#!/bin/bash
. ./.env

LOCATION="Poznan"
IS_CELSIUS=true


get_data() {
  local tmp_file="/tmp/weather_$LOCATION.json"
  local last_changed=0;

  if [ -e "$tmp_file" ]
  then
      local last_changed=$(stat -c "%Y" $tmp_file)
  fi
  
  local current_time=$(date +%s)
  local should_request=$((($current_time - $last_changed) > 300))

  if (($should_request))
  then
    curl -s "http://api.apixu.com/v1/current.json?key=$API_KEY&q=$LOCATION" > $tmp_file; #API_KEY comes from .env
  fi
  WEATHER=$(cat $tmp_file)
 }
 
 get_weather() {
  local presenter=()
  local temp="c"
  
  if [ "$IS_CELSIUS" == false ]
  then
    temp="f"
  fi
  clear
  get_data
  
  presenter+=("City: $(echo $WEATHER | jq -r '.location.name')")
  presenter+=("Country: $(echo $WEATHER | jq -r '.location.country')")
  presenter+=("Temperature: $(echo $WEATHER | jq -r '.current.temp_'$temp) ${temp^}")
  presenter+=("Feels like: $(echo $WEATHER | jq -r '.current.feelslike_'$temp) ${temp^}")
  presenter+=("Wind: $(echo $WEATHER | jq -r '.current.wind_kph')")
  presenter+=("Presure: $(echo $WEATHER | jq -r '.current.pressure_mb')")
  presenter+=("Humidity: $(echo $WEATHER | jq -r '.current.humidity')")
  presenter+=("Cloudy: $(echo $WEATHER | jq -r '.current.cloud')")

  echo "$(printf '%s\n' "${presenter[@]}")"
}

while getopts "ldf" opt; do
  case $opt in
    l)
      OPTARG=${!OPTIND}

      if [ "$#" -lt "$OPTIND" ]; then
        OPTARG=$LOCATION
      else
        OPTIND=$(( $OPTIND + 1 ))
      fi

      LOCATION="$OPTARG"
      ;;
    d)
      IS_DYNAMIC=true
      ;;
    f)
      IS_CELSIUS=false
      ;;
  esac
done

if [ "$IS_DYNAMIC" == true ]
  then
  while [ true ]
    do
      get_weather
      sleep 300;
    done
  else
    get_weather
fi