#!/usr/bin/env bash
set -euo pipefail

if [[ $# -lt 1 || $# -gt 3 ]]; then
  echo "Usage: $0 INPUT [BASENAME] [OUTPUT_ROOT]" >&2
  echo "Example: $0 IMG_0944.HEIC ecoteam /var/www/data/external/pictures" >&2
  exit 2
fi

input_path=$1
image_name=${2:-$(basename "${input_path%.*}")}
output_root=${3:-/var/www/data/external/pictures}

if [[ ! -f "$input_path" ]]; then
  echo "Input file not found: $input_path" >&2
  exit 1
fi

if ! command -v magick >/dev/null 2>&1; then
  echo "ImageMagick is required: command 'magick' not found" >&2
  exit 1
fi

mkdir -p "$output_root/phone" "$output_root/tablet" "$output_root/desktop"

resize_image() {
  local width=$1
  local suffix=$2
  local directory=$3
  magick "$input_path" \
    -auto-orient \
    -strip \
    -resize "${width}x>" \
    -quality 82 \
    "$output_root/$directory/${image_name}_${suffix}.webp"
}

resize_image 640  s phone
resize_image 1280 m tablet
resize_image 1920 l desktop

printf 'Created:\n'
printf '  %s\n' \
  "$output_root/phone/${image_name}_s.webp" \
  "$output_root/tablet/${image_name}_m.webp" \
  "$output_root/desktop/${image_name}_l.webp"