#!/usr/bin/env bash

function get_time_ms {
  date -u +%s%3N
}


URL_BASE="https://www.radiorecord.ru/api"
STATIONS=$(curl -s "$URL_BASE/stations/" | jq --argjson ids '[507,522,523,536,537,42532,42602]' '.result.stations | map(select(.id | IN($ids[]))) | map({id, title, stream_hls, icon_fill_white})')

MPV_PID_FILE="/tmp/mpv_radio_pid"
RADIO_ID_FILE="/tmp/radio_id"

get_radio() {
  echo "$STATIONS" | jq -r --argjson sel_id "$1" 'map(select(.id == $sel_id)).[0]'
}

get_song() {
 echo $(curl -s "$URL_BASE/station/history/?id=$1" | jq '.result.history[0] | ({id, artist, song, image600})')
}


# Function to play audio stream
start() {
  radio_url=$(get_radio $1 | jq -r ".stream_hls")
  if [ -f "$MPV_PID_FILE" ]; then
    mpv_pid=$(cat "$MPV_PID_FILE")
    if ps -p "$mpv_pid" > /dev/null; then
      kill -SIGTERM "$mpv_pid"
    fi
  fi
  mpv "$radio_url" & echo $! > "$MPV_PID_FILE"
  echo $1 > "$RADIO_ID_FILE"
}

# Function to pause/play the audio stream
pause() {
  if [ -f "$MPV_PID_FILE" ]; then
    mpv_pid=$(cat "$MPV_PID_FILE")
    if ps -p "$mpv_pid" > /dev/null; then
      kill -9 "$mpv_pid"
    fi
  fi
  rm -f $MPV_PID_FILE
}

play() {
  pause 
  radio_id=$(cat "$RADIO_ID_FILE")
  start "$radio_id"
}

toggle() {
  PID=$( [ -e "$MPV_PID_FILE" ] && cat "$MPV_PID_FILE" || echo 0 )
  RADIO_ID=$( [ -e "$RADIO_ID_FILE" ] && cat "$RADIO_ID_FILE" || echo 0 )
  PAUSED=$(( $PID == 0 && $RADIO_ID > 0 ? 1 : 0 ))
  if [ "$PAUSED" = 1 ]; then
    play
  else
    pause
  fi
}

status() {
  PID=$( [ -e "$MPV_PID_FILE" ] && cat "$MPV_PID_FILE" || echo 0 )
  RADIO_ID=$( [ -e "$RADIO_ID_FILE" ] && cat "$RADIO_ID_FILE" || echo 0 )
  PAUSED=$(( $PID == 0 && $RADIO_ID > 0 ? 1 : 0 ))
  INFO=$1
  RES=$(jq -cn --argjson pid "$PID" --argjson stations "$STATIONS" --argjson radio_id "$RADIO_ID" --argjson is_paused "$PAUSED" --argjson info "$INFO" '{"is_paused": $is_paused, "song": $info, "radio": $radio_id, "stations": $stations}')
  echo "$RES"
}


status_loop() {
  RADIO_ID=$( [ -e "$RADIO_ID_FILE" ] && cat "$RADIO_ID_FILE" || echo 0 )
  INFO=$(get_song "$RADIO_ID")
  status "$INFO"
  last_time_info=$(get_time_ms)
  last_time=$(get_time_ms)
  while true; do
    RADIO_ID=$( [ -e "$RADIO_ID_FILE" ] && cat "$RADIO_ID_FILE" || echo 0 )
    current_time=$(get_time_ms)
    delta=$((current_time - last_time_info))
    if [[ $delta -gt 15000 ]]; then
      NEW_INFO=$(get_song $RADIO_ID)
      INFO=$(echo "$INFO" "$NEW_INFO" | jq -s ' reduce .[] as $item ( {}; . + (
      reduce ($item | to_entries[]) as $entry ( {};
        if $entry.value != null then .[$entry.key] = $entry.value else . end
      )) )')

      last_time_info=$(get_time_ms)
    fi
    current_time=$(get_time_ms)
    delta=$((current_time - last_time))
    if [[ $delta -gt 1000 ]]; then
      status "$INFO"
      last_time=$(get_time_ms)
    fi
  done
}

# Main script
case "$1" in
  "start")
    start "$2"
    ;;
  "toggle")
    toggle
    ;;
  "pause")
    pause
    ;;
  "play")
    play
    ;;
  "status")
    RADIO_ID=$( [ -e "$RADIO_ID_FILE" ] && cat "$RADIO_ID_FILE" || echo 0 )
    INFO=$(get_song $RADIO_ID)
    status "$INFO"
    ;;
  *)
    RADIO_ID=$( [ -e "$RADIO_ID_FILE" ] && cat "$RADIO_ID_FILE" || echo 0 )
    echo $(get_song $RADIO_ID)
    status_loop
    ;;
esac