#!/bin/bash
if [[ "$DEBUG" == "true " ]]; then
  set -x
fi
set -e
source scripts/config.sh || exit 1

SITE_FOLDER="dist"

function dependency_check {
  if ! command -v $@ &> /dev/null; then
    echo "dependency error: $@ could not be found"
    exit 1
  fi
}

# Check dependencies
dependency_check convert
dependency_check exiftool
dependency_check optipng
dependency_check jpegoptim

echo "building site using astro..."
npm run build

cp -r ./scripts/ dist/scripts/

# Git repo setup
mkdir -p "$SITE_FOLDER/repos"
cp -r "$SITE_FOLDER/dotfiles/.git" "$SITE_FOLDER/repos/dotfiles.git"
pushd "$SITE_FOLDER/repos/dotfiles.git"
  git update-server-info
popd

# Render ico file
echo "making /img/profile_image.{jpg,png}..."
convert "$SITE_FOLDER/img/me.jpg" -resize 64x64 "$SITE_FOLDER/img/profile_image.jpg"
convert "$SITE_FOLDER/img/me.jpg" -resize 64x64 "$SITE_FOLDER/img/profile_image.png"

# convert png to ico file
# https://stackoverflow.com/a/49823738
echo "making favicon.ico..."
convert -background transparent "$SITE_FOLDER/img/profile_image.png" -define icon:auto-resize=16,24,32,48,64,72,96,128,256 "$SITE_FOLDER/favicon.ico"

# Clear configuration info
echo "clearing configuration info from built products..."
sed -ie "s/$S3_BUCKET/s3-bucket-name/g" "$SITE_FOLDER/scripts/config.sh"
sed -ie "s/$DISTRIBUTION_ID/cloudfront-distribution-id/g" "$SITE_FOLDER/scripts/config.sh"

# Alias files to folder/index.html
find "$SITE_FOLDER" -type f ! -iname 'index.html' -iname '*.html' -print0 | while read -d $'\0' f; do
  echo "aliasing $f to ${f%.html}/index.html"
  mkdir -p "${f%.html}"
  cp "$f" "${f%.html}/index.html"
done

mkdir -p .cache

# Find all images
find "$SITE_FOLDER" -type f \( \
     -iname "*.jpg" \
  -o -iname "*.jpeg" \
  -o -iname "*.png" \
  -o -iname "*.gif" \
  -o -iname "*.tiff" \
\) -print0 | while read -d $'\0' f; do

  # Compute names + caches
  HASH="$(shasum -a 256 $f | cut -d' ' -f1)"
  SOURCE_FILENAME="$f"
  CANONICAL_NAME="$(echo $SOURCE_FILENAME | tr "[:lower:]" "[:upper:]")"
  CACHED_FILENAME=".cache/v2x$HASH"

  if [[ ! -f "$CACHED_FILENAME" ]]; then
    cp "$f" "$CACHED_FILENAME"

    # EXIF metadata stripping
    if [[
      "$CANONICAL_NAME" == *.JPG ||
      "$CANONICAL_NAME" == *.JPEG ||
      "$CANONICAL_NAME" == *.PNG ||
      "$CANONICAL_NAME" == *.GIF ||
      "$CANONICAL_NAME" == *.TIFF
    ]]; then
      echo "stripping tags in $CANONICAL_NAME ($CACHED_FILENAME)..."
      exiftool -overwrite_original -all= -tagsfromfile @ -Orientation "$CACHED_FILENAME" || exit 1
    fi

    # PNG optmization
    if [[ "$CANONICAL_NAME" == *.PNG ]]; then
      echo "optipng $CANONICAL_NAME ($CACHED_FILENAME)..."
      optipng -quiet "$CACHED_FILENAME" || exit 1
    fi

    # JPG optimization
    if [[
      "$CANONICAL_NAME" == *.JPG ||
      "$CANONICAL_NAME" == *.JPEG
    ]]; then
      echo "jpegoptim $CANONICAL_NAME ($CACHED_FILENAME)..."
      jpegoptim --size=300k "$CACHED_FILENAME" || exit 1
    fi

  else
    # print hit
    echo "cache hit for $CANONICAL_NAME ($CACHED_FILENAME)..."
  fi

  # Copy out
  cp "$CACHED_FILENAME" "$SOURCE_FILENAME" || exit 1
done