#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>
#include <DHT12.h>
#include <html.h>

const char *ssid = "NodeMCU";
const char *password = "kvartira138";

ESP8266WebServer server(80);

DHT12 dht12(5, true);

const int led = 13;

long int lastUpdate = 0;
int t12 = 0;
int h12 = 0;
int acc = 0;
const int graph_size = 200;
int graph1[graph_size] = { 200 };
int graph1counter = 0;



void handleRoot()
{   
    const int arr_size = 10000;
    char *html_code = new char[arr_size];
    memset(html_code,  '\0', sizeof(char)*arr_size);

    int16_t bias = 0;
    int16_t bias2 = 0;
    bias += getHtml(HTML_BEGIN, *html_code, arr_size, 0);
    bias += getHtml(STYLE, *html_code, arr_size, bias);
    bias += getHtml(SCRIPT_BEGIN, *html_code, arr_size, bias);
    for (int i = 0; i != graph_size - 1; i++) {
        bias += snprintf((html_code+bias), arr_size - bias, "context.lineTo(%i*2, %i);", i, graph1[i]);
    }
    bias += getHtml(SCRIPT_END, *html_code, arr_size, bias);
    bias += snprintf(
        (html_code+bias), arr_size - bias,
        "<br> Current temperature: %i \
        <br> Current humudity: %i \
        <br />Current accelerometr: %i",
        t12, h12, acc);
    
    bias += getHtml(HTML_END, *html_code, arr_size, bias);

    server.send(200, "text/html", html_code);
    delete[] html_code;
}

void updateDHT()
{
    if ((millis() - lastUpdate) > 20)
    {
        // t12 = (int)dht12.readTemperature();
        // int t12_remapped = map(t12, -20, 100, 200, 0);
        // h12 = (int)dht12.readHumidity();
        acc = map(analogRead(A0), 512, 768, 200, 0);
        if (graph1counter < graph_size - 1) {
            graph1[graph1counter] = acc;
            graph1counter++;
        } else {  
            for(int i = 0; i != graph1counter; i++) {
                graph1[i] = graph1[i + 1];
            }       
            graph1[graph1counter] = acc;   
        }
        lastUpdate = millis();
    }
}

void handleNotFound()
{
    String message = "File Not Found\n\n";
    message += "URI: ";
    message += server.uri();
    message += "\nMethod: ";
    message += (server.method() == HTTP_GET) ? "GET" : "POST";
    message += "\nArguments: ";
    message += server.args();
    message += "\n";
    for (uint8_t i = 0; i < server.args(); i++)
    {
        message += " " + server.argName(i) + ": " + server.arg(i) + "\n";
    }
    server.send(404, "text/plain", message);
}

void setup(void)
{
    pinMode(A0, INPUT);
    Serial.begin(115200);	
    WiFi.softAP(ssid);

	IPAddress myIP = WiFi.softAPIP();
	Serial.print("AP IP address: ");
	Serial.println(myIP);
    
    server.on("/", handleRoot);

    server.on("/inline", []() {
        server.send(200, "text/plain", "this works as well");
    });

    server.onNotFound(handleNotFound);

    server.begin();
    Serial.println("HTTP server started");
}

void loop(void)
{   
    updateDHT();
    server.handleClient();
}