"""Objective Generator - Creates new objectives by analyzing codebase.

Placeholder implementation for minimum viable system.
"""

from __future__ import annotations

from dataclasses import dataclass, field
from pathlib import Path
from typing import Any


@dataclass
class CodebaseScan:
    """Results of codebase scan."""

    todos: list[str] = field(default_factory=list)
    test_gaps: list[str] = field(default_factory=list)
    doc_gaps: list[str] = field(default_factory=list)
    incomplete_features: list[str] = field(default_factory=list)
    technical_debt: list[str] = field(default_factory=list)


@dataclass
class Research:
    """Research results."""

    insights: list[str] = field(default_factory=list)
    patterns: list[str] = field(default_factory=list)
    strategy: dict[str, Any] = field(default_factory=dict)
    opportunities: list[dict[str, Any]] = field(default_factory=list)


@dataclass
class Guidance:
    """Grimoire guidance."""

    chapters: list[str] = field(default_factory=list)
    principles: list[str] = field(default_factory=list)
    recommendations: list[str] = field(default_factory=list)
    primary_recommendation: str = ""
    suggested_approach: str = ""
    success_metrics: list[str] = field(default_factory=list)


class ObjectiveGenerator:
    """Generates objectives by analyzing codebase and strategy."""

    def __init__(self, base_dir: Path | None = None):
        if base_dir is None:
            from whitemagic.config import PROJECT_ROOT
            base_dir = PROJECT_ROOT
        self.base_dir = base_dir

    async def scan_codebase(self) -> CodebaseScan:
        """Scan codebase for opportunities using async parallel operations."""
        import asyncio

        # Limit scan to key directories
        key_dirs = [
            str(self.base_dir / "whitemagic" / "autonomous_execution"),
            str(self.base_dir / "whitemagic" / "core"),
            str(self.base_dir / "tests"),
        ]

        # Run all scans in parallel
        results = await asyncio.gather(
            self._scan_todos(key_dirs),
            self._scan_test_gaps(),
            self._scan_doc_gaps(),
            self._scan_incomplete_features(key_dirs),
            self._scan_technical_debt(key_dirs),
            return_exceptions=True,
        )

        # Unpack results (handling any exceptions)
        todos = list(results[0]) if not isinstance(results[0], BaseException) else []
        test_gaps = list(results[1]) if not isinstance(results[1], BaseException) else []
        doc_gaps = list(results[2]) if not isinstance(results[2], BaseException) else []
        incomplete_features = list(results[3]) if not isinstance(results[3], BaseException) else []
        technical_debt = list(results[4]) if not isinstance(results[4], BaseException) else []

        return CodebaseScan(
            todos=todos,
            test_gaps=test_gaps,
            doc_gaps=doc_gaps,
            incomplete_features=incomplete_features,
            technical_debt=technical_debt,
        )

    async def _scan_todos(self, key_dirs: list[str]) -> list[str]:
        """Scan for TODO comments asynchronously."""
        import asyncio

        async def scan_dir(dir_path: str) -> list[str]:
            try:
                proc = await asyncio.create_subprocess_exec(
                    "grep", "-r", "-n", "TODO", dir_path,
                    stdout=asyncio.subprocess.PIPE,
                    stderr=asyncio.subprocess.PIPE,
                )
                stdout, _ = await asyncio.wait_for(proc.communicate(), timeout=30)
                if stdout:
                    return [line.strip() for line in stdout.decode().splitlines()[:50] if line.strip()]
            except (asyncio.TimeoutError, Exception):
                return []
            return []

