"""
Pydantic schemas — typed contracts between every agent.
No free-text. Every LLM output is schema-constrained.
"""
from pydantic import BaseModel, Field
from typing import Optional
from enum import Enum


class Neutralization(str, Enum):
    SECTOR = "sector"
    INDUSTRY = "industry"
    SUBINDUSTRY = "subindustry"
    NONE = "none"


class AnomalyTag(str, Enum):
    PEAD = "pead"
    VALUE = "value"
    MOMENTUM = "momentum"
    REVERSAL = "reversal"
    LOW_VOL = "low_vol"
    QUALITY = "quality"
    LIQUIDITY = "liquidity"
    SENTIMENT = "sentiment"
    ANALYST = "analyst"
    OPTION_SURFACE = "option_surface"
    SOCIAL = "social"
    FUNDAMENTAL = "fundamental"
    TECHNICAL = "technical"
    EVENT = "event"
    OTHER = "other"


class Component(BaseModel):
    """A single component of a multi-factor alpha."""
    name: str = Field(description="Descriptive name for this component")
    fields: list[str] = Field(description="BRAIN data fields used")
    operators: list[str] = Field(description="BRAIN operators applied")
    horizon_days: int = Field(ge=1, le=252, description="Lookback horizon")
    weight: float = Field(ge=-2.0, le=2.0, description="Weight in composite")
    sign_direction: str = Field(description="Expected cross-sectional sign: 'long_high' or 'long_low'")


class Blueprint(BaseModel):
    """Output of the Hypothesis Hunter. A structured factor idea."""
    theme: str = Field(description="High-level theme/anomaly category")
    archetype: str = Field(description="Known archetype name or 'novel'")
    components: list[Component] = Field(min_length=1, max_length=5)
    neutralization: Neutralization
    decay: int = Field(ge=0, le=20, default=5)
    novelty_claim: str = Field(min_length=10, description="Why this is different from existing alphas")
    academic_anchor: Optional[str] = Field(default=None, description="arXiv ID or DOI")
    anomaly_tag: AnomalyTag


class Expression(BaseModel):
    """Output of the Expression Compiler. A valid BRAIN expression."""
    expression: str = Field(min_length=10, description="The BRAIN expression string")
    fields_used: list[str]
    operators_used: list[str]
    archetype_used: str = Field(description="Which template/archetype was used")


class LintResult(BaseModel):
    """Output of the Static Lint layer."""
    passed: bool
    errors: list[str] = Field(default_factory=list)
    warnings: list[str] = Field(default_factory=list)


class SignSweepResult(BaseModel):
    """Output of the sign direction sweep."""
    pos_sharpe: float
    neg_sharpe: float
    verdict: str = Field(description="'pos' or 'neg' — which direction works")
    info_value: float = Field(description="abs(pos - neg), higher = more signal")


class BrainMetrics(BaseModel):
    """Metrics harvested from BRAIN simulation."""
    alpha_id: str
    sharpe_full: float
    sharpe_is: float
    sharpe_os: float
    fitness: float
    turnover: float
    returns: float
    max_drawdown: float
    yearly_sharpe: list[float]
    yearly_returns: list[float]
    margin_pct: Optional[float] = None
    long_count: Optional[int] = None
    short_count: Optional[int] = None


class Verdict(str, Enum):
    PROMOTE = "promote"
    ITERATE = "iterate"
    KILL = "kill"


class CrowdScoutResult(BaseModel):
    """Output of the Crowd Scout agent."""
    max_corr_to_library: float
    is_thematic_duplicate: bool
    anomaly_already_saturated: bool
    verdict: Verdict
    reason: str


class SurgeonResult(BaseModel):
    """Output of the Performance Surgeon agent."""
    regime_dependent: bool
    decay_detected: bool
    sign_error_likely: bool
    dominant_regime: Optional[str] = None
    iteration_suggestion: str
    verdict: Verdict
    reason: str


class GatekeeperMemo(BaseModel):
    """Output of the Production Gatekeeper (Bigfish)."""
    go_no_go: bool
    confidence: float = Field(ge=0.0, le=1.0)
    strengths: list[str]
    weaknesses: list[str]
    risks: list[str]
    recommendation: str
    full_memo: str