package com.estate.expert.admin.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.deepoove.poi.XWPFTemplate;
import com.estate.expert.admin.domain.business.device.usage.DeviceUsage;
import com.estate.expert.admin.domain.exam.eval.fuzzy.EvalFuzzyResult;
import com.estate.expert.admin.domain.exam.eval.score.EvalScoreResult;
import com.estate.expert.admin.domain.exam.record.error.ErrorRecordRepository;
import com.estate.expert.admin.domain.exam.task.check.CheckTask;
import com.estate.expert.admin.domain.exam.task.check.CheckTaskRepository;
import com.estate.expert.admin.domain.report.ReportTemplate;
import com.estate.expert.admin.domain.plan.PlanState;
import com.estate.expert.admin.enums.BizResultCode;
import com.estate.expert.admin.service.*;
import com.estate.expert.admin.service.eval.EvalFuzzyService;
import com.estate.expert.admin.service.eval.EvalScoreService;
import com.estate.expert.admin.stat.report.builder.DeviceReportBuilder;
import com.estate.expert.admin.stat.report.builder.ReportBuilderBase;
import com.estate.expert.admin.stat.report.builder.SystemReportBuilder;
import com.estate.expert.admin.stat.report.data.DeviceReportData;
import com.estate.expert.admin.stat.report.data.impl.DeviceFuzzyReportData;
import com.estate.expert.admin.stat.report.data.impl.DeviceScoreReportData;
import com.estate.expert.admin.stat.report.data.impl.SystemFuzzyReportData;
import com.estate.expert.admin.stat.report.data.impl.SystemScoreReportData;
import com.estate.expert.common.exception.BizException;
import fr.opensagres.poi.xwpf.converter.pdf.PdfConverter;
import fr.opensagres.poi.xwpf.converter.pdf.PdfOptions;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.OutputStream;
import java.util.Collections;
import java.util.HashSet;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

/**
 * 报告数据服务实现类
 **/
@Slf4j
@Service
public class ReportServiceImpl implements ReportService {

    @Resource
    private ReportTemplateService reportTemplateService;

    @Resource
    private ProjectInfoService projectInfoService;

    @Resource
    private DeviceUsageService deviceUsageService;

    @Resource
    private EvalFuzzyService evalFuzzyService;

    @Resource
    private EvalScoreService evalScoreService;

    @Resource
    private ErrorRecordService errorRecordService;

    @Resource
    private ErrorRecordRepository errorRecordRepository;

    @Resource
    private CheckTaskRepository checkTaskRepository;

    @Resource
    private DeviceService deviceService;

    @Resource
    private UserFileService userFileService;

    @Override
    public JSONObject fuzzyReportData(Integer checkTaskId, Integer templateId) {
        var evalFuzzyResult = evalFuzzyService.getByCheckTaskId(checkTaskId);
        BizResultCode.EVAL_FUZZY_RESULT_NOT_EXIST.check(evalFuzzyResult == null);

        var evalScoreResult =  evalScoreService.getByCheckTaskId(checkTaskId);
        BizResultCode.EVAL_SCORE_RESULT_NOT_EXIST.check(evalScoreResult == null);

        var reportTemplate = reportTemplateService.get(templateId);
        BizResultCode.BIZ_REPORT_TEMPLATE_NOT_EXIST.check(reportTemplate == null);

        switch (reportTemplate.getType()) {
            case ThirdPartyReport:
                return buildFuzzySystemReportData(evalFuzzyResult, evalScoreResult, reportTemplate);
            case DeviceReport:
                return buildFuzzyDeviceReportData(evalFuzzyResult, evalScoreResult, reportTemplate);
            default:
                throw new BizException(BizResultCode.BIZ_REPORT_TEMPLATE_TYPE_NOT_EXIST);
        }
    }

    @Override
    public JSONObject scoreReportData(Integer checkTaskId, Integer templateId) {
        var evalFuzzyResult = evalFuzzyService.getByCheckTaskId(checkTaskId);
        BizResultCode.EVAL_FUZZY_RESULT_NOT_EXIST.check(evalFuzzyResult == null);

        var evalScoreResult =  evalScoreService.getByCheckTaskId(checkTaskId);
        BizResultCode.EVAL_SCORE_RESULT_NOT_EXIST.check(evalScoreResult == null);

        var reportTemplate = reportTemplateService.get(templateId);
        BizResultCode.BIZ_REPORT_TEMPLATE_NOT_EXIST.check(reportTemplate == null);

        switch (reportTemplate.getType()) {
            case ThirdPartyReport:
                return buildScoreSystemReportData(evalFuzzyResult, evalScoreResult, reportTemplate);
            case DeviceReport:
                return buildScoreDeviceReportData(evalFuzzyResult, evalScoreResult, reportTemplate);
            default:
                throw new BizException(BizResultCode.BIZ_REPORT_TEMPLATE_TYPE_NOT_EXIST);
        }
    }