        # Scan all directories in parallel
        dir_results = await asyncio.gather(*[scan_dir(d) for d in key_dirs])
        return [item for sublist in dir_results for item in sublist]  # Flatten

    async def _scan_test_gaps(self) -> list[str]:
        """Scan for files without tests asynchronously."""
        import asyncio
        from pathlib import Path

        try:
            # Find source files and test files in parallel
            src_task = asyncio.create_subprocess_exec(
                "find", str(self.base_dir / "whitemagic"), "-name", "*.py", "-not", "-path", "*/tests/*",
                stdout=asyncio.subprocess.PIPE,
            )
            test_task = asyncio.create_subprocess_exec(
                "find", str(self.base_dir / "tests"), "-name", "test_*.py",
                stdout=asyncio.subprocess.PIPE,
            )

            src_proc, test_proc = await asyncio.gather(
                src_task, test_task, return_exceptions=True,
            )

            if isinstance(src_proc, BaseException) or isinstance(test_proc, BaseException):
                return []

            src_stdout, _ = await asyncio.wait_for(src_proc.communicate(), timeout=30)
            test_stdout, _ = await asyncio.wait_for(test_proc.communicate(), timeout=30)

            src_files = src_stdout.decode().splitlines()
            test_files = test_stdout.decode().splitlines()

            test_names = set(Path(f).name.replace("test_", "") for f in test_files)
            gaps = []
            for src_file in src_files[:100]:  # Limit to 100
                src_name = Path(src_file).name
                if src_name != "__init__.py" and src_name not in test_names:
                    gaps.append(src_file)
            return gaps
        except (asyncio.TimeoutError, Exception):
            return []

    async def _scan_doc_gaps(self) -> list[str]:
        """Scan for documentation gaps asynchronously."""
        import asyncio

        try:
            proc = await asyncio.create_subprocess_exec(
                "find", str(self.base_dir / "whitemagic"), "-name", "*.py", "-not", "-path", "*/tests/*",
                stdout=asyncio.subprocess.PIPE,
            )
            stdout, _ = await asyncio.wait_for(proc.communicate(), timeout=30)
            src_files = stdout.decode().splitlines()

            gaps = []
            for src_file in src_files[:100]:  # Limit to 100
                try:
                    with open(src_file, encoding="utf-8") as f:
                        content = f.read()
                        if "def " in content and '"""' not in content[:200]:
                            gaps.append(src_file)
                except Exception:
                    continue
            return gaps
        except (asyncio.TimeoutError, Exception):
            return []

    async def _scan_incomplete_features(self, key_dirs: list[str]) -> list[str]:
        """Scan for incomplete features asynchronously."""
        import asyncio

        async def scan_dir(dir_path: str) -> list[str]:
            try:
                proc = await asyncio.create_subprocess_exec(
                    "grep", "-r", "-n", "TODO implement", dir_path,
                    stdout=asyncio.subprocess.PIPE,
                    stderr=asyncio.subprocess.PIPE,
                )
                stdout, _ = await asyncio.wait_for(proc.communicate(), timeout=30)
                if stdout:
                    return [line.strip() for line in stdout.decode().splitlines()[:50] if line.strip()]
            except (asyncio.TimeoutError, Exception):
                return []
            return []

        dir_results = await asyncio.gather(*[scan_dir(d) for d in key_dirs])
        return [item for sublist in dir_results for item in sublist]

    async def _scan_technical_debt(self, key_dirs: list[str]) -> list[str]:
        """Scan for technical debt asynchronously."""
        import asyncio

        async def scan_dir(dir_path: str) -> list[str]:
            try:
                proc = await asyncio.create_subprocess_exec(
                    "grep", "-r", "-n", "-E", "FIXME|HACK", dir_path,
                    stdout=asyncio.subprocess.PIPE,
                    stderr=asyncio.subprocess.PIPE,
                )
                stdout, _ = await asyncio.wait_for(proc.communicate(), timeout=30)
                if stdout:
                    return [line.strip() for line in stdout.decode().splitlines()[:50] if line.strip()]
            except (asyncio.TimeoutError, Exception):
                return []
            return []

        dir_results = await asyncio.gather(*[scan_dir(d) for d in key_dirs])
        return [item for sublist in dir_results for item in sublist]

    async def research_possibilities(self, scan: CodebaseScan) -> Research:
        """Research possibilities based on scan."""
        insights = []
        patterns = []
        opportunities = []
        strategy = {}

        # Analyze TODOs for insights
        if scan.todos:
            insights.append(f"Found {len(scan.todos)} TODO items to address")
            for todo in scan.todos[:5]:  # Limit to 5 for brevity
                opportunities.append({
                    "type": "todo",
                    "description": f"Address TODO: {todo.split(':', 2)[-1]}",
                    "file": todo.split(":", 1)[0] if ":" in todo else "unknown",
                })

