#!/usr/bin/env bash
# update-all.sh — main post-pull orchestrator for the Ulicraft stack on the host.
#
# Run AFTER `git pull` (it does NOT pull or push). Single source of truth for the
# build + restart steps; the `deploy` skill is just `git pull --ff-only` followed
# by `./update-all.sh --hard`.
#
# Steps (always, in order): render configs → sync server mods → regen landing mod
# list → rebuild landing (www/) → apply via docker compose.
#
# Modes:
#   (default, rolling)  `docker compose up -d --build`, then restart ONLY the
#       services whose mounted inputs actually changed — drasl/nmsr on a config
#       re-render, minecraft on a mod change. Minimal downtime. NOTE: this path
#       canNOT detect changes to caddy's static conf (caddy/conf.d/*.caddy) — it
#       has no pre-pull baseline for them; use --hard for those.
#   --hard              `docker compose down --remove-orphans && up -d --build`.
#       Full restart (Minecraft world downtime); picks up everything, caddy
#       static conf included.
#
# Cautious by design: strict halt on ANY error (set -euo pipefail) — never a
# partial deploy. Fix the cause and re-run. Uses pnpm/node only (never npm).
set -euo pipefail

cd "$(dirname "$0")"   # repo root (this script lives at the root)

# ── args ────────────────────────────────────────────────────────────
HARD=0
case "${1:-}" in
  "")        HARD=0 ;;
  --hard)    HARD=1 ;;
  -h|--help) echo "usage: $0 [--hard]"; exit 0 ;;
  *) echo "unknown arg: $1" >&2; echo "usage: $0 [--hard]" >&2; exit 2 ;;
esac

step() { printf '\n\033[1;36m→ %s\033[0m\n' "$*"; }

cfg_hash() { [ -f "$1" ] && md5sum "$1" | cut -d' ' -f1 || echo absent; }
# Cheap content proxy: jar filenames + sizes (content changes ⇒ size changes).
mods_hash() {
  { find server-mods -maxdepth 1 -name '*.jar' -printf '%f %s\n' 2>/dev/null || true; } \
    | sort | md5sum | cut -d' ' -f1
}

# ── snapshot inputs (rolling mode only) ─────────────────────────────
if [ "$HARD" -eq 0 ]; then
  before_drasl=$(cfg_hash drasl/config/config.toml)
  before_nmsr=$(cfg_hash nmsr/config.toml)
  before_mods=$(mods_hash)
fi

# ── 1. render drasl/nmsr configs from .env (halts on bad input) ─────
step "render-config.sh"
tooling/render-config.sh

# ── 2. mirror the server mod subset into ./server-mods ──────────────
step "sync-server-mods.sh"
tooling/sync-server-mods.sh

# ── 3. regenerate the landing mod list (mods.json + logos) ──────────
# build-modlist.py needs stdlib tomllib (Python >=3.11). The host's default
# `python3` may be older (e.g. Ubuntu 22.04 ships 3.10), so pick the first
# interpreter that satisfies it rather than relying on the shebang.
step "build-modlist.py"
PY=""
for p in python3.13 python3.12 python3.11 python3; do
  command -v "$p" >/dev/null 2>&1 || continue
  if "$p" -c 'import sys; raise SystemExit(0 if sys.version_info >= (3, 11) else 1)' 2>/dev/null; then
    PY="$p"; break
  fi
done
[ -n "$PY" ] || { echo "no python >=3.11 found (build-modlist.py needs stdlib tomllib)" >&2; exit 1; }
"$PY" tooling/build-modlist.py

# ── 4. rebuild the landing site into www/ (gitignored — pull never
#       updates it, so it must be rebuilt every run) ─────────────────
step "landing build"
(
  # Non-interactive shells lack node/pnpm on PATH — source nvm + pnpm.
  export NVM_DIR="$HOME/.nvm"
  [ -s "$NVM_DIR/nvm.sh" ] && . "$NVM_DIR/nvm.sh"
  export PNPM_HOME="$HOME/.local/share/pnpm"
  export PATH="$PNPM_HOME/bin:$PATH"
  command -v pnpm >/dev/null 2>&1 || {
    echo "pnpm not on PATH (looked in nvm=$NVM_DIR, pnpm=$PNPM_HOME/bin)." >&2
    echo "Install pnpm + node (never npm) and re-run." >&2
    exit 1
  }
  cd landing
  set -a; . ../.env; set +a
  pnpm run build
)

# ── 5. apply via docker compose ─────────────────────────────────────
if [ "$HARD" -eq 1 ]; then
  step "docker compose down + up  (--hard, full restart)"
  docker compose down --remove-orphans
  docker compose up -d --build
else
  step "docker compose up -d --build"
  docker compose up -d --build

  # Rolling `up -d` does NOT reload changed bind-mounted configs/mods, so restart
  # only the services whose inputs actually changed since the snapshot above.
  restart=()
  [ "$(cfg_hash drasl/config/config.toml)" != "$before_drasl" ] && restart+=(drasl)
  [ "$(cfg_hash nmsr/config.toml)" != "$before_nmsr" ] && restart+=(nmsr)
  [ "$(mods_hash)" != "$before_mods" ] && restart+=(minecraft)  # mods ⇒ MC restart (downtime, required)
  if [ "${#restart[@]}" -gt 0 ]; then
    step "restart changed services: ${restart[*]}"
    docker compose restart "${restart[@]}"
  else
    echo "  (no config/mod changes — nothing to restart)"
  fi
fi

# ── 6. status summary ───────────────────────────────────────────────
step "docker compose ps"
docker compose ps

printf '\n\033[1;32m✓ update-all complete\033[0m\n'