import re
from pathlib import Path

# Activity log Service
class ActivityService:

    @staticmethod
    def read_logs(file_name="", search="", level="", user="", from_date="", to_date=""):

        file = Path("logs") / file_name

        if not file.exists():
            return []

        logs = []

        with open(file, "r", encoding="utf-8") as f:

            for line in reversed(f.readlines()):
                # Example:
                # 2026-08-01 10:15:55 | INFO | admin | Dashboard | Dashboard Opened
                parts = [x.strip() for x in line.split("|")]

                if len(parts) < 5:
                    continue

                record = {
                    "date": parts[0],
                    "level": parts[1],
                    "user": parts[2],
                    "module": parts[3],
                    "message": "|".join(parts[4:])
                }

                # Search Filter
                if search and search.lower() not in line.lower():
                    continue

                # Level Filter
                if level and record["level"] != level:
                    continue

                # User Filter
                if user and user.lower() not in record["user"].lower():
                    continue

                # Date Filter
                if from_date and record["date"][:10] < from_date:
                    continue

                if to_date and record["date"][:10] > to_date:
                    continue

                logs.append(record)

        return logs