#!/usr/bin/env bash

# TODO: Build custom Recursive Code font?

set -euo pipefail

# shellcheck disable=SC2034
DRY_RUN=0 # TODO
# shellcheck disable=SC2034
FORCE=0 # TODO

NAME=${0##*/}
VERSION="0.1.0"
API_URL="https://api.github.com"
REPO_OWNER="arrowtype"
REPO_NAME="recursive"
REPO_PATH="$REPO_OWNER/$REPO_NAME"
FONT_DIR="${HOME}/.local/share/fonts/ttf/Recursive"
TMPDIR=${TMPDIR:-/tmp}

err() {
  printf "%s\n" "$@" >&2
}

err "$NAME v$VERSION"

curl() {
  command curl \
    -sSLf \
    -H "User-Agent: $NAME/$VERSION" \
    "$@"
}

api() {
  curl \
    -H "Accept: application/vnd.github+json" \
    "$@"
}

jq() {
  command jq -c "$@"
}

get_latest_release() {
  api --get "$API_URL/repos/$REPO_PATH/releases/latest" \
    | jq "$(cat <<QUERY
. as \$parent |
{
  id,
  tag: .tag_name,
  asset: first(
    .assets[] |
    select(
      (.content_type == "application/zip")
      and (
        (.name | contains(\$parent.tag_name))
        or (.name | contains(\$parent.tag_name | ltrimstr("v"))))) |
    {
      url,
      download_url: .browser_download_url,
      id,
      name,
      content_type
    }
  )
}
QUERY
)"
}

[[ -d "$FONT_DIR" ]] || mkdir -p "$FONT_DIR"

latest_release=$(get_latest_release)
rec_ver=$(jq -r '.tag | ltrimstr("v")' <<< "$latest_release")
err "Latest version is $rec_ver"
vf_file_name="Recursive_VF_${rec_ver}.ttf"
file_url=$(jq -r '.asset.download_url' <<< "$latest_release")
file_name=${file_url##*/}

if [[ -f "${FONT_DIR}/${vf_file_name}" ]]; then
  err "Latest Recursive font already installed"
  exit 0
fi

dl_path="${TMPDIR}/${file_name}"
if [[ -f "$dl_path" ]]; then
  err "${dl_path} already exists, skipping download"
else
  err "Downloading ${file_url} to ${dl_path}"
  curl -o "$dl_path" "$file_url"
fi

err "Deleting old font files"
rm -f "$FONT_DIR/Recursive_VF_*.ttf" "$FONT_DIR/recursive-static-TTFs.ttc"

err "Unzipping relevant files to $FONT_DIR"
unzip -j "$dl_path" '*/Recursive_Desktop/Recursive_VF_*.ttf' '*/Recursive_Desktop/recursive-static-TTFs.ttc' -d "$FONT_DIR"
err "Deleting zip file"
rm -f "$dl_path"

err "Writing version to file"
echo  "$rec_ver" > "$FONT_DIR/.VERSION"

err "Running fc-cache"
fc-cache