import React, { useEffect, useMemo, useState } from "react";

import {
  Box,
  Button,
  Chip,
  CircularProgress,
  Dialog,
  DialogContent,
  DialogTitle,
  FormControl,
  InputLabel,
  MenuItem,
  Select,
  Tab,
  Tabs,
  TextField,
  Typography,
} from "@mui/material";

import { api, getApiErrorMessage } from "../api";
import { ApplicationPackageResponse, CandidateFit, InterviewPrepResponse, JobApplication, ReadinessResponse } from "../types";
import { useToast } from "../toast";
import { useDialogActions } from "../dialogs";

import Correspondence from "./Correspondence";
import Attachments from "./Attachments";
import JobFlowBar from "./JobFlowBar";
import { useI18n } from "../i18n/I18nProvider";

type FollowUpDraft = {
  subject: string;
  body: string;
  reason: string;
  suggestedSendOn: string;
};

type GenerationMode = "default" | "concise" | "ats" | "achievement" | "interview";

interface Props {
  open: boolean;
  jobId: number | null;
  onClose: () => void;
  initialTab?: number;
}

function statusChipColor(status: string): "default" | "primary" | "warning" | "error" | "success" {
  switch (status) {
    case "Rejected":
      return "error";
    case "Waiting":
    case "Ghosted":
      return "warning";
    case "Offer":
      return "success";
    case "Applied":
    default:
      return "primary";
  }
}

function getFitLevel(candidateFit: CandidateFit | null): { label: string; color: "success" | "warning" | "default" } | null {
  if (!candidateFit) return null;
  if (candidateFit.fitLevel === "Strong match") return { label: candidateFit.fitLevel, color: "success" };
  if (candidateFit.fitLevel === "Potential match") return { label: candidateFit.fitLevel, color: "warning" };
  return { label: candidateFit.fitLevel, color: "default" };
}

function copyLines(items: string[]) {
  return navigator.clipboard.writeText(items.map((item) => `• ${item}`).join("\n"));
}

export default function JobDetailsDialog({ open, jobId, onClose, initialTab = 0 }: Props) {
  const { toast } = useToast();
  const { t } = useI18n();
  const { confirmAction } = useDialogActions();

  const [job, setJob] = useState<JobApplication | null>(null);
  const [tab, setTab] = useState(0);
  const [history, setHistory] = useState<{ id: number; type: string; oldValue?: string; newValue?: string; note?: string; at: string }[]>([]);
  const [isAdmin, setIsAdmin] = useState(false);
  const [followUpDraft, setFollowUpDraft] = useState<FollowUpDraft | null>(null);
  const [loadingDraft, setLoadingDraft] = useState(false);
  const [sendingDraft, setSendingDraft] = useState(false);
  const [refreshingAi, setRefreshingAi] = useState(false);
  const [candidateFit, setCandidateFit] = useState<CandidateFit | null>(null);
  const [loadingCandidateFit, setLoadingCandidateFit] = useState(false);
  const [interviewPrep, setInterviewPrep] = useState<InterviewPrepResponse | null>(null);
  const [loadingInterviewPrep, setLoadingInterviewPrep] = useState(false);
  const [readiness, setReadiness] = useState<ReadinessResponse | null>(null);
  const [loadingReadiness, setLoadingReadiness] = useState(false);
  const [savingTailoredCv, setSavingTailoredCv] = useState(false);
  const [savingApplicationDrafts, setSavingApplicationDrafts] = useState(false);
  const [generatingPackage, setGeneratingPackage] = useState(false);
  const [applicationPackage, setApplicationPackage] = useState<ApplicationPackageResponse | null>(null);
  const [generationMode, setGenerationMode] = useState<GenerationMode>("default");
  const [tailoredCvText, setTailoredCvText] = useState("");
  const [draftRecipient, setDraftRecipient] = useState("");
  const [draftSubject, setDraftSubject] = useState("");
  const [draftBody, setDraftBody] = useState("");

