#include <DNSServer.h>
#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
//#include <FS.h>
#include "index_html.h"
#include <list>

using namespace std;

#define TIMESTEPS 80000 // 1 millisecond
#define LINES_NUM 8

typedef unsigned int line_time_t;

enum {
  EVENT_NOTEON,
  EVENT_NOTEOFF,
  EVENT_JUMP,
  EVENT_BARRIER,
  EVENT_ENVELOPE // Todo
};

typedef struct {
  unsigned type;
  line_time_t time;
  unsigned tone;
  line_time_t new_cursor;
  unsigned lines_mask;
} event_t;

typedef struct {
  line_time_t cursor;
  // ADSR? Other line/synth parameters?
  list<event_t> events;
  list<event_t>::iterator next_event;
} line_t;

// Todo: jsonify() and unjsonify()
line_t lines[LINES_NUM];

void sequencer_init(void)
{
unsigned i;

  for(i = 0; i < LINES_NUM; ++i) {
    lines[i].cursor = 0;
    lines[i].next_event = lines[i].events.begin();
  }
  pinMode(2, OUTPUT);
}

// Call every TIMESTEPS seconds
void sequencer_main_loop(void)
{
unsigned i;

  // Restart main loop timer
  timer0_write(ESP.getCycleCount() + TIMESTEPS);

  for(i = 0; i < LINES_NUM; ++i) {
    while(lines[i].next_event != lines[i].events.end() && lines[i].next_event->time == lines[i].cursor) {
      // Peform event: lines[i].next_event
      // ...
      ++lines[i].next_event;
    }
    
    if(lines[i].next_event != lines[i].events.end())
      ++lines[i].cursor;
  }

  digitalWrite(2, !digitalRead(2));
}

const byte DNS_PORT = 53;
ESP8266WebServer server(80); //Server on port 80
IPAddress myIP = WiFi.softAPIP(); //Get IP address
DNSServer dnsServer;

void redirect_index()
{
  server.sendHeader("Location", "/");
  server.send(301);
}

void serve_index()
{
  server.sendHeader("Content-Encoding", "gzip");
  server.send_P(200, "text/html", (const char*)index_html_gz, index_html_gz_len);
}

void serve_random()
{
  server.send(200, "application/json", "{ \"val\": " + String(rand()) + " }");
}

void setup()
{
  // Start sequencer
  sequencer_init();

  noInterrupts();
  timer0_isr_init();
  timer0_attachInterrupt(sequencer_main_loop);
  timer0_write(ESP.getCycleCount() + TIMESTEPS);
  interrupts();
    
//  SPIFFS.begin();
  Serial.begin(115200);
  WiFi.mode(WIFI_AP);         //Only Access point
  WiFi.softAP("Gadgety", "gadgety123");  //Start HOTspot removing password will disable security
  // server.on("/", handleRoot); //Which routine to handle at root location 
  server.onNotFound([]() {
  //   handleRoot();
  });
  server.begin();                  //Start server
  //server.serveStatic("/", SPIFFS, "/index.html");

  server.onNotFound(redirect_index);
  server.on("/index.html", serve_index);
  server.on("/", serve_index);
  server.on("/random.ws", serve_random);

  dnsServer.start(DNS_PORT, "www.gadgety.com", myIP);
}
void loop() {
  dnsServer.processNextRequest();
  server.handleClient();          //Handle client requests
  if (server.arg(1)=="1") {
    Serial.print("Acceso");
    } else if (server.arg(1)=="0") {
    Serial.print("Spento");
    }
  
  
}

// void handleRoot() {
//   server.send (200, "text/html", index.html);
// }