"""
analyze.py — C25 Financial Signal Extractor

Pipeline (v2):
  1. Alias screen on title+desc for C25 mentions
  2. Coverage-spread filter: skip low-quality / one-sided articles
  3. NER upgrade: BERT-NER to confirm and expand matches
  4. Full-text fetch + re-screen
  5. FinBERT: quick sentiment — drop neutral < FINBERT_MIN_CONF
  6. Claude: structured extraction (tickers, magnitude, timeframe)
  7. yfinance: momentum check — direction alignment
  8. signal_score = sentiment_confidence × coverage_spread × momentum_alignment
  9. Alert if signal_score > ALERT_THRESHOLD

Usage:
  python3 analyze.py                  # analyze new articles only
  python3 analyze.py --force          # re-analyze everything
  python3 analyze.py --limit 20       # limit to 20 articles
  python3 analyze.py --dry-run        # show matches without storing
  python3 analyze.py --no-claude      # skip Claude step (no API cost)
"""

import re
import os
import sys
import json
import time
import math
import sqlite3
import logging
import warnings
from datetime import datetime
from pathlib import Path

# Silence transformer noise before importing
os.environ.setdefault("TRANSFORMERS_VERBOSITY", "error")
os.environ.setdefault("HF_HUB_DISABLE_PROGRESS_BARS", "1")
warnings.filterwarnings("ignore")
logging.getLogger("transformers").setLevel(logging.ERROR)

import torch
from transformers import pipeline
from dotenv import load_dotenv

# Load .env (supports both ANTHROPIC_API_KEY and anthropic_api_key)
_env_file = Path(__file__).parent / ".env"
if _env_file.exists():
    load_dotenv(_env_file, override=False)
    for _k, _v in list(os.environ.items()):
        if _k.lower() == "anthropic_api_key" and "ANTHROPIC_API_KEY" not in os.environ:
            os.environ["ANTHROPIC_API_KEY"] = _v

# Ground News helpers
sys.path.insert(0, str(Path(__file__).parent))
from ground_news import get_db, fetch_article_text, fetch_all
from rss_feeds import fetch_all_rss

# ---------------------------------------------------------------------------
# Config
# ---------------------------------------------------------------------------

C25_PATH = Path(__file__).parent / "c25.json"
_c25_raw = json.loads(C25_PATH.read_text())
C25: dict[str, dict] = {k: v for k, v in _c25_raw.items() if not k.startswith("_")}

# Build alias → ticker lookup (lower-cased for matching)
ALIAS_MAP: dict[str, str] = {}
for _ticker, _data in C25.items():
    for _alias in _data["aliases"]:
        al = _alias.lower()
        if al not in ALIAS_MAP:  # first alias wins (most specific first in c25.json)
            ALIAS_MAP[al] = _ticker

DEVICE = -1  # always CPU — Quadro P400 (CC 6.1) too old + too little VRAM for these models

# Quality thresholds
MIN_SOURCES         = 1     # coverage_spread naturally weights single-source articles near zero
MIN_COVERAGE_SPREAD = 0.0   # disabled: signal_score naturally zeros out single-source articles
FINBERT_MIN_CONF    = 0.70  # drop neutral articles below this FinBERT confidence
ALERT_THRESHOLD     = 0.35  # signal_score > this → alert

# ---------------------------------------------------------------------------
# Claude metrics
# ---------------------------------------------------------------------------

METRICS_FILE = Path(__file__).parent / "metrics.json"

