import fetch from "node-fetch";

export class TimetableClient {
  constructor(apiEndpoint, token) {
    this.apiEndpoint = apiEndpoint;
    this.token = token;
  }
  login(password) {
    fetch(
      this.apiEndpoint + `/token?password=${encodeURIComponent(password)}`,
      { method: "post" }
    )
      .then((e) => {
        if (e.status == 401) {
          console.warn("Invalid Timetable V2 password!");
          return;
        } else if (e.status != 200) {
          console.log("Failed requesting Timetable V2 API-Token!");
          return;
        }
        return e.json();
      })
      .then((token) => (this.token = token.token));
  }
  getTimetables(forClass) {
    return new Promise((resolve, reject) => {
      fetch(
        this.apiEndpoint +
          `/timetable?token=${encodeURIComponent(
            this.token
          )}&class=${encodeURIComponent(forClass)}`
      )
        .then((e) => {
          if (e.status != 200) reject();
          else return e.json();
        })
        .then((timetables) => resolve(timetables));
    });
  }
  async getGroups(timetableClass, timetableId) {
    const timetables = await fetch(
      this.apiEndpoint +
        `/timetable?token=${encodeURIComponent(
          this.token
        )}&class=${encodeURIComponent(timetableClass)}`
    );
    const timetable = (await timetables.json()).timetables.find(
      (e) => e.id == timetableId
    );

    const foundTimetableGroups = [];
    if (!timetable.data) return [];
    // Make a list of all possible timetable groups
    // found in the current timetable
    for (const day of timetable.data) {
      for (const lesson of day) {
        if (Array.isArray(lesson) && lesson.length > 1) {
          for (const group of lesson) {
            if (group.group && !foundTimetableGroups.includes(group.group)) {
              foundTimetableGroups.push(group.group);
            }
          }
        }
      }
    }
    return foundTimetableGroups;
  }
  async getUpdates() {
    const history = await fetch(
      this.apiEndpoint + "/history" + `?token=${encodeURIComponent(this.token)}`
    );
    return await history.json();
  }
}