  useEffect(() => {
    if (!open || !jobId) return;
    setTab(Math.max(0, Math.min(8, initialTab)));
    setFollowUpDraft(null);
    setCandidateFit(null);
    setInterviewPrep(null);
    setReadiness(null);
    setApplicationPackage(null);
    api.get<JobApplication>(`/jobapplications/${jobId}`).then((r) => {
      setJob(r.data);
      setTailoredCvText(r.data.tailoredCvText ?? "");
      setDraftRecipient(r.data.company?.recruiterEmail ?? "");
    });
    api.get(`/auth/me`).then((r) => setIsAdmin(Boolean(r.data?.roles?.includes("Admin")))).catch(() => setIsAdmin(false));
    api.get(`/jobapplications/${jobId}/history`).then((r) => setHistory(r.data)).catch(() => setHistory([]));
  }, [open, jobId, initialTab]);

  useEffect(() => {
    if (!open || !jobId || tab !== 4 || followUpDraft) return;
    setLoadingDraft(true);
    api.get<FollowUpDraft>(`/jobapplications/${jobId}/followup-draft`).then((r) => {
      setFollowUpDraft(r.data);
      setDraftSubject(r.data.subject);
      setDraftBody(r.data.body);
    }).catch(() => setFollowUpDraft(null)).finally(() => setLoadingDraft(false));
  }, [open, jobId, tab, followUpDraft]);

  useEffect(() => {
    if (!open || !jobId || tab !== 5 || candidateFit) return;
    setLoadingCandidateFit(true);
    api.get<CandidateFit>(`/jobapplications/${jobId}/candidate-fit`).then((r) => setCandidateFit(r.data)).catch(() => setCandidateFit(null)).finally(() => setLoadingCandidateFit(false));
  }, [open, jobId, tab, candidateFit]);

  useEffect(() => {
    if (!open || !jobId || tab !== 6 || interviewPrep) return;
    setLoadingInterviewPrep(true);
    api.get<InterviewPrepResponse>(`/jobapplications/${jobId}/interview-prep`).then((r) => setInterviewPrep(r.data)).catch(() => setInterviewPrep(null)).finally(() => setLoadingInterviewPrep(false));
  }, [open, jobId, tab, interviewPrep]);

  useEffect(() => {
    if (!open || !jobId || tab !== 7 || readiness) return;
    setLoadingReadiness(true);
    api.get<ReadinessResponse>(`/jobapplications/${jobId}/readiness`).then((r) => setReadiness(r.data)).catch(() => setReadiness(null)).finally(() => setLoadingReadiness(false));
  }, [open, jobId, tab, readiness]);

  const tags: string[] = (() => {
    const raw = job?.tags;
    if (!raw) return [];
    try {
      const parsed = JSON.parse(raw);
      return Array.isArray(parsed) ? parsed.filter((x) => typeof x === "string") : [];
    } catch {
      return [];
    }
  })();

  const title = job ? `${job.company?.name ?? ""} - ${job.jobTitle}` : t("addJobApplication");
  const checklist = [
    job?.hasResume ? t("jobDetailsResume") : null,
    job?.hasCoverLetter ? t("jobDetailsCoverLetter") : null,
    job?.hasPortfolio ? t("jobDetailsPortfolio") : null,
    job?.hasOtherAttachment ? t("jobDetailsOther") : null,
  ].filter(Boolean).join(", ") || t("jobDetailsNotAvailable");
  const summaryFirstText = job?.fullSummary ?? job?.shortSummary ?? t("jobTableNoSummaryYet");
  const translatedDescriptionText = job?.translatedDescription?.trim() || "";
  const originalDescriptionText = job?.description?.trim() || "";
  const showTranslatedText = translatedDescriptionText.length > 0;
  const showOriginalText = originalDescriptionText.length > 0;
  const fitLevel = useMemo(() => getFitLevel(candidateFit), [candidateFit]);

  return (
    <Dialog open={open} onClose={onClose} fullWidth maxWidth="lg">
      <DialogTitle sx={{ pb: 1 }}>
        <Box sx={{ display: "flex", alignItems: "center", justifyContent: "space-between", gap: 2, flexWrap: "wrap" }}>
          <Box>
            <Typography variant="overline" sx={{ color: "text.secondary" }}>{t("jobTableOpen")}</Typography>
            <Typography variant="h6">{title}</Typography>
          </Box>
          {job && <Chip label={job.status} color={statusChipColor(job.status)} size="small" />}
        </Box>
      </DialogTitle>

