import {
  OPENPI_CAPABILITY_NAMES,
  type OpenPiCapability,
} from "./tool-surface.ts";

const CAPABILITY_INTENT = {
  search:
    /\b(?:use|run)\s+(?:fd|rg)\b|\buse\s+(?:structured\s+)?(?:(?:file|code|content)\s+)?search\b|\b(?:structured|fast)\s+(?:file|code|content)\s+search\b|(?:使用|用|运行).{0,8}(?:fd|rg|git\s+(?:show|diff|log))|结构化(?:文件|代码|内容)搜索/iu,
  delegate:
    /\bsubagents?\b|(?:^|[.!?]\s+)(?:please\s+)?(?:delegate|parallelize)\s+(?:this|the)\s+(?:task|work)\b|\b(?:can|could|would)\s+you\s+(?:please\s+)?(?:delegate|parallelize)\s+(?:this|the)\s+(?:task|work)\b|\bparallel\s+agents?\b|^\s*子代理\s*[,，:：]?\s*(?:(?:来|去|请|帮(?:我|忙)?|负责|给我)\s*)?(?:(?:先|全面|系统(?:性地)?|深入|快速|仔细)\s*)?(?:了解|查看|检查|审查|分析|研究|调研|梳理|探索|实现|修复|处理|执行|完成|阅读|总结)|(?:使用|用|启动|调用|来|开).{0,8}子代理|(?:多个?|多路)子代理|并行.{0,8}(?:代理|agent)|委派.{0,6}(?:任务|给|出去)/iu,
  workflow: /\bworkflows?\b|(?:使用|用|运行|创建|构建).{0,8}工作流/iu,
  background:
    /\b(?:run|start|keep)\b.{0,40}\b(?:in the background|background\s+(?:process|terminal|job))\b|后台.{0,8}(?:运行|启动|进程|终端|任务)/iu,
  session:
    /\b(?:create|set|update|track)\s+(?:an?\s+)?(?:session\s+)?(?:goal|task list|tasks)\b|(?:设置|创建|更新|跟踪|追踪).{0,8}(?:目标|任务)/iu,
} as const satisfies Record<OpenPiCapability, RegExp>;

const CAPABILITY_GATEWAY_INTENT =
  /\bopenpi\s+(?:capabilit(?:y|ies)|tools?|features?)\b|openpi.{0,8}(?:能力|工具|功能)/iu;

const CONDITIONAL_OR_NEGATED_INTENT =
  /^(?:\s*(?:only\s+)?(?:if|when|unless|before|in case)\b)|\b(?:do not|don't|cannot|can't|not|no|never|avoid)\b|\b(?:if|unless)\b|\bwhen\s+(?:needed|required|necessary)\b|(?:如果|若|假如|除非|仅当|需要时|不要|不能|不用|不必|无需|避免|请勿|禁止)/iu;

function clauses(prompt: string) {
  return prompt.split(/[\n.!?。！？;；]+/u);
}

function isExplicitClause(clause: string) {
  return !CONDITIONAL_OR_NEGATED_INTENT.test(clause);
}

/**
 * One fail-closed interpretation of explicit user capability intent. The
 * English names `subagent` and `workflow` are reserved authorization words;
 * negated or conditional clauses remain inert. Runtime activation and
 * pre-submit UI feedback both cross this seam, so they cannot drift.
 */
export function capabilitiesRequestedByPrompt(prompt: string) {
  const promptClauses = clauses(prompt);
  return OPENPI_CAPABILITY_NAMES.filter((capability) =>
    promptClauses.some(
      (clause) =>
        isExplicitClause(clause) && CAPABILITY_INTENT[capability].test(clause),
    ),
  );
}

export function requestsCapabilityGateway(prompt: string) {
  return clauses(prompt).some(
    (clause) =>
      isExplicitClause(clause) && CAPABILITY_GATEWAY_INTENT.test(clause),
  );
}