#!/usr/bin/env bash

# ============================================
# Lifecycle
# ============================================

function cmd::unblock::on_load() {
  flag::register --name
  flag::register --type
  flag::register --force
  flag::register --quiet
  flag::register --ip
  flag::register --port
  flag::register --proto
  flag::register --subnet
  flag::register --all

  # System - NET Services
  flag::register --service
}

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

function cmd::unblock::help() {
  cat <<EOF
Usage: wgctl unblock --name <name> [options]

Remove block rules for a client.

Options:
  --name <name>            Client name (e.g. phone-nuno)
  --type <type>            Device type (optional, combines with --name)
  --ip <ip>                Unblock specific IP (repeatable)
  --subnet <cidr>          Unblock specific subnet (repeatable)
  --port <ip:port:proto>   Unblock specific port (repeatable)
  --all                    Remove all block rules for this client
  --force                  Skip confirmation prompt
  --quiet                  Suppress output (used by group unblock)

Examples:
  wgctl unblock --name phone-nuno
  wgctl unblock --name nuno --type phone
  wgctl unblock --name phone-nuno --ip 10.0.0.210
  wgctl unban --name phone-nuno
EOF
}

# ============================================
# Unblock Run
# ============================================

function cmd::unblock::run() {
  local name=""
  local type=""
  local ips=()
  local subnets=()
  local ports=()
  local services=()
  local all=false
  local quiet=false
  
  while [[ $# -gt 0 ]]; do
    case "$1" in
      --name)   name="$2";          shift 2 ;;
      --type)   type="$2";          shift 2 ;;
      --ip)     ips+=("$2");        shift 2 ;;
      --force)  force=true;         shift   ;;
      --quiet)  quiet=true;         shift   ;;
      --subnet) subnets+=("$2");    shift 2 ;;
      --port)   ports+=("$2");      shift 2 ;;
      --service) services+=("$2");  shift 2 ;;
      --all)    all=true;           shift   ;;
      --help)   cmd::unblock::help; return  ;;
      *)
        log::error "Unknown flag: $1"
        cmd::unblock::help
        return 1
        ;;
    esac
  done

  if [[ -z "$name" ]]; then
    log::error "Missing required flag: --name"
    cmd::unblock::help
    return 1
  fi

  name=$(peers::resolve_and_require "$name" "$type") || return 1

  # Check if actually blocked
  if ! peers::is_blocked "$name" && ! block::has_file "$name"; then
    log::wg_warning "Client is not blocked: ${name}"
    return 0
  fi

  # Default to full unblock if no specific flags given
  if [[ ${#ips[@]} -eq 0 && ${#subnets[@]} -eq 0 && ${#ports[@]} -eq 0 && ${#services[@]} -eq 0 ]]; then
    all=true
  fi

  local client_ip
  client_ip=$(peers::get_ip "$name") || return 1

  # $quiet || log::section "Unblocking client: ${name} (${client_ip})"

  if $all; then
    cmd::unblock::_unblock_all "$name" "$client_ip" "$quiet"
    return 0
  fi

  # Unblock specific IPs
  for ip in "${ips[@]}"; do
    fw::unblock_ip "$client_ip" "$ip"
    block::remove_rule "$name" "ip" "$ip"
  $quiet || log::wg_success "${ip} has been unblocked for ${name}"
  done

  # Unblock specific subnets
  for subnet in "${subnets[@]}"; do
    fw::unblock_subnet "$client_ip" "$subnet"
    block::remove_rule "$name" "subnet" "$subnet"
  $quiet || log::wg_success "${subnet} has been unblocked for ${name}"
  done

  # Unblock specific ports
  for entry in "${ports[@]}"; do
    local target port proto
    IFS=":" read -r target port proto <<< "$entry"
    proto="${proto:-tcp}"
    fw::unblock_port "$client_ip" "$target" "$port" "$proto"
    block::remove_rule "$name" "port" "$b_target" "$b_port" "$b_proto"
    $quiet || log::wg_success "${client_ip}:${b_port}:${b_proto:-tcp} has been unblocked for ${name}"
  done

  # Unblock services
  for svc in "${services[@]}"; do
    local resolved_lines=()
    mapfile -t resolved_lines < <(net::resolve "$svc" 2>/dev/null)
    if [[ ${#resolved_lines[@]} -eq 0 ]]; then
      log::error "Service not found: ${svc}"
      return 1
    fi

    # Check if actually blocked
    local is_blocked=false
    for resolved in "${resolved_lines[@]}"; do
      if [[ "$resolved" == *:*:* ]]; then
        local b_ip b_port b_proto
        IFS=":" read -r b_ip b_port b_proto <<< "$resolved"
        fw::has_block_rule "$client_ip" "$b_ip" "$b_port" "$b_proto" 2>/dev/null && \
          { is_blocked=true; break; }
      else
        fw::has_block_rule "$client_ip" "$resolved" 2>/dev/null && \
          { is_blocked=true; break; }
      fi
    done

    if ! $is_blocked; then
      $quiet || log::wg_warning "${svc} is not blocked for ${name}"
      continue
    fi

    for resolved in "${resolved_lines[@]}"; do
      if [[ "$resolved" == *:*:* ]]; then
        local b_ip b_port b_proto
        IFS=":" read -r b_ip b_port b_proto <<< "$resolved"
        fw::unblock_port "$client_ip" "$b_ip" "$b_port" "$b_proto"
        block::remove_rule "$name" "port" "$b_ip" "$b_port" "$b_proto"
      else
        fw::unblock_ip "$client_ip" "$resolved"
        block::remove_rule "$name" "ip" "$resolved"
      fi
    done

    $quiet || log::wg_success "${svc} has been unblocked for ${name}"
  done

  # Clean up block file if now empty
  block::cleanup "$name"

  return 0
}

function cmd::unblock::_unblock_all() {
  local name="${1:?}" client_ip="${2:?}" quiet="${3:-false}"

  # Direct unblock overrides everything — clear all block state
  block::set_direct "$name" "$client_ip" "false"

  # Force full unblock regardless of group blocks
  # (direct unblock = admin override)
  block::restore_peer "$name" "$client_ip"
  block::remove_file "$name"

  local rule
  rule=$(peers::get_meta "$name" "rule")
  
  [[ -n "$rule" ]] && rule::exists "$rule" && \
    rule::apply "$rule" "$client_ip" "$name"

  local groups
  groups=$(block::get_groups "$name")
  if [[ -n "$groups" ]]; then
    log::wg_warning "${name} was blocked by group(s): ${groups} — unblocking anyway"
  fi

  $quiet || log::wg_success "${name} has been unblocked."

  return 0
}