import { getSyllabus } from "./syllabus.ts";
import { getCourseCode, getLetusEditon } from "./letus.ts";
import { encodeTitleURI } from "../scrapbox-userscript-std/dom.ts";
import { lightFormat } from "../date-fns/lightFormat.ts";

export const scrap = async (project: string) => {
  if (!location.href.includes("https://letus.ed.tus.ac.jp/course/view.php")) return;

  const pageTitle = window.prompt("page title");
  if (!pageTitle) return;
  
  const courseCode = getCourseCode(document);
  const year = getLetusEditon(document);
  const {
    title,
    englishTitle,
    instructors,
    semester,
    hours,
    credits,
    descriptions,
    objectives,
    outcomes,
    prerequisites,
    preparationAndReview,
    evaluation,
    references,
    plan,
  } = await getSyllabus(courseCode, year);

  const letusURL = location.href;

  const body = [
    "table:basic information",
    ` Course title\t${format(title)}`,
    ` Instructor\t${
      instructors.map((instructor) => `[${instructor.replace("　", "")}]`)
    }`,
    ` Schedule\t${semester} ${hours.join(" ")}`,
    ` Course credits\t${credits}`,
    ` Course code\t${courseCode}`,
    `[LETUS ${letusURL}]`,
    `[syllabus https://tus-class-api.vercel.app/v1/${year}/${courseCode}]`,
    "",
    "Descriptions",
    ...descriptions.map((text) => ` ${format(text)}`),
    "",
    "Objectives",
    ...objectives.map((text) => ` ${format(text)}`),
    "",
    "Outcomes",
    ...outcomes.map((text) => ` ${format(text)}`),
    "",
    "Course notes prerequisites",
    ...prerequisites.map((text) => ` ${format(text)}`),
    "",
    "Preparation and review",
    ...preparationAndReview.map((text) => ` ${format(text)}`),
    "",
    "Evaluation",
    ...evaluation.map((text) => ` ${format(text)}`),
    "",
    "Materials",
    ...references.map((text) => ` ${format(text)}`),
    "",
    "Plan",
    ...plan.map((text) => ` ${format(text)}`),
    "",
    `#${lightFormat(new Date(), "yyyy-MM-dd HH:mm:ss")}`,
  ].join("\n");

  window.open(
    `https://scrapbox.io/${project}/${encodeTitleURI(pageTitle)}?body=${
      encodeURIComponent(body)
    }`,
    "_self",
  );
};

const format = (text: string): string =>
  text
    .replace(/\s+$/, "") // 末尾の余計な空白を消す
    .replace(/^(\s*)・/, "$1 ") // ・を箇条書きに変える
    .replace(
      /[Ａ-Ｚａ-ｚ０-９]/g,
      (s) => String.fromCharCode(s.charCodeAt(0) - 0xFEE0),
    ) // 全角英数を半角に直す
    .replace(/\s?\[/g, "［") // リンク記法をescapeする
    .replace(/\s?\[/g, "［")
    .replace(/(\d+)．\s*/g, "$1. ") // 番号付き箇条書きにする
    .replaceAll("．", "。") // 句読点を変換する
    .replaceAll("，", "、");