from typing import Dict, List, Optional, Any
from pydantic import BaseModel, Field, constr
from datetime import datetime


class PoeticCert(BaseModel):
    """Compact PoeticCert schema.

    Fields:
    - invariants: free-form list of invariant descriptors (strings or structured)
    - resource_limits: optional resource constraints
    - replica_intent_hash: hex string hash of the intent being certified
    - expected_receipt: optional acceptance witness
    - attester_signatures: mapping signer_id -> signature (base64 or hex)
    - issued_at: timestamp
    """

    invariants: List[Any]
    resource_limits: Optional[Dict[str, Any]] = None
    replica_intent_hash: constr(min_length=1)
    expected_receipt: Optional[Dict[str, Any]] = None
    attester_signatures: Dict[str, str] = Field(default_factory=dict)
    issued_at: datetime = Field(default_factory=datetime.utcnow)


class TraceEvent(BaseModel):
    seq: int
    timestamp: datetime
    message: str
    meta: Optional[Dict[str, Any]] = None


class ReplayBundle(BaseModel):
    """Deterministic ReplayBundle reference format.

    Fields:
    - trace: sequence of TraceEvent
    - monitors: signed attestations produced by monitors
    - evidence_root: a top-level digest (hex) that represents merkle/root of evidence
    - artifacts: optional dict of artifact_name -> digest
    """

    trace: List[TraceEvent]
    monitors: Dict[str, str] = Field(default_factory=dict)
    evidence_root: constr(min_length=1)
    artifacts: Optional[Dict[str, str]] = None


class BondRecord(BaseModel):
    escrow_id: str
    issuer: str
    stake_amount: float
    policy_hash: Optional[str] = None
    ttl: Optional[datetime] = None
    created_at: datetime = Field(default_factory=datetime.utcnow)
    status: str = "active"  # active, settled, cancelled


class ClaimSubmission(BaseModel):
    claim_id: str
    evidence_root: str
    claimant: str
    timestamp: datetime = Field(default_factory=datetime.utcnow)
    details: Optional[Dict[str, Any]] = None