#!/usr/bin/env bash
set -euo pipefail

APPFACTORY_ROOT="/opt/appfactory"
DB_FILE="$APPFACTORY_ROOT/data/appfactory/appfactory.db"
WORKSPACE_DIR="$APPFACTORY_ROOT/workspace"
DELETE_SCRIPT="$WORKSPACE_DIR/appfactory-tools/scripts/delete-app.sh"

# Výchozí režim pouze vypisuje kandidáty.
DRY_RUN="${DRY_RUN:-1}"

# Čerstvé adresáře nemažeme. Selhávající provisioning může ještě dobíhat.
MIN_AGE_HOURS="${MIN_AGE_HOURS:-24}"
MIN_AGE_MINUTES=$((MIN_AGE_HOURS * 60))

CORE_SERVICES=(
  appfactory-tools
  appfactory-portal
  appfactory-worker
  appfactory-monitor
  appfactory-webhook
  appfactory-infrastructure
)

log() {
  printf '%s %s\n' "$(date '+%Y-%m-%d %H:%M:%S')" "$*"
}

is_core_service() {
  local candidate="$1"
  local core

  for core in "${CORE_SERVICES[@]}"; do
    if [ "$candidate" = "$core" ]; then
      return 0
    fi
  done

  return 1
}

if [ ! -f "$DB_FILE" ]; then
  log "ERROR: Databáze neexistuje: $DB_FILE"
  exit 1
fi

if [ ! -x "$DELETE_SCRIPT" ]; then
  log "ERROR: Mazací skript není spustitelný: $DELETE_SCRIPT"
  exit 1
fi

# Bez důvěryhodného zdroje pravdy nic nemažeme.
if ! sqlite3 "$DB_FILE" \
  "SELECT 1 FROM sqlite_master WHERE type='table' AND name='apps';" |
  grep -qx 1; then
  log "ERROR: Tabulka apps nebyla nalezena. Automatické mazání zastaveno."
  exit 1
fi

mapfile -t REGISTERED_APPS < <(
  sqlite3 "$DB_FILE" \
    "SELECT id FROM apps WHERE id IS NOT NULL AND trim(id) <> '' ORDER BY id;"
)

is_registered_app() {
  local candidate="$1"
  local registered

  for registered in "${REGISTERED_APPS[@]}"; do
    if [ "$candidate" = "$registered" ]; then
      return 0
    fi
  done

  return 1
}

found=0

while IFS= read -r app_dir; do
  app_id="$(basename "$app_dir")"

  if is_core_service "$app_id"; then
    continue
  fi

  if is_registered_app "$app_id"; then
    continue
  fi

  # Nedotýkat se čerstvého workspace.
  if ! find "$app_dir" -maxdepth 0 -mmin "+$MIN_AGE_MINUTES" |
       grep -q .; then
    continue
  fi

  found=$((found + 1))
  log "ORPHAN candidate: $app_id"

  if [ "$DRY_RUN" = "1" ]; then
    log "DRY-RUN: byl by spuštěn delete-app.sh $app_id"
    continue
  fi

  log "Deleting orphan: $app_id"

  if "$DELETE_SCRIPT" "$app_id"; then
    log "Deleted: $app_id"
  else
    log "ERROR: Mazání selhalo: $app_id"
  fi
done < <(
  find "$WORKSPACE_DIR" \
    -mindepth 1 \
    -maxdepth 1 \
    -type d \
    -print |
  sort
)

log "Finished. Orphan candidates: $found; DRY_RUN=$DRY_RUN"