      <DialogContent>
        <JobFlowBar job={job} history={history} />
        <Box sx={{ mt: 1.5, mb: 2, p: 1.5, borderRadius: 3, border: "1px solid", borderColor: "divider", backgroundColor: "background.paper" }}>
          <Typography variant="body2" sx={{ color: "text.secondary" }}>{summaryFirstText}</Typography>
        </Box>
        <Tabs value={tab} onChange={(_, v) => setTab(v)} sx={{ mb: 2 }} variant="scrollable" allowScrollButtonsMobile>
          <Tab label={t("jobTableOverview")} />
          <Tab label={t("jobDetailsTabCorrespondence")} />
          <Tab label={t("jobDetailsTabAttachments")} />
          <Tab label={t("jobDetailsTabTailoredCv")} />
          <Tab label={t("jobTableFollowUp")} />
          <Tab label={t("jobDetailsTabCandidateFit")} />
          <Tab label={t("jobDetailsTabInterviewPrep")} />
          <Tab label={t("jobTableReadiness")} />
          {isAdmin ? <Tab label={t("jobDetailsTabHistory")} /> : null}
        </Tabs>

        {tab === 0 && (
          <Box sx={{ display: "grid", gridTemplateColumns: "1fr 1fr", gap: 2 }}>
            <Box><Typography variant="overline">{t("jobDetailsDateApplied")}</Typography><Typography>{job ? new Date(job.dateApplied).toLocaleDateString() : ""}</Typography></Box>
            <Box><Typography variant="overline">{t("jobDetailsDaysSince")}</Typography><Typography>{job?.daysSince ?? ""}</Typography></Box>
            <Box><Typography variant="overline">{t("jobTableLocation")}</Typography><Typography>{job?.location ?? ""}</Typography></Box>
            <Box><Typography variant="overline">{t("jobDetailsSalary")}</Typography><Typography>{job?.salary ?? ""}</Typography></Box>
            <Box><Typography variant="overline">{t("jobDetailsNextAction")}</Typography><Typography>{job?.nextAction ?? ""}</Typography></Box>
            <Box><Typography variant="overline">{t("jobDetailsFollowUp")}</Typography><Typography>{job?.followUpAt ? new Date(job.followUpAt).toLocaleDateString() : ""}</Typography></Box>
            <Box><Typography variant="overline">{t("jobDetailsDeadline")}</Typography><Typography>{job?.deadline ? new Date(job.deadline).toLocaleDateString() : ""}</Typography></Box>
            <Box><Typography variant="overline">{t("jobDetailsTags")}</Typography><Box sx={{ display: "flex", gap: 1, flexWrap: "wrap", mt: 0.5 }}>{tags.length === 0 ? <Typography sx={{ color: "text.secondary" }}>-</Typography> : tags.map((t) => <Chip key={t} label={t} size="small" />)}</Box></Box>
            <Box sx={{ gridColumn: "1 / -1" }}><Typography variant="overline">{t("jobDetailsAttachmentTypes")}</Typography><Typography>{checklist}</Typography></Box>
            <Box sx={{ gridColumn: "1 / -1" }}><Typography variant="overline">{t("jobDetailsJobUrl")}</Typography><Typography>{job?.jobUrl ? <a href={job.jobUrl} target="_blank" rel="noreferrer">{job.jobUrl}</a> : ""}</Typography></Box>
            <Box sx={{ gridColumn: "1 / -1", mt: 1 }}>
              <Box sx={{ display: "flex", justifyContent: "space-between", gap: 1, alignItems: "center", flexWrap: "wrap", mb: 0.5 }}>
                <Typography variant="overline">{t("jobDetailsSummaryAndSkills")}</Typography>
                <Button size="small" variant="outlined" disabled={refreshingAi} onClick={async () => {
                  if (!jobId) return;
                  if (!(await confirmAction(t("jobDetailsRefreshAiConfirm"), { title: t("jobDetailsRefreshAiTitle"), confirmLabel: t("jobDetailsRefreshAi") }))) return;
                  setRefreshingAi(true);
                  try {
                    const res = await api.post<JobApplication>(`/jobapplications/${jobId}/refresh-ai`);
                    setJob(res.data);
                    toast(t("jobDetailsSummaryRefreshed"), "success");
                  } catch (error: any) {
                    toast(getApiErrorMessage(error, t("jobDetailsSummaryRefreshFailed")), "error");
                  } finally {
                    setRefreshingAi(false);
                  }
                }}>{refreshingAi ? t("jobDetailsRefreshing") : t("jobDetailsRefreshAi")}</Button>
              </Box>
              <Typography sx={{ whiteSpace: "pre-wrap" }}>{summaryFirstText}</Typography>
            </Box>
            {showTranslatedText ? (
              <Box sx={{ gridColumn: "1 / -1" }}>
                <Typography variant="overline">{t("jobDetailsTranslatedRoleText")}</Typography>
                <Typography sx={{ whiteSpace: "pre-wrap" }}>{translatedDescriptionText}</Typography>
              </Box>
            ) : null}
            {showOriginalText ? (
              <Box sx={{ gridColumn: "1 / -1" }}>
                <Typography variant="overline">{t("jobDetailsOriginalRoleText")}</Typography>
                <Typography sx={{ whiteSpace: "pre-wrap", color: "text.secondary" }}>{originalDescriptionText}</Typography>
              </Box>
            ) : null}
            <Box sx={{ gridColumn: "1 / -1" }}><Typography variant="overline">{t("editJobNotes")}</Typography><Typography sx={{ whiteSpace: "pre-wrap" }}>{job?.notes ?? ""}</Typography></Box>
          </Box>
        )}

