#!/usr/bin/env bash
# Host (hernani@koopa): start Taler *apps inside* merchant/bank containers.
#
# Containers use CMD sleep infinity — podman start alone is not enough.
# Called by user systemd units after container-taler-*.service.
#
# Usage:
#   ensure-taler-apps.sh            # merchant + bank + helpers
#   ensure-taler-apps.sh merchant
#   ensure-taler-apps.sh bank
#   ensure-taler-apps.sh status
set -euo pipefail

MER_CTR="${MER_CTR:-taler-hacktivism}"
BANK_CTR="${BANK_CTR:-taler-hacktivism-bank}"
AUTO_LOOP_SECS="${AUTO_CONFIRM_LOOP_SECS:-2}"
WAIT_SECS="${WAIT_SECS:-90}"

log() { printf '%s %s\n' "$(date -Iseconds)" "$*"; }

# Oneshot container-*.service stays "active" after podman stop — always start here.
ensure_container() {
  local name="$1"
  if podman inspect -f '{{.State.Running}}' "$name" 2>/dev/null | grep -qx true; then
    return 0
  fi
  log "container $name: not running — podman start"
  podman start "$name" >/dev/null
}

wait_running() {
  local name="$1" i
  ensure_container "$name"
  for i in $(seq 1 "$WAIT_SECS"); do
    if podman inspect -f '{{.State.Running}}' "$name" 2>/dev/null | grep -qx true; then
      return 0
    fi
    sleep 1
  done
  log "ERROR: container $name not running after ${WAIT_SECS}s"
  return 1
}

ctr_has_proc() {
  local ctr="$1" pattern="$2"
  podman exec "$ctr" bash -lc "ps -eo args= | grep -F -- '$pattern' | grep -v grep" >/dev/null 2>&1
}

ensure_merchant_loopback_helper() {
  # Optional helper (loopback helper) — loopback :19097
  if podman exec "$MER_CTR" bash -lc "ss -tln 2>/dev/null | grep -q ':19097'" 2>/dev/null; then
    log "merchant: loopback :19097 already listening"
    return 0
  fi
  if ! podman exec "$MER_CTR" test -f /usr/local/bin/ui-unlock-api.py 2>/dev/null; then
    log "merchant: WARN helper missing"
    return 0
  fi
  log "merchant: start loopback helper :19097…"
  podman exec -u root -d "$MER_CTR" python3 /usr/local/bin/ui-unlock-api.py \
    || log "WARN: loopback helper start failed"
}

ensure_merchant() {
  wait_running "$MER_CTR"
  if ctr_has_proc "$MER_CTR" 'taler-merchant-httpd'; then
    log "merchant: httpd already up"
    ensure_merchant_loopback_helper
    return 0
  fi
  log "merchant: start base (postgres/nginx)…"
  podman exec -u root "$MER_CTR" \
    /root/start_base_services_for_taler.sh --no-shell
  log "merchant: start_merchant.sh…"
  podman exec -u root "$MER_CTR" \
    runuser -u taler-merchant-httpd -- /usr/local/bin/start_merchant.sh
  ensure_merchant_loopback_helper
  log "merchant: done"
}

ensure_bank() {
  wait_running "$BANK_CTR"
  if ! ctr_has_proc "$BANK_CTR" 'libeufin-bank'; then
    log "bank: start base + libeufin-bank…"
    podman exec -u root "$BANK_CTR" \
      /root/start_base_services_for_taler_bank.sh --no-shell --start-bank
  else
    log "bank: libeufin-bank already up"
  fi

  # Landing nginx on :9013 (separate from bank API :9012)
  if ! podman exec "$BANK_CTR" bash -lc "ss -tln 2>/dev/null | grep -q ':9013 '" 2>/dev/null; then
    log "bank: start landing nginx :9013…"
    podman exec -u root "$BANK_CTR" bash -lc '
      if [ -x /etc/init.d/nginx ]; then /etc/init.d/nginx start || true
      else nginx || true
      fi
    '
  else
    log "bank: nginx :9013 already listening"
  fi

  ensure_bank_helpers
  log "bank: done"
}

# Single auto-confirm loop + demo-withdraw API (idempotent)
ensure_bank_helpers() {
  local n
  # Collapse duplicate loops (common after manual restarts)
  n=$(podman exec "$BANK_CTR" bash -lc \
    "ps -eo pid=,args= | awk '/auto-confirm-withdrawals\\.sh --loop/ {print \$1}'" 2>/dev/null || true)
  set -- $n
  if [ "$#" -gt 1 ]; then
    log "bank: stop $(($# - 1)) extra auto-confirm pid(s)…"
    shift # keep first
    for pid in "$@"; do
      podman exec -u root "$BANK_CTR" kill "$pid" 2>/dev/null || true
    done
    sleep 0.3
  fi
  if [ "$#" -eq 0 ]; then
    log "bank: start auto-confirm --loop ${AUTO_LOOP_SECS}…"
    podman exec -u root -d "$BANK_CTR" \
      /usr/local/bin/auto-confirm-withdrawals.sh --loop "$AUTO_LOOP_SECS" \
      || log "WARN: auto-confirm start failed (script missing?)"
  else
    log "bank: auto-confirm already running"
  fi

  if podman exec "$BANK_CTR" test -f /usr/local/bin/demo-withdraw-api.py 2>/dev/null; then
    if ! ctr_has_proc "$BANK_CTR" 'demo-withdraw-api.py'; then
      log "bank: start demo-withdraw-api…"
      podman exec -u root -d "$BANK_CTR" \
        python3 /usr/local/bin/demo-withdraw-api.py \
        || log "WARN: demo-withdraw-api start failed"
    else
      log "bank: demo-withdraw-api already running"
    fi
  fi
}

status() {
  echo "=== containers ==="
  podman ps -a --filter name='taler-hacktivism' --format '{{.Names}} {{.Status}}'
  echo "=== merchant procs (sample) ==="
  podman exec "$MER_CTR" bash -lc "ps -eo args= | grep -E 'taler-merchant-httpd|postgres -D|nginx: master' | grep -v grep || true" 2>/dev/null || echo "(container down)"
  echo "=== bank procs (sample) ==="
  podman exec "$BANK_CTR" bash -lc "ps -eo args= | grep -E 'libeufin-bank|auto-confirm|demo-withdraw|nginx: master' | grep -v grep || true" 2>/dev/null || echo "(container down)"
  echo "=== public ==="
  for u in \
    https://taler.hacktivism.ch/config \
    https://taler.hacktivism.ch/intro/ \
    https://bank.hacktivism.ch/config \
    https://bank.hacktivism.ch/intro/
  do
    code=$(curl -sk -o /dev/null -w '%{http_code}' --connect-timeout 4 --max-redirs 0 "$u" || echo err)
    printf '  %s %s\n' "$code" "$u"
  done
}

cmd="${1:-all}"
case "$cmd" in
  all|"")
    ensure_merchant
    ensure_bank
    ;;
  merchant) ensure_merchant ;;
  bank) ensure_bank ;;
  helpers) ensure_bank_helpers ;;
  status) status ;;
  -h|--help)
    sed -n '2,16p' "$0"
    exit 0
    ;;
  *)
    echo "unknown: $cmd (all|merchant|bank|helpers|status)" >&2
    exit 2
    ;;
esac