/**
 * NOTE: This file is intentionally duplicated in dashboard-common.
 * If you change this file, also update:
 * npm-packages/dashboard-common/src/features/settings/components/formatEnvValueForDotfile.ts
 * and keep the copied tests in sync.
 */
export function formatEnvValueForDotfile(value: string): {
  formatted: string;
  warning: string | undefined;
} {
  let formatted = value,
    warning: string | undefined = undefined;

  const containsNewline = value.includes("\n");
  const containsSingleQuote = value.includes("'");
  const containsDoubleQuote = value.includes('"');
  const containsSlashN = value.includes("\\n");
  const commentWarning =
    value.includes("#") &&
    `includes a '#' which may be interpreted as a comment if you save this value to a .env file, resulting in only reading a partial value.`;
  if (containsNewline) {
    if (!containsSingleQuote) {
      formatted = `'${value}'`;
    } else if (!containsSlashN) {
      if (containsDoubleQuote && commentWarning) {
        warning = commentWarning;
      }
      formatted = `"${value.replaceAll("\n", "\\n")}"`;
    } else {
      formatted = `'${value}'`;
      warning = `includes single quotes, newlines and "\\n" in the value. If you save this value to a .env file, it may not round-trip.`;
    }
  } else if (
    (value.startsWith('"') && value.endsWith('"')) ||
    (value.startsWith("'") && value.endsWith("'")) ||
    value.startsWith("`") ||
    value.endsWith("`") ||
    value.includes("\f") ||
    value.includes("\v") ||
    commentWarning
  ) {
    if (containsSingleQuote && !containsDoubleQuote && !containsSlashN) {
      formatted = `"${value}"`;
    } else {
      formatted = `'${value}'`;
      if (containsSingleQuote && commentWarning) {
        warning = commentWarning;
      }
    }
  }
  if (value.includes("\r")) {
    warning = warning ? `${warning} It also ` : "";
    warning += `includes carriage return (\\r) which cannot be preserved in .env files (dotenv limitation)`;
  }

  return { formatted, warning };
}