"""
engine.py - 缠论管线封装：DataFrame → KLU → KLC → BI → SEG → ZS → BSP。

复用 ~/Project/Chan/ 下的 TF_DF 模块，管线步骤对齐 TF_DF.get_bsp_state()。
"""
import sys
import os
from typing import List, Optional

_PARENT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
if _PARENT not in sys.path:
    sys.path.insert(0, _PARENT)

import pandas as pd
from ChanEnum import (
    Chan_BSP_DIR, Chan_BSP_TYPE, Chan_KLC_FX, Chan_BI_DIR,
    Chan_ZS_DIR,
)
from ChanBSP import ChanBSP
from ChanBI import ChanBI

# 仅导入类，不触发 TF_DF.__init__
from TF_DF import TF_DF as _TF_DF_Class


class ChanEngine:
    """缠论管线，对齐 TF_DF.get_bsp_state() 的调用顺序。"""

    def __init__(self, df: pd.DataFrame):
        if df.empty or len(df) < 50:
            raise ValueError("DataFrame 至少需要 50 根 K 线")

        if "date" not in df.columns and "timestamp" in df.columns:
            df["date"] = df["timestamp"]

        self.df = df
        self._tf = _TF_DF_Class.__new__(_TF_DF_Class)  # 不调用 __init__

        # Step 0: 添加 TA 指标 (MACD/EMA/BB/RSI)
        self._df_with_indicators = self._tf.add_indicators(df.copy())

        # Step 1: KLU — get_klu_list → get_kl_data → cal_kl_data
        self.klu_list = self._tf.get_klu_list(self._df_with_indicators)

        # Step 2: KLC — 内部已含 ChanMACD.cal_macd_state() + cal_trend()
        self.klc_list = self._tf.get_klc_list(self.klu_list)

        # Step 3: BI (stroke)
        self.bi_list = self._tf.cal_bi_list(self.klc_list)

        # Step 4: SEG (segment)
        self.seg_list = self._tf.get_seg_list(self.bi_list)

        # Step 5: ZS — cal_bi_zs(seg_list) 对齐 get_bsp_state（从线段计算笔中枢）
        self.bi_zs_list: List = self._tf.cal_bi_zs(self.seg_list)

        # Step 6: BSP (buy/sell points)
        self.bsp_list: List[ChanBSP] = self._tf.find_all_bsp(
            self.bi_list, self.bi_zs_list
        )

    def get_second_last_bi(self) -> Optional[ChanBI]:
        """获取倒数第二笔（最新确认的笔）。"""
        confirmed = [b for b in self.bi_list if b.is_sure]
        if len(confirmed) >= 2:
            return confirmed[-2]
        elif len(confirmed) == 1:
            return confirmed[-1]
        return None

    def get_bsp_for_bi(self, bi: ChanBI) -> Optional[ChanBSP]:
        """检查某个 Bi 的 end_klc 是否是买卖点。"""
        if bi is None or not bi.is_sure:
            return None
        klc = bi.end_klc
        if klc is None:
            return None
        if klc.bsp and klc.bsp_type != Chan_BSP_TYPE.NONE:
            for bsp in self.bsp_list:
                if bsp.klc is klc:
                    return bsp
        return None

    # ── 格式化 ──

    @staticmethod
    def _bsp_type_name(t: Chan_BSP_TYPE) -> str:
        import ChanEnum
        names = {
            Chan_BSP_TYPE.B1: "一类买点(B1)",
            Chan_BSP_TYPE.B2: "二类买点(B2)",
            Chan_BSP_TYPE.B3: "三类买点(B3)",
            Chan_BSP_TYPE.S1: "一类卖点(S1)",
            Chan_BSP_TYPE.S2: "二类卖点(S2)",
            Chan_BSP_TYPE.S3: "三类卖点(S3)",
        }
        return names.get(t, str(t))

    @staticmethod
    def _bi_dir_name(d) -> str:
        return "⬆️ 向上" if d == Chan_BI_DIR.UP else "⬇️ 向下"

