# 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 ETL Pipeline Fixer Environment.
"""

from typing import Literal, Optional

from openenv.core.env_server.types import Action, Observation
from pydantic import Field, model_validator

# ---------------------------------------------------------------------------
# ── Observation ─────────────────────────────────────────────────────────────
# ---------------------------------------------------------------------------

class EtlObservation(Observation):
    console_logs: str = Field(default="", description="Combined stdout / stderr.")
    current_script_content: str = Field(default="", description="Full text of script.")
    db_state_summary: str = Field(default="", description="Summary of target DB.")

# ---------------------------------------------------------------------------
# ── Action ──────────────────────────────────────────────────────────────────
# ---------------------------------------------------------------------------

class EtlAction(Action):
    action_type: Literal["edit_code", "run_pipeline", "query_db"]
    filepath: Optional[str] = Field(default=None, min_length=1)
    target_line: Optional[int] = Field(default=None, ge=1)
    new_code: Optional[str] = Field(default=None)
    timeout_override_s: Optional[float] = Field(default=None, ge=0.1)
    sql_string: Optional[str] = Field(default=None, min_length=1)
    max_rows: int = Field(default=50, ge=1, le=1000)

    @model_validator(mode="after")
    def _validate_required_fields(self):
        if self.action_type == "edit_code":
            if self.filepath is None or self.target_line is None or self.new_code is None:
                raise ValueError("edit_code requires filepath, target_line, and new_code")
        elif self.action_type == "query_db":
            if self.sql_string is None:
                raise ValueError("query_db requires sql_string")
        return self


class EditCodeAction(EtlAction):
    action_type: Literal["edit_code"] = Field(default="edit_code")
    filepath: str = Field(..., min_length=1)
    target_line: int = Field(..., ge=1)
    new_code: str = Field(...)


class RunPipelineAction(EtlAction):
    action_type: Literal["run_pipeline"] = Field(default="run_pipeline")
    timeout_override_s: Optional[float] = Field(default=None, ge=0.1)


class QueryDbAction(EtlAction):
    action_type: Literal["query_db"] = Field(default="query_db")
    sql_string: str = Field(..., min_length=1)
    max_rows: int = Field(default=50, ge=1, le=1000)

# ---------------------------------------------------------------------------
# ── Reward ───────────────────────────────────────────────────────────────────
# ---------------------------------------------------------------------------

class EtlReward:
    def __init__(self, value: float = 0.0) -> None:
        if not (0.0 <= value <= 1.0):
            raise ValueError(f"Reward must be in [0.0, 1.0], got {value!r}.")
        self._value = float(value)

    @property
    def value(self) -> float:
        return self._value

    def __float__(self) -> float:
        return self._value