// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (C) 2022 Thomas Basler and others
 */

#include "ArduinoJson.h"
#include "AsyncJson.h"
#include "Battery.h"
#include "Configuration.h"
#include "PylontechCanReceiver.h"
#include "WebApi.h"
#include "WebApi_battery.h"
#include "WebApi_errors.h"
#include "helper.h"

void WebApiBatteryClass::init(AsyncWebServer* server)
{
    using std::placeholders::_1;

    _server = server;

    _server->on("/api/battery/status", HTTP_GET, std::bind(&WebApiBatteryClass::onStatus, this, _1));
    _server->on("/api/battery/config", HTTP_GET, std::bind(&WebApiBatteryClass::onAdminGet, this, _1));
    _server->on("/api/battery/config", HTTP_POST, std::bind(&WebApiBatteryClass::onAdminPost, this, _1));
}

void WebApiBatteryClass::loop()
{
}

void WebApiBatteryClass::onStatus(AsyncWebServerRequest* request)
{
    if (!WebApi.checkCredentialsReadonly(request)) {
        return;
    }
    
    AsyncJsonResponse* response = new AsyncJsonResponse();
    JsonObject root = response->getRoot();
    const CONFIG_T& config = Configuration.get();

    root[F("enabled")] = config.Battery_Enabled;

    response->setLength();
    request->send(response);
}

void WebApiBatteryClass::onAdminGet(AsyncWebServerRequest* request)
{
    onStatus(request);
}

void WebApiBatteryClass::onAdminPost(AsyncWebServerRequest* request)
{
    if (!WebApi.checkCredentials(request)) {
        return;
    }

    AsyncJsonResponse* response = new AsyncJsonResponse();
    JsonObject retMsg = response->getRoot();
    retMsg[F("type")] = F("warning");

    if (!request->hasParam("data", true)) {
        retMsg[F("message")] = F("No values found!");
        retMsg[F("code")] = WebApiError::GenericNoValueFound;
        response->setLength();
        request->send(response);
        return;
    }

    String json = request->getParam("data", true)->value();

    if (json.length() > 1024) {
        retMsg[F("message")] = F("Data too large!");
        retMsg[F("code")] = WebApiError::GenericDataTooLarge;
        response->setLength();
        request->send(response);
        return;
    }

    DynamicJsonDocument root(1024);
    DeserializationError error = deserializeJson(root, json);

    if (error) {
        retMsg[F("message")] = F("Failed to parse data!");
        retMsg[F("code")] = WebApiError::GenericParseError;
        response->setLength();
        request->send(response);
        return;
    }

    if (!(root.containsKey("enabled"))) {
        retMsg[F("message")] = F("Values are missing!");
        retMsg[F("code")] = WebApiError::GenericValueMissing;
        response->setLength();
        request->send(response);
        return;
    }

    CONFIG_T& config = Configuration.get();
    config.Battery_Enabled = root[F("enabled")].as<bool>();
    Configuration.write();

    retMsg[F("type")] = F("success");
    retMsg[F("message")] = F("Settings saved!");
    retMsg[F("code")] = WebApiError::GenericSuccess;

    response->setLength();
    request->send(response);

    if (config.Battery_Enabled) {
        PylontechCanReceiver.enable();
    }
}