        # Analyze test gaps
        if scan.test_gaps:
            insights.append(f"Found {len(scan.test_gaps)} files without corresponding tests")
            for gap in scan.test_gaps[:5]:
                opportunities.append({
                    "type": "test_gap",
                    "description": f"Create test for {Path(gap).name}",
                    "file": gap,
                })

        # Analyze documentation gaps
        if scan.doc_gaps:
            insights.append(f"Found {len(scan.doc_gaps)} files potentially missing documentation")
            for gap in scan.doc_gaps[:5]:
                opportunities.append({
                    "type": "doc_gap",
                    "description": f"Add documentation for {Path(gap).name}",
                    "file": gap,
                })

        # Analyze incomplete features
        if scan.incomplete_features:
            insights.append(f"Found {len(scan.incomplete_features)} incomplete features")
            for feature in scan.incomplete_features[:5]:
                opportunities.append({
                    "type": "incomplete_feature",
                    "description": f"Complete feature: {feature.split(':', 2)[-1]}",
                    "file": feature.split(":", 1)[0] if ":" in feature else "unknown",
                })

        # Analyze technical debt
        if scan.technical_debt:
            insights.append(f"Found {len(scan.technical_debt)} instances of technical debt")
            for debt in scan.technical_debt[:5]:
                opportunities.append({
                    "type": "technical_debt",
                    "description": f"Resolve tech debt: {debt.split(':', 2)[-1]}",
                    "file": debt.split(":", 1)[0] if ":" in debt else "unknown",
                })

        # Simple strategy based on counts
        if len(opportunities) > 0:
            # Prioritize based on type with most items
            types = [o["type"] for o in opportunities]
            most_common_type = max(set(types), key=types.count, default="todo")
            strategy = {
                "focus": most_common_type,
                "priority": "high" if len(opportunities) > 10 else "medium",
            }

        # Add pattern if there are significant issues
        if len(opportunities) > 20:
            patterns.append("Significant technical debt accumulation")

        # Store the research for later use in generate_objectives
        self.last_research = Research(insights=insights, patterns=patterns, strategy=strategy, opportunities=opportunities)
        return self.last_research

    async def consult_grimoire(self, research: Research) -> Guidance:
        """Consult grimoire for guidance based on research findings."""
        chapters = []
        principles = []
        recommendations = []
        primary_recommendation = ""
        suggested_approach = ""
        success_metrics = []

        # Simple logic based on research focus
        if research.strategy.get("focus") == "todo":
            chapters.append("Implementation Priorities")
            principles.append("Address known issues first")
            recommendations.append("Focus on resolving TODO items")
            primary_recommendation = "Prioritize TODO resolution"
            suggested_approach = "Start with simplest TODOs to build momentum"
            success_metrics.append("Reduce TODO count by 50%")
        elif research.strategy.get("focus") == "test_gap":
            chapters.append("Quality Assurance")
            principles.append("Test coverage ensures stability")
            recommendations.append("Create missing tests")
            primary_recommendation = "Increase test coverage"
            suggested_approach = "Create unit tests for critical modules first"
            success_metrics.append("Achieve 80% test coverage")
        elif research.strategy.get("focus") == "doc_gap":
            chapters.append("Documentation Standards")
            principles.append("Clear documentation prevents knowledge loss")
            recommendations.append("Document key modules")
            primary_recommendation = "Improve documentation"
            suggested_approach = "Document public APIs and core modules first"
            success_metrics.append("Document 90% of public APIs")
        elif research.strategy.get("focus") == "incomplete_feature":
            chapters.append("Feature Completion")
            principles.append("Complete features before starting new ones")
            recommendations.append("Finish incomplete features")
            primary_recommendation = "Complete existing features"
            suggested_approach = "Focus on smallest incomplete features for quick wins"
            success_metrics.append("Complete 3 incomplete features")
        elif research.strategy.get("focus") == "technical_debt":
            chapters.append("Technical Excellence")
            principles.append("Resolve technical debt to prevent future issues")
            recommendations.append("Address technical debt")
            primary_recommendation = "Reduce technical debt"
            suggested_approach = "Start with debt in critical paths"
            success_metrics.append("Resolve 5 instances of technical debt")
        else:
            chapters.append("General Development")
            principles.append("Balance between new features and maintenance")
            recommendations.append("Continue general development")
            primary_recommendation = "Continue implementation"
            suggested_approach = "Balance new features with maintenance tasks"
            success_metrics.append("Complete 5 objectives")

