Build A Comprehensive Football/soccer Video Anal

#include <Arduino.h>
#include <Wire.h>
#include <WiFi.h>
#include <WebServer.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>


// Forward declarations
String selectedLabel();
String eventJson(const String &eventType);
void handleStatus();
void handleTag();
void drawScreen();
void emitLocalEvent(const String &type);
void readEncoder();
void readTagButton();

constexpr int OLED_SDA = 21;
constexpr int OLED_SCL = 22;
constexpr int ENC_CLK = 32;
constexpr int ENC_DT = 33;
constexpr int ENC_SW = 27;
constexpr int TAG_BUTTON = 25;
constexpr uint8_t SCREEN_WIDTH = 128;
constexpr uint8_t SCREEN_HEIGHT = 64;
constexpr char AP_SSID[] = "MatchTagger";
constexpr char AP_PASSWORD[] = "sideline2026";

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);
WebServer server(80);

bool homeTeam = true;
int playerNumber = 1;
bool clipOpen = false;
int lastEncoderClock = HIGH;
bool lastEncoderButton = HIGH;
bool lastTagButton = HIGH;
unsigned long encoderButtonChangedAt = 0;
unsigned long tagButtonPressedAt = 0;
unsigned long lastScreenUpdate = 0;
String lastEvent = "Ready";

String selectedLabel() {
  return String(homeTeam ? "Home" : "Away") + " #" + String(playerNumber);
}

String eventJson(const String &eventType) {
  return String("{\"event\":\"") + eventType +
         "\",\"team\":\"" + (homeTeam ? "home" : "away") +
         "\",\"player\":" + String(playerNumber) +
         ",\"timestamp_ms\":" + String(millis()) +
         ",\"clip_open\":" + (clipOpen ? "true" : "false") + "}";
}

void handleStatus() {
  String json = String("{\"device\":\"football-sideline-tagger\",\"selected\":\"") + selectedLabel() +
                "\",\"team\":\"" + (homeTeam ? "home" : "away") +
                "\",\"player\":" + String(playerNumber) +
                ",\"clip_open\":" + (clipOpen ? "true" : "false") +
                ",\"last_event\":\"" + lastEvent + "\",\"timestamp_ms\":" + String(millis()) + "}";
  server.send(200, "application/json", json);
}

void handleTag() {
  String type = server.hasArg("type") ? server.arg("type") : "manual_tag";
  lastEvent = type;
  server.send(200, "application/json", eventJson(type));
}

void drawScreen() {
  display.clearDisplay();
  display.setTextColor(SSD1306_WHITE);
  display.setTextSize(1);
  display.setCursor(0, 0);
  display.println("MATCH TAGGER");
  display.drawLine(0, 10, 127, 10, SSD1306_WHITE);
  display.setTextSize(2);
  display.setCursor(0, 16);
  display.println(homeTeam ? "HOME" : "AWAY");
  display.setCursor(0, 35);
  display.print("PLAYER ");
  display.println(playerNumber);
  display.setTextSize(1);
  display.setCursor(0, 55);
  display.print(clipOpen ? "CLIP RECORDING" : "Tap TAG / hold clip");
  display.display();
}

void emitLocalEvent(const String &type) {
  lastEvent = type;
  Serial.println(eventJson(type));
}

void readEncoder() {
  int clockState = digitalRead(ENC_CLK);
  if (clockState != lastEncoderClock && clockState == LOW) {
    if (digitalRead(ENC_DT) != clockState) {
      playerNumber++;
      if (playerNumber > 11) playerNumber = 1;
    } else {
      playerNumber--;
      if (playerNumber < 1) playerNumber = 11;
    }
    lastEvent = "selection_changed";
  }
  lastEncoderClock = clockState;

  bool encoderPressed = digitalRead(ENC_SW) == LOW;
  if (encoderPressed && !lastEncoderButton && millis() - encoderButtonChangedAt > 180) {
    homeTeam = !homeTeam;
    lastEvent = "team_changed";
    encoderButtonChangedAt = millis();
  }
  lastEncoderButton = encoderPressed;
}

void readTagButton() {
  bool pressed = digitalRead(TAG_BUTTON) == LOW;
  if (pressed && !lastTagButton) {
    tagButtonPressedAt = millis();
  }
  if (!pressed && lastTagButton) {
    unsigned long heldFor = millis() - tagButtonPressedAt;
    if (heldFor >= 700) {
      clipOpen = !clipOpen;
      emitLocalEvent(clipOpen ? "clip_start" : "clip_stop");
    } else {
      emitLocalEvent("match_tag");
    }
  }
  lastTagButton = pressed;
}

void setup() {
  Serial.begin(115200);
  pinMode(ENC_CLK, INPUT_PULLUP);
  pinMode(ENC_DT, INPUT_PULLUP);
  pinMode(ENC_SW, INPUT_PULLUP);
  pinMode(TAG_BUTTON, INPUT_PULLUP);

  Wire.begin(OLED_SDA, OLED_SCL);
  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println("SSD1306 allocation failed");
    while (true) delay(1000);
  }

  WiFi.mode(WIFI_AP);
  WiFi.softAP(AP_SSID, AP_PASSWORD);
  server.on("/status", HTTP_GET, handleStatus);
  server.on("/tag", HTTP_POST, handleTag);
  server.on("/tag", HTTP_GET, handleTag);
  server.begin();

  Serial.print("Tagger access point: ");
  Serial.println(WiFi.softAPIP());
  drawScreen();
}

void loop() {
  server.handleClient();
  readEncoder();
  readTagButton();
  if (millis() - lastScreenUpdate >= 100) {
    drawScreen();
    lastScreenUpdate = millis();
  }
}