'use client';

import { useEffect, useState } from 'react';
import { useTranslations } from 'next-intl';
import { Button } from '@/components/ui/shared/Button';
import { Checkbox } from '@/components/ui/shared/Checkbox';
import { isDetailReadyForLabDispatch, isLabCaseCompleted } from '@/components/treatment/treatmentDetailRules';
import { AppDateInput } from '@/components/ui/shared/AppDateInput';
import { toDateInputValue } from '@/components/lab/labCaseDueDateDisplay';
import { FORM_SELECT_CLASS } from '@/components/shared/formSelectStyles';
import { LinkedOrganizationSearchCombobox } from '@/components/ui/treatment/LinkedOrganizationSearchCombobox';
import { CaseSentLabel } from '@/components/ui/treatment/CaseSentLabel';
import { DetailLabCaseCommentsSection } from '@/components/ui/treatment/DetailLabCaseCommentsSection';
import { LabCaseTrackerCard } from '@/components/ui/treatment/LabCaseTrackerCard';
import { treatmentTypeLabelFromCatalog } from '@/components/shared/treatmentTypeDisplay';
import { treatmentsApi } from '@/lib/api/treatments';
import { prosthesisCatalogApi } from '@/lib/api/prosthesis-catalog';
import { prosthesisTypeColorFromCatalog } from '@/components/treatment/prosthesisTypeDisplay';
import type { ProsthesisCatalogEntry, TreatmentCatalogEntry } from '@/types/treatment-catalog';
import type { LabCaseDraft, LinkedOrganizationOption, TreatmentDetailDraft } from '@/types/treatment';
import type { PatientLabCaseSummary } from '@/types/lab-case-activity';

interface LabCasesDispatchPanelProps {
  details: TreatmentDetailDraft[];
  activeDetailId: string;
  labCases: LabCaseDraft[];
  labDependentCodes: Set<string>;
  treatmentCatalog: TreatmentCatalogEntry[];
  labCaseSummary?: PatientLabCaseSummary | null;
  locale: string;
  onLabCaseSummaryChange?: (summary: PatientLabCaseSummary) => void;
  onLabCaseMarkedRead?: (labCaseId: string) => void;
  onLabCaseActivityChange?: () => void;
  activeLabCaseId: string | null;
  onLabCasesChange: (labCases: LabCaseDraft[]) => void;
  disabled: boolean;
  canEdit: boolean;
  orgs: LinkedOrganizationOption[];
  organizationSearch: string;
  onOrganizationSearchChange: (value: string) => void;
  recentOrganizationIds: string[];
  onRecentOrganizationPick: (orgId: string) => void;
  canInviteLab?: boolean;
  onInviteLab?: () => void;
  sendBusyId: string | null;
  onAddLabCase: () => void;
  onSendLabCase: (labCase: LabCaseDraft, comment?: string) => void;
  onCommentError?: (message: string) => void;
}

function sentDetailClientIds(labCases: LabCaseDraft[]): Set<string> {
  const ids = new Set<string>();
  for (const lc of labCases) {
    if (lc.sentAt && lc.detailClientId) ids.add(lc.detailClientId);
  }
  return ids;
}

function prosthesisTeethRows(
  labCase: LabCaseDraft,
  activeDetail: TreatmentDetailDraft,
  detailNumber: number,
): Array<{ detailClientId: string; tooth: string; detailNumber: number }> {
  if (labCase.detailClientId !== activeDetail.clientId) return [];
  if (activeDetail.treatmentType !== 'prosthesis') return [];

  return activeDetail.teeth.map((tooth) => ({
    detailClientId: activeDetail.clientId,
    tooth,
    detailNumber,
  }));
}

function isProsthesisMapComplete(
  labCase: LabCaseDraft,
  rows: Array<{ detailClientId: string; tooth: string }>,
): boolean {
  if (rows.length === 0) return true;
  return rows.every((row) =>
    labCase.toothProsthesis.some(
      (tp) =>
        tp.detailClientId === row.detailClientId &&
        tp.tooth === row.tooth &&
        Boolean(tp.prosthesisTypeCode),
    ),
  );
}

