export const ENV_VAR_WRITE_APIS = ['setEnvVar', 'deleteEnvVar', 'setGlobalEnvVar'];

export const GITHUB_DISCUSSION_URL = 'https://github.com/usebruno/bruno/discussions/8257';

const COMMENT_OR_STRING = /"(?:[^"\\]|\\.)*"|'(?:[^'\\]|\\.)*'|`(?:[^`\\]|\\.)*`|\/\/[^\n]*|\/\*[\s\S]*?\*\//g;

export const ENV_VAR_WRITE_OPEN_PATTERN = new RegExp(`\\bbru\\s*\\.\\s*(?:${ENV_VAR_WRITE_APIS.join('|')})\\s*\\(`);

const PERSIST_FALSE = /persist\s*:\s*false/;

// Guard for the parenthesis walk below. A well-formed call stops at its closing ')' long before this
// — `bru.setEnvVar(key, value, { persist: false })` is at most a couple hundred characters. The cap
// only bites on malformed/unbalanced input (no closing paren), bounding the walk so the whole scan
// stays linear instead of O(n^2); on hitting it we fail safe and treat the call as a write.
const MAX_ARG_SCAN = 1024;

// A write persists to disk unless its own options carry `{ persist: false }`. We locate each
// `bru.<api>(` opening, then bound its arguments by walking parentheses manually — a regex can only
// balance nesting to a fixed depth, which let deeply-nested real writes slip past undetected. Only
// the call's top-level argument text is checked for persist:false, so a decoy buried inside a nested
// sub-call no longer suppresses the warning.
export const scriptWritesEnvVar = (code?: string | null) => {
  if (!code || typeof code !== 'string') return false;
  const stripped = code.replace(COMMENT_OR_STRING, '');
  const openPattern = new RegExp(ENV_VAR_WRITE_OPEN_PATTERN.source, 'g');
  let match;
  while ((match = openPattern.exec(stripped)) !== null) {
    let depth = 1;
    let topLevelArgs = '';
    const start = match.index + match[0].length;
    const end = Math.min(stripped.length, start + MAX_ARG_SCAN);
    for (let i = start; i < end && depth > 0; i++) {
      const ch = stripped[i];
      if (ch === '(') depth++;
      else if (ch === ')') depth--;
      else if (depth === 1) topLevelArgs += ch;
    }
    if (!PERSIST_FALSE.test(topLevelArgs)) return true;
  }
  return false;
};