import { pgTable, serial, text, timestamp, integer } from 'drizzle-orm/pg-core';

/**
 * The connection to the fofos server. One row, and the ONLY thing this plugin stores.
 *
 * ── Why there is nothing else here ──
 *
 * Every temptation to add a table to this file should be resisted, and it is worth writing down why
 * rather than relying on taste. fofos owns its own Postgres and its own media store; this plugin
 * reaches them over HTTP. If the client's collections and photographs lived here instead, they would
 * live under Officer's plugin installer — which drops a plugin's tables when the "delete its data"
 * checkbox is ticked.
 *
 * So the strongest thing that can be said about this plugin is a consequence of this file being one
 * table long: **no operation on it can destroy the client's work.** Deleting it removes a URL and a
 * token, and the site is untouched.
 *
 * A cache would be the thin end of it. If a panel ever needs one, it belongs in memory or in the
 * browser, not in a table that outlives the request.
 *
 * ── Why not core `service_connections` ──
 *
 * It fits the shape — `url`, an encrypted `secret` — but its `ServiceName` is a closed TypeScript
 * union, so using it means editing the platform to add a name, and a plugin should install into a
 * platform it did not have to change. The same reasoning `plugins/proxy-manager/db/schema.ts` gives,
 * and worth revisiting on the day that union opens.
 */
export const fofosAdminConnection = pgTable('fofos_admin_connection', {
  id: serial('id').primaryKey(),

  /** Where the fofos server is — the origin its API is served from. Normalised without a trailing slash. */
  url: text('url').notNull(),

  /**
   * fofos's `FOFOS_API_TOKEN`, encrypted with `encryptSecret('fofos-admin', …)` — its own purpose
   * key, so a leak of that one opens this column and nothing else.
   *
   * **Never returned across the API boundary**, at any level, to anybody, including the owner. A
   * settings form asking "is one set" gets a boolean.
   *
   * There is exactly one of these rather than one per user, and that is not laziness: fofos has a
   * single token and no notion of accounts. WHO is editing is a question Officer answers with its own
   * accounts and permissions, in front of this.
   */
  token: text('token').notNull(),

  /** From the last successful probe — which sections that server says it serves. Diagnostic only. */
  sections: text('sections').array(),

  lastProbeAt: timestamp('last_probe_at', { withTimezone: true }),
  /**
   * `integer` rather than `boolean` for the same reason proxy-manager uses one: three states, not
   * two. Null means never probed, which reads differently from probed-and-failed.
   */
  lastProbeOk: integer('last_probe_ok'),

  createdAt: timestamp('created_at', { withTimezone: true }).notNull().defaultNow(),
  updatedAt: timestamp('updated_at', { withTimezone: true }).notNull().defaultNow(),
});

export type FofosAdminConnection = typeof fofosAdminConnection.$inferSelect;

/**
 * Administration's own settings. One row, and nothing in it belongs to the client.
 *
 * ── Why a second table and not a column on the one above ──
 *
 * `fofos_admin_connection.url` and `.token` are both `notNull`, so a root path could not be saved
 * without also having an HTTP connection — and that connection is being replaced, not extended. When
 * it goes, its table is a clean `drop` rather than surgery on columns that outlived it.
 *
 * The rule at the top of this file still holds and this does not bend it: what is forbidden here is
 * the CLIENT'S WORK — collections, photographs, copy. This row holds a path and, later, how to read
 * fofos's own database. Deleting it loses a setting somebody can retype, never a thing they made.
 */
export const fofosAdminSettings = pgTable('fofos_admin_settings', {
  id: serial('id').primaryKey(),

  /**
   * Where the fofos site lives on this machine. ABSOLUTE, always.
   *
   * Never `~/fofos`. A tilde means "whoever is asking", and the people asking will not all be the same
   * person — this plugin is grantable, and a member reading this setting must see the one real
   * directory the site is in rather than a path that resolves to their own home and is not there.
   *
   * Null means never set, and the default is computed at read time rather than written here. See
   * `api/settings.ts` for why that is not the same as writing it once at install.
   */
  rootPath: text('root_path'),

  /**
   * The two Postgres databases the site uses, by NAME.
   *
   * Names and not URLs, deliberately. They live on the same instance Officer is already connected to —
   * that is the whole reason this is a name — so a URL here would be a second copy of a host, a port
   * and a credential that already exist in the platform's own configuration, able to drift from it and
   * able to point somewhere nobody intended.
   *
   * Null means not chosen yet. There is no default: a database name is not something to guess at, and
   * a wrong guess here is a site reading somebody else's tables.
   */
  dbProduction: text('db_production'),
  dbDevelopment: text('db_development'),

  /**
   * Backups: when, and where they land.
   *
   * A cron expression, because a backup wants to happen at an HOUR — "every day at three" — and an
   * interval measured from whenever somebody last pressed save drifts across the clock until it is
   * running at two in the afternoon. The panel offers the handful of schedules anybody wants, and the
   * expression is validated on the way in so a malformed one cannot be stored and then fail at a time
   * nobody is watching.
   *
   * Null in either means backups are not set up. Both are needed, so one without the other is not a
   * half-configured state to interpret — it is off.
   */
  backupCron: text('backup_cron'),

  /**
   * Where dumps are written on THIS machine, before they are sent anywhere.
   *
   * Null means the default, computed at read time from `OFFICER_ROOT` — the same reasoning as
   * `rootPath` above: a path written in at install freezes the layout of the machine it was installed
   * on, and a restore elsewhere then points at a directory that is not there while looking chosen.
   */
  backupDir: text('backup_dir'),

  /**
   * Where they are COPIED to. `user@host`, and an absolute path on it.
   *
   * A backup that only exists on the machine it came from is not a backup — it is a second copy on the
   * same disk, lost to the same failure. So the local directory is staging and this is the destination.
   *
   * Authenticated by the owner's existing SSH key, never a password: there is nobody at a terminal when
   * this runs, and a credential stored here would be one this plugin had to hold and could leak.
   */
  backupSshHost: text('backup_ssh_host'),
  backupSshPath: text('backup_ssh_path'),

  /**
   * How many dumps to keep, per database, in each place.
   *
   * Null means keep everything, which is a real choice and a bad default — a nightly dump of a small
   * site fills a disk slowly enough that nobody notices until something else fails.
   */
  backupKeep: integer('backup_keep'),

  /**
   * The ports the site's two servers listen on.
   *
   * Null means not chosen, and there is no default: a port is the one setting where a sensible-looking
   * guess is worst — it binds, the site appears to work, and it is quietly answering on something
   * another service wanted.
   */
  devPort: integer('dev_port'),
  prodPort: integer('prod_port'),

  /**
   * When the last one finished, which is what makes the schedule survive a restart.
   *
   * The timer does not measure elapsed time from when the process started; it asks whether a backup is
   * DUE, against this. A daily backup on a machine that restarts every few hours would otherwise never
   * fire once — the interval would be reset before it ever elapsed, and nothing would look wrong.
   */
  lastBackupAt: timestamp('last_backup_at', { withTimezone: true }),

  createdAt: timestamp('created_at', { withTimezone: true }).notNull().defaultNow(),
  updatedAt: timestamp('updated_at', { withTimezone: true }).notNull().defaultNow(),
});

export type FofosAdminSettings = typeof fofosAdminSettings.$inferSelect;