#!/bin/bash

source .env

## Check if we have a non expired token in cache, or get it
if [[ -f .token_cache ]]; then
        cached_timestamp=$(cat .token_cache | jq .expires_time)
        timestamp=$(date +%s)
        if [[ $timestamp -lt $cached_timestamp ]]; then
                sp_token=$(cat .token_cache | jq -r .token)
                [[ $sp_token == "null" ]] && unset sp_token
        fi
fi
if [[ ! $sp_token ]]; then
        base64_id="$(echo -n $sp_client_id:$sp_client_secret | base64 -w 0)"
        sp_token=$(curl -s --location --request POST 'https://accounts.spotify.com/api/token' --header "Authorization: Basic $base64_id" --data-urlencode 'grant_type=client_credentials' | jq -r .access_token)
        timestamp=$(date +%s)
        ((timestamp=timestamp+3600))
        echo -e "{\n\"token\": \"$sp_token\",\n\"expires_time\": $timestamp\n}" | jq . > .token_cache
fi

echo -n $sp_token