#include "my_mqtt.h"
#include "config.h"

#ifndef MQTT_ENABLE
#pragma message "MQTT_ENABLE is false. Skipping MQTT."
#else

#include "my_wifi.h"
#include <PubSubClient.h>
#include "Effect.h"
#include "effects.h"
#include "functions.h"
#include "tests.h"

WiFiClient wifi;
PubSubClient mqtt_client(wifi);
long mqtt_last_reconnect_attempt = 0;

uint8_t weather_icon_ids[6] = {0, 0, 0, 0, 0, 0};
int8_t weather_temperatures[6] = {0, 0, 0, 0, 0, 0};

void mqtt_callback(char* original_topic, byte* pl, unsigned int length) {
	pl[length] = '\0';
	String payload((char*)pl);
	String topic (original_topic);
	if (topic.equals(MQTT_TOPIC "log") || topic.equals(MQTT_TOPIC "status") || topic.equals(MQTT_TOPIC "status_details") || topic.startsWith(MQTT_TOPIC "metrics")) {
		// Return our own messages
		return;
	}
	LOGln("MQTT * In: %s = %s", topic.c_str(), payload.c_str());
	if (topic.startsWith(MQTT_TOPIC_WEATHER)) {
		// Weather stuff
		topic.remove(0, strlen(MQTT_TOPIC_WEATHER));
		DBG("MQTT * Weather stuff.");
		if (topic.startsWith("icons/")) {
			topic.remove(0, 6);
			uint8_t id = topic.toInt();
			if (id>=6) return;
			uint8_t val = payload.toInt();
			if (val==0) return;
			weather_icon_ids[id] = val;
			DBG("Set weather_icon_ids[%d] to value %d", id, val);
		} else if (topic.startsWith("temperatures/")) {
			topic.remove(0, 13);
			uint8_t id = topic.toInt();
			if (id>=6) return;
			uint8_t val = payload.toInt();
			if (val==0) return;
			weather_temperatures[id] = val;
			DBG("Set weather_temperatures[%d] to value %d", id, val);
		}
		return;
	} else if (topic.equals(MQTT_TOPIC_TIMER)) {
		timer = payload.toInt();
		LOGln("Set timer to %lu.", timer);
		return;
	}

	topic.remove(0, strlen(MQTT_TOPIC)); // Strip MQTT_TOPIC from the beginning

	if(topic.compareTo("mode")==0) {
		LOGln("MQTT * Changing mode...");
		bool result = change_current_effect(payload);
		if (result) {
			LOGln("MQTT * Effect changed.");
		} else {
			LOGln("MQTT * Could not change effect.");
		}
		return;
	} else if (topic.compareTo("reboot")==0) {
		LOGln("MQTT * Rebooting");
		ESP.restart();
		return; // Will never be reached, but anyway...
	} else if (topic.compareTo("run_tests")==0) {
		tests::run();
		return;
	}
	
	long value = payload.toInt();
	LOGln("MQTT * Payload as number: %d", value);
	
	if (topic.startsWith("settings.")) {
		topic.remove(0, 9);
		change_setting(topic.c_str(), value);
		return;
	} else if (topic.compareTo("brightness")==0) {
		if (value > 0 && value <= 255) {
			LOGln("MQTT * Changing brightness...");
			FastLED.setBrightness(value);
		} else {
			LOGln("MQTT * Ignoring brightness change: Value %d is out of bounds (0<x<=255).", value);
		}
		return;
	}

	LOGln("MQTT * Topic was not processed.");
}

boolean mqtt_connect() {
	LOGln("MQTT * Connecting to MQTT server with client id %s", hostname);
	mqtt_client.setBufferSize(350);
	if (mqtt_client.connect(hostname, MQTT_USER, MQTT_PASS, MQTT_TOPIC "status", 0, true, "OFFLINE", true)) {
		LOGln("MQTT * Connected.");
		LOGln("Core * Flash chip id: 0x%X. Size: %d bytes. 'Real' size: %d bytes.", ESP.getFlashChipId(), ESP.getFlashChipSize(), ESP.getFlashChipRealSize());
		char buffer[40];
		snprintf(buffer, 40, "ONLINE %s %s", hostname, WiFi.localIP().toString().c_str());
		mqtt_client.publish(MQTT_TOPIC "status", "ONLINE", true);
		mqtt_client.publish(MQTT_TOPIC "status_details", buffer, true);
		mqtt_client.subscribe(MQTT_TOPIC "+");
		mqtt_client.subscribe(MQTT_TOPIC_WEATHER "#");
		mqtt_client.subscribe(MQTT_TOPIC_TIMER);
		
