import { sql } from "drizzle-orm";
import { check, pgTable, text, timestamp } from "drizzle-orm/pg-core";
import { ekklesiaCoreUser } from "../identity/schema.js";

/**
 * Core-owned storage for a person's own preferences (ADR 0062).
 *
 * **One row per person, one typed column per preference.** There is deliberately no key/value
 * table and no JSON column: each preference has a fixed name and a closed set of values, enforced
 * here by a `CHECK` constraint beneath the application-layer parser
 * (`parseAccountPreferencesUpdate`), so nothing but a known value can be stored. A new preference is
 * a new nullable column in a new migration.
 *
 * **`null` means "never chosen"**, and is resolved to the platform default when read
 * (`resolveAccountPreferences`) rather than written as a column default. That keeps "this person
 * chose System" distinguishable from "this person never chose", and lets a later preference column
 * arrive without backfilling a value nobody chose — the same reasoning
 * `ekklesia_core_module_state` follows for its absent rows (ADR 0028). A person with no row at all
 * has chosen nothing.
 *
 * The row belongs to its person: `user_id` is the primary key and cascades on delete, so deleting
 * an account removes its preferences with it, and no row can exist for a person who does not.
 *
 * Personal, not church-wide. Nothing here is branding, a church theme, or an administrator's
 * decision for anyone else; those are Settings' (ADR 0061).
 */
export const ekklesiaCoreUserPreference = pgTable(
  "ekklesia_core_user_preference",
  {
    userId: text("user_id")
      .primaryKey()
      .references(() => ekklesiaCoreUser.id, { onDelete: "cascade" }),
    appearance: text("appearance"),
    motion: text("motion"),
    createdAt: timestamp("created_at", { withTimezone: true }).defaultNow().notNull(),
    updatedAt: timestamp("updated_at", { withTimezone: true }).defaultNow().notNull(),
  },
  (table) => [
    check(
      "ekklesia_core_user_preference_appearance_check",
      sql`${table.appearance} is null or ${table.appearance} in ('system', 'light', 'dark')`,
    ),
    check(
      "ekklesia_core_user_preference_motion_check",
      sql`${table.motion} is null or ${table.motion} in ('system', 'reduce', 'allow')`,
    ),
  ],
);

/** Explicit map passed to Drizzle, mirroring `dashboardSchema` and `moduleLifecycleSchema`. The
 * user table is included because the account summary reads a person's own name and email from it;
 * nothing in this domain writes to it. */
export const accountSchema = {
  user: ekklesiaCoreUser,
  userPreference: ekklesiaCoreUserPreference,
} as const;