import { Cvss3P1 } from 'ae-cvss-calculator';
import { t } from 'i18next';
import { useEffect, useState } from 'react';

import Card from '@/components/card/Card';
import { CIATriadChart } from '@/components/charts/CIATriadChart';
import { CVSSChart } from '@/components/charts/CVSSChart';
import { CWECloud } from '@/components/charts/CWECloud';
import { RemediationPriorityChart } from '@/components/charts/RemediationPriorityChart';
import { SeverityPieChart } from '@/components/charts/SeverityPieChart';
import { TimePerAuditChart } from '@/components/charts/TimePerAuditChart';
import SelectDropdown from '@/components/dropdown/SelectDropdown';
import { getAuditById } from '@/services/audits';
import { getAuditsByClientName } from '@/services/clients';
import { getCompanies } from '@/services/data';

type ListItem = {
  id: number;
  value: string;
  label?: string;
};

const cvssStringTo = (
  field: 'integrity' | 'availability' | 'confidentiality',
  cvssVector: string,
) => {
  const values: Record<string, number> = { H: 2, L: 1, N: 0 } as const;
  const substrings = {
    confidentiality: 35,
    integrity: 39,
    availability: 43,
  } as const;
  return values[cvssVector.substring(substrings[field], substrings[field] + 1)];
};

const cvssStringToScore = (cvssScore: string) => {
  try {
    const cvssVector = new Cvss3P1(cvssScore);
    return cvssVector.calculateExactOverallScore();
  } catch (error) {
    console.error('Invalid CVSS vector:', error);
  }
  return 0;
};

const severityByScore = (score: number) => {
  if (score >= 9.0) {
    return 0;
  } else if (score >= 7.0) {
    return 1;
  } else if (score >= 4.0) {
    return 2;
  } else if (score >= 0.1) {
    return 3;
  } else {
    return 4;
  }
};

export const ClientDashboard = () => {
  const [clientName, setClientName] = useState<ListItem[]>([]);
  const [totalSeverity, setTotalSeverity] = useState(0);
  const [currentClient, setCurrentClient] = useState<ListItem | null>(null);
  const [severityData, setSeverityData] = useState<
    { name: string; value: number; color: string }[]
  >([
    { name: 'Critical', value: 0, color: '#dc3545' },
    { name: 'High', value: 0, color: '#fd7e14' },
    { name: 'Medium', value: 0, color: '#ffc107' },
    { name: 'Low', value: 0, color: '#28a745' },
    { name: 'Informative', value: 0, color: '#6c757d' },
  ]);
  const [cweItems, setCweItems] = useState<{ id: string; size: number }[]>([]);
  const [timeData, setTimeData] = useState<
    {
      name: string;
      execution: number;
      remediation: number;
    }[]
  >([]);
  const [ciaData, setCiaData] = useState<
    {
      subject: string;
      current: 0 | 1 | 2;
      target: 0 | 1 | 2;
    }[]
  >([
    { subject: 'Confidentiality', current: 0, target: 0 },
    { subject: 'Integrity', current: 0, target: 0 },
    { subject: 'Availability', current: 0, target: 0 },
  ]);
  const [cvssData, setCvssData] = useState<
    {
      name: string;
      score: number;
    }[]
  >([]);
  const [priorityData, setPriorityData] = useState<
    {
      name: string;
      count: number;
      color: string;
    }[]
  >([
    { name: 'Low', count: 0, color: '#28a745' },
    { name: 'Medium', count: 0, color: '#ffc107' },
    { name: 'High', count: 0, color: '#fd7e14' },
    { name: 'Urgent', count: 0, color: '#dc3545' },
  ]);
  const fetchClients = async () => {
    try {
      const data = await getCompanies();
      const clientName: ListItem[] = data.datas.map((cliente, index) => ({
        id: index,
        value: cliente.name,
      }));
      setClientName(clientName);
    } catch (error) {
      console.error('Error fetching audits:', error);
    }
  };

  useEffect(() => {
    fetchClients().catch(console.error);
    if (currentClient === null) {
      return;
    }

    const fetchAuditsbyClient = async () => {
      try {
        const data = await getAuditsByClientName(currentClient.value);
        const tmpCiaData: {
          subject: string;
          current: 0 | 1 | 2;
          target: 0 | 1 | 2;
        }[] = [
          { subject: 'Confidentiality', current: 0, target: 0 },
          { subject: 'Integrity', current: 0, target: 0 },
          { subject: 'Availability', current: 0, target: 0 },
        ];
        let findingcount = 0;
        let prioritycount = 0;
        const tmpCvssData: { name: string; score: number }[] = [];
        const tmpPriorityData: {
          name: string;
          count: number;
          color: string;
        }[] = [
          { name: 'Low', count: 0, color: '#28a745' },
          { name: 'Medium', count: 0, color: '#ffc107' },
          { name: 'High', count: 0, color: '#fd7e14' },
          { name: 'Urgent', count: 0, color: '#dc3545' },
        ];
        const tmpSeverityData = [
          { name: 'Critical', value: 0, color: '#dc3545' },
          { name: 'High', value: 0, color: '#fd7e14' },
          { name: 'Medium', value: 0, color: '#ffc107' },
          { name: 'Low', value: 0, color: '#28a745' },
          { name: 'Informative', value: 0, color: '#6c757d' },
        ];
        const tmpCweItems: { id: string; size: number }[] = [];
        const tmpTimeData: {
          name: string;
          execution: number;
          remediation: number;
        }[] = [];

