import { ALL_TOOLS, TOOLS_BY_NAME } from './registry.js';

// v1.13.15-tools: tiered tool loading. BOOCODE_TOOLS env var (`core` |
// `standard` | `all`) filters the agent's tool whitelist before LLM dispatch.
// Daily-driver token win on qwen3.6-35b-a3b — the 35B-A3B MoE benefits from
// any prompt-cache stability win (fewer tools = shorter, more stable tool
// schemas in the system prompt). Pattern lift from eyaltoledano/claude-task-
// master (MIT + Commons Clause — pattern only, no code lift).
//
// The env var is a CEILING. It only narrows; never expands an agent's
// declared whitelist. Default behavior (var unset) is unchanged: all tools.
export const CORE_TOOL_NAMES = [
  'view_file',
  'list_dir',
  'grep',
  'find_files',
] as const;

export const STANDARD_TOOL_NAMES = [
  ...CORE_TOOL_NAMES,
  'web_search',
  'web_fetch',
  'git_status',
  'get_codebase_overview',
  'get_file_analysis',
  'get_symbol_info',
  'search_symbols',
  'get_dependencies',
  'watch_changes',
  'get_semantic_neighborhoods',
  'get_framework_analysis',
] as const;

// Module-load validation: every name in CORE / STANDARD must exist in
// TOOLS_BY_NAME. Catches typos and stale tier definitions before they reach
// production; server boot fails loudly rather than silently filtering valid
// tools out of agent whitelists.
for (const name of CORE_TOOL_NAMES) {
  if (!TOOLS_BY_NAME[name]) {
    throw new Error(`CORE_TOOL_NAMES references unknown tool: '${name}'`);
  }
}
for (const name of STANDARD_TOOL_NAMES) {
  if (!TOOLS_BY_NAME[name]) {
    throw new Error(`STANDARD_TOOL_NAMES references unknown tool: '${name}'`);
  }
}

export function resolveToolTier(tier: string | undefined): readonly string[] {
  switch ((tier ?? 'all').toLowerCase()) {
    case 'core':
      return CORE_TOOL_NAMES;
    case 'standard':
      return STANDARD_TOOL_NAMES;
    case 'all':
    default:
      return ALL_TOOLS.map((t) => t.name);
  }
}