export function LabCasesDispatchPanel({
  details,
  activeDetailId,
  labCases,
  labDependentCodes,
  treatmentCatalog,
  labCaseSummary,
  locale,
  onLabCaseSummaryChange,
  onLabCaseMarkedRead,
  onLabCaseActivityChange,
  activeLabCaseId,
  onLabCasesChange,
  disabled,
  canEdit,
  orgs,
  organizationSearch,
  onOrganizationSearchChange,
  recentOrganizationIds,
  onRecentOrganizationPick,
  canInviteLab = false,
  onInviteLab,
  sendBusyId,
  onAddLabCase,
  onSendLabCase,
  onCommentError,
}: LabCasesDispatchPanelProps) {
  const t = useTranslations('treatment');
  const [prosthesisOptions, setProsthesisOptions] = useState<ProsthesisCatalogEntry[]>([]);
  const [applyAllProsthesis, setApplyAllProsthesis] = useState('');
  const [pendingComment, setPendingComment] = useState('');
  const hasTrackerSummary = Boolean(labCaseSummary && labCaseSummary.labCaseId);

  const activeLinkedOrganizations = orgs.filter((o) => o.active);
  const recentOrganizations = recentOrganizationIds
    .map((id) => activeLinkedOrganizations.find((o) => o.id === id))
    .filter(Boolean) as LinkedOrganizationOption[];

  const activeDetail = details.find((d) => d.clientId === activeDetailId) ?? null;
  const isLabDependentDetail = Boolean(
    activeDetail && isDetailReadyForLabDispatch(activeDetail, labDependentCodes),
  );

  const labCaseForActiveDetail =
    labCases.find((lc) => lc.detailClientId === activeDetailId) ?? null;

  const activeLabCase =
    labCaseForActiveDetail ??
    (activeLabCaseId ? labCases.find((lc) => lc.clientId === activeLabCaseId) : null);

  const detailAlreadyInShipment = Boolean(labCaseForActiveDetail);
  const canAddLabShipment =
    !detailAlreadyInShipment && !sentDetailClientIds(labCases).has(activeDetailId);

  const sent = Boolean(activeLabCase?.sentAt);
  const activeDetailNumber = details.findIndex((d) => d.clientId === activeDetailId) + 1;

  const activeLabOrgName = activeLabCase?.destinationOrganizationId
    ? orgs.find((o) => o.id === activeLabCase.destinationOrganizationId)?.name
    : null;

  const prosthesisRows = activeLabCase && activeDetail
    ? prosthesisTeethRows(activeLabCase, activeDetail, activeDetailNumber)
    : [];
  const prosthesisComplete = activeLabCase
    ? isProsthesisMapComplete(activeLabCase, prosthesisRows)
    : true;

  useEffect(() => {
    if (!activeLabCase?.destinationOrganizationId) {
      setProsthesisOptions([]);
      return;
    }

    let cancelled = false;
    void prosthesisCatalogApi
      .list(activeLabCase.destinationOrganizationId)
      .then((res) => {
        if (!cancelled) setProsthesisOptions(res.data);
      })
      .catch(() => {
        if (!cancelled) setProsthesisOptions([]);
      });

    return () => {
      cancelled = true;
    };
  }, [activeLabCase?.destinationOrganizationId]);

  useEffect(() => {
    setPendingComment('');
  }, [activeLabCase?.clientId]);

  if (!activeDetail || !isLabDependentDetail) {
    return null;
  }

  function detailSummary(d: TreatmentDetailDraft) {
    const typeLabel = treatmentTypeLabelFromCatalog(d.treatmentType, treatmentCatalog);
    const teeth = d.teeth.length ? d.teeth.join(', ') : t('teethNone');
    return `${t('detailLabel', { n: activeDetailNumber })} · ${typeLabel} · ${teeth}`;
  }

