"""
Shared utility functions — time formatting, address formatting, etc.
"""
from datetime import datetime, timedelta
from core import settings_manager as settings


def format_time(time_str: str) -> str:
    """Convert 'HH:MM' (24h) to '2:30 PM' (12h) format for display."""
    t = datetime.strptime(time_str, "%H:%M")
    return t.strftime("%I:%M %p") #previously %-I


def format_date(date_str: str) -> str:
    """Convert 'YYYY-MM-DD' to 'Friday, March 20, 2026' for display."""
    d = datetime.strptime(date_str, "%Y-%m-%d")
    return d.strftime("%A, %B %d, %Y") #previously %-d


def is_future_date(date_str: str, min_hours_ahead: int = 24) -> bool:
    """Check if a date string is at least min_hours_ahead in the future."""
    target = datetime.strptime(date_str, "%Y-%m-%d")
    cutoff = datetime.now() + timedelta(hours=min_hours_ahead)
    return target >= cutoff


def build_event_title(visit_level: int | str, patient_name: str, provider_name: str) -> str:
    """Build a Google Calendar event title.

    Format: '[Level X] PatientName — ProviderName'
    """
    level_info = settings.get_visit_levels().get(visit_level, {})
    label = level_info.get("label", f"Level {visit_level}")
    return f"[{label}] {patient_name} — {provider_name}"


def build_event_description(patient: dict, provider: dict, visit_address: str) -> str:
    """Build a Google Calendar event description with contact info and address."""
    lines = [
        f"Patient: {patient.get('name', 'N/A')}",
        f"Patient Email: {patient.get('email', 'N/A')}",
        f"Provider: {provider.get('name', 'N/A')}",
        f"Provider Email: {provider.get('email', 'N/A')}",
        f"Visit Address: {visit_address}",
    ]
    if patient.get("notes"):
        lines.append(f"Notes: {patient['notes']}")
    return "\n".join(lines)


def minutes_to_display(minutes: int) -> str:
    """Convert minutes to a readable string: '1h 15m' or '45m'."""
    if minutes < 60:
        return f"{minutes}m"
    hours = minutes // 60
    remaining = minutes % 60
    if remaining == 0:
        return f"{hours}h"
    return f"{hours}h {remaining}m"