#!/bin/bash
# deploy-from-artifact.sh -- Server-side Deploy nach GitHub-Actions-Artifact-Upload.
#
# Wird via SSH von .github/workflows/deploy-staging.yml aufgerufen.
# Erwartet: /srv/rebreak/backend/.output-incoming.tar.gz (vom GA-Runner via scp gepusht).
#
# Diff zu scripts/deploy.sh:
#   - KEIN pnpm build hier (das macht der GA-Runner mit 7 GB RAM)
#   - KEIN pnpm install --frozen-lockfile fuer Build-Deps -- nur Runtime-Deps via prod-flag
#   - Migration-Detection bleibt (Pattern aus deploy.sh)
#   - Atomic .output-staging-Replacement bleibt
#
# Failure-Mode: Bei Migration-Fehler kein pm2-restart (Daten-Konsistenz-Schutz).

set -euo pipefail

REPO_ROOT="/srv/rebreak"
APP_DIR="${REPO_ROOT}/backend"
ARTIFACT="${APP_DIR}/.output-incoming.tar.gz"
PM2_BIN="/root/.nvm/versions/node/v24.11.1/bin/pm2"
PNPM_BIN="/root/.nvm/versions/node/v24.11.1/bin/pnpm"

log() { echo "[deploy-artifact] $(date '+%H:%M:%S') $*"; }
log_err() { echo "[deploy-artifact:err] $(date '+%H:%M:%S') $*" >&2; }

log "=== Rebreak Deploy-from-Artifact gestartet ==="

export PATH="/root/.nvm/versions/node/v24.11.1/bin:$PATH"

# 0. Sanity-Check Artifact
[[ -f "$ARTIFACT" ]] || { log_err "Artifact $ARTIFACT fehlt -- abort"; exit 1; }

# 1. Git pull (fuer scripts/-Updates + prisma/migrations + .last-deployed-sha)
log "Step 1: git pull..."
cd "${REPO_ROOT}"
git fetch origin main
git reset --hard origin/main
log "Git updated to $(git rev-parse --short HEAD)"

# 2. Migration-Detection (1:1 aus scripts/deploy.sh uebernommen)
log "Step 2: Migration-Check..."
PREV_SHA=$(cat "${REPO_ROOT}/.last-deployed-sha" 2>/dev/null || echo "")
CUR_SHA=$(git -C "${REPO_ROOT}" rev-parse HEAD)

run_migration=false
if [[ -z "$PREV_SHA" ]]; then
  log "Kein .last-deployed-sha gefunden -- first-deploy: Migration sicherheitshalber ausfuehren"
  run_migration=true
elif ! git -C "${REPO_ROOT}" diff --quiet "$PREV_SHA"..HEAD -- backend/prisma/migrations/ backend/prisma/schema.prisma; then
  log "Migration-Changes detected zwischen ${PREV_SHA} und ${CUR_SHA}"
  run_migration=true
else
  log "Keine Migration-Changes seit ${PREV_SHA} -- skip migrate deploy"
fi

if $run_migration; then
  log "Running prisma migrate deploy..."
  cd "${APP_DIR}"

  source /etc/environment
  if [[ -z "${INFISICAL_CLIENT_ID:-}" || -z "${INFISICAL_CLIENT_SECRET:-}" ]]; then
    log_err "INFISICAL_CLIENT_ID / INFISICAL_CLIENT_SECRET fehlt -- Migration abgebrochen"
    exit 1
  fi

  INFISICAL_TOKEN=$(infisical login \
    --method=universal-auth \
    --client-id="${INFISICAL_CLIENT_ID}" \
    --client-secret="${INFISICAL_CLIENT_SECRET}" \
    --silent --plain 2>/dev/null)

