"""3단계 운영 러너 — 캔들 동기화·신호·체결."""

from __future__ import annotations

import json
import logging
import subprocess
import sys
from datetime import datetime
from pathlib import Path
from typing import Any

from deepcoin.config import Settings
from deepcoin.ground_truth.pnl import _cluster_signals
from deepcoin.operations.executor import create_executor
from deepcoin.operations.signal_pipeline import (
    filter_signals_for_ops,
    generate_raw_signals,
    load_ops_candles,
)
from deepcoin.operations.state_store import load_state, reset_daily_trade_count, save_state

logger = logging.getLogger(__name__)


def _project_root() -> Path:
    return Path(__file__).resolve().parents[3]


def sync_candles_if_enabled(settings: Settings) -> bool:
    """증분 캔들 수집 스크립트를 실행한다."""
    if not settings.ops_sync_candles:
        return False
    script = _project_root() / "scripts" / "00_download.py"
    if not script.exists():
        logger.warning("캔들 동기화 스크립트 없음: %s", script)
        return False
    logger.info("캔들 증분 동기화 실행...")
    subprocess.run(
        [sys.executable, str(script)],
        cwd=str(_project_root()),
        check=False,
    )
    return True


def _signals_on_bar(signals: list[dict[str, Any]], bar_index: int) -> list[dict[str, Any]]:
    """특정 bar_index 신호만 반환."""
    return [s for s in signals if int(s.get("bar_index", -1)) == bar_index]


def _pending_bar_indices(
    kept: list[dict[str, Any]],
    last_bar_index: int,
    latest_bar_index: int,
) -> list[int]:
    """체결 대상 bar_index 목록 (최초 실행은 최신 봉만)."""
    if last_bar_index < 0:
        return [latest_bar_index] if any(
            int(s.get("bar_index", -1)) == latest_bar_index for s in kept
        ) else []
    return sorted(
        {
            int(s.get("bar_index", -1))
            for s in kept
            if int(s.get("bar_index", -1)) > last_bar_index
        }
    )


def _cluster_pending(pending: list[dict[str, Any]]) -> list[tuple[str, list[dict[str, Any]]]]:
    """연속 동일 side 신호를 클러스터로 묶는다."""
    normalized = [
        {
            "side": s["side"],
            "datetime": s["datetime"],
            "price": s["price"],
            "bar_index": s.get("bar_index", 0),
            "signal_type": s.get("signal_type", ""),
            "marker_id": s.get("marker_id"),
        }
        for s in pending
    ]
    return _cluster_signals(normalized)


class OperationsRunner:
    """3단계 운영 1회 tick 실행."""

    def __init__(self, settings: Settings) -> None:
        self.settings = settings
        self.executor = create_executor(settings)
        self.state = load_state(
            settings.ops_state_json,
            initial_cash_krw=settings.gt_initial_cash_krw,
        )
        self.state["portfolio"]["mode"] = settings.ops_mode

    def tick(self, *, sync_candles: bool | None = None) -> dict[str, Any]:
        """신호 확인 및 체결 1회."""
        if sync_candles if sync_candles is not None else self.settings.ops_sync_candles:
            sync_candles_if_enabled(self.settings)

        df = load_ops_candles(self.settings)
        latest_bar = int(len(df) - 1)
        gen = generate_raw_signals(self.settings, df=df, use_cache=True)

        # tick: 최신 봉 후보만 MTF 평가 (전기간 MTF는 백테스트 전용)
        bar_candidates = _signals_on_bar(gen["raw_signals"], latest_bar)
        filtered = filter_signals_for_ops(self.settings, bar_candidates)
        kept = filtered["kept"]

        reset_daily_trade_count(self.state)
        last_bar = int(self.state.get("last_processed_bar_index", -1))
        target_bars = _pending_bar_indices(kept, last_bar, latest_bar)

        executions: list[dict[str, Any]] = []
        max_daily = self.settings.ops_daily_max_trades

        for bar_idx in target_bars:
            bar_signals = _signals_on_bar(kept, bar_idx)
            clusters = _cluster_pending(bar_signals)
            for side, cluster in clusters:
                if self.state["trades_today_count"] >= max_daily:
                    logger.warning("일일 체결 상한(%d) 도달 — 중단", max_daily)
                    break
                cluster_size = len(cluster)
                for sig in cluster:
                    full_sig = next(
                        (k for k in kept if k["datetime"] == sig["datetime"]),
                        sig,
                    )
                    trade = self.executor.execute_signal(
                        full_sig,
                        self.state["portfolio"],
                        cluster_size=cluster_size,
                    )
                    record = {
                        "datetime": full_sig["datetime"],
                        "side": full_sig["side"],
                        "signal_type": full_sig.get("signal_type"),
                        "price": full_sig["price"],
                        "bar_index": bar_idx,
                        "trade": trade.to_dict(),
                        "mtf_filter": full_sig.get("mtf_filter"),
                    }
                    executions.append(record)
                    if trade.executed:
                        self.state["trades_today_count"] += 1
            if bar_idx > last_bar:
                last_bar = bar_idx
                self.state["last_processed_bar_index"] = bar_idx
                if bar_signals:
                    self.state["last_processed_datetime"] = bar_signals[-1]["datetime"]

        pipeline = {
            "technique_id": gen["technique_id"],
            "raw_count": len(bar_candidates),
            "kept_count": len(kept),
            "rejected_count": len(filtered["rejected"]),
            "latest_bar_index": latest_bar,
        }

        now = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
        self.state["last_run_at"] = now
        if executions:
            self.state.setdefault("trade_history", []).extend(executions)

        report = {
            "generated_at": now,
            "mode": self.settings.ops_mode,
            "technique_id": pipeline["technique_id"],
            "raw_signals": pipeline["raw_count"],
            "filtered_signals": pipeline["kept_count"],
            "pending_bars": target_bars,
            "latest_bar_candidates": pipeline["raw_count"],
            "executions": executions,
            "portfolio": self.state["portfolio"],
            "trades_today_count": self.state["trades_today_count"],
            "last_processed_bar_index": self.state["last_processed_bar_index"],
        }

        save_state(self.settings.ops_state_json, self.state)
        self._save_report(report)
        return report

    def _save_report(self, report: dict[str, Any]) -> None:
        """최신 운영 리포트 저장."""
        path = self.settings.ops_report_json
        path.parent.mkdir(parents=True, exist_ok=True)
        with path.open("w", encoding="utf-8") as fp:
            json.dump(report, fp, ensure_ascii=False, indent=2)