"""Agent SDK Code Review Workflow.

Delegates a full code review to the Claude Agent SDK, using four
specialized subagents (security, quality, performance, architecture)
and synthesizing their findings into a unified WorkflowResult.

Copyright 2026 Smart-AI-Memory
Licensed under Apache 2.0
"""

from __future__ import annotations

import logging
from datetime import datetime
from pathlib import Path
from typing import Any

from .agent_sdk_adapter import AgentSDKResultAdapter
from .base import BaseWorkflow, ModelTier
from .data_classes import CostReport, WorkflowResult, WorkflowStage

logger = logging.getLogger(__name__)

# Module-level availability guard for claude_agent_sdk
_SDK_AVAILABLE = False
try:
    import claude_agent_sdk  # type: ignore[import-untyped]

    _SDK_AVAILABLE = True
except ImportError:
    claude_agent_sdk = None  # type: ignore[assignment]

_DEPTH_MAX_TURNS: dict[str, int] = {
    "quick": 10,
    "standard": 20,
    "deep": 40,
}

_SUBAGENT_NAMES = [
    "security-reviewer",
    "quality-reviewer",
    "perf-reviewer",
    "architect-reviewer",
]

_MAIN_PROMPT_TEMPLATE = """\
You are a senior code review orchestrator. Review the codebase at {path} \
using the four specialized subagents below. Each subagent should focus on \
its domain and report findings as structured markdown.

After all subagents finish, synthesize their findings into a single \
report with these sections:

## Summary
Overall code health score (0-100) and a 2-3 sentence executive summary.

## Security
Findings from the security reviewer.

## Quality
Findings from the quality reviewer.

## Performance
Findings from the performance reviewer.

## Architecture
Findings from the architecture reviewer.

## Suggestions
Actionable next steps ordered by priority.

Be thorough but concise. Cite file paths and line numbers when possible.\
"""


class AgentCodeReviewWorkflow(BaseWorkflow):
    """Code review workflow powered by the Claude Agent SDK.

    Delegates all analysis to four Agent SDK subagents rather
    than using the mixin stage system. Each subagent focuses on
    a specific review domain (security, quality, performance,
    architecture). The orchestrator synthesizes findings into a
    unified report.

    Usage::

        workflow = AgentCodeReviewWorkflow()
        result = await workflow.execute(path="src/", depth="standard")
    """

    name = "code-review-sdk"
    description = "Agent SDK-powered code review with 4 specialized subagents"
    stages = ["agent-review"]
    tier_map = {"agent-review": ModelTier.CAPABLE}

    async def execute(self, **kwargs: Any) -> WorkflowResult:
        """Execute the Agent SDK code review.

        Args:
            **kwargs: Keyword arguments.
                path (str): Required. Directory or file to review.
                depth (str): Review depth — "quick", "standard",
                    or "deep". Defaults to "standard".

        Returns:
            WorkflowResult with findings, suggestions, and metadata.
        """
        path_arg: str = kwargs.get("path", "")
        depth: str = kwargs.get("depth", "standard")

        if not path_arg:
            return self._error_result("path argument is required")

        if not _SDK_AVAILABLE:
            return self._error_result(
                "claude-agent-sdk not installed. " "Install with: pip install claude-agent-sdk"
            )

        resolved_path = str(Path(path_arg).resolve())
        max_turns = _DEPTH_MAX_TURNS.get(depth, 20)

        started_at = datetime.now()

        try:
            result_text = await self._run_agent_review(resolved_path, max_turns)

            completed_at = datetime.now()

            return AgentSDKResultAdapter.from_agent_output(
                result_text=result_text,
                subagent_names=_SUBAGENT_NAMES,
                started_at=started_at,
                completed_at=completed_at,
                metadata={
                    "path": resolved_path,
                    "depth": depth,
                    "max_turns": max_turns,
                },
            )

