package com.pollex.pam.service;

import java.time.Instant;
import java.util.List;
import java.util.Objects;
import java.util.Optional;
import java.util.stream.Collectors;

import com.pollex.pam.domain.Satisfaction;
import com.pollex.pam.service.dto.AppointmentUpdateDTO;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.pollex.pam.domain.Appointment;
import com.pollex.pam.domain.AppointmentCustomerView;
import com.pollex.pam.enums.ContactStatusEnum;
import com.pollex.pam.repository.AppointmentCustomerViewRepository;
import com.pollex.pam.repository.AppointmentRepository;
import com.pollex.pam.security.SecurityUtils;
import com.pollex.pam.service.dto.AppointmentCreateDTO;
import com.pollex.pam.service.dto.AppointmentCustomerViewDTO;
import com.pollex.pam.service.mapper.AppointmentCustomerViewMapper;
import com.pollex.pam.service.mapper.AppointmentDTOMapper;
import com.pollex.pam.web.rest.errors.AppointmentNotFoundException;

import static com.pollex.pam.enums.AppointmentStatusEnum.AVAILABLE;
import static com.pollex.pam.enums.AppointmentStatusEnum.DELETED;

@Service
@Transactional
public class AppointmentService {

    private static final Logger log = LoggerFactory.getLogger(AppointmentService.class);

	@Autowired
	AppointmentRepository appointmentRepository;

	@Autowired
	AppointmentDTOMapper appointmentDTOMapper;

	@Autowired
	ConsultantService consultantService;

	@Autowired
	AppointmentCustomerViewMapper appointmentCustomerViewMapper;

	@Autowired
	AppointmentCustomerViewRepository appointmentCustomerViewRepository;

	@Autowired
	SatisfactionService satisfactionService;

	public Appointment customerCreateAppointment(AppointmentCreateDTO appointmentCreateDTO) {
		Appointment appointment = appointmentDTOMapper.toAppointment(appointmentCreateDTO);
        appointment.setStatus(AVAILABLE);
		appointment.setCustomerId(SecurityUtils.getCustomerDBId());
		appointment.setCommunicateStatus(ContactStatusEnum.RESERVED);
		return appointmentRepository.save(appointment);
	}

    public void updateAppointment(AppointmentUpdateDTO updateAppointmentDTO) {
        Appointment appointment = appointmentRepository.findById(updateAppointmentDTO.getId()).get();

        appointment.setPhone(updateAppointmentDTO.getPhone());
        appointment.setEmail(updateAppointmentDTO.getEmail());
        appointment.setContactType(updateAppointmentDTO.getContactType());
        appointment.setGender(updateAppointmentDTO.getGender());
        appointment.setAge(updateAppointmentDTO.getAge());
        appointment.setJob(updateAppointmentDTO.getJob());
        appointment.setRequirement(updateAppointmentDTO.getRequirement());
        appointment.setHopeContactTime(updateAppointmentDTO.getHopeContactTime());
        appointment.setOtherRequirement(updateAppointmentDTO.getOtherRequirement());
        appointment.setLastModifiedDate(Instant.now());

        appointmentRepository.save(appointment);
    }

    public void markAppointmentDeleted(Long appointmentId) {
        Appointment appointment = appointmentRepository.findById(appointmentId).get();
        appointment.setStatus(DELETED);
        appointment.setLastModifiedDate(Instant.now());
        appointmentRepository.save(appointment);
    }

	public List<Appointment> findByAgentNo(String agentNo) {
		return appointmentRepository.findByAgentNo(agentNo);
	}

	public Appointment markAsContacted(Long appointmentId) {
		Appointment appointment = appointmentRepository.findById(appointmentId).get();
		appointment.setCommunicateStatus(ContactStatusEnum.CONTACTED);
        appointment.setContactTime(Instant.now());
        appointment.setLastModifiedDate(Instant.now());
        return appointmentRepository.save(appointment);
	}

	public AppointmentCustomerViewDTO getAppointmentDetail(Long appointmentId) {
		AppointmentCustomerView appointment = appointmentCustomerViewRepository.findById(appointmentId)
				.orElseThrow(AppointmentNotFoundException::new);

        AppointmentCustomerViewDTO dto = appointmentCustomerViewMapper.toAppointmentCustomerViewDTO(appointment);
        setSatisfactionScore(dto, appointmentId);
		return dto;
	}

    public List<AppointmentCustomerViewDTO> getConsultantAvailableAppointments(String agentNo) {
        return appointmentCustomerViewRepository.findByAgentNo(agentNo).stream()
            .filter(appointment -> appointment.getStatus() == AVAILABLE)
            .map(appointmentCustomerView -> {
                AppointmentCustomerViewDTO dto = appointmentCustomerViewMapper.toAppointmentCustomerViewDTO(appointmentCustomerView);
                setSatisfactionScore(dto, appointmentCustomerView.getId());
                return dto;
            })
            .collect(Collectors.toList());
    }

    public void setSatisfactionScore(AppointmentCustomerViewDTO dto, Long appointmentId) {
        satisfactionService.getByAppointmentId(appointmentId).ifPresent(satisfaction -> {
            dto.setSatisfactionScore(satisfaction.getScore());
        });
    }

    public List<AppointmentCustomerView> findAvailableByAgentNoAndCustomerId(String agentNo, Long customerId) {
        return appointmentCustomerViewRepository.findByAgentNoAndCustomerId(agentNo, customerId)
            .stream()
            .filter(appointmentCustomerView -> appointmentCustomerView.getStatus() == AVAILABLE)
            .collect(Collectors.toList());
    }

    public Optional<Appointment> findLatestAppointmentByAgentNoAndCustomerId(String agentNo, Long customerId) {
        return appointmentRepository.findTopByAgentNoAndCustomerIdOrderByAppointmentDateDesc(agentNo, customerId);
    }

    public void recordConsultantReadTime(Long appointmentId) {
        Appointment appointment = appointmentRepository.findById(appointmentId).get();

        if(appointment.getConsultantReadTime() == null) {
            appointment.setConsultantReadTime(Instant.now());
            appointmentRepository.save(appointment);
        }
        else {
            log.debug("this appointment was read, read time = {}", appointment.getConsultantReadTime());
        }
    }

    public void recordAllAppointmentsView(String agentNo) {
        List<Appointment> consultantNotViewAppointments = findByAgentNo(agentNo)
            .stream()
            .filter(appointment -> Objects.isNull(appointment.getConsultantViewTime()))
            .collect(Collectors.toList());

        consultantNotViewAppointments.forEach(appointment -> appointment.setConsultantViewTime(Instant.now()));
        appointmentRepository.saveAll(consultantNotViewAppointments);
    }
}