# Copyright (c) Meta Platforms, Inc. and affiliates.
# All rights reserved.
#
# This source code is licensed under the BSD-style license found in the
# LICENSE file in the root directory of this source tree.

"""
Data models for the Ask Answer Env Environment.

A slot-filling environment where agents must decide between asking
clarifying questions or answering early.
"""

from typing import Literal, Optional

from pydantic import BaseModel, Field

from openenv.core.env_server.types import Action, Observation


class AskAnswerAction(Action):
    """
    Action for the Ask Answer Env environment.
    
    Two action types:
    - "ask": Ask about a specific slot (city, date, budget, or style)
    - "answer": Provide final answer with slot values
    """

    type: Literal["ask", "answer"] = Field(..., description="Action type: 'ask' or 'answer'")
    slot: Optional[Literal["city", "date", "budget", "style"]] = Field(
        default=None, description="Slot to ask about (only for 'ask' type)"
    )
    city: Optional[str] = Field(default=None, description="City answer (only for 'answer' type)")
    date: Optional[str] = Field(default=None, description="Date answer (only for 'answer' type)")
    budget: Optional[str] = Field(default=None, description="Budget answer (only for 'answer' type)")
    style: Optional[str] = Field(default=None, description="Style answer (only for 'answer' type)")


class KnownSlots(BaseModel):
    """Slots that have been revealed to the agent."""

    city: Optional[str] = Field(default=None, description="Known city value")
    date: Optional[str] = Field(default=None, description="Known date value")
    budget: Optional[str] = Field(default=None, description="Known budget value")
    style: Optional[str] = Field(default=None, description="Known style value")


class AskAnswerObservation(Observation):
    """Observation from the Ask Answer Env environment."""

    prompt: str = Field(default="Plan a short trip for me.", description="The user prompt")
    known: KnownSlots = Field(default_factory=KnownSlots, description="Currently known slot values")
    steps_left: int = Field(default=3, description="Number of steps remaining")
    
    # Correctness info (populated when done=True after ANSWER action)
    core_correct_count: Optional[int] = Field(
        default=None, description="Number of core slots correct (0-3), None if not answered yet"
    )