrl: "https://github.com/DavidBuchanan314/picopds",
  },
];

/** Look up a software config by its ID */
export function getSoftwareConfig(
  id: string,
): PdsSoftwareConfig | undefined {
  return PDS_SOFTWARE_REGISTRY.find((s) => s.id === id);
}

/** Return only software entries that have GitHub version tracking */
export function getTrackedSoftware(): PdsSoftwareConfig[] {
  return PDS_SOFTWARE_REGISTRY.filter(
    (s) => s.githubOwner && s.githubRepo && s.parseVersion,
  );
}

/** Country code to flag emoji */
export function countryFlag(code: string): string {
  return [...code.toUpperCase()]
    .map((c) => String.fromCodePoint(0x1f1e6 - 65 + c.charCodeAt(0)))
    .join("");
}