  function updateActiveLabCase(patch: Partial<LabCaseDraft>) {
    if (!activeLabCase) return;
    onLabCasesChange(
      labCases.map((lc) => (lc.clientId === activeLabCase.clientId ? { ...lc, ...patch } : lc)),
    );
  }

  function setToothProsthesis(
    detailClientId: string,
    tooth: string,
    prosthesisTypeCode: string,
  ) {
    if (!activeLabCase) return;
    const rest = activeLabCase.toothProsthesis.filter(
      (tp) => !(tp.detailClientId === detailClientId && tp.tooth === tooth),
    );
    const next = prosthesisTypeCode
      ? [...rest, { detailClientId, tooth, prosthesisTypeCode }]
      : rest;
    updateActiveLabCase({ toothProsthesis: next });
  }

  function applyProsthesisToAll(code: string) {
    if (!activeLabCase || !code) return;
    const next = prosthesisRows.map((row) => ({
      detailClientId: row.detailClientId,
      tooth: row.tooth,
      prosthesisTypeCode: code,
    }));
    updateActiveLabCase({ toothProsthesis: next });
  }

  function toggleAttachmentInActiveLabCase(attachmentId: string, checked: boolean) {
    if (!activeLabCase || sent) return;
    const set = new Set(activeLabCase.attachmentIds);
    if (checked) set.add(attachmentId);
    else set.delete(attachmentId);
    updateActiveLabCase({ attachmentIds: [...set] });
  }

  function handleSelectOrganization(org: LinkedOrganizationOption) {
    updateActiveLabCase({
      destinationOrganizationId: org.id,
      toothProsthesis: [],
    });
    setApplyAllProsthesis('');
  }

  const caseFullyComplete = isLabCaseCompleted(activeLabCase?.taskProgress);
  const canEditDueDate = canEdit && !disabled && (!sent || !caseFullyComplete);
  // Comments/progress belong to the shipment context, even when the treatment is opened from history.
  // Do not block commenting just because the treatment editor is read-only.
  const canPostComments = canEdit && !caseFullyComplete;
  const canShowComments = Boolean(activeLabCase?.id);
  const commentsDeferSubmit = Boolean(!sent);

  async function handleSentDueDateBlur(nextValue: string) {
    if (!activeLabCase?.id || !sent || !canEditDueDate) return;
    const dueDate = nextValue || null;
    if (dueDate === (activeLabCase.dueDate?.slice(0, 10) ?? null)) return;
    try {
      const response = await treatmentsApi.updateLabCaseDueDate(activeLabCase.id, dueDate);
      updateActiveLabCase({
        dueDate: response.data.dueDate,
        taskProgress: response.data.taskProgress ?? activeLabCase.taskProgress,
      });
    } catch (error) {
      onCommentError?.(error instanceof Error ? error.message : t('dueDateUpdateError'));
    }
  }

  function renderShipmentCardHeader() {
    return (
      <div className="flex flex-col gap-3 border-b border-border/60 pb-3 sm:flex-row sm:items-start sm:justify-between">
        <p className="text-xs font-semibold text-text-primary">{t('labShipmentIncludedDetails')}</p>
        {renderDueDateField()}
      </div>
    );
  }

  function renderDueDateField() {
    if (!activeLabCase) return null;
    const inputValue = toDateInputValue(activeLabCase.dueDate);
    const dueDateInputId = `lab-case-due-date-${activeLabCase.clientId}`;

    return (
      <div className="shrink-0 sm:text-end">
        <div className="flex items-center gap-2 sm:justify-end">
          <label
            htmlFor={dueDateInputId}
            className="text-xs font-medium text-text-secondary shrink-0"
          >
            {t('dueDateLabel')}{' '}
            <span className="font-normal text-text-muted">({t('dueDateOptional')})</span>
          </label>
          <AppDateInput
            id={dueDateInputId}
            value={inputValue}
            disabled={!canEditDueDate}
            onChange={(next) => {
              updateActiveLabCase({ dueDate: next || null });
            }}
            onBlur={(committed) => {
              if (sent) void handleSentDueDateBlur(committed);
            }}
            className={`${FORM_SELECT_CLASS} w-full max-w-[11rem] rounded-md py-1.5 text-sm`}
          />
        </div>
        {sent && caseFullyComplete && activeLabCase.dueDate ? (
          <p className="mt-1.5 text-[11px] text-text-muted sm:text-end">{t('dueDateLockedCompleted')}</p>
        ) : null}
      </div>
    );
  }

