"""
V2 Core Types — RunMode, extended PurposeScore, memory scoping.

Backward compatible: all V1 types remain unchanged. V2 additions are new
classes or optional fields on existing ones.
"""
from __future__ import annotations

from enum import Enum
from dataclasses import dataclass, field
from typing import Any


class RunMode(Enum):
    """
    Controls what the framework is allowed to mutate during a run.

    learning_train:      Full read/write. Memories can be created, Q-values updated,
                         heuristics distilled. This is where the agent learns.

    learning_validation: Read existing memories, but writes go to a staging area.
                         Used to validate whether new memories actually help before promoting.

    eval_test:           Pure evaluation. NO memory writes, NO heuristic promotion,
                         NO rubric mutation. The agent runs with whatever it has learned.
                         This is the only mode whose numbers you can trust.
    """
    LEARNING_TRAIN = "learning_train"
    LEARNING_VALIDATION = "learning_validation"
    EVAL_TEST = "eval_test"

    @property
    def allows_memory_write(self) -> bool:
        return self == RunMode.LEARNING_TRAIN

    @property
    def allows_staging_write(self) -> bool:
        return self in (RunMode.LEARNING_TRAIN, RunMode.LEARNING_VALIDATION)

    @property
    def is_eval(self) -> bool:
        return self == RunMode.EVAL_TEST


@dataclass
class MemoryScope:
    """
    Scoping metadata for a memory. Determines which contexts a memory is
    eligible to be retrieved in.
    """
    agent_roles: list[str] = field(default_factory=list)     # e.g. ["coder", "tester"]
    tool_names: list[str] = field(default_factory=list)      # e.g. ["python_exec"]
    task_categories: list[str] = field(default_factory=list)  # e.g. ["coding", "debugging"]
    team_protocols: list[str] = field(default_factory=list)  # e.g. ["code_review_pipeline"]
    user_id: str = ""                                        # scoped to a specific user

    def matches(self, query_scope: "MemoryScope") -> bool:
        """Check if this scope overlaps with a query scope. Empty = matches all."""
        if self.agent_roles and query_scope.agent_roles:
            if not set(self.agent_roles) & set(query_scope.agent_roles):
                return False
        if self.tool_names and query_scope.tool_names:
            if not set(self.tool_names) & set(query_scope.tool_names):
                return False
        if self.task_categories and query_scope.task_categories:
            if not set(self.task_categories) & set(query_scope.task_categories):
                return False
        if self.user_id and query_scope.user_id:
            if self.user_id != query_scope.user_id:
                return False
        return True


@dataclass
class PurposeScoreV2:
    """
    Extended PurposeScore with evidence tracking and hack detection.

    Backward compatible: original PurposeScore fields are preserved.
    V2 additions are evidence_ids, components, rubric_version, hack_flags.
    """
    phi_before: float
    phi_after: float
    delta: float
    reasoning: str
    evidence: str
    confidence: float

    # V2 additions
    evidence_ids: list[str] = field(default_factory=list)
    components: dict[str, float] = field(default_factory=dict)
    rubric_version: str = "v1"
    hack_flags: list[str] = field(default_factory=list)

    @property
    def improved(self) -> bool:
        return self.delta > 0.0

    @property
    def is_suspicious(self) -> bool:
        return len(self.hack_flags) > 0