/**
 * Which built-in agent tools touch the host workspace jail.
 * No Bare imports — unit-testable on Node.
 */

const HOST_WORKSPACE_TOOLS = [
  'read_file',
  'write_file',
  'search_replace',
  'grep',
  'list_dir',
  'run_terminal_cmd',
  'memory_search',
  'memory_get',
  'memory_write',
];

const HOST_WORKSPACE_SET = new Set(HOST_WORKSPACE_TOOLS);

const ALWAYS_RESERVED = ['image_gen', 'image_edit', 'image_to_video', 'deploy_app'];

const ALWAYS_BUILTIN_RESERVED = [
  'todo_write',
  'web_search',
  'web_fetch',
  'enter_plan_mode',
  'exit_plan_mode',
  'ask_user_question',
  'update_goal',
  'memory_write',
  'task',
  'send_subagent_message',
  'get_task_output',
  'wait_tasks',
  'kill_task',
  'search_tool',
  'use_tool',
];

function parseHostWorkspace(opts) {
  opts = opts || {};
  if (opts.hostWorkspace === false || opts.hostTools === false) return false;
  return true;
}

function filterBuiltinSchemas(schemas, opts) {
  opts = opts || {};
  const hostWorkspace = parseHostWorkspace(opts);
  let list = Array.isArray(schemas) ? schemas.slice() : [];
  if (!hostWorkspace) {
    list = list.filter((t) => !HOST_WORKSPACE_SET.has(t.name));
  }
  if (opts.builtinTools === false) {
    list = [];
  } else if (Array.isArray(opts.builtinTools)) {
    const allow = new Set(opts.builtinTools.map(String));
    list = list.filter((t) => allow.has(t.name));
  }
  if (opts.planMode) {
    // Keep write_file / search_replace so the model can edit plan.md; gate other writes at execute.
    list = list.filter((t) => t.name !== 'run_terminal_cmd');
  }
  if (opts.webFetch !== true) {
    list = list.filter((t) => t.name !== 'web_fetch');
  }
  return list;
}

function isHostWorkspaceTool(name) {
  return HOST_WORKSPACE_SET.has(name);
}

module.exports = {
  HOST_WORKSPACE_TOOLS,
  ALWAYS_RESERVED,
  ALWAYS_BUILTIN_RESERVED,
  parseHostWorkspace,
  filterBuiltinSchemas,
  isHostWorkspaceTool,
};