gen-name

#!/usr/bin/env bash
# Prints a random name.
#
# Usage:
#   echo $(gen-name)
#   # oceanwood
#   # raincloud
#   # mahoganybay
#   # scarletfog

one_syllable_words=(
  # Colours
  black blue bronze brown gold gray green grey jade pink red sky tan white yellow
  slate jet lace pine ash buff chrome coal rust sand wine

  # Fruits & Vegetables
  bean corn date fig grape lime plum bean pear

  # Nuts & Spices
  clove dill sage salt thyme

  # Flowers & Plants
  fern moss rose vine leaf

  # Birds
  crane dove duck hawk goose owl swan swift

  # Other Foods
  tea

  # Planets
  earth mars

  # Minerals
  chalk flint quartz slate talc bone brass clay ore rock steel stone zinc

  # Weather
  breeze cloud dew fog frost gale hail mist rain sleet snow storm wind

  # Nature
  bay brook cliff cove creek dale dune field glen hill lake peak pond reef shore spring vale wave wood

  # Time/Sky
  dawn dusk moon night star sun

  # Abstract
  bloom drift echo flame flash glow spark tide blaze gleam haze pulse sheen wisp

  # Gemstones
  pearl
)

multi_syllable_words=(
  # Colours
  algae almond amber amethyst aquamarine blackberry cobalt copper coral crimson
  cyan emerald garnet indigo magenta maroon mauve navy obsidian onyx opal orange
  peridot platinum purple ruby sapphire scarlet silver teal topaz turquoise violet
  beige burgundy chartreuse fuchsia khaki mint taupe azure cerulean sepia sienna
  vermilion blush cream ecru ivory auburn charcoal chestnut denim ebony espresso
  hazel latte linen mahogany midnight neon ocean persimmon rosewood bisque powder
  shadow periwinkle

  # Fruits & Vegetables
  apple apricot avocado banana beetroot blackberry blueberry cantaloupe carrot
  cherry chili clementine coconut cranberry currant eggplant grapefruit kabosu
  kumquat lemon limequat mandarin mango melon olive onion orange papaya peach
  pineapple pomelo potato pumpkin raspberry satsuma strawberry sudachi tangerine
  tomato watermelon yuzu

  # Nuts & Spices
  almond basil cardamom cashew cinnamon cocoa garlic ginger nutmeg oregano paprika
  parsley peanut pepper peppermint pistachio rosemary saffron spearmint sugar
  vanilla walnut

  # Flowers & Plants
  azalea bluebell bramble buttercup carnation cilantro clover crocus daffodil
  dahlia daisy dandelion eucalyptus freesia gardenia heather hibiscus honeysuckle
  hyacinth iris ivy jasmine lavender lichen lilac lily magnolia maple marigold
  nettle oleander orchid pansy peony poppy sunflower thistle truffle tulip

  # Birds
  canary eagle egret emu falcon flamingo heron hummingbird kingfisher kiwi martin
  ostrich parrot peacock pelican penguin pigeon robin sparrow stork swallow turkey
  woodpecker

  # Other Foods
  butterscotch caramel chocolate coffee honey honeydew

  # Planets & Celestial
  jupiter mercury neptune pluto saturn uranus venus io luna solar titan
  apollo artemis astro asteroid atlas callisto ceres charon cosmos
  eclipse europa galaxy ganymede helios meteor milky orion pegasus
  pulsar rigel sirius solaris stellar supernova vega zodiac

  # Minerals
  alabaster basalt calcite chalcedony feldspar granite gypsum jasper limestone
  malachite marble mica sandstone crystal fossil iron metal pewter

  # Weather
  aurora drizzle lightning rainbow thunder tempest

  # Nature
  arbor autumn canyon cavern ember forest glacier harbor island meadow mountain
  pebble river summer sunset tundra valley willow winter

  # Abstract
  cascade cinder comet cosmos glimmer horizon lustre mirage nebula nova prism
  radiance ripple shimmer solstice twilight zenith aura beacon cadence corona
  fusion glitter halo nimbus phantom plasma quasar resonance reverie
  sparkle spectrum splendor stardust tremor vigor whisper blessing clarity echo
  essence ether flicker fortune fractal glory harmony impulse kinetic lotus
  lucid luster mantra matrix momentum mosaic muse mystic orbit omen oracle
  paradigm paradox phoenix pixie polaris portal pulse quantum radiant relic
  rhythm sacred satori scroll seraph signal siren spiral starlight symphony
  synapse tempo threshold transcend vertex vortex wanderer wavelength

  # Gemstones
  beryl citrine diamond moonstone spinel zircon agate lapis
)

words=("${one_syllable_words[@]}" "${multi_syllable_words[@]}")

if [[ "$1" == "--count" ]]; then
  one_count="${#one_syllable_words[@]}"
  multi_count="${#multi_syllable_words[@]}"
  total_count="${#words[@]}"

  # Single word permutations
  single_perms=$total_count

  # Two-word permutations (any word + one syllable word)
  two_word_perms=$((total_count * one_count))

  total_perms=$((single_perms + two_word_perms))

  # Birthday paradox calculations for two-word mode
  # Formula: sqrt(2 * n * ln(1/(1-p))) where p is the probability
  collision_01=$(printf "%.0f" "$(echo "scale=2; sqrt(2 * $two_word_perms * 0.01005)" | bc -l)")
  collision_50=$(printf "%.0f" "$(echo "scale=2; sqrt(2 * $two_word_perms * 0.69315)" | bc -l)")
  collision_99=$(printf "%.0f" "$(echo "scale=2; sqrt(2 * $two_word_perms * 4.60517)" | bc -l)")

  echo "Permutations:"
  echo "  Two-word (-2, default): $two_word_perms"
  echo "  Single-word (-1): $single_perms"
  echo ""
  echo "Chances of collision (for -2):"
  echo "  1% at ~$collision_01 names"
  echo "  50% at ~$collision_50 names"
  echo "  99% at ~$collision_99 names"
  echo ""
  echo "Database:"
  echo "  One-syllable words: $one_count"
  echo "  Multi-syllable words: $multi_count"
elif [[ "$1" == "-1" ]]; then
  printf '%s\n' "${words[@]}" | shuf -n 1
else
  word=$(printf '%s\n' "${words[@]}" | shuf -n 1)
  one_syllable=$(printf '%s\n' "${one_syllable_words[@]}" | shuf -n 1)
  printf '%s\n' "${word}${one_syllable}"
fi