#!/usr/bin/env python3
"""Fetch latest two Quartr earnings-call transcript bundles for each company."""

from __future__ import annotations

import argparse
import json
import os
import re
import sys
import time
from collections import defaultdict
from datetime import datetime, timezone
from pathlib import Path
from typing import Any

import requests


def load_config(path: Path) -> dict[str, Any]:
    return json.loads(path.read_text())


def load_jsonl(path: Path) -> list[dict[str, Any]]:
    rows: list[dict[str, Any]] = []
    with path.open("r", encoding="utf-8") as handle:
        for line in handle:
            line = line.strip()
            if line:
                rows.append(json.loads(line))
    return rows


class QuartrClient:
    def __init__(self, config: dict[str, Any]) -> None:
        self.base_url = config["quartr"]["base_url"].rstrip("/")
        self.timeout = int(config["quartr"]["timeout_seconds"])
        self.max_retries = int(config["quartr"]["max_retries"])
        self.pause = float(config["quartr"]["request_pause_seconds"])
        self.session = requests.Session()
        api_key = os.getenv("QUARTR_API_KEY", "").strip()
        if not api_key:
            raise RuntimeError("QUARTR_API_KEY is required because it is a secret API credential.")
        self.session.headers.update({"x-api-key": api_key, "Accept": "application/json"})

    def get(self, path: str, params: dict[str, Any]) -> dict[str, Any]:
        for attempt in range(1, self.max_retries + 1):
            try:
                response = self.session.get(f"{self.base_url}/{path}", params=params, timeout=self.timeout)
                response.raise_for_status()
                time.sleep(self.pause)
                payload = response.json()
                break
            except requests.RequestException:
                if attempt == self.max_retries:
                    raise
                time.sleep(attempt * 2)
        if not isinstance(payload, dict):
            raise RuntimeError(f"Unexpected response for {path}: {type(payload)!r}")
        return payload

    def download_json(self, url: str) -> dict[str, Any] | None:
        for attempt in range(1, self.max_retries + 1):
            try:
                response = self.session.get(url, timeout=self.timeout)
                response.raise_for_status()
                time.sleep(self.pause)
                try:
                    payload = response.json()
                except json.JSONDecodeError:
                    return None
                break
            except requests.RequestException:
                if attempt == self.max_retries:
                    raise
                time.sleep(attempt * 2)
        return payload if isinstance(payload, dict) else None


def is_past_event(event: dict[str, Any]) -> bool:
    raw = event.get("date")
    if not isinstance(raw, str) or not raw.strip():
        return True
    try:
        parsed = datetime.fromisoformat(raw.replace("Z", "+00:00"))
    except ValueError:
        return True
    return parsed <= datetime.now(timezone.utc)


def slug_tokens(company_name: str) -> list[str]:
    stopwords = {
        "inc",
        "incorporated",
        "corp",
        "corporation",
        "company",
        "co",
        "plc",
        "limited",
        "ltd",
        "class",
        "the",
    }
    tokens = re_split_tokens(company_name)
    return [token for token in tokens if token not in stopwords]


def re_split_tokens(value: str) -> list[str]:
    return [token for token in re_split_non_alnum(value.lower()) if token]


def re_split_non_alnum(value: str) -> list[str]:
    return re.split(r"[^a-z0-9]+", value)


def event_matches_company(event: dict[str, Any], company: dict[str, Any]) -> bool:
    backlink = str(event.get("backlinkUrl") or "").lower()
    tokens = slug_tokens(str(company.get("company_name") or ""))
    distinctive = [token for token in tokens if len(token) >= 3] or tokens[:1]
    return bool(distinctive) and any(token in backlink for token in distinctive)


def fetch_events(client: QuartrClient, company: dict[str, Any], event_type_ids: list[int], limit: int) -> list[dict[str, Any]]:
    ticker = str(company["ticker"]).upper()
    payload = client.get(
        "events",
        {
            "tickers": ticker.upper(),
            "typeIds": ",".join(str(value) for value in event_type_ids),
            "limit": str(limit),
            "sortBy": "date",
            "direction": "desc",
        },
    )
    rows = payload.get("data") or []
    return [
        row
        for row in rows
        if isinstance(row, dict) and is_past_event(row) and event_matches_company(row, company)
    ]


def fetch_transcript_meta(client: QuartrClient, event_id: int) -> dict[str, Any] | None:
    payload = client.get(
        "documents/transcripts",
        {"eventIds": str(event_id), "limit": "1", "direction": "desc"},
    )
    rows = payload.get("data") or []
    for row in rows:
        if isinstance(row, dict) and row.get("fileUrl"):
            return row
    return None


