"""Pydantic models for the Feature Flag Cleanup environment."""

from typing import Any, Dict, List, Optional
from pydantic import BaseModel, Field, ConfigDict


class FlagAction(BaseModel):
    """Action the agent takes on a feature flag."""
    model_config = ConfigDict(extra="forbid", validate_assignment=True)

    action: str = Field(
        ...,
        description="One of: remove, keep, deprecate, escalate, investigate",
        pattern="^(remove|keep|deprecate|escalate|investigate)$",
    )
    reasoning: str = Field(
        default="",
        description="Optional reasoning for the action",
    )
    metadata: Dict[str, Any] = Field(default_factory=dict)


class FlagObservation(BaseModel):
    """Observation presented to the agent for each feature flag."""
    model_config = ConfigDict(extra="forbid", validate_assignment=True)

    flag_name: str = Field(..., description="Name of the feature flag")
    description: str = Field(..., description="What the flag controls")
    rollout_percentage: float = Field(..., ge=0.0, le=1.0, description="Current rollout 0.0-1.0")
    age_days: int = Field(..., ge=0, description="Days since flag was created")
    last_modified_days: int = Field(..., ge=0, description="Days since last modification")
    owner: str = Field(..., description="Team or person who owns the flag")
    owner_active: bool = Field(..., description="Whether the owner is still active")
    num_code_references: int = Field(..., ge=0, description="Number of code references")
    has_dependencies: bool = Field(..., description="Whether other flags depend on this one")
    dependent_flags: List[str] = Field(default_factory=list, description="Flags depending on this one")
    is_kill_switch: bool = Field(default=False, description="Emergency kill switch flag")
    has_active_incident: bool = Field(default=False, description="Active incident involving this flag")
    usage_last_30d: int = Field(default=0, ge=0, description="Flag evaluations in last 30 days")
    in_active_experiment: bool = Field(default=False, description="Part of a running A/B test")
    services: List[str] = Field(default_factory=list, description="Services referencing this flag")
    task_id: str = Field(..., description="Current task identifier")
    flags_remaining: int = Field(..., ge=0, description="Flags left to process")

    # Rich context fields (Weakness #2 fix: richer observations)
    code_snippet: str = Field(default="", description="Code snippet showing how the flag is used")
    last_commit_message: str = Field(default="", description="Last git commit that modified this flag")
    pr_context: str = Field(default="", description="Context from the PR that introduced this flag")
    related_incidents: List[str] = Field(default_factory=list, description="Past incident IDs involving this flag")
    investigation_notes: str = Field(default="", description="Notes revealed by investigate action")

    # Cascading context (Weakness #1 fix: decisions affect future flags)
    previously_removed: List[str] = Field(default_factory=list, description="Flags already removed this episode")
    cascade_warning: str = Field(default="", description="Warning if a dependency was removed earlier")

    done: bool = Field(default=False)
    reward: Optional[float] = Field(default=None)
    metadata: Dict[str, Any] = Field(default_factory=dict)


class FlagState(BaseModel):
    """Internal state of the environment."""
    model_config = ConfigDict(extra="allow", validate_assignment=True)

    episode_id: Optional[str] = Field(default=None)
    step_count: int = Field(default=0, ge=0)
    task_id: str = Field(default="easy")
    current_flag_index: int = Field(default=0, ge=0)
    total_flags: int = Field(default=0, ge=0)
    cumulative_reward: float = Field(default=0.0)
    flags_processed: List[str] = Field(default_factory=list)
    flags_removed: List[str] = Field(default_factory=list)
    investigation_count: int = Field(default=0, ge=0)