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

import re


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

    @staticmethod
    def extract_plan_from_content(content: str) -> str | None:
        """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 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