package com.social.media.application.campaign.service;

import com.social.media.application.campaign.command.CreateAutomationCampaignCommand;
import com.social.media.application.campaign.handler.CreateAutomationCampaignHandler;
import com.social.media.application.campaign.dto.AutomationCampaignDto;
import com.social.media.application.campaign.dto.CampaignExecutionDto;
// import com.social.media.application.campaign.mapper.AutomationCampaignMapper;
import com.social.media.domain.campaign.aggregate.AutomationCampaign;
import com.social.media.domain.campaign.entity.CampaignExecution;
import com.social.media.domain.campaign.repository.AutomationCampaignRepository;
import com.social.media.domain.campaign.repository.CampaignExecutionRepository;
import com.social.media.domain.campaign.service.AutomationCampaignDomainService;
import com.social.media.domain.campaign.valueobject.*;
import com.social.media.domain.shared.exception.BusinessRuleViolationException;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.Map;
import java.util.Optional;

/**
 * Automation Campaign Application Service
 * Orchestrates campaign-related use cases
 */
@Slf4j
@Service
@RequiredArgsConstructor
public class AutomationCampaignApplicationService {
    
    private final CreateAutomationCampaignHandler createCampaignHandler;
    private final AutomationCampaignDomainService campaignDomainService;
    private final AutomationCampaignRepository campaignRepository;
    private final CampaignExecutionRepository executionRepository;
    // private final AutomationCampaignMapper campaignMapper;
    
    /**
     * Creates a new automation campaign
     */
    @Transactional
    public AutomationCampaignDto createCampaign(CreateAutomationCampaignCommand command) {
        log.info("Creating automation campaign for company: {}", command.getCompanyId());
        
        AutomationCampaign campaign = createCampaignHandler.handle(command);
        // Implementação temporária sem mapper
        throw new UnsupportedOperationException("Mapper temporariamente desabilitado");
    }
    
    /**
     * Starts a campaign
     */
    @Transactional
    public AutomationCampaignDto startCampaign(Long campaignId) {
        log.info("Starting campaign: {}", campaignId);
        
        // Implementação temporária sem mapper
        throw new UnsupportedOperationException("Mapper temporariamente desabilitado");
    }
    
    /**
     * Pauses a campaign
     */
    @Transactional
    public AutomationCampaignDto pauseCampaign(Long campaignId) {
        log.info("Pausing campaign: {}", campaignId);
        
        // Implementação temporária sem mapper
        throw new UnsupportedOperationException("Mapper temporariamente desabilitado");
    }
    
    /**
     * Completes a campaign
     */
    @Transactional
    public AutomationCampaignDto completeCampaign(Long campaignId) {
        log.info("Completing campaign: {}", campaignId);
        
        // Implementação temporária sem mapper
        throw new UnsupportedOperationException("Mapper temporariamente desabilitado");
    }
    
    /**
     * Cancels a campaign
     */
    @Transactional
    public AutomationCampaignDto cancelCampaign(Long campaignId) {
        log.info("Cancelling campaign: {}", campaignId);
        
        // Implementação temporária sem mapper
        throw new UnsupportedOperationException("Mapper temporariamente desabilitado");
    }
    
    /**
     * Gets campaign by ID
     */
    @Transactional(readOnly = true)
    public AutomationCampaignDto getCampaignById(Long campaignId) {
        log.debug("Getting campaign by ID: {}", campaignId);
        
        // Implementação temporária sem mapper
        throw new UnsupportedOperationException("Mapper temporariamente desabilitado");
    }
    
    /**
     * Gets campaigns by company ID
     */
    @Transactional(readOnly = true)
    public List<AutomationCampaignDto> getCampaignsByCompany(Long companyId) {
        log.debug("Getting campaigns by company: {}", companyId);
        
        // Implementação temporária sem mapper
        throw new UnsupportedOperationException("Mapper temporariamente desabilitado");
    }
    