# Pricing: Claude 3 Haiku — https://www.anthropic.com/pricing
_PRICE_INPUT_PER_TOKEN  = 0.25 / 1_000_000   # $0.25 per MTok
_PRICE_OUTPUT_PER_TOKEN = 1.25 / 1_000_000   # $1.25 per MTok


def calc_cost(input_tokens: int, output_tokens: int) -> float:
    return round(input_tokens * _PRICE_INPUT_PER_TOKEN + output_tokens * _PRICE_OUTPUT_PER_TOKEN, 6)


def update_metrics(input_tokens: int, output_tokens: int) -> None:
    """Accumulate Claude token usage into metrics.json."""
    cost = calc_cost(input_tokens, output_tokens)
    data: dict = {}
    if METRICS_FILE.exists():
        try:
            data = json.loads(METRICS_FILE.read_text())
        except Exception:
            pass
    data["total_calls"]         = data.get("total_calls", 0) + 1
    data["total_input_tokens"]  = data.get("total_input_tokens", 0) + input_tokens
    data["total_output_tokens"] = data.get("total_output_tokens", 0) + output_tokens
    data["total_cost_usd"]      = round(data.get("total_cost_usd", 0.0) + cost, 6)
    data["last_updated"]        = datetime.now().isoformat(timespec="seconds")
    METRICS_FILE.write_text(json.dumps(data, indent=2))


# ---------------------------------------------------------------------------
# Model loading
# ---------------------------------------------------------------------------

_ner_model     = None
_finbert_model = None


def get_ner():
    global _ner_model
    if _ner_model is None:
        print("[analyze] Loading dslim/bert-base-NER …", flush=True)
        _ner_model = pipeline(
            "ner",
            model="dslim/bert-base-NER",
            aggregation_strategy="simple",
            device=DEVICE,
        )
    return _ner_model


def get_finbert():
    global _finbert_model
    if _finbert_model is None:
        print("[analyze] Loading ProsusAI/finbert …", flush=True)
        _finbert_model = pipeline(
            "sentiment-analysis",
            model="ProsusAI/finbert",
            device=DEVICE,
            truncation=True,
            max_length=512,
        )
    return _finbert_model


# ---------------------------------------------------------------------------
# C25 alias matching
# ---------------------------------------------------------------------------

def match_c25(text: str) -> dict[str, float]:
    """
    Find C25 companies mentioned in text.
    Returns {ticker: confidence_score}.
    """
    text_lower = text.lower()
    matches: dict[str, float] = {}

    for alias_lower, ticker in ALIAS_MAP.items():
        if ticker in matches:
            continue  # already found this company

        # Always use word boundaries — prevents "sonic" matching "hypersonic",
        # "net" matching "internet", "iss" matching "mission", etc.
        pat = r"(?<![a-zA-Z0-9])" + re.escape(alias_lower) + r"(?![a-zA-Z0-9])"

        if re.search(pat, text_lower):
            # Confidence: longer alias match = more reliable
            conf = min(0.99, 0.70 + len(alias_lower) * 0.01)
            matches[ticker] = conf

    return matches


def merge_ner_matches(ner_result: list[dict], base: dict[str, float]) -> dict[str, float]:
    """
    Cross-reference NER ORG entities with alias map.
    Requires whole-token match to avoid 'EMA' matching 'd-ema-nt'.
    """
    merged = dict(base)
    for ent in ner_result:
        if ent.get("entity_group") not in ("ORG", "PER"):
            continue
        word_tokens = set(re.split(r"[\s\-_/]+", ent["word"].lower().strip("##")))
        for alias_lower, ticker in ALIAS_MAP.items():
            if len(alias_lower) < 4:
                continue
            alias_tokens = set(re.split(r"[\s\-_/]+", alias_lower))
            # Need significant token overlap, not just substring containment
            overlap = alias_tokens & word_tokens
            if overlap and len(overlap) / max(len(alias_tokens), len(word_tokens)) >= 0.5:
                score = ent.get("score", 0.7)
                if score > merged.get(ticker, 0):
                    merged[ticker] = score
    return merged




