/// Small pure helpers for layout, formatting, and user-facing strings.
library;

import 'package:flutter/material.dart';

import 'constants.dart';

/// Horizontal padding that grows a little on wider screens.
double pagePadding(double width) {
  if (width >= Breakpoints.medium) return 32;
  if (width >= Breakpoints.compact) return 24;
  return 16;
}

/// Formats [date] as `MMM d, y` without pulling in `intl`.
String formatDate(DateTime date) {
  const months = [
    'Jan',
    'Feb',
    'Mar',
    'Apr',
    'May',
    'Jun',
    'Jul',
    'Aug',
    'Sep',
    'Oct',
    'Nov',
    'Dec',
  ];
  return '${months[date.month - 1]} ${date.day}, ${date.year}';
}

/// Converts a stored theme key into a [ThemeMode].
ThemeMode themeModeFromName(String name) {
  return switch (name) {
    'light' => ThemeMode.light,
    'dark' => ThemeMode.dark,
    _ => ThemeMode.system,
  };
}

/// Inverse of [themeModeFromName] for persistence.
String nameFromThemeMode(ThemeMode mode) {
  return switch (mode) {
    ThemeMode.light => 'light',
    ThemeMode.dark => 'dark',
    ThemeMode.system => 'system',
  };
}

/// Title-cases a [ThemeMode] for settings labels.
String labelForThemeMode(ThemeMode mode) {
  return switch (mode) {
    ThemeMode.light => 'Light',
    ThemeMode.dark => 'Dark',
    ThemeMode.system => 'System',
  };
}