  function renderIncludedDetailSummary() {
    if (!activeDetail) return null;
    const typeLabel = treatmentTypeLabelFromCatalog(activeDetail.treatmentType, treatmentCatalog);

    if (activeDetail.treatmentType !== 'prosthesis' || !activeLabCase) {
      return (
        <p className="text-sm text-text-primary rounded-[var(--radius-sm)] border border-border/50 bg-background-secondary/50 px-3 py-2">
          {detailSummary(activeDetail)}
        </p>
      );
    }

    const byType = new Map<string, string[]>();
    for (const tp of activeLabCase.toothProsthesis) {
      if (tp.detailClientId !== activeDetail.clientId) continue;
      if (!tp.prosthesisTypeCode) continue;
      const list = byType.get(tp.prosthesisTypeCode) ?? [];
      list.push(tp.tooth);
      byType.set(tp.prosthesisTypeCode, list);
    }

    const uniqueSelected = [...new Set(activeDetail.teeth)];
    const mappedTeeth = new Set<string>();
    for (const teeth of byType.values()) {
      for (const tooth of teeth) mappedTeeth.add(tooth);
    }
    const unmapped = uniqueSelected.filter((t) => !mappedTeeth.has(t));

    const groups = [...byType.entries()]
      .map(([code, teeth]) => ({
        code,
        teeth: [...new Set(teeth)].sort((a, b) => a.localeCompare(b)),
        label: prosthesisOptions.find((p) => p.code === code)?.label ?? code,
      }))
      .sort((a, b) => a.code.localeCompare(b.code));

    return (
      <div className="text-sm text-text-primary rounded-[var(--radius-sm)] border border-border/50 bg-background-secondary/50 px-3 py-2 space-y-1">
        <p className="text-text-primary">
          {t('detailLabel', { n: activeDetailNumber })} · {typeLabel}
        </p>
        {groups.map((g) => (
          <p
            key={g.code}
            className="text-[13px]"
            style={{ color: prosthesisTypeColorFromCatalog(g.code, prosthesisOptions) }}
          >
            {g.label}: <span className="text-text-primary">{g.teeth.join(', ')}</span>
          </p>
        ))}
        {unmapped.length > 0 ? (
          <p className="text-[13px] text-text-muted">
            {t('prosthesisUnassigned')}: <span className="text-text-primary">{unmapped.join(', ')}</span>
          </p>
        ) : null}
      </div>
    );
  }

  const activeDetailAttachments = activeDetail.attachmentMetas ?? [];

  return (
    <div className="surface-card p-4 space-y-4">
      <div className="flex flex-wrap items-center justify-between gap-3">
        <div>
          <h3 className="text-sm font-semibold text-text-primary">{t('labDispatchTitle')}</h3>
          <p className="text-xs text-text-muted mt-0.5">
            {t('labDispatchSubtitle')} {t('labDispatchSendHint')}
          </p>
        </div>
        {canAddLabShipment && (
          <Button
            type="button"
            variant="primary"
            disabled={!canEdit || disabled}
            onClick={onAddLabCase}
          >
            {t('addLabShipment')}
          </Button>
        )}
      </div>

      {!detailAlreadyInShipment ? (
        <p className="text-xs text-text-muted">{t('labDispatchEmpty')}</p>
      ) : activeLabCase ? (
        <div className="space-y-4 border border-border/60 rounded-[var(--radius-md)] p-3 sm:p-4 bg-background-secondary/30">
          {renderShipmentCardHeader()}
          {sent ? (
            <>
              {renderIncludedDetailSummary()}
              {hasTrackerSummary && labCaseSummary ? (
                <LabCaseTrackerCard
                  summary={labCaseSummary}
                  locale={locale}
                  onSummaryChange={onLabCaseSummaryChange}
                  onMarkedRead={onLabCaseMarkedRead}
                />
              ) : null}

