"""Wyckoff Screener domain models — Architecture v1.0 frozen contracts."""

from __future__ import annotations

from dataclasses import dataclass, field
from datetime import date, datetime
from enum import Enum
from typing import Any, Optional


class WyckoffCycle(str, Enum):
    ACCUMULATION = "Accumulation"
    RE_ACCUMULATION = "ReAccumulation"
    MARKUP = "Markup"
    DISTRIBUTION = "Distribution"
    RE_DISTRIBUTION = "ReDistribution"
    MARKDOWN = "Markdown"
    UNKNOWN = "Unknown"


class WyckoffPhase(str, Enum):
    A = "A"
    B = "B"
    C = "C"
    D = "D"
    E = "E"
    NONE = "None"


class WyckoffEvent(str, Enum):
    PS = "PS"
    SC = "SC"
    AR = "AR"
    ST = "ST"
    SPRING = "Spring"
    TEST = "Test"
    SOS = "SOS"
    LPS = "LPS"
    JUMP = "Jump"
    BACKUP = "Backup"
    BC = "BC"
    UTAD = "UTAD"
    SOW = "SOW"
    LPSY = "LPSY"
    NONE = "None"


class DecisionSignal(str, Enum):
    STRONG_BUY = "StrongBuy"
    BUY = "Buy"
    WATCH = "Watch"
    AVOID = "Avoid"
    SELL = "Sell"


class RiskLevel(str, Enum):
    LOW = "Low"
    MEDIUM = "Medium"
    HIGH = "High"


@dataclass
class EngineResult:
    """Unified result envelope for every Wyckoff engine (v1.0 contract)."""

    name: str
    version: str = "1.0.0"
    confidence: float = 0.0
    score: float = 0.0
    reasons: list[str] = field(default_factory=list)
    warnings: list[str] = field(default_factory=list)
    metrics: dict[str, Any] = field(default_factory=dict)
    payload: dict[str, Any] = field(default_factory=dict)

    def to_dict(self) -> dict[str, Any]:
        return {
            "name": self.name,
            "version": self.version,
            "confidence": self.confidence,
            "score": self.score,
            "reasons": self.reasons,
            "warnings": self.warnings,
            "metrics": self.metrics,
            "payload": self.payload,
        }


@dataclass
class OHLCVFrame:
    """In-memory OHLCV for one symbol one timeframe. Engines never touch DB."""

    ts_code: str
    timeframe: str  # "1d" | "1w" | "1M"
    trade_dates: list[date]
    open: list[float]
    high: list[float]
    low: list[float]
    close: list[float]
    volume: list[float]
    amount: list[float] = field(default_factory=list)

    def __len__(self) -> int:
        return len(self.close)

    @property
    def empty(self) -> bool:
        return len(self.close) == 0


@dataclass
class WyckoffScanRow:
    """Persisted scan row for wyckoff_scan table."""

    trade_date: date
    ts_code: str
    name: str = ""
    industry: str = ""
    engine_version: str = "v1.0.0"

    m_cycle: str = WyckoffCycle.UNKNOWN.value
    cycle_confidence: float = 0.0
    trend_score: float = 0.0

    w_cycle: str = WyckoffCycle.UNKNOWN.value
    w_phase: str = WyckoffPhase.NONE.value
    w_current_event: str = WyckoffEvent.NONE.value
    w_recent_events_json: str = "[]"
    phase_confidence: float = 0.0
    structure_score: float = 0.0

    d_current_event: str = WyckoffEvent.NONE.value
    d_recent_events_json: str = "[]"
    event_confidence: float = 0.0
    entry_score: float = 0.0

    entry: Optional[float] = None
    stop: Optional[float] = None
    target1: Optional[float] = None
    target2: Optional[float] = None
    rr: Optional[float] = None

    alignment: float = 0.0
    stars: int = 1
    decision_signal: str = DecisionSignal.WATCH.value
    signal_confidence: float = 0.0
    overall_confidence: float = 0.0
    overall_score: float = 0.0
    risk: str = RiskLevel.MEDIUM.value
    reasons_json: str = "[]"

    feature_snapshot_json: str = "{}"
    markers_json: str = "[]"
    scanned_at: datetime = field(default_factory=datetime.now)