    @Override
    public XWPFTemplate fuzzyReport(Integer checkTaskId, Integer templateId) {
        var reportData = fuzzyReportData(checkTaskId, templateId);
        var builder = getReportBuilder(templateId);
        var template = reportTemplateService.get(templateId);

        // reportData to JSONObject
        return builder.buildReport(reportData, template.getConfig());
    }

    @Override
    public XWPFTemplate scoreReport(Integer checkTaskId, Integer templateId) {
        var reportData = scoreReportData(checkTaskId, templateId);
        var builder = getReportBuilder(templateId);
        var template = reportTemplateService.get(templateId);

        // reportData to JSONObject
        return builder.buildReport(reportData, template.getConfig());
    }

    @Override
    public void fuzzyReportPdf(Integer checkTaskId, Integer templateId, OutputStream outputStream) {
        try (var doc = fuzzyReport(checkTaskId, templateId)) {
            convertToPdf(doc, outputStream);
        } catch (Exception e) {
            log.error("生成模糊评价PDF报告失败", e);
            throw new BizException("生成模糊评价PDF报告失败");
        }
    }

    @Override
    public void scoreReportPdf(Integer checkTaskId, Integer templateId, OutputStream outputStream) {
        try (var doc = scoreReport(checkTaskId, templateId)) {
            convertToPdf(doc, outputStream);
        } catch (Exception e) {
            log.error("生成打分评价PDF报告失败", e);
            throw new BizException("生成打分评价PDF报告失败");
        }
    }

    /**
     * 将Word文档转换为PDF
     * @param template Word模板
     * @param outputStream 输出流
     */
    private void convertToPdf(XWPFTemplate template, OutputStream outputStream) throws Exception {
        // 先将Word模板写入字节数组
        ByteArrayOutputStream docOutputStream = new ByteArrayOutputStream();
        template.write(docOutputStream);

        // 从字节数组读取Word文档
        ByteArrayInputStream docInputStream = new ByteArrayInputStream(docOutputStream.toByteArray());
        org.apache.poi.xwpf.usermodel.XWPFDocument document = new org.apache.poi.xwpf.usermodel.XWPFDocument(docInputStream);

        // 转换为PDF
        PdfOptions options = PdfOptions.create();
        PdfConverter.getInstance().convert(document, outputStream, options);

        // 关闭资源
        document.close();
        docInputStream.close();
        docOutputStream.close();
    }

    private ReportBuilderBase getReportBuilder(Integer templateId) {
        var reportTemplate = reportTemplateService.get(templateId);
        BizResultCode.BIZ_REPORT_TEMPLATE_NOT_EXIST.check(reportTemplate == null);
        switch (reportTemplate.getType()) {
            case ThirdPartyReport:
                return new SystemReportBuilder(userFileService);
            case DeviceReport:
                return new DeviceReportBuilder(userFileService);
            default:
                throw new BizException(BizResultCode.BIZ_REPORT_TEMPLATE_TYPE_NOT_EXIST);
        }
    }

    private JSONObject buildFuzzySystemReportData(EvalFuzzyResult evalFuzzyResult, EvalScoreResult scoreResult, ReportTemplate reportTemplate) {
        // 查询必须要的数据
        var records = errorRecordService.listSystemErrors(evalFuzzyResult.getTask().getId());
        var project = evalFuzzyResult.getProject();
        var projectInfo = evalFuzzyResult.getTask().getProjectInfo();
//        var projectInfo = projectInfoService.getByCheckTaskId(evalFuzzyResult.getTask().getId());
        var deviceUsages = deviceUsageService.listUsages(project.getId(), null);
        var devices= deviceUsages.stream().map(DeviceUsage::getDevice).toList();
        var hierarchy = evalFuzzyResult.getPlan().getSystemScoreExpert().getModel().getHierarchy().getContent();

        var problemFrequency = buildSystemProblemFrequency(project.getId(), records);
        var projectCheckCount = countProjectChecks(project.getId());

