/**
 * Field-level override history for interests + their linked clients.
 *
 * Every time a field on an interest or its linked client is overridden
 * via an explicit channel (today: supplemental-info form submission;
 * future: form-templates, AI-assisted extraction acceptance), a row
 * lands here. Distinct from `audit_logs` - that table tracks every
 * CRUD event for compliance; this one tracks only deliberate overrides
 * so the Interest + Client "Field history" panels can surface them
 * compactly.
 */

import { pgTable, text, jsonb, timestamp, index } from 'drizzle-orm/pg-core';
import { sql } from 'drizzle-orm';

import { ports } from './ports';
import { interests } from './interests';
import { clients } from './clients';

export const interestFieldHistory = pgTable(
  'interest_field_history',
  {
    id: text('id')
      .primaryKey()
      .$defaultFn(() => crypto.randomUUID()),
    portId: text('port_id')
      .notNull()
      .references(() => ports.id),
    interestId: text('interest_id').references(() => interests.id, { onDelete: 'cascade' }),
    /** Denormalized for fast lookup on the Client detail "Field history"
     *  panel - overrides that come in via a supplemental-info form
     *  carry both interest + client refs. Direct-edit overrides may
     *  only carry one. */
    clientId: text('client_id').references(() => clients.id, { onDelete: 'cascade' }),
    /** Dotted path of the field that was overridden. Examples:
     *    'client.fullName'
     *    'interest.desiredLengthFt'
     *    'client.address.streetAddress'
     *  The Field history panel formats this for display. */
    fieldPath: text('field_path').notNull(),
    oldValue: jsonb('old_value'),
    newValue: jsonb('new_value').notNull(),
    /** Provenance: 'supplemental_form' | 'rep_edit' | 'system_inferred' |
     *  'ai_extraction' (future). Drives the "Submitted via X" copy. */
    source: text('source').notNull(),
    /** Optional FK to the form_submissions row that triggered the
     *  override. Lets the UI link back to the original submission. */
    submissionId: text('submission_id'),
    createdAt: timestamp('created_at', { withTimezone: true }).notNull().defaultNow(),
    createdBy: text('created_by'),
  },
  (table) => [
    index('idx_ifh_interest_created')
      .on(table.portId, table.interestId, table.createdAt)
      .where(sql`${table.interestId} IS NOT NULL`),
    index('idx_ifh_client_created')
      .on(table.portId, table.clientId, table.createdAt)
      .where(sql`${table.clientId} IS NOT NULL`),
  ],
);

export type InterestFieldHistory = typeof interestFieldHistory.$inferSelect;
export type NewInterestFieldHistory = typeof interestFieldHistory.$inferInsert;
