# %%
import datetime

class SensorAgent:
    DEFAULT_SEQUENCE = [
        {"site": "right_leg", "side": "right"},
        {"site": "right_arm", "side": "right"},
        {"site": "left_arm", "side": "left"},
        {"site": "left_leg", "side": "left"}
    ]

    def __init__(self, sequence=None, change_days=10):
        """
        sequence: Optional list of dicts like [{"site": "leg", "side": "left"}, ...]
        change_days: Number of days between sensor changes
        """
        self.sequence = sequence or self.DEFAULT_SEQUENCE
        self.change_days = change_days

    def generate_schedule(self, start_date, starting_site):
        """
        start_date: datetime.date object
        starting_site: dict with keys "site" and "side"
        """
        if not isinstance(starting_site, dict):
            raise ValueError("starting_site must be a dict with 'site' and 'Side'")

        site = starting_site.get("site")
        side = starting_site.get("side")

        # Find index of starting site in sequence
        start_index = next(
            (i for i, s in enumerate(self.sequence)
            if s["site"] == starting_site["site"] and s["side"] == starting_site["side"]),
            None
        )
        
        if start_index is None:
            raise ValueError(f"Starting site {starting_site} not found in sequence.")

        # Rotate sequence from starting point
        rotated_sequence = self.sequence[start_index:] + self.sequence[:start_index]

        # Generate schedule
        schedule = []
        for i, entry in enumerate(rotated_sequence):
            scheduled_date = start_date + datetime.timedelta(days=i * self.change_days)
            schedule.append({
                "date": scheduled_date,
                "site": entry["site"],
                "side": entry["side"]
            })

        return schedule