        // 生成报告数据
        return SystemFuzzyReportData.builder()
                .reportId(evalFuzzyResult.getId())
                .systemHierarchy(hierarchy)
                .sysResult(evalFuzzyResult.getSystemRes())
                .scoreResult(scoreResult.getSystemRes())
                .template(reportTemplate)
                .project(project)
                .projectInfo(projectInfo)
                .devices(devices)
                .records(records)
                .problemHazardCounts(problemFrequency.problemHazardCounts())
                .projectCheckCount(projectCheckCount)
                .build()
                .generate();
    }

    private JSONObject buildScoreSystemReportData(EvalFuzzyResult evalFuzzyResult, EvalScoreResult scoreResult, ReportTemplate reportTemplate) {
        // 查询必须要的数据
        var records = errorRecordService.listSystemErrors(evalFuzzyResult.getTask().getId());
        var project = evalFuzzyResult.getProject();
//        var projectInfo = projectInfoService.latest(evalFuzzyResult.getProject().getId());
        var projectInfo = evalFuzzyResult.getTask().getProjectInfo();
        var deviceUsages = deviceUsageService.listUsages(project.getId(), null);
        var devices= deviceUsages.stream().map(DeviceUsage::getDevice).toList();
        var hierarchy = evalFuzzyResult.getPlan().getSystemScoreExpert().getModel().getHierarchy().getContent();

        var problemFrequency = buildSystemProblemFrequency(project.getId(), records);
        var projectCheckCount = countProjectChecks(project.getId());

        // 生成报告数据
        return SystemScoreReportData.builder()
                .reportId(evalFuzzyResult.getId())
                .systemHierarchy(hierarchy)
                .sysResult(evalFuzzyResult.getSystemRes())
                .scoreResult(scoreResult.getSystemRes())
                .template(reportTemplate)
                .project(project)
                .projectInfo(projectInfo)
                .devices(devices)
                .records(records)
                .problemHazardCounts(problemFrequency.problemHazardCounts())
                .projectCheckCount(projectCheckCount)
                .build()
                .generate();
    }

    private record ProblemFrequency(Map<Integer, Long> problemHazardCounts) {
    }

    private record DeviceProblemFrequency(Map<String, Long> problemHazardCounts, Map<Integer, Long> deviceCheckCounts) {
    }

    private ProblemFrequency buildSystemProblemFrequency(Integer projectId, List<com.estate.expert.admin.domain.exam.record.error.ErrorRecord> currentTaskRecords) {
        if (projectId == null || currentTaskRecords == null || currentTaskRecords.isEmpty()) {
            return new ProblemFrequency(Collections.emptyMap());
        }

        var problemIds = currentTaskRecords.stream()
                .map(r -> r.getProblem() != null ? r.getProblem().getId() : null)
                .filter(java.util.Objects::nonNull)
                .distinct()
                .toList();
        if (problemIds.isEmpty()) {
            return new ProblemFrequency(Collections.emptyMap());
        }

        var taskIds = checkTaskRepository.listTaskIdsByProjectAndPlanState(projectId, PlanState.COMPLETE);
        if (taskIds == null || taskIds.isEmpty()) {
            return new ProblemFrequency(Collections.emptyMap());
        }

        Map<Integer, Long> hazardCounts = new HashMap<>();
        for (var row : errorRecordRepository.countSystemHazardsByTaskIdsAndProblemIds(taskIds, problemIds)) {
            if (row == null || row.length < 2 || row[0] == null || row[1] == null) {
                continue;
            }
            hazardCounts.put(((Number) row[0]).intValue(), ((Number) row[1]).longValue());
        }

        return new ProblemFrequency(hazardCounts);
    }

    private DeviceProblemFrequency buildDeviceProblemFrequency(Integer projectId, Integer clientId) {
        var taskIds = listTaskIdsByProjectAndClient(projectId, clientId);
        if (taskIds.isEmpty()) {
            return new DeviceProblemFrequency(Collections.emptyMap(), Collections.emptyMap());
        }

        Map<String, Long> hazardCounts = new HashMap<>();
        for (var row : errorRecordRepository.countDeviceHazardsByTaskIds(taskIds)) {
            collectDeviceProblemFrequency(row, hazardCounts);
        }

        Map<Integer, Long> deviceCheckCounts = buildDeviceCheckFrequencyByCompletedTasks(projectId, clientId);

        return new DeviceProblemFrequency(hazardCounts, deviceCheckCounts);
    }

    private void collectDeviceProblemFrequency(Object[] row, Map<String, Long> target) {
        if (row == null || row.length < 3 || row[0] == null || row[2] == null) {
            return;
        }
        Integer deviceId = ((Number) row[0]).intValue();
        Integer problemId = row[1] == null ? null : ((Number) row[1]).intValue();
        Long count = ((Number) row[2]).longValue();
        target.put(DeviceReportData.buildDeviceProblemKey(deviceId, problemId), count);
    }

    private Map<Integer, Long> buildDeviceCheckFrequencyByCompletedTasks(Integer projectId, Integer clientId) {
        if (projectId == null || clientId == null) {
            return Collections.emptyMap();
        }
        var tasks = checkTaskRepository.listClosedByProjectAndClient(projectId, clientId);
        if (tasks == null || tasks.isEmpty()) {
            return Collections.emptyMap();
        }
        Map<Integer, Long> deviceCheckCounts = new HashMap<>();
        for (CheckTask task : tasks) {
            for (Integer deviceId : collectTaskCheckedDeviceIds(task)) {
                deviceCheckCounts.merge(deviceId, 1L, Long::sum);
            }
        }
        return deviceCheckCounts;
    }

