import { PDFDocument } from "pdf-lib";
import { loadPdfForm } from "../util/saveLoadPdf.ts";
import { callWithArgPrompt } from "util/call.ts";

export async function checkFile(pdfPath: string, csPath: string) {
  while (!pdfPath || !pdfPath.endsWith(".pdf")) {
    pdfPath = prompt("Please provide path to PDF file:") || "";
  }
  while (!csPath || !csPath.endsWith(".cs")) {
    csPath = prompt("Please provide path to CS class file:") || "";
  }

  const form = await loadPdfForm(pdfPath);

  const fields = form.getFields();
  const csFiles = await Promise.all(
    csPath.split(",").map((c) => Deno.readTextFile(c.trim())),
  );

  const fieldNames: string[] = fields.map((f) => f.getName())
    .filter((f) => {
      const rx = new RegExp(
        `(?<!//\s?)case ?"${f.replace(/\[\d\]/, "\\[\\?\\]")}"`,
      );
      return !csFiles.some((c) => rx.test(c));
    })
    .filter((f) => !f.toLowerCase().includes("signature"));

  if (fieldNames.length) {
    console.log(
      "%cThe following field names are not present in the CS code",
      "color: red",
    );
    console.log(fieldNames);
    alert("Your princess is in another castle...");
  } else {
    console.log("%cAll form fields present", "color: lime");
    alert("Ok!");
  }
}

class CheckCode implements ITool {
  name = "checkcode";
  description = "Checks if form fields are present in CS code";
  help() {
    console.log("Usage: checkcode <pdfPath> <csPath>");
  }
  async run(...args: string[]) {
    await callWithArgPrompt(checkFile, [
      ["Please provide path to PDF file:", (p) => !!p && p.endsWith(".pdf")],
      [
        "Please provide path to CS file (comma separated for multiple):",
        (p) => !!p && p.endsWith(".cs"),
      ],
    ], args);
  }
}

export default new CheckCode();