#!/bin/sh
# install easl 0.1.0: curl -fsSL https://easl.sh/install | sh
#
# downloads the release zip from github, checks its sha-256 against the pin below and moves
# easl.app into /Applications (~/Applications if /Applications isn't writable). no sudo, no brew,
# no quarantine changes: curl sets no quarantine flag, so the app opens without a prompt.
# everything runs from main on the last line, so a cut-off download runs nothing.
#
# testing: EASL_INSTALL_DIR=/some/dir installs there instead of /Applications.
set -eu

VERSION=0.1.0
URL=https://github.com/twaldin/easl/releases/download/v0.1.0/easl-0.1.0.zip
SHA256=97a7b1f99a25b23af5646c022c02d7bf36b76760635c05cc4a2aeb0fa5df5788
BUNDLE_ID=net.waldin.easl
APP=easl.app

say() { printf 'easl: %s\n' "$*"; }
die() { printf 'easl: %s\n' "$*" >&2; exit 1; }

main() {
  # macos 14+ on apple silicon. hw.optional.arm64 is 1 even in a rosetta shell, where uname -m says x86_64.
  [ "$(uname -s)" = Darwin ] || die "easl is a mac app: it needs macos 14 or later on apple silicon"
  macos=$(sw_vers -productVersion)
  [ "${macos%%.*}" -ge 14 ] || die "easl needs macos 14 or later; this mac runs $macos"
  [ "$(sysctl -n hw.optional.arm64 2>/dev/null)" = 1 ] || die "easl needs an apple silicon mac; there's no intel build"

  # /Applications, or ~/Applications if this user can't write there
  dir=${EASL_INSTALL_DIR:-/Applications}
  if [ ! -w "$dir" ]; then
    say "can't write to $dir, so installing to ~/Applications instead"
    dir=$HOME/Applications
    mkdir -p "$dir"
  fi
  dest=$dir/$APP

  # download into a temp dir that's removed on exit, then check it's the published zip
  tmp=$(mktemp -d)
  trap 'rm -rf "$tmp"' EXIT
  trap 'exit 1' INT TERM
  say "downloading easl $VERSION"
  curl -fsSL -o "$tmp/easl.zip" "$URL"
  sum=$(shasum -a 256 "$tmp/easl.zip" | cut -d ' ' -f 1)
  [ "$sum" = "$SHA256" ] || die "checksum mismatch, nothing installed (expected $SHA256, got $sum)"
  ditto -x -k "$tmp/easl.zip" "$tmp/unzipped"
  [ -d "$tmp/unzipped/$APP" ] || die "the zip has no $APP, nothing installed"

  # never replace a running app, and never delete an app that isn't easl
  if pgrep -x Easl >/dev/null; then die "easl is running: quit easl first (your terminals keep running)"; fi
  if [ -e "$dest" ] || [ -L "$dest" ]; then
    id=$(plutil -extract CFBundleIdentifier raw -o - "$dest/Contents/Info.plist" 2>/dev/null || true)
    [ "$id" = "$BUNDLE_ID" ] || die "$dest isn't easl ($BUNDLE_ID); move it aside and run this again"
    rm -rf "$dest"
  fi
  mv "$tmp/unzipped/$APP" "$dest"

  # zmx runs terminal tiles; bun runs the easl cli and the omp extension. suggest them, never install.
  missing=
  command -v zmx >/dev/null || missing="$missing zmx"
  command -v bun >/dev/null || missing="$missing bun"
  if [ -n "$missing" ]; then
    say "missing:$missing (zmx runs terminal tiles, bun the easl cli)"
    command -v brew >/dev/null || say "first get homebrew: https://brew.sh"
    say "install them with: brew install neurosnap/tap/zmx oven-sh/bun/bun"
  fi

  version=$(plutil -extract CFBundleShortVersionString raw -o - "$dest/Contents/Info.plist")
  say "installed easl $version in $dest"
  say "open it: open -a easl"
}

main "$@"