    private Set<Integer> collectTaskCheckedDeviceIds(CheckTask task) {
        Set<Integer> deviceIds = new HashSet<>();
        if (task == null) {
            return deviceIds;
        }
        addDeviceIds(task.getDeviceFuzzyMap(), deviceIds);
        addDeviceIds(task.getDeviceScoreMap(), deviceIds);
        return deviceIds;
    }

    private void addDeviceIds(Map<Integer, Float> deviceMap, Set<Integer> target) {
        if (deviceMap == null || deviceMap.isEmpty()) {
            return;
        }
        for (Integer deviceId : deviceMap.keySet()) {
            if (deviceId == null) {
                continue;
            }
            target.add(deviceId);
        }
    }

    private JSONObject buildFuzzyDeviceReportData(EvalFuzzyResult evalFuzzyResult, EvalScoreResult scoreResult,  ReportTemplate reportTemplate) {
        var records = errorRecordService.listDeviceErrors(evalFuzzyResult.getTask().getId());
        var project = evalFuzzyResult.getProject();
        var projectInfo = evalFuzzyResult.getTask().getProjectInfo();
//        var projectInfo = projectInfoService.getByCheckTaskId(evalFuzzyResult.getTask().getId());
        var deviceIds = evalFuzzyResult.getDeviceResMap().keySet();
        var devices = deviceService.findAllById(deviceIds);
        var hierarchy = evalFuzzyResult.getPlan().getDeviceScoreExpert().getModel().getHierarchy().getContent();
        var clientId = project.getClient() != null ? project.getClient().getId() : null;
        var problemFrequency = buildDeviceProblemFrequency(project.getId(), clientId);

        // 生成报告数据
        return DeviceFuzzyReportData.builder()
                .reportId(evalFuzzyResult.getId())
                .deviceResMap(evalFuzzyResult.getDeviceResMap())
                .deviceHierarchy(hierarchy)
                .template(reportTemplate)
                .project(project)
                .projectInfo(projectInfo)
                .devices(devices)
                .records(records)
                .deviceProblemHazardCounts(problemFrequency.problemHazardCounts())
                .deviceCheckCounts(problemFrequency.deviceCheckCounts())
                .build()
                .generate();
    }

    private JSONObject buildScoreDeviceReportData(EvalFuzzyResult evalFuzzyResult, EvalScoreResult evalScoreResult, ReportTemplate reportTemplate) {
        var records = errorRecordService.listDeviceErrors(evalFuzzyResult.getTask().getId());
        var project = evalFuzzyResult.getProject();
//        var projectInfo = projectInfoService.getByCheckTaskId(evalFuzzyResult.getTask().getId());
        var projectInfo = evalFuzzyResult.getTask().getProjectInfo();
        var deviceIds = evalFuzzyResult.getDeviceResMap().keySet();
        var devices = deviceService.findAllById(deviceIds);
        var hierarchy = evalFuzzyResult.getPlan().getDeviceScoreExpert().getModel().getHierarchy().getContent();
        var clientId = project.getClient() != null ? project.getClient().getId() : null;
        var problemFrequency = buildDeviceProblemFrequency(project.getId(), clientId);

        // 生成报告数据
        return DeviceScoreReportData.builder()
                .reportId(evalFuzzyResult.getId())
                .deviceResMap(evalFuzzyResult.getDeviceResMap())
                .deviceScoreResMap(evalScoreResult.getDeviceResMap())
                .deviceHierarchy(hierarchy)
                .template(reportTemplate)
                .project(project)
                .projectInfo(projectInfo)
                .devices(devices)
                .records(records)
                .deviceProblemHazardCounts(problemFrequency.problemHazardCounts())
                .deviceCheckCounts(problemFrequency.deviceCheckCounts())
                .build()
                .generate();
    }

    private List<Integer> listTaskIdsByProjectAndClient(Integer projectId, Integer clientId) {
        if (projectId == null || clientId == null) {
            return Collections.emptyList();
        }
        var taskIds = checkTaskRepository.listTaskIdsByProjectAndClient(projectId, clientId);
        if (taskIds == null) {
            return Collections.emptyList();
        }
        return taskIds;
    }

    private long countProjectChecks(Integer projectId) {
        if (projectId == null) {
            return 0L;
        }
        var taskIds = checkTaskRepository.listTaskIdsByProjectAndPlanState(projectId, PlanState.COMPLETE);
        if (taskIds == null) {
            return 0L;
        }
        return taskIds.size();
    }

}