"""Paper trading job entrypoint."""

from __future__ import annotations

import json
from datetime import datetime

import ccxt

from app.db.altcoin_db import init_db, log_cron_run, update_latest_price_cache
from app.db.paper_trading import get_paper_trading_summary, sync_recommendation
from app.db.recommendation_queries import get_active_recommendations_deduped


exchange = ccxt.binance({"enableRateLimit": True})


def run_once(limit: int = 100) -> dict:
    init_db()
    recs = get_active_recommendations_deduped(actionable_only=True, limit=limit, with_meta=False)
    results = []
    failed = []
    for rec in recs:
        symbol = rec.get("symbol")
        try:
            ticker = exchange.fetch_ticker(symbol)
            current_price = float(ticker["last"] or 0)
            event_time = datetime.now().isoformat()
            update_latest_price_cache(symbol, current_price, updated_at=event_time, source="paper_trader")
            result = sync_recommendation(rec, current_price, event_time=event_time)
            result.update({"symbol": symbol, "rec_id": rec.get("id"), "current_price": current_price})
            results.append(result)
        except Exception as exc:
            failed.append({"symbol": symbol, "error": str(exc)})
    output = {
        "status": "completed",
        "processed_count": len(results),
        "failed_count": len(failed),
        "failed": failed,
        "results": results,
        "summary": get_paper_trading_summary(days=30),
        "run_time": datetime.now().isoformat(),
    }
    print(json.dumps(output, ensure_ascii=False, indent=2, default=str))
    return output


def main(limit: int = 100):
    started_at = datetime.now()
    try:
        output = run_once(limit=limit)
    except Exception as exc:
        finished_at = datetime.now()
        log_cron_run(
            job_name="模拟交易",
            script_name="paper_trader.py",
            run_status="error",
            result_status="exception",
            started_at=started_at.isoformat(),
            finished_at=finished_at.isoformat(),
            duration_ms=int((finished_at - started_at).total_seconds() * 1000),
            summary={},
            error_message=str(exc),
        )
        raise
    finished_at = datetime.now()
    log_cron_run(
        job_name="模拟交易",
        script_name="paper_trader.py",
        run_status="success",
        result_status=output.get("status", "completed"),
        started_at=started_at.isoformat(),
        finished_at=finished_at.isoformat(),
        duration_ms=int((finished_at - started_at).total_seconds() * 1000),
        summary={
            "processed_count": output.get("processed_count", 0),
            "failed_count": output.get("failed_count", 0),
            "open_count": output.get("summary", {}).get("open_count", 0),
            "closed_count": output.get("summary", {}).get("closed_count", 0),
        },
        error_message="",
    )
    return output