    @staticmethod
    def _fx_strength_name(klc_fx_type) -> str:
        import ChanEnum
        names = {
            Chan_KLC_FX.TOP0: "TOP0(弱)", Chan_KLC_FX.TOP1: "TOP1(标准)",
            Chan_KLC_FX.TOP2: "TOP2(强)", Chan_KLC_FX.TOP3: "TOP3(二类)",
            Chan_KLC_FX.TOP4: "TOP4(BB上轨)", Chan_KLC_FX.TOP5: "TOP5",
            Chan_KLC_FX.TOP6: "TOP6(高位空)", Chan_KLC_FX.TOP7: "TOP7(背驰)",
            Chan_KLC_FX.TOP8: "TOP8(信号线)",
            Chan_KLC_FX.BOTTOM0: "BOTTOM0(弱)", Chan_KLC_FX.BOTTOM1: "BOTTOM1(标准)",
            Chan_KLC_FX.BOTTOM2: "BOTTOM2(强)", Chan_KLC_FX.BOTTOM3: "BOTTOM3(二类)",
            Chan_KLC_FX.BOTTOM4: "BOTTOM4(BB下轨)", Chan_KLC_FX.BOTTOM5: "BOTTOM5(零轴下)",
            Chan_KLC_FX.BOTTOM6: "BOTTOM6(高位空)", Chan_KLC_FX.BOTTOM7: "BOTTOM7(背驰)",
            Chan_KLC_FX.BOTTOM8: "BOTTOM8(信号线)",
        }
        return names.get(klc_fx_type, f"UNKNOWN({klc_fx_type})")

    @staticmethod
    def _utc_to_cst(time_str: str) -> str:
        """UTC 时间字符串 → 东八区 (UTC+8)。"""
        from datetime import datetime, timedelta, timezone
        dt = datetime.fromisoformat(str(time_str))
        if dt.tzinfo is None:
            dt = dt.replace(tzinfo=timezone.utc)
        cst = dt.astimezone(timezone(timedelta(hours=8)))
        return cst.strftime("%Y-%m-%d %H:%M:%S CST")

    def format_bsp_detail(self, bsp: ChanBSP) -> str:
        bi = bsp.bi
        klc = bsp.klc
        bsp_type = bsp.type
        bsp_dir = bsp.dir

        emoji = "🟢" if bsp_dir == Chan_BSP_DIR.BUY else "🔴"
        dir_label = "买点" if bsp_dir == Chan_BSP_DIR.BUY else "卖点"

        lines = [
            f"{emoji} [{dir_label}] {self._bsp_type_name(bsp_type)} — <b>BTC/USDT 1m</b>",
            "",
            f"⏰ 确认: <code>{self._utc_to_cst(klc.end_time)}</code>",
            f"💰 价格: <b>{klc.close:.2f}</b>",
            f"📐 笔方向: {self._bi_dir_name(bi.dir)}",
            f"📏 笔高度: ${bi.height:.2f}  宽度: {bi.width}K  斜率: {bi.slop:.2f}",
            f"🔩 分型强度: {self._fx_strength_name(klc.klc_fx_type)}",
        ]

        if bsp.zs:
            zs = bsp.zs
            zs_dir = "UP" if hasattr(zs, 'dir') and hasattr(Chan_ZS_DIR, 'UP') and zs.dir == Chan_ZS_DIR.UP else "DOWN"
            lines.append(f"🏠 中枢: {zs.zd:.2f} – {zs.zg:.2f} ({zs_dir}, #{getattr(zs, 'index', 0) + 1})")

        if bsp.type in (Chan_BSP_TYPE.B1, Chan_BSP_TYPE.S1):
            lines.append("📊 MACD背驰: 有 (离开段能量 < 进入段)")

        if hasattr(klc, 'ema_status') and klc.ema_status:
            ema52 = klc.ema_status.get('ema52', {})
            if ema52:
                pos = str(ema52.get('pos', '?'))
                lines.append(f"📈 EMA52: {pos}  (值: {klc.ema52:.2f})")

        lines.append(f"📋 KLC状态: {klc.klc_state}")

        if bi.pre:
            prev = bi.pre
            lines.extend([
                "────",
                f"⬅️ 前一笔: {self._bi_dir_name(prev.dir)} "
                f"高度: ${prev.height:.2f}  宽度: {prev.width}K",
            ])

        return "\n".join(lines)