# ---------------------------------------------------------------------------
# Coverage spread scoring
# ---------------------------------------------------------------------------

def coverage_spread_score(row) -> float:
    """
    Quality score (0–1) based on source count and bias diversity.
    High = many sources from left + right + centre. Low = few or echo chamber.
    """
    src   = row["source_count"] or 0
    left  = row["left_src_count"] or 0
    right = row["right_src_count"] or 0
    ctr   = row["ctr_src_count"] or 0

    if src < MIN_SOURCES:
        return 0.0

    quantity  = min(1.0, math.log(max(1, src)) / math.log(50))
    fl, fr, fc = left / src, right / src, ctr / src
    diversity  = min(1.0, (fl * fr * fc) ** (1 / 3) * 9)  # peaks at equal thirds

    return round(quantity * 0.6 + diversity * 0.4, 3)


# ---------------------------------------------------------------------------
# Claude structured extraction
# ---------------------------------------------------------------------------

def claude_extract(title: str, text: str, tickers: list[str]) -> tuple[dict, int, int]:
    """
    Use Claude Haiku to extract structured financial signal.
    Returns ({"confirmed_tickers", "magnitude", "timeframe", "reasoning"}, input_tokens, output_tokens).
    """
    import anthropic

    api_key = os.environ.get("ANTHROPIC_API_KEY")
    if not api_key:
        return {"confirmed_tickers": tickers, "magnitude": 5, "timeframe": "days", "reasoning": "(no API key)"}, 0, 0

    client = anthropic.Anthropic(api_key=api_key)
    ticker_ctx = "\n".join(
        f"  {t}: {C25[t]['name']} ({C25[t]['sector']})" for t in tickers if t in C25
    )

    prompt = f"""You are a financial analyst specializing in Scandinavian equities.

Analyze this news article and assess its financial impact on the listed Danish C25 companies.

## Companies to analyze:
{ticker_ctx}

## Article:
Title: {title}
{text[:1500]}

Respond ONLY with valid JSON (no markdown fences):
{{
  "confirmed_tickers": ["NOVO-B"],
  "magnitude": 7,
  "timeframe": "days",
  "reasoning": "Two sentences max on financial impact and direction."
}}

Fields:
- confirmed_tickers: only companies truly affected (can be [])
- magnitude: 1–10 (1=irrelevant, 10=major market mover)
- timeframe: "hours", "days", "weeks", or "months"
- reasoning: brief analyst note"""

    try:
        msg = client.messages.create(
            model="claude-3-haiku-20240307",
            max_tokens=256,
            messages=[{"role": "user", "content": prompt}],
        )
        raw = msg.content[0].text.strip()
        raw = re.sub(r"^```(?:json)?\n?", "", raw)
        raw = re.sub(r"\n?```$", "", raw)
        return json.loads(raw), msg.usage.input_tokens, msg.usage.output_tokens
    except Exception as e:
        print(f"  [warn] Claude failed: {e}")
        return {"confirmed_tickers": tickers, "magnitude": 5, "timeframe": "days", "reasoning": str(e)[:120]}, 0, 0


# ---------------------------------------------------------------------------
# yfinance momentum
# ---------------------------------------------------------------------------

_momentum_cache: dict[str, dict] = {}


def momentum_check(ticker: str) -> dict:
    """5-day price momentum for a C25 ticker via yfinance."""
    if ticker in _momentum_cache:
        return _momentum_cache[ticker]

    import yfinance as yf

    company      = C25.get(ticker, {})
    yahoo_ticker = company.get("yahoo_ticker", ticker + ".CO")
    result: dict = {"direction": "unknown", "pct_5d": 0.0, "pct_20d": 0.0}

    try:
        hist = yf.Ticker(yahoo_ticker).history(period="1mo", auto_adjust=True)
        if len(hist) >= 5:
            close     = hist["Close"]
            pct_5d    = float((close.iloc[-1] / close.iloc[-5] - 1) * 100)
            pct_20d   = float((close.iloc[-1] / close.iloc[0]  - 1) * 100) if len(hist) >= 20 else 0.0
            direction = "up" if pct_5d > 1.5 else ("down" if pct_5d < -1.5 else "flat")
            result    = {"direction": direction, "pct_5d": round(pct_5d, 2), "pct_20d": round(pct_20d, 2)}
    except Exception:
        pass