        {tab === 1 && jobId && <Correspondence jobId={jobId} />}
        {tab === 2 && jobId && <Attachments jobId={jobId} />}

        {tab === 3 && (
          <Box sx={{ display: "flex", flexDirection: "column", gap: 2 }}>
            <Box sx={{ p: 1.5, borderRadius: 3, border: "1px solid", borderColor: "divider", backgroundColor: "background.default" }}>
              <Box sx={{ display: "flex", justifyContent: "space-between", alignItems: "center", gap: 1, flexWrap: "wrap", mb: 1 }}>
                <Typography variant="overline">{t("jobDetailsTabTailoredCv")}</Typography>
                <Box sx={{ display: "flex", gap: 1, flexWrap: "wrap", alignItems: "center" }}>
                  <FormControl size="small" sx={{ minWidth: 180 }}>
                    <InputLabel>{t("jobDetailsTailoredCvMode")}</InputLabel>
                    <Select value={generationMode} label={t("jobDetailsTailoredCvMode")} onChange={(e) => setGenerationMode(e.target.value as GenerationMode)}>
                      <MenuItem value="default">{t("jobDetailsGenerationDefault")}</MenuItem>
                      <MenuItem value="concise">{t("jobDetailsGenerationConcise")}</MenuItem>
                      <MenuItem value="ats">{t("jobDetailsGenerationAts")}</MenuItem>
                      <MenuItem value="achievement">{t("jobDetailsGenerationAchievement")}</MenuItem>
                      <MenuItem value="interview">{t("jobDetailsGenerationInterview")}</MenuItem>
                    </Select>
                  </FormControl>
                  <Button size="small" variant="outlined" onClick={async () => {
                    try {
                      const me = await api.get<{ profileCvText?: string | null }>("/auth/me");
                      setTailoredCvText(me.data?.profileCvText ?? "");
                      toast(t("jobDetailsLoadedMasterCv"), "success");
                    } catch {
                      toast(t("jobDetailsLoadMasterCvFailed"), "error");
                    }
                  }}>{t("jobDetailsStartFromMasterCv")}</Button>
                  <Button size="small" variant="outlined" disabled={generatingPackage} onClick={async () => {
                    if (!jobId) return;
                    setGeneratingPackage(true);
                    try {
                      const res = await api.post<ApplicationPackageResponse>(`/jobapplications/${jobId}/generate-application-package`, null, { params: { mode: generationMode } });
                      setApplicationPackage(res.data);
                      setTailoredCvText(res.data.tailoredCvText ?? "");
                      toast(t("jobDetailsPackageGenerated"), "success");
                    } catch (error: any) {
                      toast(getApiErrorMessage(error, t("jobDetailsPackageGenerationFailed")), "error");
                    } finally {
                      setGeneratingPackage(false);
                    }
                  }}>{generatingPackage ? t("jobDetailsGeneratingPackage") : t("jobDetailsGeneratePackage")}</Button>
                  <Button size="small" variant="outlined" onClick={() => setTailoredCvText("")}>{t("jobDetailsClear")}</Button>
                  <Button size="small" variant="outlined" onClick={() => navigator.clipboard.writeText(tailoredCvText)}>{t("jobDetailsCopy")}</Button>
                  <Button size="small" variant="contained" disabled={savingTailoredCv} onClick={async () => {
                    if (!jobId) return;
                    setSavingTailoredCv(true);
                    try {
                      await api.put(`/jobapplications/${jobId}/tailored-cv`, { tailoredCvText });
                      setJob((prev) => prev ? { ...prev, tailoredCvText, tailoredCvUpdatedAt: new Date().toISOString() } : prev);
                      setReadiness(null);
                      setInterviewPrep(null);
                      toast(t("jobDetailsTailoredCvSaved"), "success");
                    } catch (error: any) {
                      toast(getApiErrorMessage(error, t("jobDetailsTailoredCvSaveFailed")), "error");
                    } finally {
                      setSavingTailoredCv(false);
                    }
                  }}>{savingTailoredCv ? t("jobDetailsSaving") : t("jobDetailsSaveTailoredCv")}</Button>
                </Box>
              </Box>
              <Typography variant="body2" sx={{ color: "text.secondary", mb: 1.5 }}>{t("jobDetailsTailoredCvIntro")}</Typography>
              <TextField value={tailoredCvText} onChange={(e) => setTailoredCvText(e.target.value)} multiline minRows={14} fullWidth placeholder={t("jobDetailsTailoredCvPlaceholder")} />
              <Typography variant="caption" sx={{ color: "text.secondary", mt: 1, display: "block" }}>{t("jobDetailsLastUpdated", { value: job?.tailoredCvUpdatedAt ? new Date(job.tailoredCvUpdatedAt).toLocaleString() : t("jobDetailsNotSavedYet") })}</Typography>
            </Box>

