//-----------------------------------------------------------------------------
// 2022 Ahoy, https://www.mikrocontroller.net/topic/525778
// Creative Commons - http://creativecommons.org/licenses/by-nc-sa/3.0/de/
//-----------------------------------------------------------------------------

#include "web.h"

#include "html/h/index_html.h"
#include "html/h/style_css.h"
#include "favicon.h"
#include "html/h/setup_html.h"
#include "html/h/visualization_html.h"

//-----------------------------------------------------------------------------
web::web(app *main, sysConfig_t *sysCfg, config_t *config, char version[]) {
    mMain    = main;
    mSysCfg  = sysCfg;
    mConfig  = config;
    mVersion = version;
    mWeb = new ESP8266WebServer(80);
    mUpdater = new ESP8266HTTPUpdateServer();
    mUpdater->setup(mWeb);
}


//-----------------------------------------------------------------------------
void web::setup(void) {
    mWeb->begin();
    mWeb->on("/",               std::bind(&web::showIndex,         this));
    mWeb->on("/style.css",      std::bind(&web::showCss,           this));
    mWeb->on("/favicon.ico",    std::bind(&web::showFavicon,       this));
    mWeb->onNotFound (          std::bind(&web::showNotFound,      this));
    mWeb->on("/uptime",         std::bind(&web::showUptime,        this));
    mWeb->on("/reboot",         std::bind(&web::showReboot,        this));
    mWeb->on("/erase",          std::bind(&web::showErase,         this));
    mWeb->on("/factory",        std::bind(&web::showFactoryRst,    this));

    mWeb->on("/setup",          std::bind(&web::showSetup,         this));
    mWeb->on("/save",           std::bind(&web::showSave,          this));

    mWeb->on("/cmdstat",        std::bind(&web::showStatistics,    this));
    mWeb->on("/visualization",  std::bind(&web::showVisualization, this));
    mWeb->on("/livedata",       std::bind(&web::showLiveData,      this));
    mWeb->on("/json",           std::bind(&web::showJson,          this));
    mWeb->on("/api", HTTP_POST, std::bind(&web::showWebApi,        this));
}


//-----------------------------------------------------------------------------
void web::loop(void) {
    mWeb->handleClient();
}


//-----------------------------------------------------------------------------
void web::showIndex(void) {
    DPRINTLN(DBG_VERBOSE, F("showIndex"));
    String html = FPSTR(index_html);
    html.replace(F("{DEVICE}"), mSysCfg->deviceName);
    html.replace(F("{VERSION}"), mVersion);
    html.replace(F("{TS}"), String(mConfig->sendInterval) + " ");
    html.replace(F("{JS_TS}"), String(mConfig->sendInterval * 1000));
    html.replace(F("{BUILD}"), String(AUTO_GIT_HASH));
    mWeb->send(200, "text/html", html);
}


//-----------------------------------------------------------------------------
void web::showCss(void) {
    mWeb->send(200, "text/css", FPSTR(style_css));
}


//-----------------------------------------------------------------------------
void web::showFavicon(void) {
    static const char favicon_type[] PROGMEM = "image/x-icon";
    static const char favicon_content[] PROGMEM = FAVICON_PANEL_16;
    mWeb->send_P(200, favicon_type, favicon_content, sizeof(favicon_content));
}


//-----------------------------------------------------------------------------
void web::showNotFound(void) {
    DPRINTLN(DBG_VERBOSE, F("showNotFound - ") + mWeb->uri());
    String msg = F("File Not Found\n\nURI: ");
    msg += mWeb->uri();
    mWeb->send(404, F("text/plain"), msg);
}


