"""
memory_api.py — Session + place memory interface
"""
import sys
import os
from Core.env_loader import PROJECT_ROOT
from API.odometry_api import get_position

MEMORY_AVAILABLE = False
mem = None


def init_memory() -> bool:
    """Start memory subsystem. Returns True if successful."""
    global MEMORY_AVAILABLE, mem

    # marcus_memory.py lives in Brain/
    brain_dir = os.path.join(PROJECT_ROOT, "Brain")
    for d in (brain_dir,):
        if d not in sys.path:
            sys.path.insert(0, d)

    try:
        from marcus_memory import Memory
        mem = Memory()
        mem.start_session()
        MEMORY_AVAILABLE = True
        print("Memory started")
        return True
    except ImportError as e:
        print(f"marcus_memory.py not found ({e}) — memory disabled")
        return False
    except Exception as e:
        print(f"Memory error: {e} — memory disabled")
        return False


def log_cmd(cmd: str, response: str = "", duration: float = 0.0):
    """Log command to session memory."""
    if mem:
        try:
            mem.log_command(cmd, response, duration)
        except Exception:
            pass


def log_detection(class_name: str, position: str = "", distance: str = ""):
    """Log YOLO detection to session memory with current position."""
    if mem and class_name:
        pos = get_position()
        try:
            mem.log_detection(
                class_name, position, distance,
                x=pos["x"] if pos else None,
                y=pos["y"] if pos else None,
            )
        except Exception:
            pass


def place_save(name: str) -> bool:
    """Save current position as named place."""
    if not mem:
        print("  [Places] Memory not available — cannot save place")
        return False
    pos = get_position()
    return mem.save_place(
        name,
        x=pos["x"] if pos else None,
        y=pos["y"] if pos else None,
        heading=pos["heading"] if pos else None,
    )


def place_goto(name: str) -> bool:
    """Navigate to a named saved place."""
    from API.odometry_api import odom, ODOM_AVAILABLE

    if not mem:
        print("  [Places] Memory not available")
        return False
    place = mem.get_place(name)
    if place is None:
        return False
    if not place.get("has_odom"):
        print(f"  [Places] '{name}' was saved without odometry — no coordinates")
        return False
    if not odom or not ODOM_AVAILABLE:
        print("  [Places] Odometry not running — cannot navigate")
        return False
    print(f"  [Places] Navigating to '{name}' "
          f"(x={place['x']:.2f}, y={place['y']:.2f}, h={place['heading']:.1f})")
    return odom.navigate_to(place["x"], place["y"], place["heading"])


def places_list_str() -> str:
    """Return formatted string of all saved places."""
    if not mem:
        return "Memory not available"
    places = mem.list_places()
    if not places:
        return "No places saved yet. Say 'remember this as <name>' to save one."
    lines = [f"  {'Name':<20} {'Coordinates':<25} {'Saved at'}"]
    lines.append("  " + "-" * 60)
    for p in places:
        coord = (f"x={p['x']:.2f} y={p['y']:.2f} h={p['heading']:.1f}"
                 if p.get("has_odom") else "no coordinates")
        lines.append(f"  {p['name']:<20} {coord:<25} {p.get('saved_at', '')}")
    return "\n".join(lines)