        return Guidance(
            chapters=chapters,
            principles=principles,
            recommendations=recommendations,
            primary_recommendation=primary_recommendation,
            suggested_approach=suggested_approach,
            success_metrics=success_metrics,
        )

    async def form_strategy(self, guidance: Guidance) -> dict[str, Any]:
        """Form strategy based on guidance."""
        return {
            "goal": guidance.primary_recommendation,
            "approach": guidance.suggested_approach,
            "metrics": guidance.success_metrics,
        }

    async def generate_objectives(self, strategy: dict[str, Any]) -> list:
        """Generate objectives from strategy."""
        from .continuous_executor import Objective

        objectives = []
        goal = strategy.get("goal", "Complete autonomous execution system")

        if "TODO" in goal:
            objectives.extend([
                Objective(description="Resolve 5 TODO items in codebase", success_criteria=["5 TODOs resolved"]),
                Objective(description="Review remaining TODOs for priority", success_criteria=["TODO list prioritized"]),
            ])
        elif "test coverage" in goal.lower():
            objectives.extend([
                Objective(description="Create tests for 3 critical modules", success_criteria=["3 test files created"]),
                Objective(description="Run test coverage report", success_criteria=["Coverage report generated"]),
            ])
        elif "documentation" in goal.lower():
            objectives.extend([
                Objective(description="Document core API modules", success_criteria=["Core APIs documented"]),
                Objective(description="Update README with new features", success_criteria=["README updated"]),
            ])
        elif "feature" in goal.lower():
            objectives.extend([
                Objective(description="Complete 1 incomplete feature", success_criteria=["Feature completed"]),
                Objective(description="Test completed feature", success_criteria=["Feature tests passing"]),
            ])
        elif "technical debt" in goal.lower():
            objectives.extend([
                Objective(description="Resolve 3 instances of technical debt", success_criteria=["3 debt items resolved"]),
                Objective(description="Document remaining technical debt", success_criteria=["Debt list updated"]),
            ])
        else:
            objectives.append(Objective(description="Implement objective generator", success_criteria=["Objective generator complete"]))

        # Enhance objectives with specific targets from research if available
        if hasattr(self, "last_research") and self.last_research:
            research = self.last_research
            if research.opportunities:
                if "TODO" in goal:
                    for opp in research.opportunities[:5]:
                        if opp["type"] == "todo":
                            objectives.append(Objective(description=f"Resolve TODO in {opp['file']}: {opp['description']}", success_criteria=[f"file_exists:{opp['file']}"], priority=7))
                elif "test coverage" in goal.lower():
                    for opp in research.opportunities[:3]:
                        if opp["type"] == "test_gap":
                            objectives.append(Objective(description=f"Create test for {opp['file']}", success_criteria=["tests_pass"], priority=8))
                elif "documentation" in goal.lower():
                    for opp in research.opportunities[:2]:
                        if opp["type"] == "doc_gap":
                            objectives.append(Objective(description=f"Add documentation to {opp['file']}", success_criteria=[f"file_exists:{opp['file']}"], priority=6))
                elif "feature" in goal.lower():
                    for opp in research.opportunities[:2]:
                        if opp["type"] == "incomplete_feature":
                            objectives.append(Objective(description=f"Complete feature in {opp['file']}: {opp['description']}", success_criteria=["Feature completed"], priority=7))
                elif "technical debt" in goal.lower():
                    for opp in research.opportunities[:3]:
                        if opp["type"] == "technical_debt":
                            objectives.append(Objective(description=f"Resolve technical debt in {opp['file']}: {opp['description']}", success_criteria=["Debt resolved"], priority=6))

        return objectives