    _momentum_cache[ticker] = result
    return result


# ---------------------------------------------------------------------------
# Signal score
# ---------------------------------------------------------------------------

def calc_signal_score(sent_score: float, sentiment: str, coverage: float, momentum: dict) -> float:
    """signal_score = sentiment_confidence × coverage_spread × momentum_alignment"""
    d = momentum.get("direction", "unknown")
    if d == "unknown":
        alignment = 0.5
    elif d == "flat":
        alignment = 0.7
    elif (sentiment == "positive" and d == "up") or (sentiment == "negative" and d == "down"):
        alignment = 1.0
    else:
        alignment = 0.4   # contrarian

    return round(sent_score * coverage * alignment, 3)


# ---------------------------------------------------------------------------
# DB schema migration
# ---------------------------------------------------------------------------

def migrate_db(db) -> None:
    """Apply schema migrations for SQLite. No-op for Postgres (schema managed by db.py)."""
    if hasattr(db, "db_type") and db.db_type == "postgres":
        return
    existing = {row[1] for row in db.execute("PRAGMA table_info(article_signals)").fetchall()}
    new_cols = [
        ("coverage_spread",  "REAL    DEFAULT 0"),
        ("claude_tickers",   "TEXT"),
        ("claude_magnitude", "INTEGER DEFAULT 5"),
        ("claude_timeframe", "TEXT"),
        ("claude_reasoning", "TEXT"),
        ("momentum_dir",     "TEXT"),
        ("momentum_pct_5d",  "REAL    DEFAULT 0"),
        ("signal_score",     "REAL    DEFAULT 0"),
        ("alert",            "INTEGER DEFAULT 0"),
    ]
    for col_name, col_def in new_cols:
        if col_name not in existing:
            db.execute(f"ALTER TABLE article_signals ADD COLUMN {col_name} {col_def}")
    db.commit()


# ---------------------------------------------------------------------------
# Main pipeline
# ---------------------------------------------------------------------------

def analyze_articles(
    *,
    force: bool = False,
    limit: int | None = None,
    dry_run: bool = False,
    use_claude: bool = True,
    auto_fetch: bool = True,
    max_claude_calls: int = 50,
) -> None:
    db = get_db()
    migrate_db(db)

    # Auto-refresh articles (respects 30-min cache TTL)
    if auto_fetch and not dry_run:
        before = db.execute("SELECT COUNT(*) AS cnt FROM articles").fetchone()["cnt"]
        print("[analyze] Refreshing Ground News feed …")
        fetch_all(db)
        print("[analyze] Henter danske RSS feeds …")
        fetch_all_rss(db)
        after = db.execute("SELECT COUNT(*) AS cnt FROM articles").fetchone()["cnt"]
        if after > before:
            print(f"[analyze] +{after - before} new articles")

    base_q = """
        SELECT slug, title, description, source_count,
               left_src_count, right_src_count, ctr_src_count,
               left_pct, right_pct, ctr_pct
        FROM articles {where}
        ORDER BY source_count DESC
    """
    rows = db.execute(
        base_q.format(where="" if force else
            "WHERE slug NOT IN (SELECT DISTINCT article_slug FROM article_signals)")
    ).fetchall()
    if limit:
        rows = rows[:limit]

    total = len(rows)
    print(f"[analyze] {total} articles to process  (force={force}  dry_run={dry_run}  claude={use_claude})")
    if total == 0:
        print("[analyze] Nothing to do.")
        db.close()
        return

    # ------------------------------------------------------------------
    # Phase 1 — Alias screen + coverage spread filter
    # ------------------------------------------------------------------
    print("[analyze] Phase 1: alias screen + coverage filter …")
    screened: list[tuple] = []
    dropped_cov = 0

    for row in rows:
        cov = coverage_spread_score(row)
        if cov < MIN_COVERAGE_SPREAD:
            dropped_cov += 1
            continue
        text    = f"{row['title']}. {row['description'] or ''}"
        matches = match_c25(text)
        if matches:
            screened.append((row, matches, cov))

    print(f"[analyze] {len(screened)}/{total} passed  ({dropped_cov} dropped by coverage filter)")
    if not screened:
        db.close()
        return

