#!/usr/bin/env bash
set -euo pipefail
SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
SKILL_ROOT="$(dirname "$SCRIPT_DIR")"
source "$SCRIPT_DIR/_common.sh"

: "${MODE:=docker}"
: "${ADMIN_USER:=}"
: "${ADMIN_EMAIL:=}"
: "${DATA_DIR:=$HOME/gitea}"
: "${HTTP_PORT:=3000}"
: "${SSH_PORT:=2222}"

main() {
  log_info "Starting 00_preflight.sh"
  [[ -n "$ADMIN_USER" ]] || die "ADMIN_USER is required."
  [[ -n "$ADMIN_EMAIL" ]] || die "ADMIN_EMAIL is required."

  need curl
  need jq

  if [[ "$MODE" == "docker" ]]; then
    need docker
    need docker-compose || log_warn "docker-compose not found; will use 'docker compose' if available."
    docker version >/dev/null 2>&1 || die "Docker not working."
  elif [[ "$MODE" == "native" ]]; then
    need sudo
    need systemctl
  else
    die "MODE must be 'docker' or 'native' (got: $MODE)"
  fi

  mkdir -p "$SKILL_ROOT/outputs"
  mkdir -p "$SKILL_ROOT/outputs/backups"
  mkdir -p "$DATA_DIR"

  # lightweight port sanity
  if command -v ss >/dev/null 2>&1; then
    if ss -ltn | awk '{print $4}' | grep -q ":$HTTP_PORT$"; then
      log_warn "HTTP_PORT $HTTP_PORT already in use."
    fi
    if ss -ltn | awk '{print $4}' | grep -q ":$SSH_PORT$"; then
      log_warn "SSH_PORT $SSH_PORT already in use."
    fi
  fi

  log_info "Preflight OK."
}
main "$@"