#!/bin/sh

set -o errexit
set -o nounset

UNAME="$(uname)"
ARCH="$(uname -m)"
OUTPUT="${2:-/usr/local}"

if [ "$UNAME" = "Darwin" ] || [ "$UNAME" = "Linux" ]
then
  echo "---- Fetching the pre-built JSON Schema CLI binary from GitHub Releases" 1>&2
  OWNER="sourcemeta"
  REPOSITORY="jsonschema"

  if [ $# -lt 1 ] || [ "$1" = "latest" ]
  then
    VERSION="$(curl --retry 5 --silent "https://api.github.com/repos/$OWNER/$REPOSITORY/releases/latest" \
      | grep '"tag_name"' | cut -d ':' -f 2 | tr -d 'v" ,')"
  else
    VERSION="$1"
  fi

  PACKAGE_BASE_URL="https://github.com/$OWNER/$REPOSITORY/releases/download/v$VERSION"
  PACKAGE_PLATFORM_NAME="$(echo "$UNAME" | tr '[:upper:]' '[:lower:]')"

  if [ "$UNAME" = "Linux" ] && [ -f /etc/os-release ] && grep -qi alpine /etc/os-release
  then
    PACKAGE_NAME="jsonschema-$VERSION-$PACKAGE_PLATFORM_NAME-$ARCH-musl"
  else
    PACKAGE_NAME="jsonschema-$VERSION-$PACKAGE_PLATFORM_NAME-$ARCH"
  fi

  PACKAGE_URL="$PACKAGE_BASE_URL/$PACKAGE_NAME.zip"
  echo "---- Fetching version v$VERSION from $PACKAGE_URL" 1>&2
  TMP="$(mktemp -d)"
  clean() { rm -rf "$TMP"; }
  trap clean EXIT
  curl --retry 5 --location --output "$TMP/artifact.zip" "$PACKAGE_URL"
  unzip "$TMP/artifact.zip" -d "$TMP/out"
  install -d -m 0755 "$OUTPUT/bin"
  install -v -m 0755 "$TMP/out/$PACKAGE_NAME/bin/jsonschema" "$OUTPUT/bin"
  echo "" 1>&2
  echo "Tip: Try the Sourcemeta Studio VS Code extension for an enhanced experience!" 1>&2
  echo "     Open in VS Code: vscode:extension/sourcemeta.sourcemeta-studio" 1>&2
  echo "     Or visit: https://marketplace.visualstudio.com/items?itemName=sourcemeta.sourcemeta-studio" 1>&2
else
  echo "ERROR: I don't know how to install the JSON Schema CLI in $UNAME!" 1>&2
  echo "Open an issue here: https://github.com/sourcemeta/jsonschema/issues" 1>&2
  exit 1
fi