import { pgTable, integer, text, timestamp, boolean, check, index } from 'drizzle-orm/pg-core';
import { sql } from 'drizzle-orm';
import { users } from 'officerdb/auth/schema';

// Officer's server-side state for a self-hosted Karakeep. Officer stores no bookmarks: Karakeep owns
// those. What lives here is WHERE the instance is, and WHO on this Officer is who on that Karakeep.
// Every secret column is AES-256-GCM encrypted at rest (officerdb/crypto).

/**
 * Where this install's Karakeep lives. ONE ROW, ever — `id` is pinned to 1 by a CHECK.
 *
 * A table rather than an env var, for the reasons Vault's schema sets out: a plugin cannot ask the owner
 * to edit a file and restart a process, `.env` is auto-loaded into every pm2 process so a value one
 * sidecar needs is readable from every other one, and a variable read at module load cannot change
 * without a restart. Installing the plugin and pointing it at a server has to be enough.
 */
export const karakeepConfig = pgTable(
  'karakeep_config',
  {
    /** Always 1. A single-row table wants to say so structurally, or a second row arrives eventually. */
    id: integer('id').primaryKey().default(1),
    /**
     * Base URL, no trailing slash (normalised on write). Null before the owner has pointed it anywhere.
     *
     * ── The address the SIDECAR dials, which is not the one clients are told ──
     *
     * They come apart whenever Officer and the upstream share a host, and on this install they do. A
     * browser elsewhere resolves the machine's name over the tailnet; ON that machine the same name
     * resolves to 127.0.1.1, where nothing is bound. Measured during the Linkwarden build: the advertised
     * name answered from every host except the one the sidecar runs on.
     *
     * So this holds the loopback address. What a client is told is a separate question, and with Karakeep
     * a much smaller one — its API key is host-agnostic, so there is no third value to keep in step the
     * way `NEXTAUTH_URL` had to be.
     */
    url: text('url'),
    /**
     * An admin API key, used ONLY to provision accounts — `plugins/USER_PROVISIONING.md`.
     *
     * Separate from any user's key and never injected on a user's request: this one can list and delete
     * accounts, so it is reachable from exactly one place (`api/accounts.ts`, owner-only) and is not what
     * the proxy holds.
     */
    adminApiKey: text('admin_api_key'), // encrypted
    /**
     * Whether to serve at all. Distinct from `url` being set: the owner may want to stop exposing an
     * instance without forgetting where it is.
     */
    enabled: boolean('enabled').notNull().default(true),
    updatedAt: timestamp('updated_at', { withTimezone: true }).notNull().defaultNow(),
  },
  (table) => [check('ck_karakeep_config_singleton', sql`${table.id} = 1`)],
);

/**
 * Who an Officer account is on that Karakeep.
 *
 * ── Why a mapping and not one shared login ──
 *
 * Karakeep has its own users, lists and sharing. One account shared between everyone would put every
 * member's reading in one pile with no way to unpick it, and would make "revoke this person" mean
 * "change the password for everybody". A row per user is what makes a member's bookmarks theirs, and
 * removing them a delete rather than a negotiation.
 *
 * ── The key is the whole point ──
 *
 * With it, a proxied request carries the mapped user's own credential and Karakeep decides what they may
 * see. Without it the platform would have to be the thing that decides, which is a permission model
 * re-implemented on top of one that already exists and is already right.
 *
 * Unlike the Linkwarden attempt, nothing here has to be pasted by hand: `apiKeys.exchange` is a public
 * procedure that turns a username and password into a key, so Officer creates the account, chooses the
 * password, and mints the key itself.
 */
export const karakeepAccounts = pgTable(
  'karakeep_accounts',
  {
    userId: integer('user_id')
      .primaryKey()
      .references(() => users.id, { onDelete: 'cascade' }),
    /** The id Karakeep knows them by. Kept so a rename on either side cannot break the mapping. */
    karakeepUserId: text('karakeep_user_id').notNull(),
    /** What they log in as there — Karakeep identifies users by email. */
    email: text('email').notNull(),
    /**
     * That account's own API key.
     *
     * Null is a real state and not an error: an account can exist before a key has been minted for it,
     * and the panel says so rather than looking broken.
     */
    apiKey: text('api_key'), // encrypted
    /** Karakeep's own id for the key, so revoking it later does not mean guessing which one. */
    apiKeyId: text('api_key_id'),
    createdAt: timestamp('created_at', { withTimezone: true }).notNull().defaultNow(),
    updatedAt: timestamp('updated_at', { withTimezone: true }).notNull().defaultNow(),
  },
  (table) => [
    /*
      Ordinary, NOT unique.

      Two Officer accounts pointing at one Karakeep account is a mistake, but it is the owner's to make
      and un-make. A unique index turns it into a failed insert with no explanation at the moment of
      provisioning; `api/accounts.ts` checks and refuses with a sentence instead.
    */
    index('karakeep_accounts_by_karakeep_user').on(table.karakeepUserId),
  ],
);