"""
Plan Manager for CodeAct Agent.
Handles plan creation, updates, and progress tracking.
"""

import re
from typing import Optional, Dict


class PlanManager:
    """Manages plan creation, updates, and progress tracking."""

    @staticmethod
    def extract_plan_from_content(content: str) -> Optional[str]:
        """Extract plan from agent content."""
        plan_pattern = r'\d+\.\s*\[[^\]]*\]\s*[^\n]+(?:\n\d+\.\s*\[[^\]]*\]\s*[^\n]+)*'
        matches = re.findall(plan_pattern, content)
        # Return the last (most recent) plan if multiple plans exist
        return matches[-1] if matches else None

    @staticmethod
    def update_plan_for_solution(plan_text: str) -> str:
        """Update plan to mark all remaining steps as completed when providing final solution."""
        if not plan_text:
            return plan_text

        lines = plan_text.split('\n')
        updated_lines = []

        for line in lines:
            # Mark any unchecked or failed steps as completed since we're providing final solution
            if '[ ]' in line or '[✗]' in line:
                updated_line = re.sub(r'\[\s*[^\]]*\]', '[✓]', line)
                updated_lines.append(updated_line)
            else:
                updated_lines.append(line)

        return '\n'.join(updated_lines)

    @staticmethod
    def mark_step_completed(plan_text: str, step_description: str) -> str:
        """Mark a specific step as completed based on its description."""
        if not plan_text or not step_description:
            return plan_text

        lines = plan_text.split('\n')
        updated_lines = []

        for line in lines:
            # Check if this line contains the step description and is unchecked
            if step_description.lower() in line.lower() and ('[ ]' in line or '[✗]' in line):
                updated_line = re.sub(r'\[\s*[^\]]*\]', '[✓]', line)
                updated_lines.append(updated_line)
            else:
                updated_lines.append(line)

        return '\n'.join(updated_lines)

    @staticmethod
    def get_plan_progress(plan_text: str) -> Dict[str, int]:
        """Get plan progress statistics."""
        if not plan_text:
            return {"total": 0, "completed": 0, "pending": 0, "failed": 0}

        lines = plan_text.split('\n')
        stats = {"total": 0, "completed": 0, "pending": 0, "failed": 0}

        for line in lines:
            if re.search(r'\d+\.\s*\[', line):
                stats["total"] += 1
                if '[✓]' in line:
                    stats["completed"] += 1
                elif '[ ]' in line:
                    stats["pending"] += 1
                elif '[✗]' in line:
                    stats["failed"] += 1

        return stats