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 Linkwarden. Officer stores no bookmarks: Linkwarden owns
// those. What lives here is WHERE the instance is, and WHO on this Officer is who on that Linkwarden.
// Every secret column is AES-256-GCM encrypted at rest (officerdb/crypto).

/**
 * Where this install's Linkwarden lives. ONE ROW, ever — `id` is pinned to 1 by a CHECK.
 *
 * The reasoning is Vault's, and it is worth not re-deriving: a plugin cannot ask the owner to edit `.env`
 * 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.
 *
 * Server-wide rather than per-user because the owner runs one Linkwarden. That is a different question
 * from which ACCOUNT a person uses on it, which is the table below — and the thing Vault explicitly left
 * for later.
 */
export const linkwardenConfig = pgTable(
  'linkwarden_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. */
    url: text('url'),
    /**
     * The admin access token, used ONLY to provision accounts — `plugins/USER_PROVISIONING.md`.
     *
     * Separate from any user's token and never injected on a user's request: this one can list and create
     * accounts, so it is reachable from exactly one place (`api/accounts.ts`, owner-only) and is not what
     * the proxy holds.
     */
    adminToken: text('admin_token'), // 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_linkwarden_config_singleton', sql`${table.id} = 1`)],
);

/**
 * Who an Officer account is on that Linkwarden.
 *
 * ── Why a mapping and not one shared login ──
 *
 * Linkwarden has its own users, its own collections and its own sharing. One account shared between
 * everyone on an Officer 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.
 *
 * This is the part Vault does not have. Its schema says so in as many words — "mapping Officer accounts
 * onto them is not a column here" — so this is new work rather than a copy, and the contract it follows
 * is `plugins/USER_PROVISIONING.md`: check before create, force a password change, verify by logging in.
 *
 * ── The token is the whole point ──
 *
 * With it, a proxied request carries the mapped user's own credential and Linkwarden 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.
 */
export const linkwardenAccounts = pgTable(
  'linkwarden_accounts',
  {
    userId: integer('user_id')
      .primaryKey()
      .references(() => users.id, { onDelete: 'cascade' }),
    /** The id Linkwarden knows them by. Kept so a rename on either side cannot break the mapping. */
    linkwardenUserId: integer('linkwarden_user_id').notNull(),
    /** Their username there, for showing in the panel — the id is what anything reads. */
    username: text('username').notNull(),
    /**
     * That account's own access token, minted at provisioning.
     *
     * Null is a real state and not an error: an account can exist before a token has been issued for it,
     * and the panel says so rather than looking broken.
     */
    accessToken: text('access_token'), // encrypted
    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 Linkwarden account is a mistake, but it is the OWNER's mistake
      to make and un-make: a unique index turns it into a failed insert with no explanation at the moment
      of provisioning, and the m3e-canvas review this week is a fresh reminder of what a constraint chosen
      for tidiness does to the ordinary path. `api/accounts.ts` checks and refuses with a sentence.
    */
    index('linkwarden_accounts_by_linkwarden_user').on(table.linkwardenUserId),
  ],
);