'use strict';

const fs = require('fs');
const path = require('path');
const os = require('os');

const RETIRE_SCRIPT_CANDIDATES = [
  path.join(__dirname, '../../开发文档/脚本/retire_cochat.sh'),
  path.join(process.cwd(), '开发文档/脚本/retire_cochat.sh'),
];

function findRetireScript() {
  const ws = process.env.PCHAT_WORKSPACE || '/Users/karuo/Documents/个人';
  const candidates = [
    path.join(ws, '开发文档/脚本/retire_cochat.sh'),
    ...RETIRE_SCRIPT_CANDIDATES,
  ];
  for (const p of candidates) {
    if (fs.existsSync(p)) return p;
  }
  return null;
}

function coChatInstalled() {
  const extGlob = path.join(os.homedir(), '.cursor/extensions');
  if (!fs.existsSync(extGlob)) return { installed: false, paths: [] };
  const paths = fs.readdirSync(extGlob).filter((d) => d.startsWith('co-chat.co-chat-panel')).map((d) => path.join(extGlob, d));
  return { installed: paths.length > 0, paths };
}

function checkRetirePreconditions(enhanceState) {
  const script = findRetireScript();
  const co = coChatInstalled();
  const patchPass = !!(enhanceState?.patchOk || enhanceState?.patchNativeOk);
  const gates = {
    permOk: !!enhanceState?.permOk,
    patchOk: !!enhanceState?.patchOk,
    patchNativeOk: !!enhanceState?.patchNativeOk,
    cursorPrefOk: !!enhanceState?.cursorPrefOk,
    scriptReady: !!script,
    coChatPresent: co.installed,
  };
  const ready = gates.scriptReady && gates.permOk && patchPass && gates.cursorPrefOk;
  return {
    ok: true,
    script,
    coChat: co,
    gates,
    canExecute: ready,
    message: ready
      ? '前置全绿，可执行 retire_cochat.sh（需人工确认）'
      : '未满足卸载前置：需 W2 + W8（patchOk 或 patchNativeOk）+ W6 + retire 脚本就绪',
  };
}

module.exports = { findRetireScript, checkRetirePreconditions, coChatInstalled };