const modules = require("./module");
const config = require("../config");
const axios = require("axios");

class AmazonBookSearch {
  constructor(location) {
    if (location !== "tr" && location !== "en") {
      throw new Error("Yanlış konum!");
    }

    this.url = location === "tr" ? config.tr_base_url : config.en_base_url;

    const fetchBookId = async (isbn) => {
      const headers = config.headers;

      try {
        const url = encodeURI(this.url + isbn);
        const response = await axios.get(url, { headers });
        if (!response.data) {
          throw new Error("Kitap bilgisi bulunamadı!");
        }

        const bookId = modules.extractBookId(response.data);

        return bookId;
      } catch (error) {
        throw new Error(error.message);
      }
    };

    this.getBookDetails = async (isbn, geminiApiKey) => {
      const headers = config.headers;
      try {
        const bookId = await fetchBookId(isbn);
        const url = encodeURI(
          location == "tr"
            ? config.tr_detail_url + bookId
            : config.en_detail_url + bookId
        );

        return new Promise((resolve, reject) => {
          setTimeout(async () => {
            try {
              const response = await axios.get(url, { headers });

              if (!response.data) {
                throw new Error("Detay bilgisi bulunamadı!");
              }
              const details = await modules.extractBookDetails(
                response.data,
                isbn,
                geminiApiKey,
                location
              );
              resolve(details);
            } catch (error) {
              reject(error);
            }
          }, config.fetchTimeout);
        });
      } catch (error) {
        throw new Error(error.message);
      }
    };
  }
}

module.exports = AmazonBookSearch;

// Gemini API Key girilirse, amazon'da bulunan kitap açıklaması gemini tarafından yeniden oluşturulur.
// (async () => {
//   try {
//     const BookSearch = new AmazonBookSearch("tr");
//     const bookDetails = await BookSearch.getBookDetails("9786257746168", "AIzaSyAY15XJcK1VIxzMRe48dyDEeNPqeqhQt2I");
//     console.log(bookDetails);
//   } catch (error) {
//     console.log(error.message);
//   }
// })();

// //
(async () => {
  try {
    const BookSearch = new AmazonBookSearch("en");
    const bookDetails = await BookSearch.getBookDetails("0593724283");
    console.log(bookDetails);
  } catch (error) {
    console.log(error.message);
  }
})();