    /**
     * Gets campaigns by status
     */
    @Transactional(readOnly = true)
    public List<AutomationCampaignDto> getCampaignsByStatus(String status) {
        log.debug("Getting campaigns by status: {}", status);
        
        // Implementação temporária sem mapper
        throw new UnsupportedOperationException("Mapper temporariamente desabilitado");
    }
    
    /**
     * Gets active campaigns
     */
    @Transactional(readOnly = true)
    public List<AutomationCampaignDto> getActiveCampaigns() {
        log.debug("Getting active campaigns");
        
        // Implementação temporária sem mapper
        throw new UnsupportedOperationException("Mapper temporariamente desabilitado");
    }
    
    /**
     * Gets campaign executions
     */
    @Transactional(readOnly = true)
    public List<CampaignExecutionDto> getCampaignExecutions(Long campaignId) {
        log.debug("Getting executions for campaign: {}", campaignId);
        
        // Implementação temporária sem mapper
        throw new UnsupportedOperationException("Mapper temporariamente desabilitado");
    }
    
    /**
     * Updates campaign metrics
     */
    @Transactional
    public AutomationCampaignDto updateCampaignMetrics(Long campaignId) {
        log.info("Updating metrics for campaign: {}", campaignId);
        
        // Implementação temporária sem mapper
        throw new UnsupportedOperationException("Mapper temporariamente desabilitado");
    }
    
    /**
     * Gets campaigns with pagination
     */
    @Transactional(readOnly = true)
    public List<AutomationCampaignDto> getCampaignsWithPagination(Long companyId, int page, int size) {
        log.debug("Getting campaigns with pagination - company: {}, page: {}, size: {}", 
                  companyId, page, size);
        
        // Implementação temporária sem mapper
        throw new UnsupportedOperationException("Mapper temporariamente desabilitado");
    }
    
    /**
     * Deletes a campaign
     */
    @Transactional
    public void deleteCampaign(Long campaignId) {
        log.info("Deleting campaign: {}", campaignId);
        
        // Implementação temporária sem mapper - só validação básica
        if (campaignId == null || campaignId <= 0) {
            throw new BusinessRuleViolationException("Invalid campaign ID");
        }
        
        // Aqui normalmente buscaríamos a campanha e chamaríamos o repository
        throw new UnsupportedOperationException("Delete temporariamente desabilitado");
    }
    
    /**
     * Gets campaign statistics
     */
    @Transactional(readOnly = true)
    public CampaignStatisticsDto getCampaignStatistics(Long companyId) {
        log.debug("Getting campaign statistics for company: {}", companyId);
        
        long totalCampaigns = campaignRepository.countByCompanyId(companyId);
        long activeCampaigns = campaignRepository.countByCompanyIdAndStatus(companyId, CampaignStatus.ACTIVE);
        long completedCampaigns = campaignRepository.countByCompanyIdAndStatus(companyId, CampaignStatus.COMPLETED);
        long draftCampaigns = campaignRepository.countByCompanyIdAndStatus(companyId, CampaignStatus.DRAFT);
        
        return CampaignStatisticsDto.builder()
                .totalCampaigns(totalCampaigns)
                .activeCampaigns(activeCampaigns)
                .completedCampaigns(completedCampaigns)
                .draftCampaigns(draftCampaigns)
                .build();
    }
    
    /**
     * Gets campaign by code
     */
    @Transactional(readOnly = true)
    public AutomationCampaignDto getCampaignByCode(String campaignCode) {
        log.debug("Getting campaign by code: {}", campaignCode);
        
        // Implementação temporária sem mapper
        throw new UnsupportedOperationException("Mapper temporariamente desabilitado");
    }
    
    /**
     * Gets campaigns with filtering and pagination
     */
    @Transactional(readOnly = true)
    public Page<AutomationCampaignDto> getCampaigns(Long companyId, CampaignStatus status, 
                                                   CampaignType type, Long socialAccountId, 
                                                   Pageable pageable) {
        log.debug("Getting campaigns with filters - company: {}, status: {}, type: {}, socialAccount: {}", 
                  companyId, status, type, socialAccountId);
        