            {applicationPackage ? (
              <Box sx={{ display: "grid", gridTemplateColumns: { xs: "1fr", md: "1fr 1fr" }, gap: 2 }}>
                <DraftCard title={t("jobDetailsCoverLetterDraft")} content={applicationPackage.coverLetterDraft ?? t("jobDetailsNoDraftAvailable")} onSave={async (content) => {
                  if (!jobId) return;
                  setSavingApplicationDrafts(true);
                  try {
                    await api.put(`/jobapplications/${jobId}/application-drafts`, { coverLetterText: content });
                    setJob((prev) => prev ? { ...prev, coverLetterText: content } : prev);
                    setReadiness(null);
                    toast(t("jobDetailsCoverLetterSaved"), "success");
                  } catch (error: any) {
                    toast(getApiErrorMessage(error, t("jobDetailsCoverLetterSaveFailed")), "error");
                  } finally {
                    setSavingApplicationDrafts(false);
                  }
                }} saving={savingApplicationDrafts} />
                <DraftCard title={t("jobDetailsShortApplicationAnswer")} content={applicationPackage.applicationAnswerDraft ?? t("jobDetailsNoDraftAvailable")} onSave={async (content) => {
                  if (!jobId) return;
                  setSavingApplicationDrafts(true);
                  try {
                    await api.put(`/jobapplications/${jobId}/application-drafts`, { notes: `Application answer draft:\n${content}` });
                    setReadiness(null);
                    toast(t("jobDetailsApplicationAnswerSaved"), "success");
                  } catch (error: any) {
                    toast(getApiErrorMessage(error, t("jobDetailsApplicationAnswerSaveFailed")), "error");
                  } finally {
                    setSavingApplicationDrafts(false);
                  }
                }} saving={savingApplicationDrafts} />
                <DraftCard title={t("jobDetailsRecruiterMessageDraft")} content={applicationPackage.recruiterMessageDraft ?? t("jobDetailsNoDraftAvailable")} onSave={async (content) => {
                  if (!jobId) return;
                  setSavingApplicationDrafts(true);
                  try {
                    await api.put(`/jobapplications/${jobId}/application-drafts`, { recruiterMessageDraft: content });
                    setJob((prev) => prev ? { ...prev, recruiterMessageDraft: content } : prev);
                    toast(t("jobDetailsRecruiterMessageSaved"), "success");
                  } catch (error: any) {
                    toast(getApiErrorMessage(error, t("jobDetailsRecruiterMessageSaveFailed")), "error");
                  } finally {
                    setSavingApplicationDrafts(false);
                  }
                }} saving={savingApplicationDrafts} />
                <ListCard title={t("jobDetailsKeyPoints")} items={applicationPackage.keyPoints} />
              </Box>
            ) : null}
          </Box>
        )}

