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"""ClaudeCode β€” Claude Code CLI runner with ACE learning."""

from __future__ import annotations

from collections.abc import Iterable, Sequence
from pathlib import Path
from typing import Any, Optional

from pydantic_ai.settings import ModelSettings

from pipeline import Pipeline
from pipeline.protocol import SampleResult, StepProtocol

from ..core.context import ACEStepContext, SkillbookView
from ..core.skillbook import Skillbook
from ..integrations import wrap_skillbook_context
from ..integrations.claude_code import ClaudeCodeExecuteStep, ClaudeCodeToTrace
from ..protocols import (
    DeduplicationConfig,
    DeduplicationManagerLike,
    ReflectorLike,
    SkillManagerLike,
)
from ..steps import learning_tail
from .base import ACERunner


class ClaudeCode(ACERunner):
    """Claude Code CLI with ACE learning pipeline.



    INJECT skillbook β†’ EXECUTE Claude Code β†’ LEARN (Reflect β†’ Tag β†’ Update β†’ Apply).



    Two construction paths:



    1. ``ClaudeCode.from_roles(reflector, skill_manager, working_dir=..., ...)``

       β€” pre-built roles.

    2. ``ClaudeCode.from_model(working_dir=..., ace_model="gpt-4o-mini", ...)``

       β€” builds ACE roles from a model string.



    Example::



        runner = ClaudeCode.from_model(working_dir="./my_project")

        results = runner.run([

            "Add unit tests for utils.py",

            "Refactor the auth module",

        ])

        runner.save("code_expert.json")

    """

    @classmethod
    def build_steps(

        cls,

        *,

        reflector: ReflectorLike,

        skill_manager: SkillManagerLike,

        skillbook: Skillbook | None = None,

        skillbook_path: Optional[str] = None,

        working_dir: Optional[str] = None,

        timeout: int = 600,

        model: Optional[str] = None,

        allowed_tools: Optional[list[str]] = None,

        dedup_config: Optional[DeduplicationConfig] = None,

        dedup_manager: DeduplicationManagerLike | None = None,

        dedup_interval: int = 10,

        checkpoint_dir: str | Path | None = None,

        checkpoint_interval: int = 10,

    ) -> list[StepProtocol]:
        """Return the steps that ``from_roles()`` would compose.



        Use this to inspect, modify, or extend the pipeline before

        constructing it yourself::



            steps = ClaudeCode.build_steps(reflector=r, skill_manager=sm, ...)

            steps.insert(2, MyCustomStep())

            pipe = Pipeline(steps)

            runner = ACERunner(pipeline=pipe, skillbook=skillbook)



        Args:

            reflector: Reflector role for analysing execution traces.

            skill_manager: SkillManager role for update operations.

            skillbook: Starting skillbook.  Creates an empty one if ``None``.

            skillbook_path: Path to load skillbook from.

            working_dir: Directory where Claude Code executes.

            timeout: Execution timeout in seconds.

            model: Optional Claude model override.

            allowed_tools: Optional list of allowed tools.

            dedup_config: Deduplication configuration.

            dedup_manager: Optional pre-built deduplication manager.

            dedup_interval: Samples between deduplication runs.

            checkpoint_dir: Directory for checkpoint files.

            checkpoint_interval: Samples between checkpoint saves.

        """
        # Resolve skillbook
        if skillbook_path:
            skillbook = Skillbook.load_from_file(skillbook_path)
        elif skillbook is None:
            skillbook = Skillbook()

        # Resolve dedup manager
        dm = dedup_manager
        if dm is None and dedup_config is not None:
            from ..deduplication import DeduplicationManager

            dm = DeduplicationManager(dedup_config)

        steps: list[StepProtocol[ACEStepContext]] = [
            ClaudeCodeExecuteStep(
                working_dir=working_dir,
                timeout=timeout,
                model=model,
                allowed_tools=allowed_tools,
            ),
            ClaudeCodeToTrace(),
            *learning_tail(
                reflector,
                skill_manager,
                skillbook,
                dedup_manager=dm,
                dedup_interval=dedup_interval,
                checkpoint_dir=checkpoint_dir,
                checkpoint_interval=checkpoint_interval,
            ),
        ]
        return steps

    @classmethod
    def from_roles(

        cls,

        *,

        reflector: ReflectorLike,

        skill_manager: SkillManagerLike,

        skillbook: Skillbook | None = None,

        skillbook_path: Optional[str] = None,

        working_dir: Optional[str] = None,

        timeout: int = 600,

        model: Optional[str] = None,

        allowed_tools: Optional[list[str]] = None,

        dedup_config: Optional[DeduplicationConfig] = None,

        dedup_manager: DeduplicationManagerLike | None = None,

        dedup_interval: int = 10,

        checkpoint_dir: str | Path | None = None,

        checkpoint_interval: int = 10,

    ) -> ClaudeCode:
        """Construct from pre-built role instances.