              {canShowComments && activeLabCase?.id ? (
                <DetailLabCaseCommentsSection
                  labCaseId={activeLabCase.id}
                  canPost={canPostComments}
                  onError={onCommentError}
                  onMarkRead={onLabCaseMarkedRead}
                  onActivityChange={onLabCaseActivityChange}
                />
              ) : null}

              {activeLabOrgName ? (
                <div>
                  <p className="text-xs font-medium text-text-secondary">{t('selectLab')}</p>
                  <p className="text-sm text-text-primary mt-1">{activeLabOrgName}</p>
                </div>
              ) : null}

              <CaseSentLabel
                treatmentCase={{
                  destinationOrganizationId: activeLabCase.destinationOrganizationId,
                  sendToOrganizationIds: activeLabCase.destinationOrganizationId
                    ? [activeLabCase.destinationOrganizationId]
                    : [],
                  sentAt: activeLabCase.sentAt ?? null,
                  sends: activeLabCase.sends,
                }}
                orgs={orgs}
              />
            </>
          ) : (
            <>
              {renderIncludedDetailSummary()}

              {!sent && activeDetailAttachments.length > 0 ? (
                <div>
                  <p className="text-xs font-medium text-text-secondary mb-2">
                    {t('labShipmentAttachments')}
                  </p>
                  <p className="text-[11px] text-text-muted mb-2">{t('labShipmentAttachmentsHint')}</p>
                  <div className="flex flex-col gap-2">
                    {activeDetailAttachments.map((att) => (
                      <Checkbox
                        key={att.id}
                        checked={activeLabCase.attachmentIds.includes(att.id)}
                        disabled={disabled}
                        onChange={(next) => toggleAttachmentInActiveLabCase(att.id, next)}
                        label={`${att.fileName} (${(att.sizeBytes / 1024).toFixed(1)} KB)`}
                      />
                    ))}
                  </div>
                </div>
              ) : null}

              {hasTrackerSummary && labCaseSummary ? (
                <LabCaseTrackerCard
                  summary={labCaseSummary}
                  locale={locale}
                  onSummaryChange={onLabCaseSummaryChange}
                  onMarkedRead={onLabCaseMarkedRead}
                />
              ) : null}

              {canShowComments && activeLabCase?.id ? (
                <DetailLabCaseCommentsSection
                  labCaseId={activeLabCase.id}
                  canPost={canPostComments}
                  deferSubmit={commentsDeferSubmit}
                  composerValue={pendingComment}
                  onComposerValueChange={setPendingComment}
                  onError={onCommentError}
                  onMarkRead={onLabCaseMarkedRead}
                  onActivityChange={onLabCaseActivityChange}
                />
              ) : null}

              <div className="space-y-2">
                <p className="text-xs font-medium text-text-secondary">{t('selectLab')}</p>
                <LinkedOrganizationSearchCombobox
                  search={organizationSearch}
                  onSearchChange={onOrganizationSearchChange}
                  organizations={activeLinkedOrganizations}
                  selectedOrganizationId={activeLabCase.destinationOrganizationId}
                  onSelectOrganization={handleSelectOrganization}
                  disabled={disabled}
                  canInviteLab={canInviteLab}
                  onInviteLab={onInviteLab}
                  noPermissionMessage={t('noOrgInvitePermission')}
                />
                {recentOrganizations.length > 0 && (
                  <div className="flex flex-wrap items-center gap-2">
                    <span className="text-xs text-text-muted">{t('recent')}</span>
                    {recentOrganizations.map((o) => (
                      <button
                        key={o.id}
                        type="button"
                        disabled={disabled}
                        onClick={() => onRecentOrganizationPick(o.id)}
                        className="text-xs rounded-[var(--radius-sm)] border border-border/70 px-2 py-1 text-text-secondary hover:text-text-primary hover:border-border focus:outline-none focus-visible:ring-2 focus-visible:ring-primary/35 disabled:opacity-50"
                      >
                        {o.name}
                      </button>
                    ))}
                  </div>
                )}
              </div>

