"""`mld prepare <nœud>` : installe les runtimes manquants (Homebrew), copie la config ngrok, active pm2 au démarrage, pose le marqueur."""
import os
import shlex
from . import config, nodes, ssh


def _sudo_pw():
    if os.path.exists(config.SUDO_PW_FILE):
        return open(config.SUDO_PW_FILE).read().strip()
    return None


def prepare(alias, runtimes=None, ka_helpers=False):
    ip = nodes.ip_of(alias)
    if not ip:
        raise SystemExit("nœud %s injoignable" % alias)
    info = nodes.probe(alias, ip)
    have = info.get("runtimes", {})
    want = runtimes or ["node", "pnpm", "pm2", "ngrok", "python@3.14", "python@3.13", "uv", "git"]
    print("prepare %s (%s) — présents : %s" % (alias, ip, ", ".join(k for k, v in have.items() if v)))
    if not have.get("brew"):
        print("  ✗ Homebrew absent : bootstrap requis (Xcode CLT). Lancer d'abord :  mld bootstrap %s" % alias)
        return False
    missing = [r for r in want if not have.get(r)]
    script = ""
    for r in missing:
        if r in config.BREW_FORMULAE:
            fallback = " || npm install -g pm2 >/dev/null 2>&1" if r == "pm2" else ""
            script += "echo '  brew install %s'; brew install -q %s >/dev/null 2>&1%s || echo '   ! échec %s'\n" % (r, config.BREW_FORMULAE[r], fallback, r)
        elif r in config.BREW_CASKS:
            script += "echo '  brew install --cask ngrok'; brew install -q --cask ngrok >/dev/null 2>&1 || brew install -q ngrok/ngrok/ngrok >/dev/null 2>&1 || echo '   ! échec ngrok'\n"
    # config ngrok (authtoken) depuis la passerelle
    if "ngrok" in missing or not have.get("ngrok"):
        if os.path.exists(config.NGROK_CFG):
            rc0, _, _ = ssh.write_remote_file(ip, "/Users/%s/Library/Application Support/ngrok/ngrok.yml" % config.USER, open(config.NGROK_CFG).read(), mode="600")
            script += "echo '  ngrok.yml %s'\n" % ("copié" if rc0 == 0 else "ÉCHEC de copie")
    # marqueur
    script += "[ -f ~/.maclustr-node ] || echo %s > ~/.maclustr-node\n" % alias
    # pm2 startup (launchd) — nécessite sudo
    pw = _sudo_pw()
    script += "if ! ls ~/Library/LaunchAgents 2>/dev/null | grep -qi pm2; then cmd=$(pm2 startup launchd -u %s --hp /Users/%s 2>/dev/null | grep '^sudo' | head -1); if [ -n \"$cmd\" ]; then %s echo \"  pm2 startup: $( ${cmd#sudo } >/dev/null 2>&1 && echo ok || echo 'à faire manuellement')\"; fi; fi\n" % (
        config.USER, config.USER, ("echo %s | sudo -S -v 2>/dev/null;" % shlex.quote(pw)) if pw else "")
    rc, out, err = ssh.run(ip, script, timeout=1800)
    if ka_helpers:
        out += ka_helpers_install(alias, ip)
    print(out)
    if err.strip():
        print("  stderr:", err.strip()[-300:])
    info = nodes.probe(alias, ip)
    still = [r for r in want if not info.get("runtimes", {}).get(r)]
    print("  résultat : %s" % ("tout est là" if not still else "manquent encore " + ", ".join(still)))
    return not still


def bootstrap(alias):
    """Installe Xcode CLT + Homebrew sans GUI. Active un sudo NOPASSWD temporaire (retiré à la fin). Long (plusieurs Go)."""
    ip = nodes.ip_of(alias)
    pw = _sudo_pw()
    if not pw:
        raise SystemExit("mot de passe sudo requis dans %s" % config.SUDO_PW_FILE)
    script = r'''
export LC_ALL=C
echo %s | sudo -S -p '' sh -c 'echo "%s ALL=(ALL) NOPASSWD: ALL" > /etc/sudoers.d/mld-bootstrap && chmod 440 /etc/sudoers.d/mld-bootstrap'
trap 'sudo rm -f /etc/sudoers.d/mld-bootstrap' EXIT
if ! xcode-select -p >/dev/null 2>&1; then
  echo '  installation Command Line Tools...'
  touch /tmp/.com.apple.dt.CommandLineTools.installondemand.in-progress
  PROD=$(softwareupdate -l 2>&1 | grep -oE 'Label: Command Line Tools for Xcode[^,]*' | sed 's/^Label: //' | sort -V | tail -1)
  echo "  produit: ${PROD:-introuvable}"
  if [ -n "$PROD" ]; then sudo softwareupdate -i "$PROD" --verbose 2>&1 | tail -3; fi
  rm -f /tmp/.com.apple.dt.CommandLineTools.installondemand.in-progress
  sudo xcode-select --switch /Library/Developer/CommandLineTools 2>/dev/null || true
fi
if [ ! -x /opt/homebrew/bin/brew ]; then
  echo '  installation Homebrew...'
  NONINTERACTIVE=1 /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)" 2>&1 | tail -4
  grep -q 'opt/homebrew/bin/brew shellenv' ~/.zprofile 2>/dev/null || echo 'eval "$(/opt/homebrew/bin/brew shellenv)"' >> ~/.zprofile
fi
echo "  CLT: $(xcode-select -p 2>/dev/null || echo absent)  brew: $(/opt/homebrew/bin/brew --version 2>/dev/null | head -1 || echo absent)"
''' % (shlex.quote(pw), config.USER)
    rc, out, err = ssh.run(ip, script, timeout=5400)
    print(out)
    if err.strip():
        print("  stderr:", err.strip()[-400:])
    return rc == 0


