from typing import Any, Dict, List, Literal, Optional

from pydantic import BaseModel, Field


TaskId = Literal["easy", "medium", "hard"]
ActionType = Literal["submit_finding", "flag_human_review", "noop"]


class AuditFinding(BaseModel):
    document_id: str = Field(description="ID of the document containing potential violation")
    violation_type: str = Field(description="Violation category")
    evidence: List[str] = Field(default_factory=list, description="Supporting document IDs")
    confidence: float = Field(ge=0.0, le=1.0)


class AuditAction(BaseModel):
    action_type: ActionType
    task_id: TaskId
    finding: Optional[AuditFinding] = None
    note: str = ""


class AuditObservation(BaseModel):
    session_id: str
    task_id: TaskId
    documents: List[Dict[str, Any]]
    findings_submitted: int
    steps_remaining: int
    current_partial_score: float


class AuditReward(BaseModel):
    value: float
    normalized: float = Field(ge=0.0, le=1.0)
    reason: str


class StepResult(BaseModel):
    observation: AuditObservation
    reward: AuditReward
    done: bool
    info: Dict[str, Any] = Field(default_factory=dict)


class EnvState(BaseModel):
    session_id: str
    task_id: TaskId
    steps_remaining: int
    findings_submitted: int
    partial_score: float
    found_truth_keys: List[str]