import { exec } from "child_process";
import fs from "fs/promises";
import util from "util";
import { fileExists } from "./files";

export const usesEnvironmentVariable = async (envVarName: string) => {
  // do a text search in the source code for the environment variable
  // check all .ts, .js, .json, prisma.schema, and Dockerfile files

  // if the environment variable is found, return true
  // if the environment variable is not found, return false

  const execPromise = util.promisify(exec);

  const searchFiles = async (pattern: string, files: string[]) => {
    let excludeList: string[] = [];

    if (await fileExists(".gitignore")) {
      const gitignoreContent = await fs.readFile(".gitignore", "utf-8");
      const gitignorePatterns = gitignoreContent
        .split("\n")
        .filter((line) => line?.trim() && !line.startsWith("#"))
        .map((line) => line.trim());
      excludeList = gitignorePatterns;
    }

    try {
      const files = fs.glob(`**/*`);
      let filesToSearch = [];
      for await (const file of files) {
        console.log("file", file);
        console.log("excludeList", excludeList);
        if (!excludeList.some((pattern) => file.match(pattern))) {
          filesToSearch.push(file);
        }
      }

      if (filesToSearch.length === 0) {
        return false;
      }

      const grepCmd = `grep -rh '${pattern}' ${filesToSearch.join(" ")} 2>/dev/null`;
      const { stdout } = await execPromise(grepCmd);
      return stdout.trim().length > 0;
    } catch {
      return false;
    }
  };

  const filesToSearch = [
    "*.ts",
    "*.js",
    "*.json",
    "prisma.schema",
    "Dockerfile"
  ];

  const found = await searchFiles(envVarName, filesToSearch);
  return found;
};