import { ensureDir } from "../deno_std%2Ffs/mod.ts";
import { parse } from "../deno_std%2Fflags/mod.ts";
import { join } from "../deno_std%2Fpath/mod.ts";
import { getPDFpageNum } from '../PDFのページ数を取得/deno.ts';
import { Command } from "https://deno.land/x/cliffy@v0.25.7/command/mod.ts";
import ProgressBar from "https://deno.land/x/progress@v1.3.8/mod.ts";

const { args: [filename], options } = await new Command()
    .name("pdftotext-1by1")
    .description("pdfから1 pageずつテキストを取得する")
    .version("v1.0.0")
    .option("-l, --last <last:number>", "ここで指定したページ数までテキストを取得する")
    .option(
      "-o, --output <output:string>",
      "出力先directory",
    )
    .arguments("<filename:string>")
    .parse(Deno.args);
options.output ??= Deno.cwd();
await ensureDir(options.output);
const json = [];
const pageNum = options.last ?? await getPDFpageNum(await Deno.readFile(filename));
const zero = (n: number) => `${n}`.padStart(Math.floor(Math.log10(pageNum)) + 1, '0');
const progress = new ProgressBar({
  total: pageNum,
});
progress.render(0);
for (let i = 0; i < pageNum; i++) {
  const page = i + 1;
  const path = join(options.output, `./${zero(page)}.txt`);
  const command = new Deno.Command("pdftotext", {
    args: ["-f", `${page}`, "-l", `${page}`, filename, path],
  });
  const { success, stderr } = await command.output();
  if (!success) {
    const message = new TextDecoder().decode(stderr);
    console.error(message);
    throw Error(message);
  }
  const text = await Deno.readTextFile(path);
  json.push(text);
  progress.render(page);
}

await Deno.writeTextFile(join(options.output, `./text-data.json`), JSON.stringify(json));