#!/usr/bin/env bash
# Generate responsive WebP/JPEG variants for hero LCP and community gallery.
# Requires: ImageMagick (convert). Run from repo root: ./scripts/optimize-community-photos.sh

set -euo pipefail
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
MIM_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
SRC_DIR="$MIM_ROOT/public/photos/community"
OUT_DIR="$SRC_DIR/optimized"

if ! command -v convert >/dev/null 2>&1; then
  echo "Error: ImageMagick convert is required." >&2
  exit 1
fi

mkdir -p "$OUT_DIR"

# Hero LCP: outreach-01 — crop to 16:10 (display aspect), then resize widths
HERO_SRC="$SRC_DIR/outreach-01.jpg"
if [[ ! -f "$HERO_SRC" ]]; then
  echo "Missing $HERO_SRC" >&2
  exit 1
fi

HERO_CROP="$OUT_DIR/outreach-01-crop.jpg"
convert "$HERO_SRC" -auto-orient -gravity center -crop 1200x750+0+0 +repage \
  -strip -interlace Plane -quality 82 "$HERO_CROP"

for w in 480 720 960 1200; do
  h=$((w * 10 / 16))
  base="$OUT_DIR/outreach-01-${w}"
  convert "$HERO_CROP" -resize "${w}x${h}^" -gravity center -extent "${w}x${h}" \
    -strip -interlace Plane -quality 82 "${base}.jpg"
  convert "$HERO_CROP" -resize "${w}x${h}^" -gravity center -extent "${w}x${h}" \
    -strip -quality 82 "${base}.webp"
done

# Gallery tiles (2–5): 600w max for grid
for n in 02 03 04 05; do
  src="$SRC_DIR/outreach-${n}.jpg"
  [[ -f "$src" ]] || continue
  for w in 400 600; do
    base="$OUT_DIR/outreach-${n}-${w}"
    convert "$src" -auto-orient -resize "${w}x" -strip -interlace Plane -quality 82 "${base}.jpg"
    convert "$src" -auto-orient -resize "${w}x" -strip -quality 82 "${base}.webp"
  done
done

echo "Optimized assets in $OUT_DIR"
ls -lah "$OUT_DIR"