    # ------------------------------------------------------------------
    # Phase 2 — NER upgrade
    # ------------------------------------------------------------------
    print("[analyze] Phase 2: NER upgrade …")
    ner   = get_ner()
    texts = [f"{r['title']}. {r['description'] or ''}" for r, _, _ in screened]

    BATCH   = 16
    all_ner = []
    for i in range(0, len(texts), BATCH):
        all_ner.extend(ner(texts[i : i + BATCH]))

    enriched = [
        (row, merge_ner_matches(ner_res, base), cov)
        for (row, base, cov), ner_res in zip(screened, all_ner)
    ]

    # ------------------------------------------------------------------
    # Phase 3 — Full text + re-screen
    # ------------------------------------------------------------------
    print(f"[analyze] Phase 3: fetching full text for {len(enriched)} articles …")
    final: list[tuple] = []

    for idx, (row, matches, cov) in enumerate(enriched, 1):
        slug = row["slug"]
        if idx % 5 == 0 or idx == len(enriched):
            print(f"  {idx}/{len(enriched)}: {slug[:55]}")

        # RSS artikler har teksten gemt i page_cache som "rss:{slug}"
        cats = row["categories"] if "categories" in row.keys() else ""
        if cats and cats.startswith("rss:"):
            cache_row = db.execute(
                "SELECT content FROM page_cache WHERE url = ?",
                (f"rss:{slug}",),
            ).fetchone()
            full_text = cache_row["content"] if cache_row else f"{row['title']}. {row['description'] or ''}"
        else:
            full_text = fetch_article_text(slug, db)

        full_matches = match_c25(full_text)
        for ticker, score in full_matches.items():
            if score > matches.get(ticker, 0):
                matches[ticker] = score
        if matches:
            final.append((row, matches, cov, full_text))

    print(f"[analyze] {len(final)} articles with confirmed C25 mentions")

    # ------------------------------------------------------------------
    # Phase 4 — FinBERT sentiment (confidence filter)
    # ------------------------------------------------------------------
    print("[analyze] Phase 4: FinBERT sentiment …")
    finbert          = get_finbert()
    now              = int(time.time())
    signals_written  = 0
    alerts_triggered = 0
    claude_calls_this_run = 0

    # Daily spend guard — read current metrics before starting
    _existing = {}
    if METRICS_FILE.exists():
        try:
            _existing = json.loads(METRICS_FILE.read_text())
        except Exception:
            pass
    DAILY_COST_CAP = float(os.getenv("CLAUDE_DAILY_CAP_USD", "2.0"))

    for row, matches, cov, full_text in final:
        slug  = row["slug"]
        title = row["title"]

        try:
            fb        = finbert(" ".join(full_text.split()[:400]))[0]
            sentiment = fb["label"].lower()
            sent_score = round(fb["score"], 4)
        except Exception as e:
            print(f"  [warn] FinBERT: {e}")
            sentiment, sent_score = "neutral", 0.5

        if sentiment == "neutral" and sent_score < FINBERT_MIN_CONF:
            continue   # drop low-confidence neutral noise

        # ------------------------------------------------------------------
        # Phase 5 — Claude extraction
        # ------------------------------------------------------------------
        claude_data: dict = {}
        if use_claude and not dry_run and os.environ.get("ANTHROPIC_API_KEY"):
            if claude_calls_this_run >= max_claude_calls:
                print(f"  [claude] ⚠️  per-run cap ({max_claude_calls}) reached — skipping remaining articles")
                use_claude = False
            elif _existing.get("total_cost_usd", 0.0) >= DAILY_COST_CAP:
                print(f"  [claude] ⚠️  daily spend cap ${DAILY_COST_CAP} reached — skipping Claude for remaining articles")
                use_claude = False
            else:
                print(f"  [claude] {slug[:50]}")
                claude_data, _in_tok, _out_tok = claude_extract(title, full_text, list(matches.keys()))
                if _in_tok:
                    update_metrics(_in_tok, _out_tok)
                    _existing["total_cost_usd"] = _existing.get("total_cost_usd", 0.0) + calc_cost(_in_tok, _out_tok)
                    claude_calls_this_run += 1

