#!/usr/bin/env bash
# claudemesh-cli installer
# Source: https://claudemesh.com/install
# Audit: curl -fsSL https://claudemesh.com/install | less
set -euo pipefail

RED=$'\033[31m'; GREEN=$'\033[32m'; DIM=$'\033[2m'; BOLD=$'\033[1m'; RESET=$'\033[0m'

say() { printf "%s\n" "$*"; }
ok()  { printf "%s✓%s %s\n" "${GREEN}" "${RESET}" "$*"; }
err() { printf "%s✗%s %s\n" "${RED}" "${RESET}" "$*" >&2; }

say ""
say "${BOLD}claudemesh-cli installer${RESET}"
say "$(printf '%.0s─' {1..40})"

# --- preflight ------------------------------------------------------
# Prefer npm when Node 20+ is present. Otherwise fall back to a
# self-contained binary download from GitHub Releases (installs to
# ~/.claudemesh/bin and adds a shim at ~/.local/bin/claudemesh).

detect_os() {
  case "$(uname -s)" in
    Darwin) echo darwin ;;
    Linux)  echo linux  ;;
    *)      echo ""     ;;
  esac
}
detect_arch() {
  case "$(uname -m)" in
    x86_64|amd64)  echo x64   ;;
    arm64|aarch64) echo arm64 ;;
    *)             echo ""    ;;
  esac
}

install_via_binary() {
  local os arch url target dir shim
  os=$(detect_os); arch=$(detect_arch)
  if [ -z "$os" ] || [ -z "$arch" ]; then
    err "No precompiled binary for $(uname -s)/$(uname -m). Install Node 20+ or build from source."
    exit 1
  fi
  dir="${HOME}/.claudemesh/bin"
  mkdir -p "$dir"
  target="${dir}/claudemesh"
  url="https://github.com/alezmad/claudemesh/releases/latest/download/claudemesh-${os}-${arch}"
  say "Downloading ${BOLD}${url}${RESET}…"
  if ! curl -fsSL "$url" -o "$target"; then
    err "Download failed. Falling back to npm."
    return 1
  fi
  chmod +x "$target"
  shim="${HOME}/.local/bin/claudemesh"
  mkdir -p "${HOME}/.local/bin"
  printf '#!/bin/sh\nexec "%s" "$@"\n' "$target" > "$shim"
  chmod +x "$shim"
  ok "claudemesh binary installed → ${target}"
  case ":$PATH:" in
    *":${HOME}/.local/bin:"*) : ;;
    *)
      say ""
      say "${BOLD}Add ${HOME}/.local/bin to PATH${RESET} (add to your shell rc):"
      say "  export PATH=\"${HOME}/.local/bin:$PATH\""
      ;;
  esac
  return 0
}

install_via_npm() {
  ok "Node.js $(node -v)"
  ok "npm $(npm -v)"
  say ""
  say "Installing ${BOLD}claudemesh-cli${RESET} from npm…"
  if ! npm install -g claudemesh-cli; then
    err "npm install failed."
    say "   If this is a permissions error on macOS/Linux, try:"
    say "   ${DIM}sudo npm install -g claudemesh-cli${RESET}"
    say "   or configure npm to use a user-owned prefix:"
    say "   ${DIM}https://docs.npmjs.com/resolving-eacces-permissions-errors${RESET}"
    exit 1
  fi
  ok "claudemesh-cli installed ($(claudemesh --version))"
}

if command -v node >/dev/null 2>&1; then
  NODE_MAJOR=$(node -p "process.versions.node.split('.')[0]" 2>/dev/null || echo 0)
  if [ "$NODE_MAJOR" -ge 20 ] && command -v npm >/dev/null 2>&1; then
    install_via_npm
  else
    say "Node.js < 20 or no npm — using standalone binary."
    install_via_binary || install_via_npm
  fi
else
  say "Node.js not detected — installing standalone binary (no Node required)."
  install_via_binary
fi

# --- register MCP + hooks ------------------------------------------

say ""
say "Registering Claude Code MCP server + status hooks…"
if ! claudemesh install; then
  err "claudemesh install failed — run it manually to see the error."
  exit 1
fi

# --- done -----------------------------------------------------------

say ""
say "${GREEN}${BOLD}Done.${RESET}"
say ""
say "Next steps:"
say "  1. Paste your invite link:  ${BOLD}claudemesh <invite-url>${RESET}"
say "     (joins + launches Claude Code in one step)"
say ""
say "  2. Enable click-to-launch from email:"
say "     ${BOLD}claudemesh url-handler install${RESET}"
say ""
say "  3. Shell completions (optional):"
say "     ${DIM}claudemesh completions zsh > ~/.zfunc/_claudemesh${RESET}"
say ""
say "Need an invite? Visit ${BOLD}https://claudemesh.com${RESET}"
say ""