        Args:

            reflector: Reflector role for analysing execution traces.

            skill_manager: SkillManager role for update operations.

            skillbook: Starting skillbook.  Creates an empty one if ``None``.

            skillbook_path: Path to load skillbook from.

            working_dir: Directory where Claude Code executes.

            timeout: Execution timeout in seconds.

            model: Optional Claude model override.

            allowed_tools: Optional list of allowed tools.

            dedup_config: Deduplication configuration.

            dedup_manager: Optional pre-built deduplication manager.

            dedup_interval: Samples between deduplication runs.

            checkpoint_dir: Directory for checkpoint files.

            checkpoint_interval: Samples between checkpoint saves.

        """
        # Resolve skillbook (must match build_steps resolution)
        if skillbook_path:
            skillbook = Skillbook.load_from_file(skillbook_path)
        elif skillbook is None:
            skillbook = Skillbook()

        steps = cls.build_steps(
            reflector=reflector,
            skill_manager=skill_manager,
            skillbook=skillbook,
            working_dir=working_dir,
            timeout=timeout,
            model=model,
            allowed_tools=allowed_tools,
            dedup_config=dedup_config,
            dedup_manager=dedup_manager,
            dedup_interval=dedup_interval,
            checkpoint_dir=checkpoint_dir,
            checkpoint_interval=checkpoint_interval,
        )
        return cls(pipeline=Pipeline(steps), skillbook=skillbook)

    @classmethod
    def from_model(

        cls,

        *,

        working_dir: Optional[str] = None,

        ace_model: str = "gpt-4o-mini",

        ace_max_tokens: int = 2048,

        ace_temperature: float = 0.0,

        **kwargs: Any,

    ) -> ClaudeCode:
        """Build ACE roles from a model string.



        Args:

            working_dir: Directory where Claude Code executes.

            ace_model: Model identifier for ACE roles.

            ace_max_tokens: Max tokens for ACE LLM responses.

            ace_temperature: Sampling temperature for ACE roles.

            **kwargs: Forwarded to :meth:`from_roles`.

        """
        from ..implementations import Reflector, SkillManager

        model_settings = ModelSettings(
            temperature=ace_temperature,
            max_tokens=ace_max_tokens,
        )

        return cls.from_roles(
            reflector=Reflector(ace_model, model_settings=model_settings),
            skill_manager=SkillManager(ace_model, model_settings=model_settings),
            working_dir=working_dir,
            **kwargs,
        )

    def run(

        self,

        tasks: Sequence[str] | Iterable[str] | str,

        epochs: int = 1,

        *,

        wait: bool = True,

    ) -> list[SampleResult]:
        """Run coding tasks with learning.



        Args:

            tasks: Single task string or list of task strings.

                Must be a ``Sequence`` for ``epochs > 1``.

            epochs: Number of passes over all tasks.

            wait: If ``True``, block until background learning completes.

        """
        if isinstance(tasks, str):
            tasks = [tasks]
        return self._run(tasks, epochs=epochs, wait=wait)

    def _build_context(  # type: ignore[override]

        self,

        task: str,

        *,

        epoch: int,

        total_epochs: int,

        index: int,

        total: int | None,

        global_sample_index: int,

        **_: Any,

    ) -> ACEStepContext:
        """Place a raw task string on ``ctx.sample``."""
        return ACEStepContext(
            sample=task,
            skillbook=SkillbookView(self.skillbook),
            epoch=epoch,
            total_epochs=total_epochs,
            step_index=index,
            total_steps=total,
            global_sample_index=global_sample_index,
        )

    # ------------------------------------------------------------------
    # Convenience lifecycle methods
    # ------------------------------------------------------------------

    def get_strategies(self) -> str:
        """Return formatted skillbook strategies for display."""
        if not self.skillbook.skills():
            return ""
        return wrap_skillbook_context(self.skillbook)

    # Backward-compat aliases
    save_skillbook = ACERunner.save
    load_skillbook = ACERunner.load
    wait_for_learning = ACERunner.wait_for_background