		#ifdef MQTT_TOPIC_HOMEASSISTANT
		// Set MQTT values for homeassistant auto device discovery
		String topic = MQTT_TOPIC_HOMEASSISTANT "/light/";
		topic += hostname;
		topic += "/config";
		String message = "{\"~\":\"" MQTT_TOPIC "\",\"opt\":1,\"avty_t\":\"~status\",\"pl_avail\":\"ONLINE\",\"pl_not_avail\":\"OFFLINE\",";
		message += "\"bri_cmd_t\": \"~brightness\",\"bri_scl\":255,\"fx_cmd_t\":\"~modus\",\"name\":\"Pitrix\",\"uniq_id\":\"";
		message += hostname;
		message += "\",";
		message += "\"stat_t\":\"~modus\",\"cmd_t\":\"~modus\",\"pl_on\":\"cycle\",\"pl_off\":\"night_clock\"}";
		mqtt_client.publish(topic.c_str(), message.c_str(), true);
		DBG("MQTT * Homeassistant data:");
		DBG("MQTT * Topic: %s", topic.c_str());
		DBG("MQTT * Data: %s", message.c_str());
		#endif
	}
	return mqtt_client.connected();
}

void mqtt_setup() {
	mqtt_client.setServer(MQTT_SERVER, MQTT_PORT);
	mqtt_client.setCallback(mqtt_callback);
	mqtt_last_reconnect_attempt = 0;
}

void mqtt_loop() {
	if (!mqtt_client.connected()) {
		long now = millis();
		if (now - mqtt_last_reconnect_attempt > 5000) {
			mqtt_last_reconnect_attempt = now;
			if (mqtt_connect()) {
				mqtt_last_reconnect_attempt = 0;
			}
		}
	} else {
		mqtt_client.loop();
	}
}

String mqtt_log_str = String();

void mqtt_publish(const char* topic, int number, bool retain) {
	char b[32];
	sprintf(b, "%d", number);
	mqtt_publish(topic, b, retain);
}

void mqtt_publish(const char* topic, const char* message, bool retain) {
	char t[127];
	sprintf(t, MQTT_TOPIC "%s", topic);
	mqtt_client.publish(t, message, retain);
}

void mqtt_log(const char* message) {
	mqtt_log_str.concat(message);
}

void mqtt_log(int number) {
	mqtt_log(String(number).c_str());
}

void mqtt_log(long unsigned int number) { mqtt_log(String(number).c_str()); }
void mqtt_log(long int number) { mqtt_log(String(number).c_str()); }
void mqtt_log(size_t number) { mqtt_log(String(number).c_str()); }

void mqtt_log(String str) { mqtt_log(str.c_str()); }

void mqtt_log_ln(int number) {
	mqtt_log_ln(String(number).c_str());
}

void mqtt_log_ln(long unsigned int number) { mqtt_log_ln(String(number).c_str()); }
void mqtt_log_ln(long int number) { mqtt_log_ln(String(number).c_str()); }
void mqtt_log_ln(size_t number) { mqtt_log_ln(String(number).c_str()); }

void mqtt_log_ln(String str) { mqtt_log_ln(str.c_str()); }

void mqtt_log_ln(const char* message) {
	if (mqtt_log_str.length()==0) {
		mqtt_log_send(message);
		return;
	} else {
		mqtt_log_str.concat(message);
		mqtt_log_send(mqtt_log_str.c_str());
		mqtt_log_str = String();
	}
}

void mqtt_log_send(const char* message) {
	if (mqtt_client.connected()) {
		mqtt_client.publish(MQTT_TOPIC "log", message);
	}
}

#endif // MQTT_ENABLE