def extract_text(payload: dict[str, Any] | None) -> str | None:
    if not payload:
        return None
    transcript = payload.get("transcript")
    if isinstance(transcript, dict):
        text = transcript.get("text")
        if isinstance(text, str) and text.strip():
            return text.strip()
        paragraphs = transcript.get("paragraphs") or transcript.get("segments") or []
        if isinstance(paragraphs, list):
            parts = []
            for paragraph in paragraphs:
                if not isinstance(paragraph, dict):
                    continue
                speaker = paragraph.get("speaker") or paragraph.get("speakerName")
                raw = paragraph.get("text") or paragraph.get("body")
                if isinstance(raw, str) and raw.strip():
                    prefix = f"{speaker}: " if isinstance(speaker, str) and speaker.strip() else ""
                    parts.append(prefix + raw.strip())
            if parts:
                return "\n".join(parts)
    text = payload.get("text")
    if isinstance(text, str) and text.strip():
        return text.strip()
    return None


def build_bundle(
    ticker: str,
    company: dict[str, Any],
    event: dict[str, Any],
    transcript_meta: dict[str, Any],
    payload: dict[str, Any] | None,
) -> dict[str, Any]:
    return {
        "ticker": ticker.upper(),
        "company": {
            "name": company.get("company_name"),
            "gics_sector": company.get("gics_sector"),
            "gics_sub_industry": company.get("gics_sub_industry"),
        },
        "event": {
            "id": event.get("id"),
            "title": event.get("title"),
            "date": event.get("date"),
            "fiscal_year": event.get("fiscalYear"),
            "fiscal_period": event.get("fiscalPeriod"),
            "type_id": event.get("typeId"),
            "company_id": event.get("companyId"),
            "backlink_url": event.get("backlinkUrl"),
        },
        "transcript": {
            "document_id": transcript_meta.get("id"),
            "file_url": transcript_meta.get("fileUrl"),
            "text": extract_text(payload),
        },
    }


def append_jsonl(path: Path, row: dict[str, Any]) -> None:
    path.parent.mkdir(parents=True, exist_ok=True)
    with path.open("a", encoding="utf-8") as handle:
        handle.write(json.dumps(row, ensure_ascii=True) + "\n")


def iter_bundles(
    config: dict[str, Any],
    universe_rows: list[dict[str, Any]],
    max_companies: int | None,
    output_path: Path | None = None,
) -> list[dict[str, Any]]:
    client = QuartrClient(config)
    event_type_ids = config["scope"]["event_type_ids"]
    events_per_company = int(config["scope"]["events_per_company"])
    rows: list[dict[str, Any]] = load_jsonl(output_path) if output_path and output_path.exists() else []
    existing_counts: dict[str, int] = defaultdict(int)
    for row in rows:
        existing_counts[str(row.get("ticker") or "").upper()] += 1
    selected = universe_rows[:max_companies] if max_companies else universe_rows

    for index, company in enumerate(selected, start=1):
        ticker = str(company["ticker"]).upper()
        if existing_counts[ticker] >= events_per_company:
            print(f"[{index}/{len(selected)}] {ticker} already complete", file=sys.stderr)
            continue
        print(f"[{index}/{len(selected)}] {ticker}", file=sys.stderr)
        events = fetch_events(client, company, event_type_ids, max(events_per_company + 6, 8))
        kept = 0
        for event in events:
            event_id = event.get("id")
            if not isinstance(event_id, int):
                continue
            transcript_meta = fetch_transcript_meta(client, event_id)
            if not transcript_meta:
                continue
            payload = client.download_json(str(transcript_meta["fileUrl"]))
            bundle = build_bundle(ticker, company, event, transcript_meta, payload)
            if bundle["transcript"]["text"]:
                rows.append(bundle)
                existing_counts[ticker] += 1
                if output_path:
                    append_jsonl(output_path, bundle)
                kept += 1
            if kept >= events_per_company:
                break
    return rows


def write_jsonl(path: Path, rows: list[dict[str, Any]]) -> None:
    path.parent.mkdir(parents=True, exist_ok=True)
    with path.open("w", encoding="utf-8") as handle:
        for row in rows:
            handle.write(json.dumps(row, ensure_ascii=True) + "\n")


def parse_args() -> argparse.Namespace:
    parser = argparse.ArgumentParser()
    parser.add_argument("--config", default="config/dataset.json")
    parser.add_argument("--universe", default=None)
    parser.add_argument("--output", default=None)
    parser.add_argument("--max-companies", type=int, default=None)
    return parser.parse_args()


def main() -> int:
    args = parse_args()
    config = load_config(Path(args.config))
    universe_path = Path(args.universe or config["outputs"]["universe_file"])
    output = Path(args.output or config["outputs"]["raw_transcript_bundle"])
    if output.exists():
        print(f"Resuming from existing {output}", file=sys.stderr)
    rows = iter_bundles(config, load_jsonl(universe_path), args.max_companies, output)
    if not output.exists():
        write_jsonl(output, rows)
    print(f"Wrote {len(rows)} transcript bundles to {output}")
    return 0


if __name__ == "__main__":
    sys.exit(main())