#!/usr/bin/env bash

# ============================================
# Help
# ============================================

function cmd::service::help() {
  cat <<EOF
Usage: wgctl <subcommand>

Manage the WireGuard service.

Subcommands:
  start,   up       Start WireGuard
  stop,    down     Stop WireGuard
  restart, reload   Restart WireGuard
  status,  stat     Show WireGuard status
  logs,    log      Show WireGuard logs
  enable            Enable WireGuard on boot
  disable           Disable WireGuard on boot

Examples:
  wgctl start
  wgctl logs
  wgctl status
EOF
}

# ============================================
# Run
# ============================================

function cmd::service::run() {
  local subcmd="${1:-help}"
  shift || true

  case "$subcmd" in
    start)   cmd::service::start   ;;
    stop)    cmd::service::stop    ;;
    restart) cmd::service::restart ;;
    reload)  cmd::service::reload  ;;
    status)  cmd::service::status  ;;
    logs)    cmd::service::logs    ;;
    enable)  cmd::service::enable  ;;
    disable) cmd::service::disable ;;
    help)    cmd::service::help    ;;
    *)
      log::error "Unknown subcommand: '${subcmd}'"
      cmd::service::help
      return 1
      ;;
  esac
}

# ============================================
# Subcommands
# ============================================

function cmd::service::start() {
  log::wg_start "Starting WireGuard..."
  systemctl start "wg-quick@$(config::interface)"

  block::restore_all
  rule::restore_all

  cmd::service::_auto_rotate_logs

  log::wg_success "WireGuard started"
}

function cmd::service::stop() {
  log::wg_stop "Stopping WireGuard..."
  systemctl stop "wg-quick@$(config::interface)"
  log::wg_success "WireGuard stopped"
}

function cmd::service::restart() {
  log::wg_start "Restarting WireGuard..."

  # Flush firewall rules before restart so restore starts clean
  fw::flush_all

  systemctl restart "wg-quick@$(config::interface)"
  
  block::restore_all
  rule::restore_all

  cmd::service::_auto_rotate_logs

  log::wg_success "WireGuard restarted"
}

function cmd::service::reload() {
  log::wg_start "Reloading WireGuard config..."

  peers::reload
  block::restore_all
  rule::restore_all

  log::wg_success "WireGuard config reloaded"
}

function cmd::service::status() {
  log::section "WireGuard Status"

  echo ""
  systemctl status "wg-quick@$(config::interface)" --no-pager
  echo ""

  log::section "Active Peers"
  wg show "$(config::interface)"
}

function cmd::service::logs() {
  log::section "WireGuard Logs"
  journalctl -u "wg-quick@$(config::interface)" -f --no-pager
}

function cmd::service::_auto_rotate_logs() {
  local max_size=10485760  # 10MB
  local fw_size wg_size
  fw_size=$(stat -c%s "$(ctx::fw_events_log)" 2>/dev/null || echo 0)
  wg_size=$(stat -c%s "$(ctx::events_log)"    2>/dev/null || echo 0)

  if (( fw_size > max_size || wg_size > max_size )); then
    log::wg_warning "Log files exceed 10MB, auto-rotating (keeping 7 days)..."
    cmd::logs::rotate --days 7 --force
  fi
}

function cmd::service::enable() {
  systemctl enable "wg-quick@$(config::interface)"
  log::wg_success "WireGuard enabled on boot"
}

function cmd::service::disable() {
  systemctl disable "wg-quick@$(config::interface)"
  log::wg_success "WireGuard disabled on boot"
}