//-----------------------------------------------------------------------------
void web::showUptime(void) {
    char time[21] = {0};
    uint32_t uptime = mMain->getUptime();

    uint32_t upTimeSc = uint32_t((uptime) % 60);
    uint32_t upTimeMn = uint32_t((uptime / (60)) % 60);
    uint32_t upTimeHr = uint32_t((uptime / (60 * 60)) % 24);
    uint32_t upTimeDy = uint32_t((uptime / (60 * 60 * 24)) % 365);

    snprintf(time, 20, "%d Days, %02d:%02d:%02d", upTimeDy, upTimeHr, upTimeMn, upTimeSc);

    mWeb->send(200, "text/plain", String(time) + "; now: " + mMain->getDateTimeStr(mMain->getTimestamp()));
}


//-----------------------------------------------------------------------------
void web::showReboot(void) {
    mWeb->send(200, F("text/html"), F("<!doctype html><html><head><title>Rebooting ...</title><meta http-equiv=\"refresh\" content=\"10; URL=/\"></head><body>rebooting ... auto reload after 10s</body></html>"));
    delay(1000);
    ESP.restart();
}


//-----------------------------------------------------------------------------
void web::showErase() {
    DPRINTLN(DBG_VERBOSE, F("showErase"));
    mMain->eraseSettings();
    showReboot();
}


//-----------------------------------------------------------------------------
void web::showFactoryRst(void) {
    DPRINTLN(DBG_VERBOSE, F("showFactoryRst"));
    String content = "";
    int refresh = 3;
    if(mWeb->args() > 0) {
        if(mWeb->arg("reset").toInt() == 1) {
            mMain->eraseSettings(true);
            content = F("factory reset: success\n\nrebooting ... ");
            refresh = 10;
        }
        else {
            content = F("factory reset: aborted");
            refresh = 3;
        }
    }
    else {
        content = F("<h1>Factory Reset</h1>"
            "<p><a href=\"/factory?reset=1\">RESET</a><br/><br/><a href=\"/factory?reset=0\">CANCEL</a><br/></p>");
        refresh = 120;
    }
    mWeb->send(200, F("text/html"), F("<!doctype html><html><head><title>Factory Reset</title><meta http-equiv=\"refresh\" content=\"") + String(refresh) + F("; URL=/\"></head><body>") + content + F("</body></html>"));
    if(refresh == 10) {
        delay(1000);
        ESP.restart();
    }
}


//-----------------------------------------------------------------------------
void web::showSetup(void) {
    DPRINTLN(DBG_VERBOSE, F("showSetup"));
    String html = FPSTR(setup_html);
    html.replace(F("{SSID}"), mSysCfg->stationSsid);
    // PWD will be left at the default value (for protection)
    // -> the PWD will only be changed if it does not match the default "{PWD}"
    html.replace(F("{DEVICE}"), String(mSysCfg->deviceName));
    html.replace(F("{VERSION}"), String(mVersion));
    if(mMain->getWifiApActive())
        html.replace("{IP}", String(F("http://192.168.1.1")));
    else
        html.replace("{IP}", (F("http://") + String(WiFi.localIP().toString())));

    String inv = "";
    Inverter<> *iv;
    for(uint8_t i = 0; i < MAX_NUM_INVERTERS; i ++) {
        iv = mMain->mSys->getInverterByPos(i);

        inv += F("<p class=\"subdes\">Inverter ") + String(i) + "</p>";
        inv += F("<label for=\"inv") + String(i) + F("Addr\">Address*</label>");
        inv += F("<input type=\"text\" class=\"text\" name=\"inv") + String(i) + F("Addr\" value=\"");
        if(NULL != iv)
            inv += String(iv->serial.u64, HEX);
        inv += F("\"/ maxlength=\"12\" onkeyup=\"checkSerial()\">");

        inv += F("<label for=\"inv") + String(i) + F("Name\">Name*</label>");
        inv += F("<input type=\"text\" class=\"text\" name=\"inv") + String(i) + F("Name\" value=\"");
        if(NULL != iv)
            inv += String(iv->name);
        inv += F("\"/ maxlength=\"") + String(MAX_NAME_LENGTH) + "\">";