              {prosthesisRows.length > 0 && activeLabCase.destinationOrganizationId ? (
                <div className="space-y-3 border-t border-border/60 pt-3">
                  <p className="text-xs font-medium text-text-secondary">
                    {t('prosthesisTypesTitle')}
                  </p>
                  <label className="block text-xs text-text-muted space-y-1">
                    {t('prosthesisApplyAll')}
                    <select
                      value={applyAllProsthesis}
                      disabled={disabled || prosthesisOptions.length === 0}
                      onChange={(e) => {
                        const code = e.target.value;
                        setApplyAllProsthesis(code);
                        if (code) applyProsthesisToAll(code);
                      }}
                      className={`${FORM_SELECT_CLASS} w-full mt-1`}
                    >
                      <option value="">{t('prosthesisSelectPlaceholder')}</option>
                      {prosthesisOptions.map((opt) => (
                        <option key={opt.code} value={opt.code}>
                          {opt.label}
                        </option>
                      ))}
                    </select>
                  </label>
                  <div className="overflow-x-auto overscroll-x-contain">
                    <table className="w-full text-sm">
                      <thead>
                        <tr className="text-left text-xs text-text-muted">
                          <th className="pb-2 pr-3 font-medium">{t('prosthesisColTooth')}</th>
                          <th className="pb-2 pr-3 font-medium">{t('prosthesisColDetail')}</th>
                          <th className="pb-2 font-medium">{t('prosthesisColType')}</th>
                        </tr>
                      </thead>
                      <tbody>
                        {prosthesisRows.map((row) => {
                          const current =
                            activeLabCase.toothProsthesis.find(
                              (tp) =>
                                tp.detailClientId === row.detailClientId &&
                                tp.tooth === row.tooth,
                            )?.prosthesisTypeCode ?? '';
                          return (
                            <tr key={`${row.detailClientId}-${row.tooth}`} className="border-t border-border/40">
                              <td className="py-2 pr-3 text-text-primary">{row.tooth}</td>
                              <td className="py-2 pr-3 text-text-secondary">
                                {t('detailLabel', { n: row.detailNumber })}
                              </td>
                              <td className="py-2">
                                <select
                                  value={current}
                                  disabled={disabled}
                                  onChange={(e) =>
                                    setToothProsthesis(
                                      row.detailClientId,
                                      row.tooth,
                                      e.target.value,
                                    )
                                  }
                                  className={`${FORM_SELECT_CLASS} w-full min-w-0 sm:min-w-[160px]`}
                                >
                                  <option value="">{t('prosthesisSelectPlaceholder')}</option>
                                  {prosthesisOptions.map((opt) => (
                                    <option key={opt.code} value={opt.code}>
                                      {opt.label}
                                    </option>
                                  ))}
                                </select>
                              </td>
                            </tr>
                          );
                        })}
                      </tbody>
                    </table>
                  </div>
                </div>
              ) : null}

              <div className="flex flex-wrap items-center gap-3 pt-1">
                <Button
                  type="button"
                  variant="primary"
                  className="w-full sm:w-auto"
                  disabled={
                    disabled ||
                    sendBusyId === activeLabCase.clientId ||
                    !activeLabCase.destinationOrganizationId ||
                    !activeLabCase.detailClientId ||
                    !prosthesisComplete
                  }
                  isLoading={sendBusyId === activeLabCase.clientId}
                  onClick={() => onSendLabCase(activeLabCase, pendingComment.trim())}
                >
                  {t('sendToLab')}
                </Button>
              </div>
            </>
          )}
        </div>
      ) : null}
    </div>
  );
}