#!/bin/sh
# curl -fsSL marcusx.fun | sh
# Makes this computer a full member: its own VPS, a door to every other machine,
# and the master MCP hub. It dials OUT. Nothing listens. Nothing is opened.
set -e
G='\033[92m'; C='\033[96m'; D='\033[2m'; B='\033[1m'; X='\033[0m'
printf "\n${B}  joining the mesh${X}\n\n"

P=""
for c in python3 python py; do command -v "$c" >/dev/null 2>&1 && { P="$c"; break; }; done
if [ -z "$P" ]; then
  printf "  installing python...\n"
  if   command -v brew    >/dev/null 2>&1; then brew install python >/dev/null 2>&1
  elif command -v apt-get >/dev/null 2>&1; then sudo apt-get update -qq && sudo apt-get install -y -qq python3
  elif command -v dnf     >/dev/null 2>&1; then sudo dnf install -y -q python3
  elif command -v pacman  >/dev/null 2>&1; then sudo pacman -S --needed --noconfirm python
  elif command -v apk     >/dev/null 2>&1; then sudo apk add python3; fi
  for c in python3 python py; do command -v "$c" >/dev/null 2>&1 && { P="$c"; break; }; done
fi
[ -z "$P" ] && { echo "  need python — install it, then run this again"; exit 1; }

mkdir -p "$HOME/.mesh" "$HOME/bin"

# 1. the door: this machine dials out and holds the line
curl -fsSL https://tower.marcusx.fun/agent.py -o "$HOME/.mesh/agent.py"
CR_WHO="$(hostname 2>/dev/null || echo machine)"; export CR_WHO
pkill -f '.mesh/agent.py' 2>/dev/null || true
nohup "$P" "$HOME/.mesh/agent.py" >"$HOME/.mesh/agent.log" 2>&1 &
printf "  ${G}✓${X} door open      ${D}%s dials out · nothing listens${X}\n" "$CR_WHO"

# 2. keep it open across reboots
if [ "$(uname)" = "Darwin" ]; then
  mkdir -p "$HOME/Library/LaunchAgents"
  cat > "$HOME/Library/LaunchAgents/fun.marcusx.mesh.plist" <<PL
<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0"><dict>
<key>Label</key><string>fun.marcusx.mesh</string>
<key>ProgramArguments</key><array><string>$P</string><string>$HOME/.mesh/agent.py</string></array>
<key>EnvironmentVariables</key><dict><key>CR_WHO</key><string>$CR_WHO</string></dict>
<key>RunAtLoad</key><true/><key>KeepAlive</key><true/>
</dict></plist>
PL
  launchctl unload "$HOME/Library/LaunchAgents/fun.marcusx.mesh.plist" 2>/dev/null || true
  launchctl load "$HOME/Library/LaunchAgents/fun.marcusx.mesh.plist" 2>/dev/null || true
elif command -v systemctl >/dev/null 2>&1; then
  mkdir -p "$HOME/.config/systemd/user"
  cat > "$HOME/.config/systemd/user/mesh.service" <<SV
[Unit]
Description=marcusx mesh door
[Service]
Environment=CR_WHO=$CR_WHO
ExecStart=$P $HOME/.mesh/agent.py
Restart=always
RestartSec=5
[Install]
WantedBy=default.target
SV
  systemctl --user daemon-reload 2>/dev/null || true
  systemctl --user enable --now mesh.service 2>/dev/null || true
fi
printf "  ${G}✓${X} survives reboot\n"

# 3. the pearl command: every machine + the master MCP hub, from this shell
curl -fsSL https://marcusx.fun/pearl -o "$HOME/bin/pearl" && chmod +x "$HOME/bin/pearl"
printf "  ${G}✓${X} pearl installed ${D}· %s/bin/pearl${X}\n" "$HOME"
curl -fsSL https://marcusx.fun/gesherel -o "$HOME/bin/gesherel" && chmod +x "$HOME/bin/gesherel"
printf "  ${G}✓${X} gesherel ready  ${D}· type: gesherel${X}\n"

case ":$PATH:" in *":$HOME/bin:"*) :;; *)
  for rc in "$HOME/.bashrc" "$HOME/.zshrc"; do
    [ -f "$rc" ] && ! grep -q 'mesh:PATH' "$rc" && printf '\nexport PATH="$HOME/bin:$PATH"  # mesh:PATH\n' >> "$rc"
  done;; esac

printf "\n${B}  you are on the mesh.${X}\n"
printf "  ${C}pearl${X}            ${D}every machine, every MCP, every tool${X}\n"
printf "  ${C}pearl <machine>${X}  ${D}raw shell on any of them${X}\n"
printf "  ${D}leave: pkill -f .mesh/agent.py${X}\n\n"