        {tab === 4 && (
          <Box>
            {loadingDraft ? <Box sx={{ py: 4, display: "flex", justifyContent: "center" }}><CircularProgress size={28} /></Box> : followUpDraft ? (
              <Box sx={{ display: "flex", flexDirection: "column", gap: 2 }}>
                <Box><Typography variant="overline">{t("jobDetailsReason")}</Typography><Typography>{followUpDraft.reason}</Typography></Box>
                <Box><Typography variant="overline">{t("jobDetailsSuggestedSendDate")}</Typography><Typography>{new Date(followUpDraft.suggestedSendOn).toLocaleDateString()}</Typography></Box>
                <TextField label={t("jobDetailsRecipient")} value={draftRecipient} onChange={(e) => setDraftRecipient(e.target.value)} helperText={t("jobDetailsRecipientHelp")} />
                <TextField label={t("jobDetailsSubject")} value={draftSubject} onChange={(e) => setDraftSubject(e.target.value)} />
                <TextField label={t("jobDetailsDraft")} multiline minRows={8} value={draftBody} onChange={(e) => setDraftBody(e.target.value)} />
                <Box sx={{ display: "flex", justifyContent: "space-between", gap: 1, flexWrap: "wrap" }}>
                  <Button variant="outlined" onClick={() => navigator.clipboard.writeText(`${draftSubject}\n\n${draftBody}`)}>{t("jobDetailsCopyDraft")}</Button>
                  <Button variant="contained" disabled={sendingDraft || !draftSubject.trim() || !draftBody.trim()} onClick={async () => {
                    if (!jobId) return;
                    setSendingDraft(true);
                    try {
                      await api.post(`/jobapplications/${jobId}/send-followup`, { toEmail: draftRecipient || null, subject: draftSubject, body: draftBody, nextFollowUpAt: followUpDraft.suggestedSendOn || null });
                      setJob((prev) => prev ? { ...prev, followUpAt: followUpDraft.suggestedSendOn } : prev);
                      setReadiness(null);
                      toast(t("jobDetailsFollowUpSent"), "success");
                    } catch (error: any) {
                      toast(getApiErrorMessage(error, t("jobDetailsFollowUpSendFailed")), "error");
                    } finally {
                      setSendingDraft(false);
                    }
                  }}>{sendingDraft ? t("jobDetailsSending") : t("jobDetailsSendAndLogEmail")}</Button>
                </Box>
              </Box>
            ) : <Typography sx={{ color: "text.secondary" }}>{t("jobDetailsNoDraftAvailable")}</Typography>}
          </Box>
        )}

        {tab === 5 && (
          <Box>
            {loadingCandidateFit ? <Box sx={{ py: 4, display: "flex", justifyContent: "center" }}><CircularProgress size={28} /></Box> : candidateFit ? (
              <Box sx={{ display: "flex", flexDirection: "column", gap: 2.5 }}>
                <Box sx={{ display: "flex", justifyContent: "space-between", alignItems: "center", gap: 1, flexWrap: "wrap" }}>
                  <Box><Typography variant="overline">{t("jobDetailsHowYouMatch")}</Typography><Typography sx={{ whiteSpace: "pre-wrap" }}>{candidateFit.matchSummary}</Typography></Box>
                  <Box sx={{ display: "flex", gap: 1, flexWrap: "wrap", alignItems: "center" }}>
                    <Chip label={t("jobDetailsMatchPercent", { count: candidateFit.matchScore })} color={candidateFit.matchScore >= 75 ? "success" : candidateFit.matchScore >= 55 ? "warning" : "default"} size="small" />
                    {fitLevel ? <Chip label={fitLevel.label} color={fitLevel.color} size="small" /> : null}
                  </Box>
                </Box>
                <DraftCard title={t("jobDetailsTailoredPitch")} content={candidateFit.tailoredPitch} />
                <SectionChips title={t("jobDetailsStrongMatches")} items={candidateFit.strengths} color="success" />
                <SectionChips title={t("jobDetailsPossibleGaps")} items={candidateFit.gaps} color="warning" outlined />
                <TwoColumnSection leftTitle={t("jobDetailsWhatToMention")} leftItems={candidateFit.mention} rightTitle={t("jobDetailsWhatNotToOverstate")} rightItems={candidateFit.avoid} />
                <TwoColumnSection leftTitle={t("jobDetailsImproveCv")} leftItems={candidateFit.cvImprovements} rightTitle={t("jobDetailsMissingKeywords")} rightItems={candidateFit.missingKeywords} />
                <TwoColumnSection leftTitle={t("jobDetailsTabInterviewPrep")} leftItems={candidateFit.interviewPrep} rightTitle={t("jobDetailsCvGuidance")} rightItems={candidateFit.guidance.cv} />
                <TwoColumnSection leftTitle={t("jobDetailsCoverLetterGuidance")} leftItems={candidateFit.guidance.coverLetter} rightTitle={t("jobDetailsRecruiterMessageGuidance")} rightItems={candidateFit.guidance.recruiterMessage} />
                <Box sx={{ display: "grid", gridTemplateColumns: { xs: "1fr", md: "1fr 1fr" }, gap: 2 }}>
                  <DraftCard title={t("jobDetailsCoverLetterDraft")} content={candidateFit.coverLetterDraft ?? t("jobDetailsNoDraftAvailableYet")} />
                  <DraftCard title={t("jobDetailsRecruiterMessageDraft")} content={candidateFit.recruiterMessageDraft ?? t("jobDetailsNoDraftAvailableYet")} />
                </Box>
              </Box>
            ) : <Typography sx={{ color: "text.secondary" }}>{t("jobDetailsCandidateFitEmpty")}</Typography>}
          </Box>
        )}