        except ImportError as exc:
            logger.error("Agent SDK import failed: %s", exc)
            return self._error_result(f"Agent SDK unavailable: {exc}")
        except (ConnectionError, TimeoutError) as exc:
            logger.error("Agent SDK network error: %s", exc)
            return self._error_result(f"Agent SDK connection failed: {exc}")
        except Exception as exc:  # noqa: BLE001
            # INTENTIONAL: Catch-all for unknown SDK errors to return
            # a structured WorkflowResult rather than crashing.
            logger.exception("Agent SDK code review failed: %s", type(exc).__name__)
            return self._error_result(f"Agent SDK error: {type(exc).__name__}: {exc}")

    async def _run_agent_review(self, resolved_path: str, max_turns: int) -> str:
        """Run the Agent SDK review and return result text.

        Args:
            resolved_path: Absolute path to review.
            max_turns: Maximum agent turns.

        Returns:
            The agent's final result text.
        """
        result_parts: list[str] = []
        async for message in claude_agent_sdk.query(
            prompt=_MAIN_PROMPT_TEMPLATE.format(path=resolved_path),
            options=claude_agent_sdk.ClaudeAgentOptions(
                cwd=resolved_path,
                allowed_tools=["Read", "Glob", "Grep", "Agent"],
                permission_mode="default",
                max_turns=max_turns,
                agents={
                    "security-reviewer": claude_agent_sdk.AgentDefinition(
                        description="Security reviewer that finds vulnerabilities.",
                        prompt=(
                            "You are a security reviewer. Focus on: "
                            "eval/exec usage, injection vulnerabilities, "
                            "path traversal, hardcoded secrets, and "
                            "authentication issues. Report each finding "
                            "with file path, line number, severity, and "
                            "remediation advice."
                        ),
                        tools=["Read", "Glob", "Grep"],
                    ),
                    "quality-reviewer": claude_agent_sdk.AgentDefinition(
                        description="Code quality reviewer for standards and patterns.",
                        prompt=(
                            "You are a code quality reviewer. Focus on: "
                            "code complexity, error handling patterns, "
                            "naming conventions, duplication, and test "
                            "coverage gaps. Report each finding with "
                            "file path, severity, and improvement advice."
                        ),
                        tools=["Read", "Glob", "Grep"],
                    ),
                    "perf-reviewer": claude_agent_sdk.AgentDefinition(
                        description="Performance reviewer for bottlenecks and inefficiencies.",
                        prompt=(
                            "You are a performance reviewer. Focus on: "
                            "N+1 patterns, unnecessary list copies, "
                            "blocking I/O in async code, and missing "
                            "caching opportunities. Report each finding "
                            "with file path, estimated impact, and fix."
                        ),
                        tools=["Read", "Glob", "Grep"],
                    ),
                    "architect-reviewer": claude_agent_sdk.AgentDefinition(
                        description="Architecture reviewer for design and coupling issues.",
                        prompt=(
                            "You are an architecture reviewer. Focus on: "
                            "coupling between modules, SOLID violations, "
                            "circular dependencies, API design issues, "
                            "and abstraction level mismatches. Report "
                            "each finding with affected modules and "
                            "refactoring suggestions."
                        ),
                        tools=["Read", "Glob", "Grep"],
                    ),
                },
            ),
        ):
            if isinstance(message, claude_agent_sdk.ResultMessage):
                result_parts.append(message.result)

        return "\n".join(result_parts) if result_parts else "No results returned."

    def _error_result(self, message: str) -> WorkflowResult:
        """Build a failed WorkflowResult with the given error message.

        Args:
            message: Human-readable error description.

        Returns:
            WorkflowResult with success=False.
        """
        now = datetime.now()
        return WorkflowResult(
            success=False,
            stages=[
                WorkflowStage(
                    name="agent-review",
                    tier=ModelTier.CAPABLE,
                    description="Agent SDK code review",
                ),
            ],
            final_output=None,
            cost_report=CostReport(
                total_cost=0.0,
                baseline_cost=0.0,
                savings=0.0,
                savings_percent=0.0,
            ),
            started_at=now,
            completed_at=now,
            total_duration_ms=0,
            provider="anthropic",
            error=message,
        )
