#!/usr/bin/env bash

core_name_bds() {
  echo "Bedrock Dedicated Server"
}

core_default_port_bds() {
  echo "19132"
}

core_protocol_bds() {
  echo "udp"
}

core_runtime_bds() {
  echo "native"
}

core_validate_bds() {
  if [[ -z "${MC_VERSION:-}" ]]; then
    MC_VERSION="latest"
  fi
}

bds_resolve_latest_download_url() {
  local page
  local url

  page="$(http_get "https://www.minecraft.net/en-us/download/server/bedrock")"
  if [[ -z "$page" ]]; then
    fail "$(t no_stable_build "Bedrock Dedicated Server" "latest")"
  fi

  url="$(printf '%s\n' "$page" | grep -oE "https://minecraft\\.azureedge\\.net/bin-linux/bedrock-server-[^\" ]+\\.zip" | head -n 1)"
  if [[ -z "$url" ]]; then
    fail "$(t no_stable_build "Bedrock Dedicated Server" "latest")"
  fi

  echo "$url"
}

bds_resolve_download_url() {
  local requested="${1:-latest}"

  if [[ "$requested" == "latest" ]]; then
    bds_resolve_latest_download_url
    return
  fi

  if [[ "$requested" == http* ]]; then
    echo "$requested"
    return
  fi

  echo "https://minecraft.azureedge.net/bin-linux/bedrock-server-${requested}.zip"
}

bds_resolve_version_from_url() {
  local url="$1"
  local requested="${2:-latest}"
  local file

  file="${url##*/}"
  file="${file#bedrock-server-}"
  file="${file%.zip*}"
  file="${file%%\?*}"

  if [[ -z "$file" || "$file" == "$requested" ]]; then
    echo "$requested"
    return
  fi

  echo "$file"
}

bds_render_start_script() {
  local dir="$SERVER_DIR"
  emit_step "core_render" "bds start script"
  run_cmd bash -c "cat > '$dir/start.sh' <<EOF
#!/usr/bin/env bash
set -e
cd \"\$(dirname \"\$0\")\"
export LD_LIBRARY_PATH=.:\$LD_LIBRARY_PATH
exec ./bedrock_server
EOF"
  run_cmd chmod +x "$dir/start.sh"
  emit_step "chmod_start_script" "$dir/start.sh"
}

core_install_bds() {
  info "$(t core_install "$(core_name_bds)")"
  emit_step "core_install" "$(core_name_bds)"

  local requested_version="${MC_VERSION:-latest}"
  local download_url
  local version
  local archive="$SERVER_DIR/.bds-package.zip"

  download_url="$(bds_resolve_download_url "$requested_version")"
  version="$(bds_resolve_version_from_url "$download_url" "$requested_version")"

  emit_step "core_resolve_download" "$version"
  emit_step "core_fetch" "$download_url"

  if [[ -f "$SERVER_DIR/.bds-version" ]]; then
    local existing_version
    existing_version="$(cat "$SERVER_DIR/.bds-version" 2>/dev/null || true)"
    if [[ "$UPDATE_MODE" == "no" && -n "$existing_version" && "$existing_version" == "$version" && -f "$SERVER_DIR/bedrock_server" ]]; then
      info "BDS already at requested version ${version}. Skipping binary download."
      run_cmd chmod +x "$SERVER_DIR/bedrock_server"
      bds_render_start_script
      return
    fi
  fi

  run_cmd rm -f "$archive"
  download_as_user "$download_url" "$archive"
  emit_step "core_fetch" "Bedrock server archive"
  run_cmd unzip -o -q "$archive" -d "$SERVER_DIR"
  run_cmd rm -f "$archive"

  if [[ ! -f "$SERVER_DIR/bedrock_server" ]]; then
    fail "bedrock_server not found after extraction"
  fi

  run_cmd chmod +x "$SERVER_DIR/bedrock_server"
  bds_render_start_script
  run_cmd bash -lc "printf '%s\n' '$version' > '$SERVER_DIR/.bds-version'"
  emit_step "core_configure" "BDS version ${version}"
}

core_post_install_bds() {
  emit_step "core_post" "BDS"
  run_cmd bash -lc "chown -R ${SERVER_USER}:${SERVER_USER} '$SERVER_DIR'"
  emit_step "core_chown" "BDS"
  open_firewall_port "$SERVER_PORT" "udp"
  emit_step "core_service" "BDS"
  create_service "$CORE" "$SERVER_DIR" "$SERVICE_MODE" "$SERVER_DIR/start.sh"
  start_service
}

core_update_bds() {
  info "$(t core_update "$(core_name_bds)")"
  emit_step "core_update" "$(core_name_bds)"

  backup_file "$SERVER_DIR/bedrock_server"
  backup_file "$SERVER_DIR/start.sh"
  backup_file "$SERVER_DIR/.bds-version"

  core_install_bds
  emit_step "core_update_done" "BDS"
}