        inv += F("<label for=\"inv") + String(i) + F("ActivePowerLimit\">Active Power Limit</label>");
        inv += F("<input type=\"text\" class=\"text\" name=\"inv") + String(i) + F("ActivePowerLimit\" value=\"");
        if(NULL != iv)
            inv += String(iv->powerLimit[0]);
        inv += F("\"/ maxlength=\"") + String(6) + "\">";

        inv += F("<label for=\"inv") + String(i) + F("ActivePowerLimitConType\">Active Power Limit Control Type</label>");
        inv += F("<select name=\"inv") + String(i);
        // UGLY! But I do not know it a better way
        // ToDo: Need Cookies, IndexDB or PWA for that or in general client browser storage
        if(NULL != iv){
        if(iv->powerLimit[1] == AbsolutNonPersistent)
            inv += F("PowerLimitControl\"><option value=\"0\">absolute in Watt non persistent</option><option value=\"1\">relativ in percent non persistent</option><option value=\"256\">absolute in Watt persistent</option><option value=\"257\">relativ in percent persistent</option></select>");
        if(iv->powerLimit[1] == RelativNonPersistent)
            inv += F("PowerLimitControl\"><option value=\"1\">relativ in percent non persistent</option><option value=\"0\">absolute in Watt non persistent</option><option value=\"256\">absolute in Watt persistent</option><option value=\"257\">relativ in percent persistent</option></select>");
        if(iv->powerLimit[1] == AbsolutPersistent)
            inv += F("PowerLimitControl\"><option value=\"256\">absolute in Watt persistent</option><option value=\"1\">relativ in percent non persistent</option><option value=\"0\">absolute in Watt non persistent</option><option value=\"257\">relativ in percent persistent</option></select>");
        if(iv->powerLimit[1] == RelativPersistent)
            inv += F("PowerLimitControl\"><option value=\"257\">relativ in percent persistent</option><option value=\"256\">absolute in Watt persistent</option><option value=\"1\">relativ in percent non persistent</option><option value=\"0\">absolute in Watt non persistent</option></select>");
        } else
            inv += F("PowerLimitControl\"><option value=\"0\">absolute in Watt non persistent</option><option value=\"1\">relativ in percent non persistent</option><option value=\"256\">absolute in Watt persistent</option><option value=\"257\">relativ in percent persistent</option></select>");
        // UGLY! But I do not know it a better way --//
        
        inv += F("<label for=\"inv") + String(i) + F("ModPwr0\" name=\"lbl") + String(i);
        inv += F("ModPwr\">Max Module Power (Wp)</label>");
        for(uint8_t j = 0; j < 4; j++) {
            inv += F("<input type=\"text\" class=\"text sh\" name=\"inv") + String(i) + F("ModPwr") + String(j) + F("\" value=\"");
            if(NULL != iv)
                inv += String(iv->chMaxPwr[j]);
            inv += F("\"/ maxlength=\"4\">");
        }
        inv += F("<br/><label for=\"inv") + String(i) + F("ModName0\" name=\"lbl") + String(i);
        inv += F("ModName\">Module Name</label>");
        for(uint8_t j = 0; j < 4; j++) {
            inv += F("<input type=\"text\" class=\"text sh\" name=\"inv") + String(i) + F("ModName") + String(j) + F("\" value=\"");
            if(NULL != iv)
                inv += String(iv->chName[j]);
            inv += F("\"/ maxlength=\"") + String(MAX_NAME_LENGTH) + "\">";
        }
    }
    html.replace(F("{INVERTERS}"), String(inv));


