#!/bin/bash
set -e
CONTAINER_NAME="dashcaddy-api"
IMAGE="dashcaddy-dashcaddy-api:latest"
DATA_DIR="/opt/dashcaddy/dashcaddy-api/data"
CADDYFILE="/etc/caddy/Caddyfile"
ASSETS_DIR="/var/www/dashcaddy-status/assets"
UPDATES_DIR="/opt/dashcaddy/updates"
BACKUPS_DIR="/opt/dashcaddy/backups"
HOST_IP="172.17.0.1"
# Local Technitium (binds 0.0.0.0:53) resolves *.sami + recurses for docker subnet
# external fallback. Without this the container only has 8.8.8.8 and every
# *.sami health-check probe fails with ENOTFOUND (uptime bars stay empty).
DNS_PRIMARY="100.121.150.22"   # Technitium (Tailscale IP) — resolves *.sami
DNS_FALLBACK="8.8.8.8"

# --- One-time migration from Docker image layer to bind mount --------------
# DC-039 follow-up. Before v1.14.10, certain modules (audit-logger, license-
# keygen, credential-manager) defaulted their files to /app/src/* via
# path.join(__dirname, 'foo.json'). Those writes landed in the Docker image
# layer and VANISHED on every container recreate. This step scans for any
# non-empty zombie files left over from a previous image (where /opt/dashcaddy/
# previously used /opt/dashcaddy/dashcaddy-api/src/... as the path root) and
# copies their contents into the bind-mounted data dir ONCE.
#
# Idempotent: bails out if the migration sentinel file already exists.
# Designed to be a no-op on every fresh install.
MIGRATION_SENTINEL="${DATA_DIR}/.migrated-from-image-layer"
IMAGE_LAYER_ZOMBIES=(
  "/opt/dashcaddy/dashcaddy-api/src/security/audit-log.json"
  "/opt/dashcaddy/dashcaddy-api/src/security/.encryption-key"
  "/opt/dashcaddy/dashcaddy-api/src/security/.encryption-key.bak"
  "/opt/dashcaddy/dashcaddy-api/src/utils/error.log"
  "/opt/dashcaddy/dashcaddy-api/src/managers/.license-secret"
  "/opt/dashcaddy/dashcaddy-api/src/managers/.license-counter"
)
# Note: set -e is active at top of script. Each per-file step uses an
# explicit `|| true` (or guarded `if`) so a single unreadable zombie file
# can't take down the whole container. The sentinel write at the end is
# outside any conditional so it always runs once.
run_image_layer_migration() {
  if [ -f "${MIGRATION_SENTINEL}" ]; then
    return 0
  fi
  mkdir -p "${DATA_DIR}" || { echo "[start.sh] [migration] mkdir failed: ${DATA_DIR}"; return 0; }
  local migrated=0
  for src in "${IMAGE_LAYER_ZOMBIES[@]}"; do
    if [ -f "${src}" ] && [ -s "${src}" ]; then
      local dest_name dest
      dest_name="$(basename "${src}")"
      dest="${DATA_DIR}/migrated-${dest_name}"
      if [ ! -f "${dest}" ]; then
        echo "[start.sh] [migration] Recovering image-layer file: ${src} -> ${dest}"
        if cp -a "${src}" "${dest}" 2>/dev/null; then
          migrated=$((migrated + 1))
        else
          echo "[start.sh] [migration] WARN: failed to copy ${src} (continuing)"
        fi
      fi
    fi
  done
  if [ "$migrated" -gt 0 ]; then
    echo "[start.sh] [migration] Recovered ${migrated} file(s) from image layer."
    echo "[start.sh] [migration] Review files prefixed 'migrated-' in ${DATA_DIR} and merge or delete."
  fi
  # Sentinel write MUST run regardless of any per-file failure above.
  date -u +%Y-%m-%dT%H:%M:%SZ > "${MIGRATION_SENTINEL}" 2>/dev/null || echo "1" > "${MIGRATION_SENTINEL}"
}
run_image_layer_migration

# --- /etc/hosts overrides for the container ---------------------------------
# The base image (node:20-alpine) has no entries for *.sami. We must inject
# them via --add-host so health checks inside the container can resolve LAN
# and Tailscale IPs to the right destinations.
#
# IMPORTANT: Do NOT add `git.sami:100.81.59.99` (DNS3). DNS3 does not serve
# HTTPS on 443 — it only serves Gitea on :3030. Setting git.sami → DNS3 in
# the container would make health checks bypass Caddy and hit a closed port.
# Let Caddy (on DNS2:443) handle git.sami and route to DNS3:3030 internally.
#
# Layout:
#   dns3.sami / gitea → DNS3 (Tailscale IP, used by tools inside the container
#                        that need to talk to Gitea directly, e.g. backups)
#   dns3-wan.sami     → DNS3 Contabo WAN fallback
#   dns2.sami         → DNS2 (this host) — for cross-service references
#   dns1.sami         → DNS1 (SAMI-CLOUD-U32)
#   dc-contabo-de     → DashCaddy Contabo test instance
#   git.dashcaddy.net → DashCaddy upstream git
#   ca.sami           → local CA (DN2 + DN3 both have their own)
ADD_HOST_FLAGS=(
  # host.docker.internal → host bridge IP (Docker host-gateway). The caddy
  # upstream watcher probes Caddy site upstreams from INSIDE this container;
  # `reverse_proxy localhost:PORT` in a site file means the HOST's loopback,
  # so the watcher remaps loopback probe targets to this name (see
  # dashcaddy-api/src/monitoring/caddy-upstream-watcher.js). Without this
  # entry the probes would hit the container's own loopback and report every
  # host-side upstream as dead.
  --add-host=host.docker.internal:host-gateway
  --add-host=dns3.sami:100.81.59.99
  --add-host=gitea:100.81.59.99
  --add-host=dns3-wan.sami:74.208.167.19
  --add-host=dns2.sami:100.121.150.22
  --add-host=dns1.sami:100.71.97.12
  --add-host=dc-contabo-de:100.98.123.59
  --add-host=git.dashcaddy.net:100.98.123.59
  # ca.sami resolves via DNS to 100.121.150.22 (Caddy on DNS2). Don't pin
  # to 127.0.0.1 — nothing listens on 443 inside the container, so the
  # health checker would fail with ECONNREFUSED. The CA itself is a
  # public-facing service that goes through Caddy just like every other *.sami.
)