def gateway_mdns():
    import subprocess
    name = subprocess.run(["scutil", "--get", "LocalHostName"], capture_output=True, text=True).stdout.strip()
    return (name + ".local") if name else nodes.load_lan()["ips"].get(config.GATEWAY, "")


def ka_helpers_install(alias, ip):
    """Pousseur Ka (launchd zsh → git push vers spbgit) + alias SSH `gitsrv` → passerelle + clé autorisée sur la passerelle."""
    assets = os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))), "assets")
    out = ["  ka-helpers sur %s :" % alias]
    ssh.write_remote_file(ip, "/Users/%s/ka-pousseur.sh" % config.USER, open(os.path.join(assets, "ka-pousseur.sh")).read(), mode="755")
    ssh.write_remote_file(ip, "/Users/%s/Library/LaunchAgents/com.ka.pousseur.plist" % config.USER, open(os.path.join(assets, "com.ka.pousseur.plist")).read(), mode="644")
    mdns = gateway_mdns()
    block = "Host gitsrv\n  HostName %s\n  User %s\n  IdentityFile ~/.ssh/ka_guardian_ed25519\n  IdentitiesOnly yes\n  ControlMaster no\n  ControlPath none\n  StrictHostKeyChecking no\n  UserKnownHostsFile /dev/null\n  LogLevel ERROR\n\n" % (mdns, config.USER)
    script = r"""
mkdir -p ~/.ssh ~/ka-guardian-spool; touch ~/.ka-pousseur-repos; chmod 700 ~/.ssh
[ -f ~/.ssh/ka_guardian_ed25519 ] || ssh-keygen -q -t ed25519 -N '' -C "ka-guardian@$(cat ~/.maclustr-node 2>/dev/null || hostname -s)" -f ~/.ssh/ka_guardian_ed25519
# alias gitsrv en TÊTE du config (avant Host *) — remplace un bloc existant
python3 - <<'PYEOF'
import os,re
p=os.path.expanduser('~/.ssh/config'); s=open(p).read() if os.path.exists(p) else ''
s=re.sub(r'(?ms)^Host gitsrv\n(?:[ \t]+.*\n?)*\n?', '', s)
open(p,'w').write(%r + s); os.chmod(p, 0o600); print('  gitsrv -> %s')
PYEOF
cat ~/.ssh/ka_guardian_ed25519.pub
launchctl bootout gui/$(id -u)/com.ka.pousseur >/dev/null 2>&1; launchctl bootstrap gui/$(id -u) ~/Library/LaunchAgents/com.ka.pousseur.plist && echo '  pousseur launchd chargé'
""" % (block, mdns)
    rc, o, e = ssh.run(ip, script, timeout=120)
    pub = [l for l in o.splitlines() if l.startswith("ssh-ed25519")]
    out += ["  " + l for l in o.splitlines() if not l.startswith("ssh-ed25519")]
    if pub:
        ak = os.path.expanduser("~/.ssh/authorized_keys")
        cur = open(ak).read() if os.path.exists(ak) else ""
        if pub[0].split()[1] not in cur:
            with open(ak, "a") as f:
                f.write(pub[0].strip() + "\n")
            out.append("  clé %s autorisée sur la passerelle" % (pub[0].split()[-1] if len(pub[0].split()) > 2 else alias))
        else:
            out.append("  clé déjà autorisée sur la passerelle")
    rc, o, e = ssh.run(ip, "ssh -o BatchMode=yes -o ConnectTimeout=6 gitsrv 'echo ok' 2>&1 | tail -1", timeout=30)
    out.append("  test ssh gitsrv : %s" % (o.strip() or e.strip()[-80:]))
    return "\n".join(out) + "\n"