  [[ -z "$INFISICAL_TOKEN" ]] && { log_err "Infisical login fehlgeschlagen"; exit 1; }

  infisical run \
    --projectId="${INFISICAL_PROJECT_ID:-14b11b35-ef59-4b8a-a16b-398f0cc3ad93}" \
    --env=staging \
    --token="$INFISICAL_TOKEN" \
    -- bash -c '
      set -e
      export DATABASE_URL="${DATABASE_URL:-${NUXT_DATABASE_URL:-}}"
      if [[ -z "$DATABASE_URL" ]]; then
        echo "[deploy-artifact:err] DATABASE_URL nicht in Infisical-staging" >&2
        exit 1
      fi
      "'"${PNPM_BIN}"'" prisma migrate deploy --schema prisma/schema.prisma
    ' 2>&1 || {
    log_err "Migration-Deploy fehlgeschlagen -- pm2-restart ABGEBROCHEN"
    exit 1
  }
  log "Migration done"
fi

# 3. Runtime-Deps installieren (nur falls package.json/lockfile changed)
#    Prisma-Client ist schon im Artifact baked-in via `prisma generate` auf dem Runner,
#    aber Runtime-Module (z.B. @prisma/client native binaries) muessen lokal sein.
log "Step 3: pnpm install (runtime-deps)..."
cd "${REPO_ROOT}"
CI=true "${PNPM_BIN}" install --frozen-lockfile 2>&1 || {
  log_err "frozen-lockfile fehlgeschlagen, fallback ohne frozen..."
  CI=true "${PNPM_BIN}" install --no-frozen-lockfile 2>&1
}
log "pnpm install done"

# 3b. imap-idle Runtime-Deps installieren (imapflow + pg, standalone package.json)
IDLE_DIR="${APP_DIR}/imap-idle"
if [[ -d "$IDLE_DIR" && -f "$IDLE_DIR/package.json" ]]; then
  log "Step 3b: npm install (imap-idle runtime-deps)..."
  cd "$IDLE_DIR"
  npm install --production --prefer-offline 2>&1
  # scp preserviert Permissions nicht immer -- explizit setzen
  [[ -f "$IDLE_DIR/start-idle-staging.sh" ]] && chmod +x "$IDLE_DIR/start-idle-staging.sh"
  log "imap-idle npm install done"
else
  log "Step 3b: imap-idle-Verzeichnis nicht gefunden -- skip (wird via GH-Actions deployed)"
fi

# 4. Artifact extrahieren -- atomisches mv (gleicher Pattern wie deploy.sh)
log "Step 4: Artifact extrahieren..."
cd "${APP_DIR}"
rm -rf .output-staging-new
mkdir -p .output-staging-new
tar xzf "$ARTIFACT" -C .output-staging-new

# Sanity-Check: server/index.mjs muss drin sein
[[ -f .output-staging-new/server/index.mjs ]] || {
  log_err "Ungueltiges Artifact -- .output-staging-new/server/index.mjs fehlt"
  rm -rf .output-staging-new
  exit 1
}

rm -rf .output-staging
mv .output-staging-new .output-staging
rm -f "$ARTIFACT"
log ".output-staging aktualisiert"

# 5. pm2 restart (--update-env zieht neue Infisical-Secrets)
log "Step 5: pm2 restart rebreak-staging..."
"${PM2_BIN}" restart rebreak-staging --update-env 2>/dev/null || \
  "${PM2_BIN}" start "${REPO_ROOT}/ecosystem.config.js" --only rebreak-staging
log "rebreak-staging restarted"

# 6. Optional services (best-effort, Mo's Scope)
log "Step 6: Optional services restart..."
"${PM2_BIN}" restart rebreak-imap-staging 2>/dev/null || true
# rebreak-idle-staging: startOrReload (erster Deploy hat keinen laufenden Prozess)
"${PM2_BIN}" restart rebreak-idle-staging --update-env 2>/dev/null || \
  "${PM2_BIN}" start "${REPO_ROOT}/ecosystem.config.js" --only rebreak-idle-staging
"${PM2_BIN}" restart dns-rebreak-staging 2>/dev/null || true
"${PM2_BIN}" restart dns-rebreak 2>/dev/null || true

# 7. pm2 save
"${PM2_BIN}" save 2>/dev/null || true

# 8. Last-deployed-SHA persistieren
echo "${CUR_SHA}" > "${REPO_ROOT}/.last-deployed-sha"
log "Last-deployed-SHA gespeichert: ${CUR_SHA}"

log "=== Deploy erfolgreich: $(git -C ${REPO_ROOT} rev-parse --short HEAD) ==="