import { ref } from "@vue/reactivity";
import { watch } from "@vue/runtime-core";
import media from "./mediaNotification.js";
import playAudio from "./playAudio.js";
import state from "./state.js";

const current = ref(state.current);

const next = ref({
  title: "The next song",
  artists: ["... blah blah blah"],
  image: "http://0.0.0.0:8900/images/defaults/4.webp",
  _id: {
    $oid: "",
  },
});

const prev = ref(state.prev);

const queue = ref(state.queue);

const search = ref("");

const putCommas = (artists) => {
  let result = [];

  artists.forEach((i, index, artists) => {
    if (index !== artists.length - 1) {
      result.push(i + ", ");
    } else {
      result.push(i);
    }
  });

  return result;
};

function updateNext(song_) {
  const index = state.queue.value.findIndex(
    (item) => item.track_id === song_.track_id
  );

  if (index == queue.value.length - 1) {
    next.value = queue.value[0];
    state.prev.value = queue.value[queue.value.length - 2];
  } else if (index == 0) {
    next.value = queue.value[1];
  } else {
    next.value = queue.value[index + 1];
  }
}

function updatePrev(song) {
  const index = state.queue.value.findIndex(
    (item) => item.track_id === song.track_id
  );

  if (index == 0) {
    prev.value = queue.value[queue.value.length - 1];
  } else if (index == queue.value.length - 1) {
    prev.value = queue.value[index - 1];
  } else {
    prev.value = queue.value[index - 1];
  }
}

const readQueue = () => {
  const prev_queue = JSON.parse(localStorage.getItem("queue"));
  const last_played = JSON.parse(localStorage.getItem("current"));

  if (last_played) {
    state.current.value = last_played;
  }

  if (prev_queue) {
    state.queue.value = prev_queue;

    updateNext(state.current.value);
    updatePrev(state.current.value);
  }
};

const updateQueue = async (song, type) => {
  playAudio.playAudio(song.filepath);
  let list;

  switch (type) {
    case "folder":
      list = state.folder_song_list.value;
      break;
    case "album":
      list = state.album_song_list.value;
      break;
  }

  if (state.queue.value[0].track_id !== list[0].track_id) {
    const new_queue = list;
    localStorage.setItem("queue", JSON.stringify(new_queue));
    state.queue.value = new_queue;
  }

  state.current.value = song;
  localStorage.setItem("current", JSON.stringify(song));
};

function focusCurrent() {
  const elem = document.getElementsByClassName("currentInQueue")[0];

  if (elem) {
    elem.scrollIntoView({
      behavior: "smooth",
      block: "center",
      inline: "center",
    });
  }
}

function getElem(identifier, type) {
  switch (type) {
    case "class": {
      return document.getElementsByClassName(identifier)[0];
    }
    case "id": {
      return document.getElementById(identifier);
    }
  }
}

function focusSearchBox() {
  const elem = getElem("search", "id");

  elem.focus();
}

setTimeout(() => {
  watch(current, (new_current) => {
    media.showMediaNotif();

    updateNext(new_current);
    updatePrev(new_current);

    localStorage.setItem("current", JSON.stringify(new_current));
  });
}, 1000);

let key_down_fired = false;

window.addEventListener("keydown", (e) => {
  let target = e.target;
  let ctrlKey = e.ctrlKey;

  switch (e.key) {
    case "ArrowRight":
      if (target.tagName == "INPUT") return;

      {
        if (!key_down_fired) {
          key_down_fired = true;

          setTimeout(() => {
            key_down_fired = false;
          }, 1000);

          playAudio.playNext();
        }
      }
      break;

    case "ArrowLeft":
      {
        if (!key_down_fired) {
          if (target.tagName == "INPUT") return;

          key_down_fired = true;

          playAudio.playPrev();

          setTimeout(() => {
            key_down_fired = false;
          }, 1000);
        }
      }

      break;

    case " ":
      {
        if (!key_down_fired) {
          if (target.tagName == "INPUT") return;
          e.preventDefault();
          key_down_fired = true;

          playAudio.playPause();
        }
      }

      break;

    case "f": {
      if (!key_down_fired) {
        if (!ctrlKey) return;
        e.preventDefault();
        focusSearchBox();

        key_down_fired = true;
      }
    }
  }
});

window.addEventListener("keyup", () => {
  key_down_fired = false;
});

function formatSeconds(seconds) {
  const date = new Date(seconds * 1000);

  const hh = date.getUTCHours();
  const mm = date.getUTCMinutes();
  const ss = date.getUTCSeconds();

  const _hh = hh < 10 ? `0${hh}` : hh;
  const _mm = mm < 10 ? `0${mm}` : mm;
  const _ss = ss < 10 ? `0${ss}` : ss;

  if (hh > 0) {
    return `${_hh}:${_mm}:${_ss}`;
  } else {
    return `${_mm}:${_ss}`;
  }
}

export default {
  putCommas,
  readQueue,
  focusCurrent,
  updateQueue,
  formatSeconds,
  current,
  queue,
  next,
  prev,
  search,
};