        # ------------------------------------------------------------------
        # Phase 6 — yfinance momentum + scoring
        # ------------------------------------------------------------------
        for ticker, entity_score in matches.items():
            company = C25[ticker]
            full_lower    = full_text.lower()
            mention_count = max(1, sum(
                len(re.findall(
                    r"(?<![a-zA-Z0-9])" + re.escape(a.lower()) + r"(?![a-zA-Z0-9])",
                    full_lower,
                ))
                for a in company["aliases"]
            ))

            momentum  = momentum_check(ticker) if not dry_run else {}
            sig_score = calc_signal_score(sent_score, sentiment, cov, momentum)
            alert     = sig_score > ALERT_THRESHOLD and sentiment != "neutral"

            if dry_run:
                print(
                    f"  DRY: {slug[:38]:<38} | {ticker:<8} | "
                    f"{sentiment:<8} {sent_score:.2f} | cov={cov:.2f} | sig={sig_score:.3f}"
                    f"{' ⚡' if alert else ''}"
                )
            else:
                db.upsert(
                    "article_signals",
                    ["article_slug", "ticker"],
                    [
                        "article_slug", "ticker", "company_name", "sector",
                        "sentiment", "sentiment_score", "entity_score",
                        "mention_count", "full_text_used", "analyzed_at",
                        "coverage_spread", "claude_tickers", "claude_magnitude",
                        "claude_timeframe", "claude_reasoning",
                        "momentum_dir", "momentum_pct_5d", "signal_score", "alert",
                    ],
                    (
                        slug, ticker, company["name"], company["sector"],
                        sentiment, float(sent_score), round(float(entity_score), 4),
                        mention_count, 1, now,
                        float(cov),
                        json.dumps(claude_data.get("confirmed_tickers", [])) or None,
                        claude_data.get("magnitude", 5),
                        claude_data.get("timeframe", "days"),
                        claude_data.get("reasoning", ""),
                        momentum.get("direction", "unknown"),
                        float(momentum.get("pct_5d", 0.0)),
                        float(sig_score),
                        int(alert),
                    ),
                )
                signals_written += 1
                if alert:
                    alerts_triggered += 1
                    icon = "↑" if sentiment == "positive" else "↓"
                    print(
                        f"  ⚡ ALERT: {icon} {ticker} ({company['name']}) | "
                        f"{sentiment} {sent_score:.2f} | sig={sig_score:.3f} | {slug[:40]}"
                    )

    if not dry_run:
        db.commit()
        print(f"[analyze] Done. {signals_written} signals written, {alerts_triggered} alerts triggered.")
    else:
        print(f"[analyze] Dry-run complete. {len(final)} articles matched.")

    db.close()


# ---------------------------------------------------------------------------
# CLI — brug Makefile i stedet for at huske flags
# ---------------------------------------------------------------------------

def main() -> None:
    import sys
    force     = "--force"     in sys.argv
    dry_run   = "--dry-run"   in sys.argv or "--dry" in sys.argv
    no_claude = "--no-claude" in sys.argv

    # --max-claude=N  override per-run cap
    max_calls = 50
    for arg in sys.argv:
        if arg.startswith("--max-claude="):
            try:
                max_calls = int(arg.split("=", 1)[1])
            except ValueError:
                pass

    if force:
        print(f"[analyze] ⚠️  --force mode: re-analyzing ALL articles (claude cap={max_calls})")

    analyze_articles(
        force=force,
        dry_run=dry_run,
        use_claude=not no_claude,
        max_claude_calls=max_calls,
    )


if __name__ == "__main__":
    main()