#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <WiFi.h>
#include <WiFiClientSecure.h>
#include <SpotifyArduinoCert.h>
#include <SpotifyArduino.h>
#include <ArduinoJson.h>

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

char ssid[] = "";
char password[] = "";

char clientId[] = "";
char clientSecret[] = "";


#define SPOTIFY_MARKET "US"

#define SPOTIFY_REFRESH_TOKEN ""

WiFiClientSecure client;
SpotifyArduino spotify(client, clientId, clientSecret, SPOTIFY_REFRESH_TOKEN);

unsigned long delayBetweenRequests = 10000;
unsigned long requestDueTime;

void setup() {
    Serial.begin(115200);
    WiFi.mode(WIFI_STA);
    WiFi.begin(ssid, password);
    Serial.println("");

    while (WiFi.status() != WL_CONNECTED)
    {
        delay(500);
        Serial.print(".");
    }
    Serial.println("");
    Serial.print("Connected to ");
    Serial.println(ssid);
    Serial.print("IP address: ");
    Serial.println(WiFi.localIP());   
#if defined(ESP8266)
    client.setFingerprint(SPOTIFY_FINGERPRINT);
#elif defined(ESP32)
    client.setCACert(spotify_server_cert);
#endif
    Serial.println("Refreshing Access Tokens");
    if (!spotify.refreshAccessToken())
    {
        Serial.println("Failed to get access tokens");
    }

    if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
        Serial.println(F("SSD1306 allocation failed"));
        for(;;);
    }
    delay(2000);
    display.clearDisplay();
    display.setTextSize(1);
    display.setTextColor(WHITE);
}

void printCurrentlyPlayingToDisplay(CurrentlyPlaying currentlyPlaying) {
    display.clearDisplay();
    display.setCursor(0, 10);
    display.println("Currently Playing:");
    display.println(currentlyPlaying.trackName);
    display.println("by");
    display.println(currentlyPlaying.artists[0].artistName);
    display.display();
}

void loop()
{
    if (millis() > requestDueTime)
    {
        Serial.print("Free Heap: ");
        Serial.println(ESP.getFreeHeap());

        Serial.println("Getting currently playing song:");
        int status = spotify.getCurrentlyPlaying(printCurrentlyPlayingToDisplay, SPOTIFY_MARKET);
        if (status == 200)
        {
            Serial.println("Successfully got currently playing");
        }
        else if (status == 204)
        {
            Serial.println("Doesn't seem to be anything playing");
        }
        else
        {
            Serial.print("Error: ");
            Serial.println(status);
        }
        requestDueTime = millis() + delayBetweenRequests;
    }
}