        {tab === 6 && (
          <Box>
            {loadingInterviewPrep ? <Box sx={{ py: 4, display: "flex", justifyContent: "center" }}><CircularProgress size={28} /></Box> : interviewPrep ? (
              <Box sx={{ display: "flex", flexDirection: "column", gap: 2 }}>
                <DraftCard title={t("jobDetailsInterviewPrepBrief")} content={interviewPrep.summary} />
                <TwoColumnSection leftTitle={t("jobDetailsTalkingPoints")} leftItems={interviewPrep.talkingPoints} rightTitle={t("jobDetailsLikelyQuestions")} rightItems={interviewPrep.likelyQuestions} />
                <ListCard title={t("jobDetailsWeakSpots")} items={interviewPrep.weakSpots} />
              </Box>
            ) : <Typography sx={{ color: "text.secondary" }}>{t("jobDetailsNoInterviewPrep")}</Typography>}
          </Box>
        )}

        {tab === 7 && (
          <Box>
            {loadingReadiness ? <Box sx={{ py: 4, display: "flex", justifyContent: "center" }}><CircularProgress size={28} /></Box> : readiness ? (
              <Box sx={{ display: "flex", flexDirection: "column", gap: 2 }}>
                <Box sx={{ display: "flex", justifyContent: "space-between", alignItems: "center", gap: 1, flexWrap: "wrap" }}>
                  <Typography variant="h6">{t("jobDetailsApplicationReadiness")}</Typography>
                  <Box sx={{ display: "flex", gap: 1, flexWrap: "wrap" }}>
                    <Chip label={t("jobDetailsReadyPercent", { count: readiness.score })} color={readiness.score >= 80 ? "success" : readiness.score >= 60 ? "warning" : "default"} />
                    <Chip label={readiness.level} variant="outlined" />
                  </Box>
                </Box>
                <TwoColumnSection leftTitle={t("jobDetailsCompleted")} leftItems={readiness.completed} rightTitle={t("jobDetailsStillMissing")} rightItems={readiness.missing} />
                <ListCard title={t("jobDetailsSmartReminders")} items={readiness.reminders} />
              </Box>
            ) : <Typography sx={{ color: "text.secondary" }}>{t("jobDetailsNoReadiness")}</Typography>}
          </Box>
        )}

        {tab === 8 && isAdmin && (
          <Box sx={{ display: "flex", flexDirection: "column", gap: 1 }}>
            {history.length === 0 ? <Typography sx={{ color: "text.secondary" }}>{t("jobDetailsNoHistory")}</Typography> : history.map((entry) => <PaperRow key={entry.id} type={entry.type} oldValue={entry.oldValue} newValue={entry.newValue} at={entry.at} note={entry.note} />)}
          </Box>
        )}
      </DialogContent>
    </Dialog>
  );
}

function SectionChips({ title, items, color, outlined }: { title: string; items: string[]; color: "success" | "warning"; outlined?: boolean }) {
  const { t } = useI18n();

