#!/bin/sh
# KHAELOR
# File: website/public/install.sh
# Description: Hosted installer for the KHAELOR CLI — checks Node >= 22 and npm, installs the tarball globally, verifies.
#
# Author: Simon-Pierre Boucher
# Contact: contact@spboucher.ai
#
# Usage:  curl -fsSL https://www.khaelor.sh/install.sh | sh
#
# This script never runs sudo on its own. If a global npm install needs
# elevated permissions, it prints exactly what to do instead.

set -eu

TARBALL_URL="https://www.khaelor.sh/khaelor.tgz"
MIN_NODE_MAJOR=22

say()  { printf '%s\n' "$*"; }
fail() { printf 'khaelor install: error: %s\n' "$*" >&2; exit 1; }

say ""
say "  KHAELOR installer"
say "  https://www.khaelor.sh"
say ""

# ── 1. node ─────────────────────────────────────────────────────────────
if ! command -v node >/dev/null 2>&1; then
  fail "Node.js was not found on your PATH.

KHAELOR requires Node.js ${MIN_NODE_MAJOR} or newer. Install it with one of:
  - https://nodejs.org (official installers)
  - brew install node          (Homebrew, macOS)
  - nvm install ${MIN_NODE_MAJOR}               (nvm)
then re-run:  curl -fsSL https://www.khaelor.sh/install.sh | sh"
fi

NODE_VERSION="$(node --version 2>/dev/null || true)"
# node --version prints e.g. v22.11.0 — extract the major.
NODE_MAJOR="$(printf '%s' "$NODE_VERSION" | sed -e 's/^v//' -e 's/\..*$//')"
case "$NODE_MAJOR" in
  ''|*[!0-9]*) fail "could not parse Node.js version from 'node --version' (got: ${NODE_VERSION:-nothing})." ;;
esac
if [ "$NODE_MAJOR" -lt "$MIN_NODE_MAJOR" ]; then
  fail "Node.js ${NODE_VERSION} is too old.

KHAELOR requires Node.js ${MIN_NODE_MAJOR} or newer. Upgrade with one of:
  - https://nodejs.org
  - brew upgrade node          (Homebrew, macOS)
  - nvm install ${MIN_NODE_MAJOR}               (nvm)"
fi
say "  node ${NODE_VERSION} ... ok"

# ── 2. npm ──────────────────────────────────────────────────────────────
if ! command -v npm >/dev/null 2>&1; then
  fail "npm was not found on your PATH.

npm normally ships with Node.js. If you installed Node another way, install
npm too, then re-run this script."
fi
say "  npm $(npm --version 2>/dev/null || say '?') ... ok"

# ── 3. install ──────────────────────────────────────────────────────────
say ""
say "  Installing KHAELOR from ${TARBALL_URL} ..."
say ""

if ! npm install -g "$TARBALL_URL"; then
  say "" >&2
  say "khaelor install: 'npm install -g' failed." >&2
  say "" >&2
  say "If the error above mentions EACCES (permission denied), your global npm" >&2
  say "prefix is owned by root. The clean fix is a user-owned prefix — this" >&2
  say "script will NOT run sudo for you:" >&2
  say "" >&2
  say "    mkdir -p ~/.npm-global" >&2
  say "    npm config set prefix ~/.npm-global" >&2
  say "    export PATH=\"\$HOME/.npm-global/bin:\$PATH\"   # add to your shell profile" >&2
  say "    npm install -g ${TARBALL_URL}" >&2
  say "" >&2
  say "For any other error, the npm output above has the details." >&2
  exit 1
fi

# ── 4. verify ───────────────────────────────────────────────────────────
if ! command -v khaelor >/dev/null 2>&1; then
  fail "install completed but 'khaelor' is not on your PATH.

Your npm global bin directory is probably not on PATH. Find it with:
    npm prefix -g
then add '<that prefix>/bin' to PATH in your shell profile and open a new shell."
fi

KHAELOR_VERSION="$(khaelor --version 2>/dev/null || true)"
if [ -z "$KHAELOR_VERSION" ]; then
  fail "'khaelor --version' did not run cleanly. Try running it directly to see the error."
fi

# ── 5. next steps ───────────────────────────────────────────────────────
say ""
say "  KHAELOR ${KHAELOR_VERSION} installed."
say ""
say "  Next steps:"
say ""
say "    1. Set your Anthropic API key (add to your shell profile to persist):"
say "         export ANTHROPIC_API_KEY=sk-ant-..."
say ""
say "    2. Start it inside a project:"
say "         cd your-project && khaelor"
say ""
say "  Docs: https://www.khaelor.sh/docs/getting-started.html"
say ""