#!/usr/bin/env bash
set -e

usage() {
    cat <<'EOF'
Usage:
  optimize-svg [--check] [filename]
  optimize-svg --help

Options:
  --check
      This will check for unoptimized SVG files rather than automatically optimizing them.
      This allows us to run the script in CI.
  [filename]
      The filename of the SVG file to optimize, located in static/images/integrations/logos.
      If not provided, all files in the directory will be optimized.

EOF
}

# Shell option parsing.  Over time, we'll want to move some of the
# environment variables below into this self-documenting system.
args="$(getopt -o '' --long help,check -n "$0" -- "$@")"
eval "set -- $args"
while true; do
    case "$1" in
        --help)
            usage
            exit 0
            ;;
        --check)
            CHECK_UNOPTIMIZED=1
            shift
            ;;
        --)
            shift
            break
            ;;
    esac
done

if [ "$#" -gt 1 ]; then
    usage >&2
    exit 1
fi

ZULIP_PATH="$(readlink -f "$(dirname "$0")"/../..)"
PNPM="/usr/local/bin/pnpm"
BASE_PATH="static/images/integrations/logos"

if [ "$#" -eq 0 ]; then
    FILE_PATH="$BASE_PATH"
    SVGO_FLAG="-f"
else
    FILE_PATH="$BASE_PATH/$1"
    SVGO_FLAG=""
fi

if [ -n "$CHECK_UNOPTIMIZED" ]; then
    TEMP_PATH=$(mktemp -d svgo_temp_XXXXXX)
    RESULT=$("$PNPM" exec svgo -o "$TEMP_PATH" $SVGO_FLAG "$FILE_PATH" | grep -o '\.[0-9]% = ' | wc -l)
    rm -rf "$TEMP_PATH"
    if [ "$RESULT" -ge 1 ]; then
        echo "ERROR: svgo detected unoptimized SVG file(s)." 1>&2
        echo "Please run tools/setup/optimize-svg and commit the file changes to optimize them."
        exit 1
    else
        echo "SUCCESS: SVG file(s) are optimized!"
    fi
else
    "$PNPM" exec svgo -q $SVGO_FLAG "$FILE_PATH"
    if [ "$#" -eq 0 ]; then
        "$ZULIP_PATH"/tools/setup/generate_integration_bots_avatars.py
    fi
fi