        let cvssCount = 0;
        let cvssScores = 0;
        const auditPromises = data.map(async audit => {
          const auditData = await getAuditById(audit._id);
          cvssCount = 0;
          cvssScores = 0;
          tmpTimeData.push({
            name: auditData.datas.name,
            execution:
              (new Date(auditData.datas.date_end).getTime() -
                new Date(auditData.datas.date_start).getTime()) /
              (1000 * 60 * 60 * 24),
            remediation:
              (new Date(auditData.datas.date).getTime() -
                new Date(auditData.datas.date_end).getTime()) /
              (1000 * 60 * 60 * 24),
          });

          auditData.datas.findings.forEach(finding => {
            // severity data
            const severity = severityByScore(
              cvssStringToScore(finding.cvssv3 ?? ''),
            );
            tmpSeverityData[severity].value += 1;

            // cwe data
            finding.cwes.forEach(cwe => {
              const cweItem = tmpCweItems.find(item => item.id === cwe);
              if (cweItem) {
                tmpCweItems.forEach(item => {
                  if (item.id === cwe) {
                    item.size += 1;
                  }
                });
              } else {
                tmpCweItems.push({ id: cwe, size: 1 });
              }
            });

            // cia data and cvss data and priority data
            if (finding.cvssv3?.length == 44) {
              tmpCiaData[0].current += cvssStringTo(
                'confidentiality',
                finding.cvssv3,
              );
              tmpCiaData[1].current += cvssStringTo(
                'integrity',
                finding.cvssv3,
              );
              tmpCiaData[2].current += cvssStringTo(
                'availability',
                finding.cvssv3,
              );
              findingcount += 1;

              cvssScores += cvssStringToScore(finding.cvssv3);
              cvssCount += 1;
              const priority = finding.priority;
              if (priority !== undefined) {
                tmpPriorityData[priority - 1].count += 1;
                prioritycount += 1;
              }
            }
          });
          if (cvssCount > 0) {
            tmpCvssData.push({
              name: auditData.datas.name,
              score: cvssScores / cvssCount,
            });
          }
        });

        await Promise.all(auditPromises);

        if (findingcount > 0) {
          tmpCiaData.forEach(item => {
            item.current /= findingcount;
          });
        }

        if (prioritycount > 0) {
          tmpPriorityData.forEach(item => {
            item.count /= prioritycount;
          });
        }

        setTimeData(tmpTimeData);
        setSeverityData(tmpSeverityData);
        setTotalSeverity(
          tmpSeverityData.reduce((acc, item) => acc + item.value, 0),
        );
        setPriorityData(tmpPriorityData);
        setCvssData(tmpCvssData);
        setCweItems(tmpCweItems);
        setCiaData(tmpCiaData);
      } catch (error) {
        console.error('Error fetching audits:', error);
      }
    };

    fetchAuditsbyClient().catch(console.error);
  }, [currentClient]);

  return (
    <div className="p-8 h-screen overflow-y-auto">
      <Card title="Client">
        <SelectDropdown
          items={clientName}
          onChange={setCurrentClient}
          placeholder={t('clientSelect')}
          selected={currentClient}
          title=""
        />
      </Card>

      {currentClient === null ? null : (
        <div className="grid grid-cols-1 md:grid-cols-2 gap-6 mt-8">
          <Card title={t('vulnBySeverity')}>
            <SeverityPieChart data={severityData} total={totalSeverity} />
          </Card>
          <Card title={t('timesPerAudit')}>
            <TimePerAuditChart
              data={timeData.filter(d => d.execution > 0 || d.remediation > 0)}
            />
          </Card>
          <Card title={t('cwesFound')}>
            <CWECloud
              items={cweItems}
              mostCommon={cweItems.sort((a, b) => b.size - a.size)[0]?.id}
            />
          </Card>
          <Card title={t('averageCiaTriad')}>
            <CIATriadChart data={ciaData} />
          </Card>
          <Card title={t('averageCvss')}>
            <CVSSChart data={cvssData} />
          </Card>
          <Card title={t('averageRemediationPriority')}>
            <RemediationPriorityChart data={priorityData} />
          </Card>
        </div>
      )}
    </div>
  );
};