        // Implementação temporária sem mapper
        throw new UnsupportedOperationException("Mapper temporariamente desabilitado");
    }
    
    /**
     * Updates a campaign
     */
    @Transactional
    public AutomationCampaignDto updateCampaign(Long campaignId, AutomationCampaignDto campaignDto) {
        log.info("Updating campaign: {}", campaignId);
        
        // Implementação temporária sem mapper
        throw new UnsupportedOperationException("Mapper temporariamente desabilitado");
    }
    
    /**
     * Resumes a campaign
     */
    @Transactional
    public AutomationCampaignDto resumeCampaign(Long campaignId) {
        log.info("Resuming campaign: {}", campaignId);
        
        // Implementação temporária sem mapper
        throw new UnsupportedOperationException("Mapper temporariamente desabilitado");
    }
    
    /**
     * Gets campaign executions with pagination
     */
    @Transactional(readOnly = true)
    public Page<CampaignExecutionDto> getCampaignExecutions(Long campaignId, Pageable pageable) {
        log.debug("Getting executions for campaign: {} with pagination", campaignId);
        
        // Implementação temporária sem mapper
        throw new UnsupportedOperationException("Mapper temporariamente desabilitado");
    }
    
    /**
     * Gets company statistics
     */
    @Transactional(readOnly = true)
    public Map<String, Object> getCompanyStatistics(Long companyId) {
        log.debug("Getting company statistics for: {}", companyId);
        
        CampaignStatisticsDto stats = getCampaignStatistics(companyId);
        return Map.of(
                "totalCampaigns", stats.totalCampaigns(),
                "activeCampaigns", stats.activeCampaigns(),
                "completedCampaigns", stats.completedCampaigns(),
                "draftCampaigns", stats.draftCampaigns()
        );
    }
    
    /**
     * Gets campaigns ready to start
     */
    @Transactional(readOnly = true)
    public List<AutomationCampaignDto> getCampaignsReadyToStart() {
        log.debug("Getting campaigns ready to start");
        
        // Implementação temporária sem mapper
        throw new UnsupportedOperationException("Mapper temporariamente desabilitado");
    }
    
    /**
     * Gets campaigns ready to end
     */
    @Transactional(readOnly = true)
    public List<AutomationCampaignDto> getCampaignsReadyToEnd() {
        log.debug("Getting campaigns ready to end");
        
        // Implementação temporária sem mapper
        throw new UnsupportedOperationException("Mapper temporariamente desabilitado");
    }
    
    // DTO for statistics
    public record CampaignStatisticsDto(
            long totalCampaigns,
            long activeCampaigns,
            long completedCampaigns,
            long draftCampaigns
    ) {
        public static CampaignStatisticsDtoBuilder builder() {
            return new CampaignStatisticsDtoBuilder();
        }
        
        public static class CampaignStatisticsDtoBuilder {
            private long totalCampaigns;
            private long activeCampaigns;
            private long completedCampaigns;
            private long draftCampaigns;
            
            public CampaignStatisticsDtoBuilder totalCampaigns(long totalCampaigns) {
                this.totalCampaigns = totalCampaigns;
                return this;
            }
            
            public CampaignStatisticsDtoBuilder activeCampaigns(long activeCampaigns) {
                this.activeCampaigns = activeCampaigns;
                return this;
            }
            
            public CampaignStatisticsDtoBuilder completedCampaigns(long completedCampaigns) {
                this.completedCampaigns = completedCampaigns;
                return this;
            }
            
            public CampaignStatisticsDtoBuilder draftCampaigns(long draftCampaigns) {
                this.draftCampaigns = draftCampaigns;
                return this;
            }
            
            public CampaignStatisticsDto build() {
                return new CampaignStatisticsDto(totalCampaigns, activeCampaigns, completedCampaigns, draftCampaigns);
            }
        }
    }
}