    // pinout
    String pinout;
    for(uint8_t i = 0; i < 3; i++) {
        pinout += F("<label for=\"") + String(pinArgNames[i]) + "\">" + String(pinNames[i]) + F("</label>");
        pinout += F("<select name=\"") + String(pinArgNames[i]) + "\">";
        for(uint8_t j = 0; j <= 16; j++) {
            pinout += F("<option value=\"") + String(j) + "\"";
            switch(i) {
                default: if(j == mConfig->pinCs)  pinout += F(" selected"); break;
                case 1:  if(j == mConfig->pinCe)  pinout += F(" selected"); break;
                case 2:  if(j == mConfig->pinIrq) pinout += F(" selected"); break;
            }
            pinout += ">" + String(wemosPins[j]) + F("</option>");
        }
        pinout += F("</select>");
    }
    html.replace(F("{PINOUT}"), String(pinout));


    // nrf24l01+
    String rf24;
    for(uint8_t i = 0; i <= 3; i++) {
        rf24 += F("<option value=\"") + String(i) + "\"";
        if(i == mConfig->amplifierPower)
            rf24 += F(" selected");
        rf24 += ">" + String(rf24AmpPowerNames[i]) + F("</option>");
    }
    html.replace(F("{RF24}"), String(rf24));


    html.replace(F("{INV_INTVL}"), String(mConfig->sendInterval));
    html.replace(F("{INV_RETRIES}"), String(mConfig->maxRetransPerPyld));

    html.replace(F("{SER_INTVL}"), String(mConfig->serialInterval));
    html.replace(F("{SER_VAL_CB}"), (mConfig->serialShowIv) ? "checked" : "");
    html.replace(F("{SER_DBG_CB}"), (mConfig->serialDebug) ? "checked" : "");

    html.replace(F("{NTP_ADDR}"),  String(mConfig->ntpAddr));
    html.replace(F("{NTP_PORT}"),  String(mConfig->ntpPort));

    html.replace(F("{MQTT_ADDR}"),  String(mConfig->mqtt.broker));
    html.replace(F("{MQTT_PORT}"),  String(mConfig->mqtt.port));
    html.replace(F("{MQTT_USER}"),  String(mConfig->mqtt.user));
    html.replace(F("{MQTT_PWD}"),   String(mConfig->mqtt.pwd));
    html.replace(F("{MQTT_TOPIC}"), String(mConfig->mqtt.topic));
    
    mWeb->send(200, F("text/html"), html);
}


//-----------------------------------------------------------------------------
void web::showSave(void) {
    DPRINTLN(DBG_VERBOSE, F("showSave"));

    if(mWeb->args() > 0) {
        char buf[20] = {0};

        // general
        if(mWeb->arg("ssid") != "")
            mWeb->arg("ssid").toCharArray(mSysCfg->stationSsid, SSID_LEN);
        if(mWeb->arg("pwd") != "{PWD}")
            mWeb->arg("pwd").toCharArray(mSysCfg->stationPwd, PWD_LEN);
        if(mWeb->arg("device") != "")
            mWeb->arg("device").toCharArray(mSysCfg->deviceName, DEVNAME_LEN);

        // inverter
        Inverter<> *iv;
        for(uint8_t i = 0; i < MAX_NUM_INVERTERS; i ++) {
            iv = mMain->mSys->getInverterByPos(i, false);
            // address
            mWeb->arg("inv" + String(i) + "Addr").toCharArray(buf, 20);
            if(strlen(buf) == 0)
                memset(buf, 0, 20);
            iv->serial.u64 = mMain->Serial2u64(buf);

