/*

 WebServer to use as replacement for Sony RM-D27M to control Sony MiniDisc decks.

 Based on the the following sketches:
 - SimpleWifiServer example
 - ESP32/SD_Test
 - IRremote/SendDemo


 If the IP address of your shield is yourAddress:
 http://yourAddress/H turns the LED on
 http://yourAddress/L turns it off


 Circuit:
 - LED attached to pin 13 (optional)
 - IR Transmitter attached to pin 4 (connect to 5v or 3v3)
 - SD-Module to load HTML and CSS from SD-card

 Connect the SD card to the following pins:

 SD Card | ESP32
 ------- | -----
 3v3     | 3.3V
 CS      | 5
 MOSI    | 23
 CLK     | 18
 MISO    | 19
 GND     | GND

 developed for the ESP32vn IoT Uni board 2024
 */

//-----------------------------------------
// Arduino Web Server using AJAX
// HTML code of webpage is stored on SD card
//-----------------------------------------
#include <Arduino.h>
#include <WiFi.h>
#include <AsyncTCP.h>
#include <ESPAsyncWebServer.h>
#include "FS.h"
#include "SD.h"
#include "SPI.h"
#include <IRremote.hpp>
#include "secrets.h"
#include "defines.h"

//------------------------------------------------

// Create AsyncWebServer object on port 80
AsyncWebServer server(80);
// WiFiServer server(80);

const char *PARAM_MESSAGE = "message";

void notFound(AsyncWebServerRequest *request)
{
  request->send(404, "text/plain", "Not found");
}

//------------------------------------------------
//-------------- SD-Card Functions ---------------
void initSDCard()
{
  if (!SD.begin())
  {
    Serial.println("Card Mount Failed");
    return;
  }
  uint8_t cardType = SD.cardType();

  if (cardType == CARD_NONE)
  {
    Serial.println("No SD card attached");
    return;
  }
  Serial.print("SD Card Type: ");
  if (cardType == CARD_MMC)
  {
    Serial.println("MMC");
  }
  else if (cardType == CARD_SD)
  {
    Serial.println("SDSC");
  }
  else if (cardType == CARD_SDHC)
  {
    Serial.println("SDHC");
  }
  else
  {
    Serial.println("UNKNOWN");
  }
  uint64_t cardSize = SD.cardSize() / (1024 * 1024);
  Serial.printf("SD Card Size: %lluMB\n", cardSize);
}

void listDir(fs::FS &fs, const char *dirname, uint8_t levels)
{
  Serial.printf("Listing directory: %s\n", dirname);

  File root = fs.open(dirname);
  if (!root)
  {
    Serial.println("Failed to open directory");
    return;
  }
  if (!root.isDirectory())
  {
    Serial.println("Not a directory");
    return;
  }

  File file = root.openNextFile();
  while (file)
  {
    if (file.isDirectory())
    {
      Serial.print("  DIR : ");
      Serial.println(file.name());
      if (levels)
      {
        listDir(fs, file.path(), levels - 1);
      }
    }
    else
    {
      Serial.print("  FILE: ");
      Serial.print(file.name());
      Serial.print("  SIZE: ");
      Serial.println(file.size());
    }
    file = root.openNextFile();
  }
}

//------------------------------------------------
//--------------- IR Functions -------------------

void initIR()
{
  IrSender.begin(IR_SEND_PIN, ENABLE_LED_FEEDBACK, USE_DEFAULT_FEEDBACK_LED_PIN); // Specify send pin and enable feedback LED at default feedback LED pin
  Serial.println();
  Serial.print(F("Send IR signals at pin "));
  Serial.println(IR_SEND_PIN);
}

void sendButton(int command)
{
  Serial.println("sendButton command: ");
  Serial.println(command);
  Serial.flush();
  IrSender.sendSony(0xF, command, 2, 12);
}

//------------------------------------------------
//------------- Webserver Functions --------------

void initWiFi()
{
  WiFi.mode(WIFI_STA);
  WiFi.begin(SSID, PASSWORD);
  Serial.print("Connecting to WiFi ..");
  while (WiFi.status() != WL_CONNECTED)
  {
    Serial.print('.');
    delay(1000);
  }
  Serial.println(WiFi.localIP());
}

//------------------------------------------------
//-------------------- Setup ---------------------
void setup()
{
  Serial.begin(115200);
  initWiFi();
  initSDCard();

  pinMode(LED_PIN, OUTPUT); // set the LED pin mode

  initIR();

  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request)
            { request->send(SD, "/index.html", "text/html"); });

  server.serveStatic("/", SD, "/");

  // Send a GET request to <IP>/api/gettextinput?message=<message>
  server.on("/api/gettextinput", HTTP_GET, [](AsyncWebServerRequest *request)
            {
    String message;
    if (request->hasParam("text_input"))
    {
      message = request->getParam("text_input")->value();
      Serial.println(message);
    }
    else
    {
      message = "No message sent";
    }
    request->send(SD, "/index.html", "text/html"); });

  // Send a POST request to <IP>/api/control-led with a form field message set to <message>
  server.on("/api/control-led", HTTP_POST, [](AsyncWebServerRequest *request)
            {
        String message;
        if (request->hasParam("led", true)) {
            message = request->getParam("led", true)->value();
            if (message == "1")
              digitalWrite(LED_PIN, HIGH); 
            if (message == "0")
              digitalWrite(LED_PIN, LOW); 
        } else {
            message = "No message sent";
        }
        request->send(SD, "/index.html", "text/html"); });

  // Send a POST request to <IP>/api/gettext with a form field message set to <message>
  server.on("/api/gettext", HTTP_POST, [](AsyncWebServerRequest *request)
            {
        String message;
        if (request->hasParam("text_box", true)) {
            message = request->getParam("text_box", true)->value();
            Serial.println(message);
        } else {
            message = "No message sent";
        }
        request->send(SD, "/index.html", "text/html"); });

  // Send a POST request to <IP>/api/control-deck with a form field message set to <message>
  server.on("/api/control-deck", HTTP_POST, [](AsyncWebServerRequest *request)
            {
        String message;
        if (request->hasParam("control", true)) {
            message = request->getParam("control", true)->value();
            //Serial.print(message);
            sendButton(message);
            /* if (message == "POWER")
              sendButton(POWER);
            if (message == "PLAY")
              sendButton(PLAY);
            if (message == "PAUSE")
              sendButton(PAUSE);
            if (message == "STOP")
              sendButton(STOP);
            if (message == "PREV")
              sendButton(PREV);
            if (message == "NEXT")
              sendButton(NEXT); */
        } else {
            message = "No message sent";
        }
        request->send(SD, "/index.html", "text/html"); });

  server.onNotFound(notFound);

  server.begin();
}

void loop()
{
}