// Investor Flow — X position-capture materializer (M21 follow-up).
//
// Reads a tracked fund manager's posts from x_cookie_posts (already fetched by
// the `x` timeline job), classifies them with captureParser, and upserts total
// position snapshots into fund_position_records with source='capture'.
//
// Recency rule (mirrorEngine): captures and 13F compete on MAX(as_of) per symbol.
// CLAIMS are explicitly skipped in v1: a claim ("added 865,000 shares") is a
// DELTA, not a total — letting it win recency would corrupt the Live Book.
// Claim folding (delta onto latest total) is future work.
//
// Local-only: no network, no rate limiting — this is a materializer, run from
// the x schedule branch after timeline jobs are enqueued.
import type { DatabaseSync } from 'node:sqlite';
import { extractCaptures } from '../mirror/captureParser.ts';

export interface CaptureIngestStats {
  fundId: string;
  postsScanned: number;
  captures: number;   // total-position posts materialized (inserted or refreshed)
  inserted: number;
  refreshed: number;
  claims: number;     // delta posts detected — recorded for observability, not materialized
  skipped: number;    // commentary / unparseable / missing symbol
  disabled: boolean;
}

export interface FundWithHandle {
  id: string;
  x_handle: string | null;
  enabled: number;
}

export function listTrackedFundHandles(db: DatabaseSync): FundWithHandle[] {
  return db.prepare('SELECT id, x_handle, enabled FROM tracked_funds').all() as FundWithHandle[];
}

interface PostRow {
  post_id: string;
  body_text: string | null;
  posted_at: string;
}

/**
 * Materialize captures for one fund. Idempotent: converges on
 * (fund_id, symbol, source='capture', evidence_url) — a re-run with the same
 * post updates the row instead of duplicating it.
 */
export function ingestFundCaptures(db: DatabaseSync, fundId: string): CaptureIngestStats {
  const fund = db.prepare('SELECT id, x_handle, enabled FROM tracked_funds WHERE id = ?').get(fundId) as
    | FundWithHandle
    | undefined;

  const stats: CaptureIngestStats = {
    fundId,
    postsScanned: 0,
    captures: 0,
    inserted: 0,
    refreshed: 0,
    claims: 0,
    skipped: 0,
    disabled: false,
  };
  if (!fund || !fund.x_handle) return stats;
  if (fund.enabled !== 1) { stats.disabled = true; return stats; }

  const posts = db.prepare(
    `SELECT post_id, body_text, posted_at FROM x_cookie_posts
     WHERE lower(author_handle) = lower(?)
       AND body_text IS NOT NULL AND body_text != ''
     ORDER BY posted_at ASC`,
  ).all(fund.x_handle) as PostRow[];
  stats.postsScanned = posts.length;

  const selectExisting = db.prepare(
    `SELECT id FROM fund_position_records WHERE fund_id=? AND symbol=? AND source='capture' AND evidence_url=?`,
  );
  const updateExisting = db.prepare(
    `UPDATE fund_position_records SET shares=?, value_usd=?, cost_basis=?, as_of=?, notes=COALESCE(notes, ?)
     WHERE id=?`,
  );
  const insertNew = db.prepare(
    `INSERT INTO fund_position_records (id, fund_id, symbol, shares, value_usd, cost_basis, as_of, source, evidence_url, notes, created_at)
     VALUES (?,?,?,?,?,?,?, 'capture', ?, ?, ?)`,
  );

  for (const p of posts) {
    // One post can mention several names (Mike: SLNH fill + OPEN total in one tweet).
    const parsedList = extractCaptures(p.body_text ?? '');
    if (parsedList.length === 0) {
      stats.skipped++;
      continue;
    }

    let anyMaterialized = false;
    for (const parsed of parsedList) {
      if (parsed.class === 'claim') {
        stats.claims++;
        continue;
      }
      if (parsed.class !== 'capture') continue;
      if (!parsed.symbol) continue;

      const asOf = normalizePostedAtDate(p.posted_at);
      const evidenceUrl = `https://x.com/${fund.x_handle}/status/${p.post_id}`;
      // Preserve book_reset / pre_reset markers; only stamp instrument notes when empty.
      const instrumentNote = parsed.instrument && parsed.instrument !== 'equity'
        ? parsed.instrument
        : null;
      const existing = selectExisting.get(fundId, parsed.symbol, evidenceUrl) as { id?: string } | undefined;

      if (existing?.id) {
        updateExisting.run(
          parsed.shares ?? null, parsed.value_usd ?? null, parsed.cost_basis ?? null, asOf,
          instrumentNote, existing.id,
        );
        stats.refreshed++;
      } else {
        insertNew.run(
          crypto.randomUUID(), fundId, parsed.symbol,
          parsed.shares ?? null, parsed.value_usd ?? null, parsed.cost_basis ?? null, asOf, evidenceUrl,
          instrumentNote, new Date().toISOString(),
        );
        stats.inserted++;
      }
      stats.captures++;
      anyMaterialized = true;
    }
    if (!anyMaterialized && parsedList.every((x) => x.class === 'claim')) {
      // already counted as claims
    } else if (!anyMaterialized) {
      stats.skipped++;
    }
  }

  return stats;
}

/** posted_at may be ISO or Twitter "Wed Jul 15 20:43:28 +0000 2026". */
function normalizePostedAtDate(postedAt: string): string {
  if (/^\d{4}-\d{2}-\d{2}/.test(postedAt)) return postedAt.slice(0, 10);
  const t = Date.parse(postedAt);
  if (Number.isFinite(t)) return new Date(t).toISOString().slice(0, 10);
  return postedAt.slice(0, 10);
}

/** Materialize captures for every enabled tracked fund with an x_handle. */
export function ingestAllFundCaptures(db: DatabaseSync): CaptureIngestStats[] {
  return listTrackedFundHandles(db)
    .filter((f) => f.x_handle && f.enabled === 1)
    .map((f) => ingestFundCaptures(db, f.id));
}