            // active power limit
            uint16_t actPwrLimit = mWeb->arg("inv" + String(i) + "ActivePowerLimit").toInt();
            uint16_t actPwrLimitControl = mWeb->arg("inv" + String(i) + "PowerLimitControl").toInt();
            if (actPwrLimit != 0xffff && actPwrLimit > 0){
                iv->powerLimit[0] = actPwrLimit;
                iv->powerLimit[1] = actPwrLimitControl;
                iv->devControlCmd = ActivePowerContr;
                iv->devControlRequest = true;
                if (iv->powerLimit[1] & 0x0001)
                    DPRINTLN(DBG_INFO, F("Power limit for inverter ") + String(iv->id) + F(" set to ") + String(iv->powerLimit[0]) + F("%") );    
                else
                    DPRINTLN(DBG_INFO, F("Power limit for inverter ") + String(iv->id) + F(" set to ") + String(iv->powerLimit[0]) + F("W") );
                    DPRINTLN(DBG_INFO, F("Power Limit Control Setting ") + String(iv->powerLimit[1]));
            }
            if (actPwrLimit == 0xffff){ // set to 100%
                iv->powerLimit[0] = 100;
                iv->powerLimit[1] = RelativPersistent;
                iv->devControlCmd = ActivePowerContr;
                iv->devControlRequest = true;
                DPRINTLN(DBG_INFO, F("Power limit for inverter ") + String(iv->id) + F(" set to unlimted"));
            }
                
            // name
            mWeb->arg("inv" + String(i) + "Name").toCharArray(iv->name, MAX_NAME_LENGTH);

            // max channel power / name
            for(uint8_t j = 0; j < 4; j++) {
                iv->chMaxPwr[j] = mWeb->arg("inv" + String(i) + "ModPwr" + String(j)).toInt() & 0xffff;
                mWeb->arg("inv" + String(i) + "ModName" + String(j)).toCharArray(iv->chName[j], MAX_NAME_LENGTH);
            }
        }
        if(mWeb->arg("invInterval") != "")
            mConfig->sendInterval = mWeb->arg("invInterval").toInt();
        if(mWeb->arg("invRetry") != "")
            mConfig->maxRetransPerPyld = mWeb->arg("invRetry").toInt();

        // pinout
        uint8_t pin;
        for(uint8_t i = 0; i < 3; i ++) {
            pin = mWeb->arg(String(pinArgNames[i])).toInt();
            switch(i) {
                default: mConfig->pinCs  = pin; break;
                case 1:  mConfig->pinCe  = pin; break;
                case 2:  mConfig->pinIrq = pin; break;
            }
        }

        // nrf24 amplifier power
        mConfig->amplifierPower = mWeb->arg("rf24Power").toInt() & 0x03;

        // ntp
        if(mWeb->arg("ntpAddr") != "") {
            mWeb->arg("ntpAddr").toCharArray(mConfig->ntpAddr, NTP_ADDR_LEN);
            mConfig->ntpPort = mWeb->arg("ntpPort").toInt() & 0xffff;
        }

        // mqtt
        if(mWeb->arg("mqttAddr") != "") {
            mWeb->arg("mqttAddr").toCharArray(mConfig->mqtt.broker, MQTT_ADDR_LEN);
            mWeb->arg("mqttUser").toCharArray(mConfig->mqtt.user, MQTT_USER_LEN);
            mWeb->arg("mqttPwd").toCharArray(mConfig->mqtt.pwd, MQTT_PWD_LEN);
            mWeb->arg("mqttTopic").toCharArray(mConfig->mqtt.topic, MQTT_TOPIC_LEN);
            mConfig->mqtt.port = mWeb->arg("mqttPort").toInt();
        }

        // serial console
        if(mWeb->arg("serIntvl") != "") {
            mConfig->serialInterval = mWeb->arg("serIntvl").toInt() & 0xffff;

            mConfig->serialDebug  = (mWeb->arg("serDbg") == "on");
            mConfig->serialShowIv = (mWeb->arg("serEn") == "on");
            // Needed to log TX buffers to serial console
            mMain->mSys->Radio.mSerialDebug = mConfig->serialDebug;
        }

        mMain->saveValues();

        if(mWeb->arg("reboot") == "on")
            showReboot();
        else
            mWeb->send(200, F("text/html"), F("<!doctype html><html><head><title>Setup saved</title><meta http-equiv=\"refresh\" content=\"0; URL=/setup\"></head><body>"
                "<p>saved</p></body></html>"));
    }
}


