#!/bin/sh
# beacon.host installer: the publish-website agent skill, then the beacon CLI.
#
#   curl -fsSL https://beacon.host/install.sh | sh
#
# Never uses sudo. Environment overrides:
#   BEACON_INSTALL_DIR   where the beacon binary goes (default ~/.local/bin)
#   BEACON_SKIP_SKILL=1  don't install the agent skill
#   BEACON_SKIP_CLI=1    install only the agent skill
set -eu

BASE_URL="${BEACON_BASE_URL:-https://beacon.host}"
INSTALL_DIR="${BEACON_INSTALL_DIR:-$HOME/.local/bin}"
SKILL_NAME="publish-website"
TMP_DIR="$(mktemp -d)"

cleanup() {
  rm -rf "$TMP_DIR"
}
trap cleanup EXIT INT TERM

need() {
  if ! command -v "$1" >/dev/null 2>&1; then
    echo "install.sh: missing required command: $1" >&2
    exit 1
  fi
}

need curl

# 1. The agent skill. Claude Code reads ~/.claude/skills; Codex, Cursor and
#    most other agents read ~/.agents/skills. With it installed, future agent
#    sessions know how to publish to beacon.host without being told.
if [ "${BEACON_SKIP_SKILL:-}" != "1" ]; then
  SKILL_FILE="$TMP_DIR/SKILL.md"
  curl -fsSL "$BASE_URL/skill.md?ref=install-sh" -o "$SKILL_FILE"
  if [ "$(head -n 1 "$SKILL_FILE")" != "---" ] || ! grep -q "^name: $SKILL_NAME\$" "$SKILL_FILE"; then
    echo "install.sh: $BASE_URL/skill.md is not a valid skill file; not installing it" >&2
    exit 1
  fi
  for dir in "$HOME/.claude/skills/$SKILL_NAME" "$HOME/.agents/skills/$SKILL_NAME"; do
    mkdir -p "$dir"
    cp "$SKILL_FILE" "$dir/SKILL.md"
  done
  echo "Skill installed: future agent sessions will use beacon.host when you say \"publish this\" or \"deploy an API\""
fi

if [ "${BEACON_SKIP_CLI:-}" = "1" ]; then
  exit 0
fi

# 2. The beacon CLI, into a directory you own.
need tar

OS="$(uname -s | tr '[:upper:]' '[:lower:]')"
ARCH="$(uname -m)"

case "$OS" in
  darwin) OS="darwin" ;;
  linux) OS="linux" ;;
  *) echo "install.sh: unsupported OS: $OS" >&2; exit 1 ;;
esac

case "$ARCH" in
  arm64|aarch64) ARCH="arm64" ;;
  x86_64|amd64) ARCH="amd64" ;;
  *) echo "install.sh: unsupported architecture: $ARCH" >&2; exit 1 ;;
esac

LATEST="$TMP_DIR/latest.json"
curl -fsSL "$BASE_URL/downloads/beacon/latest.json" -o "$LATEST"

VERSION="$(sed -n 's/.*"version"[[:space:]]*:[[:space:]]*"\([^"]*\)".*/\1/p' "$LATEST" | head -n 1)"
if [ -z "$VERSION" ]; then
  echo "install.sh: could not read version from latest.json" >&2
  exit 1
fi

NAME="beacon-$OS-$ARCH.tar.gz"
URL="$BASE_URL/downloads/beacon/$VERSION/$NAME"
ARCHIVE="$TMP_DIR/$NAME"

curl -fsSL "$URL" -o "$ARCHIVE"
curl -fsSL "$BASE_URL/downloads/beacon/$VERSION/checksums.txt" -o "$TMP_DIR/checksums.txt"

if command -v shasum >/dev/null 2>&1; then
  (cd "$TMP_DIR" && grep "  $NAME\$" checksums.txt | shasum -a 256 -c -)
elif command -v sha256sum >/dev/null 2>&1; then
  (cd "$TMP_DIR" && grep "  $NAME\$" checksums.txt | sha256sum -c -)
else
  echo "install.sh: warning: shasum/sha256sum not found; skipping checksum verification" >&2
fi

tar -xzf "$ARCHIVE" -C "$TMP_DIR"
chmod +x "$TMP_DIR/beacon"

if ! mkdir -p "$INSTALL_DIR" 2>/dev/null || [ ! -w "$INSTALL_DIR" ]; then
  echo "install.sh: cannot write to $INSTALL_DIR; set BEACON_INSTALL_DIR to a directory you own" >&2
  exit 1
fi
mv "$TMP_DIR/beacon" "$INSTALL_DIR/beacon"

echo "Installed beacon $VERSION to $INSTALL_DIR/beacon"

case ":$PATH:" in
  *":$INSTALL_DIR:"*) ;;
  *)
    case "${SHELL:-}" in
      */zsh) RC="~/.zshrc" ;;
      */bash) RC="~/.bashrc" ;;
      *) RC="~/.profile" ;;
    esac
    echo ""
    echo "$INSTALL_DIR is not on your PATH. Add it, then open a new terminal:"
    echo "  echo 'export PATH=\"$INSTALL_DIR:\$PATH\"' >> $RC"
    echo "Until then, run it as $INSTALL_DIR/beacon"
    ;;
esac