"""威科夫分析入口：Cycle → Phase → Event → VP + Live（MULTI-CYCLE / LIVE-STRUCTURE）。

range.py 只产 TradingRange；Confirmed 走 events.py；Live 走 live.py。
cycles[0]=ACTIVE；禁止 cycles[-1] 取 active。
Execution 只消费 Confirmed（见 live.execution_signal_from_wyckoff）。
"""
from __future__ import annotations

from typing import Any, Dict, List, Optional

import pandas as pd

from .events import build_phases, detect_bias_and_events
from .live import analyze_live_structure
from .range import detect_trading_ranges
from .volume_profile import compute_volume_profile


def _fmt_time(v) -> Optional[str]:
	if v is None:
		return None
	if hasattr(v, "isoformat"):
		try:
			return v.isoformat()
		except Exception:
			pass
	return str(v)


def _empty(vp_bins: int) -> Dict[str, Any]:
	return {
		"cycles": [],
		"trading_range": None,
		"bias": "unknown",
		"phases": [],
		"events": [],
		"volume_profile": {"bins": [], "poc": None, "vah": None, "val": None, "bin_count": vp_bins},
		"volume_confirm": {"avg_volume": 0.0, "event_checks": {}},
		"live": None,
	}


def _confidence_for_confirmed(
	tr: Dict[str, Any],
	phases: List[Dict[str, Any]],
	events: List[Dict[str, Any]],
) -> Dict[str, float]:
	range_c = float(tr.get("range_confidence") or 0.5)
	labels = {p.get("phase") for p in phases}
	phase_c = 0.35
	if "A" in labels and "B" in labels:
		phase_c += 0.15
	if "C" in labels:
		phase_c += 0.2
	if "D" in labels or "E" in labels:
		phase_c += 0.15
	phase_c = min(0.95, phase_c)
	types = {e.get("type") for e in events}
	event_c = 0.25
	for t in ("Spring", "UTAD", "SOS", "SOW", "LPS", "LPSY"):
		if t in types:
			event_c += 0.12
	event_c = min(0.95, event_c)
	overall = 0.4 * range_c + 0.3 * phase_c + 0.3 * event_c
	return {
		"range": round(range_c, 3),
		"phase": round(phase_c, 3),
		"event": round(event_c, 3),
		"overall": round(overall, 3),
	}


def _build_cycle(
	work: pd.DataFrame,
	tr: Dict[str, Any],
	cycle_id: int,
	vp_bins: int,
) -> Dict[str, Any]:
	bias, events, volume_confirm = detect_bias_and_events(work, tr)
	phases = build_phases(work, tr, bias, events)
	vp = compute_volume_profile(
		work,
		int(tr["abs_start_idx"]),
		int(tr["abs_end_idx"]),
		bin_count=vp_bins,
	)
	for ev in events:
		ev["time"] = _fmt_time(ev.get("time"))
	for ph in phases:
		ph["start_time"] = _fmt_time(ph.get("start_time"))
		ph["end_time"] = _fmt_time(ph.get("end_time"))

	is_active = cycle_id == 0
	trading_range = {
		"start_time": _fmt_time(tr.get("start_time")),
		"end_time": _fmt_time(tr.get("end_time")),
		"high": float(tr["high"]),
		"low": float(tr["low"]),
		"mid": float(tr["mid"]),
		"active": bool(is_active),
		"bars": int(tr.get("bars", 0)),
	}
	conf = _confidence_for_confirmed(tr, phases, events)

	# Live 层：仅 ACTIVE 周期做推演；历史周期归档为 COMPLETED
	if is_active:
		live = analyze_live_structure(
			work, tr, confirmed_events=events, confirmed_phases=phases, bias=bias,
		)
		lifecycle = live.get("lifecycle") or "FORMING"
	else:
		live = None
		lifecycle = "COMPLETED"

	return {
		"id": int(cycle_id),
		"role": "latest" if is_active else "historical",
		# MULTI-CYCLE：时间线角色
		"status": "ACTIVE" if is_active else "HISTORICAL",
		# LIVE-STRUCTURE：生命周期
		"lifecycle": lifecycle,
		"direction": "latest" if is_active else "historical",
		"period": {
			"start_time": _fmt_time(tr.get("start_time")),
			"end_time": _fmt_time(tr.get("end_time")),
			"bars": int(tr.get("bars", 0)),
		},
		"confidence": conf,
		"trading_range": trading_range,
		"bias": bias,
		# 兼容旧读法：顶层 phases/events = confirmed
		"phases": phases,
		"events": events,
		"confirmed": {
			"phases": phases,
			"events": events,
			"volume_confirm": volume_confirm,
		},
		"live": live,
		"volume_profile": vp,
		"volume_confirm": volume_confirm,
	}


def analyze_wyckoff(
	df: pd.DataFrame,
	lookback: int = 120,
	vp_bins: int = 50,
	min_bars: int = 24,
	atr_mult: float = 1.2,
	range_start_time=None,
	prefer_start_time=None,
	max_cycles: int = 8,
) -> Dict[str, Any]:
	"""
	多周期威科夫分析。
	cycles[0] = ACTIVE；顶层 phases/events 只镜像 Confirmed。
	顶层 live 镜像 cycles[0].live。
	"""
	empty = _empty(vp_bins)
	if df is None or len(df) < 30:
		return empty
	if not all(c in df.columns for c in ("open", "high", "low", "close")):
		return empty
	work = df.copy()
	if "volume" not in work.columns:
		work["volume"] = 1.0

	trs = detect_trading_ranges(
		work,
		lookback=lookback,
		min_bars=max(8, int(min_bars)),
		atr_mult=atr_mult,
		max_cycles=max(1, min(8, int(max_cycles))),
		prefer_start_time=prefer_start_time,
		range_start_time=range_start_time,
	)
	if not trs:
		return empty

	cycles: List[Dict[str, Any]] = []
	for i, tr in enumerate(trs):
		cycles.append(_build_cycle(work, tr, cycle_id=i, vp_bins=vp_bins))

	active = cycles[0]
	return {
		"cycles": cycles,
		"trading_range": active["trading_range"],
		"bias": active["bias"],
		"phases": active["confirmed"]["phases"],
		"events": active["confirmed"]["events"],
		"volume_profile": active["volume_profile"],
		"volume_confirm": active["volume_confirm"],
		"live": active.get("live"),
		"lifecycle": active.get("lifecycle"),
	}