//-----------------------------------------------------------------------------
void web::showStatistics(void) {
    DPRINTLN(DBG_VERBOSE, F("web::showStatistics"));
    mWeb->send(200, F("text/plain"), mMain->getStatistics());
}


//-----------------------------------------------------------------------------
void web::showVisualization(void) {
    DPRINTLN(DBG_VERBOSE, F("web::showVisualization"));
    String html = FPSTR(visualization_html);
    html.replace(F("{DEVICE}"), mSysCfg->deviceName);
    html.replace(F("{VERSION}"), mVersion);
    html.replace(F("{TS}"), String(mConfig->sendInterval) + " ");
    html.replace(F("{JS_TS}"), String(mConfig->sendInterval * 1000));
    mWeb->send(200, F("text/html"), html);
}


//-----------------------------------------------------------------------------
void web::showLiveData(void) {
    DPRINTLN(DBG_VERBOSE, F("web::showLiveData"));
    mWeb->send(200, F("text/html"), mMain->getLiveData());
}


//-----------------------------------------------------------------------------
void web::showJson(void) {
    DPRINTLN(DBG_VERBOSE, F("web::showJson"));
    mWeb->send(200, F("application/json"), mMain->getJson());
}

//-----------------------------------------------------------------------------
void web::showWebApi(void)
{
    DPRINTLN(DBG_VERBOSE, F("web::showWebApi"));
    DPRINTLN(DBG_DEBUG, mWeb->arg("plain"));
    const size_t capacity = 200; // Use arduinojson.org/assistant to compute the capacity.
    DynamicJsonDocument response(capacity);

    // Parse JSON object
    deserializeJson(response, mWeb->arg("plain"));
    // ToDo: error handling for payload
    uint8_t iv_id = response["inverter"];
    Inverter<> *iv = mMain->mSys->getInverterByPos(iv_id);
    if (NULL != iv)
    {
        if (response["tx_request"] == (uint8_t)TX_REQ_INFO)
        {
            //mMain->resetPayload(iv); // start request from new
            mMain->mSys->NextInfoCmd = response["cmd"];
            // process payload from web request corresponding to the cmd
            if (mMain->mSys->NextInfoCmd == AlarmData)
                iv->alarmMesIndex = response["payload"];
            DPRINTLN(DBG_INFO, F("Will make tx-request 0x15 with subcmd ") + String(mMain->mSys->InfoCmd) + F(" and payload ") + String(response["payload"]));
        }
        

        if (response["tx_request"] == (uint8_t)TX_REQ_DEVCONTROL)
        {
            if (response["cmd"] == (uint8_t)ActivePowerContr)
            {
                uint16_t webapiPayload = response["payload"];
                uint16_t webapiPayload2 = response["payload2"];
                if (webapiPayload > 0 && webapiPayload < 10000)
                {
                    iv->devControlCmd = ActivePowerContr;
                    iv->powerLimit[0] = webapiPayload;
                    if (webapiPayload2 > 0)
                    {
                        iv->powerLimit[1] = webapiPayload2; // dev option, no sanity check
                    }
                    else
                    {                                             // if not set, set it to 0x0000 default
                        iv->powerLimit[1] = AbsolutNonPersistent; // payload will be seted temporay in Watt absolut
                    }
                    if (iv->powerLimit[1] & 0x0001)
                    {
                        DPRINTLN(DBG_INFO, F("Power limit for inverter ") + String(iv->id) + F(" set to ") + String(iv->powerLimit[0]) + F("% via REST API"));
                    }
                    else
                    {
                        DPRINTLN(DBG_INFO, F("Power limit for inverter ") + String(iv->id) + F(" set to ") + String(iv->powerLimit[0]) + F("W via REST API"));
                    }
                    iv->devControlRequest = true; // queue it in the request loop
                }
            }
        }
    }
    mWeb->send(200, "text/json", "{success:true}");
}