#!/usr/bin/env bash

command -v grep >/dev/null 2>&1 || { echo >&2 "[grep] is required, but not installed.  Aborting."; exit 1; }
command -v awk >/dev/null 2>&1 || { echo >&2 "[awk] is required, but not installed.  Aborting."; exit 1; }
command -v sed >/dev/null 2>&1 || { echo >&2 "[sed] is required, but not installed.  Aborting."; exit 1; }
command -v curl >/dev/null 2>&1 || { echo >&2 "[curl] is required, but not installed.  Aborting."; exit 1; }
command -v nix-prefetch-url >/dev/null 2>&1 || { echo >&2 "[nix-prefetch-url] is required, but not installed.  Aborting."; exit 1; }

ROOT="$(dirname "$(readlink -f "$0")")"
if [ ! -f "$ROOT/vscode.nix" ]; then
  echo "ERROR: cannot find vscode.nix in $ROOT"
  exit 1
fi
if [ ! -f "$ROOT/vscodium.nix" ]; then
  echo "ERROR: cannot find vscodium.nix in $ROOT"
  exit 1
fi

# VSCode

VSCODE_VER=$(curl -s -L "https://code.visualstudio.com/Download" | grep "is now available" | awk -F'</span>' '{print $1}' | awk -F'>' '{print $NF}')
VSCODE_VER=$(curl -s -L "https://code.visualstudio.com/updates/v${VSCODE_VER/./_}" | grep "Downloads:" | awk -F'code.visualstudio.com/' '{print $2}' | awk -F'/' '{print $1}')
sed -i "s/version = \".*\"/version = \"${VSCODE_VER}\"/" "$ROOT/vscode.nix"

VSCODE_LINUX_URL="https://vscode-update.azurewebsites.net/${VSCODE_VER}/linux-x64/stable"
VSCODE_LINUX_SHA256=$(nix-prefetch-url ${VSCODE_LINUX_URL})
sed -i "s/x86_64-linux = \".\{52\}\"/x86_64-linux = \"${VSCODE_LINUX_SHA256}\"/" "$ROOT/vscode.nix"

VSCODE_DARWIN_URL="https://vscode-update.azurewebsites.net/${VSCODE_VER}/darwin/stable"
VSCODE_DARWIN_SHA256=$(nix-prefetch-url ${VSCODE_DARWIN_URL})
sed -i "s/x86_64-darwin = \".\{52\}\"/x86_64-darwin = \"${VSCODE_DARWIN_SHA256}\"/" "$ROOT/vscode.nix"

# VSCodium

VSCODIUM_VER=$(curl -Ls -w %{url_effective} -o /dev/null https://github.com/VSCodium/vscodium/releases/latest | awk -F'/' '{print $NF}')
sed -i "s/version = \".*\"/version = \"${VSCODIUM_VER}\"/" "$ROOT/vscodium.nix"

VSCODIUM_LINUX_URL="https://github.com/VSCodium/vscodium/releases/download/${VSCODIUM_VER}/VSCodium-linux-x64-${VSCODIUM_VER}.tar.gz"
VSCODIUM_LINUX_SHA256=$(nix-prefetch-url ${VSCODIUM_LINUX_URL})
sed -i "s/x86_64-linux = \".\{52\}\"/x86_64-linux = \"${VSCODIUM_LINUX_SHA256}\"/" "$ROOT/vscodium.nix"

VSCODIUM_DARWIN_URL="https://github.com/VSCodium/vscodium/releases/download/${VSCODIUM_VER}/VSCodium-darwin-${VSCODIUM_VER}.zip"
VSCODIUM_DARWIN_SHA256=$(nix-prefetch-url ${VSCODIUM_DARWIN_URL})
sed -i "s/x86_64-darwin = \".\{52\}\"/x86_64-darwin = \"${VSCODIUM_DARWIN_SHA256}\"/" "$ROOT/vscodium.nix"