  return (
    <Box>
      <Box sx={{ display: "flex", justifyContent: "space-between", alignItems: "center", gap: 1, flexWrap: "wrap" }}>
        <Typography variant="overline">{title}</Typography>
        <Button size="small" variant="outlined" onClick={() => copyLines(items)}>{t("jobDetailsCopy")}</Button>
      </Box>
      <Box sx={{ display: "flex", gap: 1, flexWrap: "wrap", mt: 0.5 }}>
        {items.length ? items.map((item) => <Chip key={item} label={item} color={color} variant={outlined ? "outlined" : "filled"} size="small" />) : <Typography sx={{ color: "text.secondary" }}>{t("jobDetailsNothingHighlighted")}</Typography>}
      </Box>
    </Box>
  );
}

function TwoColumnSection({ leftTitle, leftItems, rightTitle, rightItems }: { leftTitle: string; leftItems: string[]; rightTitle: string; rightItems: string[] }) {
  return (
    <Box sx={{ display: "grid", gridTemplateColumns: { xs: "1fr", md: "1fr 1fr" }, gap: 2 }}>
      <ListCard title={leftTitle} items={leftItems} />
      <ListCard title={rightTitle} items={rightItems} />
    </Box>
  );
}

function ListCard({ title, items }: { title: string; items: string[] }) {
  const { t } = useI18n();

  return (
    <Box sx={{ p: 1.5, borderRadius: 3, border: "1px solid", borderColor: "divider", backgroundColor: "background.default" }}>
      <Box sx={{ display: "flex", justifyContent: "space-between", alignItems: "center", gap: 1, flexWrap: "wrap", mb: 1 }}>
        <Typography variant="overline">{title}</Typography>
        <Button size="small" variant="outlined" onClick={() => copyLines(items)}>{t("jobDetailsCopy")}</Button>
      </Box>
      <Box sx={{ display: "flex", flexDirection: "column", gap: 0.75 }}>
        {items.length ? items.map((item, index) => <Typography key={`${title}-${index}-${item}`} sx={{ color: "text.primary" }}>• {item}</Typography>) : <Typography sx={{ color: "text.secondary" }}>{t("jobDetailsNothingHighlighted")}</Typography>}
      </Box>
    </Box>
  );
}

function DraftCard({ title, content, onSave, saving }: { title: string; content: string; onSave?: (content: string) => Promise<void> | void; saving?: boolean }) {
  const { t } = useI18n();
  const [value, setValue] = React.useState(content);

  React.useEffect(() => {
    setValue(content);
  }, [content]);

  return (
    <Box sx={{ p: 1.5, borderRadius: 3, border: "1px solid", borderColor: "divider", backgroundColor: "background.default" }}>
      <Box sx={{ display: "flex", justifyContent: "space-between", alignItems: "center", gap: 1, flexWrap: "wrap", mb: 1 }}>
        <Typography variant="overline">{title}</Typography>
        <Box sx={{ display: "flex", gap: 1, flexWrap: "wrap" }}>
          <Button size="small" variant="outlined" onClick={() => navigator.clipboard.writeText(value)}>{t("jobDetailsCopy")}</Button>
          {onSave ? <Button size="small" variant="contained" disabled={saving} onClick={() => onSave(value)}>{saving ? t("jobDetailsSaving") : t("save")}</Button> : null}
        </Box>
      </Box>
      <TextField value={value} onChange={(e) => setValue(e.target.value)} multiline minRows={6} fullWidth />
    </Box>
  );
}

function PaperRow({ type, oldValue, newValue, at, note }: { type: string; oldValue?: string; newValue?: string; at: string; note?: string }) {
  return (
    <Box sx={{ border: "1px solid rgba(15,23,42,0.08)", borderRadius: 2, p: 1.25, background: "rgba(255,255,255,0.6)" }}>
      <Typography sx={{ fontWeight: 900, lineHeight: 1.25 }}>
        {type}
        {oldValue || newValue ? <span style={{ fontWeight: 700, opacity: 0.7 }}>{" "}({oldValue ?? ""} {oldValue || newValue ? "->" : ""} {newValue ?? ""})</span> : null}
      </Typography>
      <Typography variant="caption" sx={{ color: "text.secondary" }}>
        {at ? new Date(at).toLocaleString() : ""}
        {note ? ` - ${note}` : ""}
      </Typography>
    </Box>
  );
}
