#include <ESPMegaWebServer.hpp>

ESPMegaWebServer::ESPMegaWebServer(uint16_t port, ESPMegaIoT *iot)
{
    this->port = port;
    this->iot = iot;
    this->server = new AsyncWebServer(port);
}

ESPMegaWebServer::~ESPMegaWebServer()
{
    delete this->server;
}

void ESPMegaWebServer::begin()
{
    this->loadCredentialsFromFRAM();
    this->server->begin();
    auto bindedDashboardHandler = std::bind(&ESPMegaWebServer::dashboardHandler, this, std::placeholders::_1);
    this->server->on("/", HTTP_GET, bindedDashboardHandler);
    auto bindedConfigHandler = std::bind(&ESPMegaWebServer::configHandler, this, std::placeholders::_1);
    this->server->on("/config", HTTP_GET, bindedConfigHandler);
}

void ESPMegaWebServer::loop()
{
    // AsyncWebServer doesn't have a loop function
}

void ESPMegaWebServer::bindFRAM(FRAM *fram)
{
    this->fram = fram;
}

void ESPMegaWebServer::loadCredentialsFromFRAM()
{
    this->fram->read(301, (uint8_t*)this->webUsername, 32);
    this->fram->read(333, (uint8_t*)this->webPassword, 32);
    // Verify if credentials are valid
    // A valid username and password is null terminated
    // Scan for null terminator
    bool validUsername = false;
    bool validPassword = false;
    for (int i = 0; i < 32; i++)
    {
        if (this->webUsername[i] == '\0')
        {
            validUsername = true;
            break;
       }
    }
    for (int i = 0; i < 32; i++)
    {
        if (this->webPassword[i] == '\0')
        {
            validPassword = true;
            break;
        }
    }
    if (!validUsername || !validPassword)
    {
        this->resetCredentials();
        return;
    }
    // A valid username and password is at least 1 character long
    if(strlen(this->webUsername) == 0 || strlen(this->webPassword) == 0)
    {
        this->resetCredentials();
        return;
    }
}

void ESPMegaWebServer::saveCredentialsToFRAM()
{
    this->fram->write(301, (uint8_t*)this->webUsername, 32);
    this->fram->write(333, (uint8_t*)this->webPassword, 32);
}

void ESPMegaWebServer::resetCredentials()
{
    // The default username and password is "admin"
    strcpy(this->webUsername, "admin");
    strcpy(this->webPassword, "admin");
    this->saveCredentialsToFRAM();
}

char* ESPMegaWebServer::getWebUsername()
{
    return this->webUsername;
}

char* ESPMegaWebServer::getWebPassword()
{
    return this->webPassword;
}

void ESPMegaWebServer::setWebUsername(const char* username)
{
    strcpy(this->webUsername, username);
}

void ESPMegaWebServer::setWebPassword(const char* password)
{
    strcpy(this->webPassword, password);
}

void ESPMegaWebServer::dashboardHandler(AsyncWebServerRequest *request)
{
    auto bindedDashboardProcessor = std::bind(&ESPMegaWebServer::dashboardProcessor, this, std::placeholders::_1);
    request->send_P(200, "text/html", ota_html, bindedDashboardProcessor);
}

String ESPMegaWebServer::dashboardProcessor(const String &var)
{
    if (var == "hostname")
    {
        return String(this->iot->getNetworkConfig()->hostname);
    }
    else if (var == "ip_address")
    {
        return this->iot->getIp().toString();
    }
    else if (var == "mac_address")
    {
        return this->iot->getMac();
    }
    else if (var == "model")
    {
        return String("ESPMega PRO R3.3c");
    }
    else if (var == "mqtt_connection_string")
    {
        MqttConfig *mqttConfig = this->iot->getMqttConfig();
        String connectionString;
        connectionString += mqttConfig->mqtt_server;
        connectionString += ":";
        connectionString += mqttConfig->mqtt_port;
        return connectionString;
    }
    else if (var == "base_topic")
    {
        return String(this->iot->getMqttConfig()->base_topic);
    }
    else if (var == "mqtt_connected")
    {
        return this->iot->mqttConnected() ? "Connected" : "Standalone";
    }
    return "";
}

void ESPMegaWebServer::configHandler(AsyncWebServerRequest *request)
{
    auto bindedConfigProcessor = std::bind(&ESPMegaWebServer::configProcessor, this, std::placeholders::_1);
    request->send_P(200, "text/html", config_html, bindedConfigProcessor);
}

String ESPMegaWebServer::configProcessor(const String &var)
{
    MqttConfig *mqttConfig = this->iot->getMqttConfig();
    NetworkConfig *networkConfig = this->iot->getNetworkConfig();
    if (var == "ip_address")
    {
        return networkConfig->ip.toString();
    }
    else if (var == "netmask")
    {
        return networkConfig->subnet.toString();
    }
    else if (var == "gateway")
    {
        return networkConfig->gateway.toString();
    }
    else if (var == "dns")
    {
        return networkConfig->dns1.toString();
    }
    else if (var == "hostname")
    {
        return String(networkConfig->hostname);
    }
    else if (var == "bms_ip")
    {
        return String(mqttConfig->mqtt_server);
    }
    else if (var == "bms_port")
    {
        return String(mqttConfig->mqtt_port);
    }
    else if (var == "bms_useauth") {
        return mqttConfig->mqtt_useauth ? "checked=\"checked\"" : "";
    }
    else if (var == "bms_username")
    {
        return String(mqttConfig->mqtt_user);
    }
    else if (var == "bms_password")
    {
        return String(mqttConfig->mqtt_password);
    }
    else if (var == "bms_endpoint")
    {
        return String(mqttConfig->base_topic);
    }
    else if (var == "web_username")
    {
        return String(this->webUsername);
    }
    else if (var == "web_password")
    {
        return String(this->webPassword);
    }
    return "";
}

void ESPMegaWebServer::otaHandler(AsyncWebServerRequest *request)
{
    // Prepare to receive firmware

}