#!/bin/sh
# Install Cuvette on macOS or Linux.
#   curl -fsSL https://cuvette.ai/install.sh | sh
# Settings:
#   CUVETTE_FROM=npm|source   force one install method (default: npm if the package is published)
#   CUVETTE_SRC=<folder>      the folder for the source install (default: ~/.local/share/cuvette/src)
#   CUVETTE_REF=<ref>         the branch or tag for the source install (default: main)
set -eu

REPO=https://github.com/elparko/cuvette
PKG=@elparko/cuvette

say() { printf '%s\n' "$*"; }
warn() { printf 'Warning: %s\n' "$*" >&2; }
fail() { printf 'Error: %s\n' "$*" >&2; exit 1; }
has() { command -v "$1" >/dev/null 2>&1; }

from_npm() {
  say "Install $PKG from npm."
  npm install -g "$PKG" || fail "npm could not install $PKG. If the error is EACCES, set an npm prefix that you own: https://docs.npmjs.com/resolving-eacces-permissions-errors-when-installing-packages-globally"
}

from_source() {
  has git || fail "git is not installed. Install git, then run this script again."
  src=${CUVETTE_SRC:-$HOME/.local/share/cuvette/src}
  ref=${CUVETTE_REF:-main}
  if [ -d "$src/.git" ]; then
    say "Update the source in $src."
    git -C "$src" fetch --depth 1 origin "$ref"
    git -C "$src" checkout -q FETCH_HEAD
  else
    say "Get the source from $REPO into $src."
    mkdir -p "$(dirname "$src")"
    git clone -q --depth 1 --branch "$ref" "$REPO" "$src"
  fi
  (cd "$src" && npm ci --omit=dev --no-audit --no-fund && npm link --no-audit --no-fund) ||
    fail "npm could not install Cuvette from $src. If the error is EACCES, set an npm prefix that you own: https://docs.npmjs.com/resolving-eacces-permissions-errors-when-installing-packages-globally"
}

main() {
  case "$(uname -s)" in
    Darwin | Linux) ;;
    *) fail "This script is for macOS and Linux. On Windows, install Node.js 22 and run: npm i -g $PKG" ;;
  esac

  has node || fail "Node.js is not installed. Cuvette needs Node.js 22 or later. Get it from https://nodejs.org"
  has npm || fail "npm is not installed. npm comes with Node.js. Get Node.js from https://nodejs.org"
  major=$(node -p 'process.versions.node.split(".")[0]')
  [ "$major" -ge 22 ] || fail "Node.js $(node -v) is too old. Cuvette needs Node.js 22 or later."
  say "Node.js $(node -v)"

  if has python3; then
    say "$(python3 --version 2>&1)"
  else
    warn "Python 3 is not installed. Most adapters need it. 'cuvette doctor' tells what to install."
  fi

  how=${CUVETTE_FROM:-}
  if [ -z "$how" ]; then
    if npm view "$PKG" version >/dev/null 2>&1; then how=npm; else how=source; fi
  fi
  case "$how" in
    npm) from_npm ;;
    source) from_source ;;
    *) fail "CUVETTE_FROM must be npm or source, not '$how'." ;;
  esac

  if ! has cuvette; then
    warn "The cuvette command is not on your PATH. Add $(npm prefix -g)/bin to PATH, then open a new terminal."
    exit 0
  fi
  say ""
  say "Cuvette is installed. Check your computer:"
  cuvette doctor || true
  say ""
  say "To start a session, open a terminal in your data folder and run: cuvette"
}

main "$@"