# Always recreate to ensure env vars are correct (CONFIG_FILE defaults to /etc/dashcaddy/ which doesn't exist)
if docker ps -a --format "{{.Names}}" | grep -q "^${CONTAINER_NAME}$"; then
  echo "[start.sh] Recreating container to apply correct env vars..."
  docker rm -f ${CONTAINER_NAME}
fi

# Tailscale CLI + control socket — lets the container invoke
# `tailscale status --json` to populate /api/v1/tailscale/status etc.
# The binary is statically linked (Go), so the bind-mount works under
# the container's Alpine libc without any library forwarding.
# Both mounts are read-only: `tailscale status --json` is a read query
# that the local tailscaled handles; we never need to mutate state
# from inside the container.
echo "[start.sh] Creating container with full config..."

# Sync the freshly-built dashboard bundle into the static directory Caddy
# serves. The Docker image bakes dist/ from the source tree at build time,
# but DNS2 also serves /var/www/dashcaddy-status/dist/ (the original
# Windows installer mirror path). If we don't sync after every build, the
# served bundle keeps the OLD hash while the API responds with new code,
# which shows up in the dashboard as "version unavailable" + "no data"
# widgets because the new API surface doesn't match the old widget code.
# This step is idempotent and ~50ms — always safe to run.
echo "[start.sh] Syncing dashboard bundle into static dir..."
mkdir -p /var/www/dashcaddy-status/dist
if [ -d /opt/dashcaddy/status/dist ]; then
  cp /opt/dashcaddy/status/dist/*.js /var/www/dashcaddy-status/dist/ 2>/dev/null || true
  cp /opt/dashcaddy/status/sw.js /var/www/dashcaddy-status/ 2>/dev/null || true
  cp /opt/dashcaddy/status/index.html /var/www/dashcaddy-status/ 2>/dev/null || true
  echo "[start.sh] Bundle synced ($(ls /opt/dashcaddy/status/dist/*.js 2>/dev/null | wc -l) bundle files + sw.js + index.html)."
else
  echo "[start.sh] WARN: /opt/dashcaddy/status/dist missing — skipping sync (frontend will be stale)."
fi

docker run -d --restart unless-stopped --name ${CONTAINER_NAME} \
  --memory=1g --memory-swap=2g --cpus=2 \
  --add-host=get.dashcaddy.net:194.233.88.206 \
  --add-host=get2.dashcaddy.net:194.233.88.206 \
  --dns ${DNS_PRIMARY} \
  --dns ${DNS_FALLBACK} \
  "${ADD_HOST_FLAGS[@]}" \
  -p 127.0.0.1:3001:3001 \
  -v ${DATA_DIR}:/app/data \
  -v ${BACKUPS_DIR}:/app/backups \
  -v ${CADDYFILE}:/caddyfile \
  -v /etc/caddy/sites:/etc/caddy/sites:ro \
  -v /var/run/docker.sock:/var/run/docker.sock \
  -v ${ASSETS_DIR}:/app/assets \
  -v ${UPDATES_DIR}:/app/updates \
  -v /opt/sami-files/logs:/opt/sami-files/logs:ro \
  -v /usr/bin/tailscale:/usr/bin/tailscale:ro \
  -v /var/run/tailscale:/var/run/tailscale:ro \
  -v /etc/ssl/sami-ca:/etc/ssl/sami-ca:ro \
  -e NODE_ENV=production \
  -e SERVICES_FILE=/app/data/services.json \
  -e CONFIG_FILE=/app/data/config.json \
  -e BACKUP_DIR=/app/backups \
  -e DNS_CREDENTIALS_FILE=/app/data/dns-credentials.json \
  -e CREDENTIALS_FILE=/app/data/credentials.json \
  -e ENCRYPTION_KEY_FILE=/app/data/.encryption-key \
  -e HEALTH_HISTORY_FILE=/app/data/health-history.json \
  -e HEALTH_CONFIG_FILE=/app/data/health-config.json \
  -e CADDYFILE_PATH=/caddyfile \
  -e CADDY_ADMIN_URL=http://${HOST_IP}:2019 \
  -e ASSETS_DIR=/app/assets \
  -e DASHCADDY_API_SOURCE_DIR=/opt/dashcaddy/dashcaddy-api \
  -e DASHCADDY_UPDATE_ENABLED=false \
  -e CA_CERT_PATH=/etc/ssl/sami-ca/root.crt \
  ${IMAGE}