'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 { Dropdown } from '@/components/ui/shared/Dropdown';
import { FORM_SELECT_CLASS } from '@/components/shared/formSelectStyles';
import { SearchBar } from '@/components/ui/shared/SearchBar';
import { CaseSentLabel } from '@/components/ui/treatment/CaseSentLabel';
import { LabCaseCommentsPanel } from '@/components/ui/lab/LabCaseCommentsPanel';
import { treatmentTypeLabelFromCatalog } from '@/components/shared/treatmentTypeDisplay';
import { treatmentsApi } from '@/lib/api/treatments';
import { prosthesisCatalogApi } from '@/lib/api/prosthesis-catalog';
import type { ProsthesisCatalogEntry, TreatmentCatalogEntry } from '@/types/treatment-catalog';
import type { LabCaseDraft, LinkedOrganizationOption, TreatmentDetailDraft } from '@/types/treatment';

interface LabCasesDispatchPanelProps {
  details: TreatmentDetailDraft[];
  activeDetailId: string;
  labCases: LabCaseDraft[];
  labDependentCodes: Set<string>;
  treatmentCatalog: TreatmentCatalogEntry[];
  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;
  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,
  activeLabCaseId,
  onLabCasesChange,
  disabled,
  canEdit,
  orgs,
  organizationSearch,
  onOrganizationSearchChange,
  recentOrganizationIds,
  onRecentOrganizationPick,
  sendBusyId,
  onAddLabCase,
  onSendLabCase,
  onCommentError,
}: LabCasesDispatchPanelProps) {
  const t = useTranslations('treatment');
  const [prosthesisOptions, setProsthesisOptions] = useState<ProsthesisCatalogEntry[]>([]);
  const [applyAllProsthesis, setApplyAllProsthesis] = useState('');
  const [pendingComment, setPendingComment] = useState('');

  const activeLinkedOrganizations = orgs.filter((o) => o.active);
  const filteredOrganizations = (() => {
    const q = organizationSearch.trim().toLowerCase();
    if (!q) return activeLinkedOrganizations;
    return activeLinkedOrganizations.filter((o) => o.name.toLowerCase().includes(q));
  })();
  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 && labDependentCodes.has(activeDetail.treatmentType),
  );

  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] });
  }

  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-4 bg-background-secondary/30">
          {sent ? (
            <>
              <div>
                <p className="text-xs font-medium text-text-secondary mb-2">
                  {t('labShipmentIncludedDetails')}
                </p>
                <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>
              </div>

              {activeLabCase.id ? (
                <LabCaseCommentsPanel
                  caseId={activeLabCase.id}
                  canPost={false}
                  canToggleVisibility={false}
                  loadComments={async () => {
                    const r = await treatmentsApi.listLabCaseComments(activeLabCase.id!);
                    return r.data;
                  }}
                  onPost={async () => {
                    throw new Error('Read-only');
                  }}
                  onError={onCommentError}
                />
              ) : 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}
              />
            </>
          ) : (
            <>
              <div>
                <p className="text-xs font-medium text-text-secondary mb-2">
                  {t('labShipmentIncludedDetails')}
                </p>
                <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>
              </div>

              {!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}

              {activeLabCase.id ? (
                <LabCaseCommentsPanel
                  caseId={activeLabCase.id}
                  canPost={canEdit && !disabled}
                  canToggleVisibility={false}
                  deferSubmit
                  composerValue={pendingComment}
                  onComposerValueChange={setPendingComment}
                  loadComments={async () => {
                    const r = await treatmentsApi.listLabCaseComments(activeLabCase.id!);
                    return r.data;
                  }}
                  onPost={async (body) => {
                    const r = await treatmentsApi.addLabCaseComment(activeLabCase.id!, { body });
                    return r.data;
                  }}
                  onError={onCommentError}
                />
              ) : null}

              <div className="space-y-2">
                <p className="text-xs font-medium text-text-secondary">{t('selectLab')}</p>
                <SearchBar
                  embedded
                  value={organizationSearch}
                  onChange={onOrganizationSearchChange}
                  placeholder={t('searchOrgsPlaceholder')}
                />
                {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>
                )}
                <Dropdown
                  value={activeLabCase.destinationOrganizationId ?? ''}
                  onChange={(e) => {
                    const nextOrgId = e.target.value || null;
                    updateActiveLabCase({
                      destinationOrganizationId: nextOrgId,
                      toothProsthesis: [],
                    });
                    setApplyAllProsthesis('');
                  }}
                  disabled={disabled || filteredOrganizations.length === 0}
                >
                  <option value="">{t('selectLabPlaceholder')}</option>
                  {filteredOrganizations.map((o) => (
                    <option key={o.id} value={o.id}>
                      {o.name}
                    </option>
                  ))}
                </Dropdown>
                {filteredOrganizations.length === 0 && (
                  <p className="text-xs text-text-muted">{t('noOrgMatch')}</p>
                )}
              </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={`${FORM_SELECT_CLASS} w-full mt-1`}
                    >
                      <option value="">{t('prosthesisSelectPlaceholder')}</option>
                      {prosthesisOptions.map((opt) => (
                        <option key={opt.code} value={opt.code}>
                          {opt.label}
                        </option>
                      ))}
                    </select>
                  </label>
                  <div className="overflow-x-auto">
                    <table className="w-full text-sm">
                      <thead>
                        <tr className="text-left text-xs text-text-muted">
                          <th className="pb-2 pr-3 font-medium">{t('prosthesisColTooth')}</th>
                          <th className="pb-2 pr-3 font-medium">{t('prosthesisColDetail')}</th>
                          <th className="pb-2 font-medium">{t('prosthesisColType')}</th>
                        </tr>
                      </thead>
                      <tbody>
                        {prosthesisRows.map((row) => {
                          const current =
                            activeLabCase.toothProsthesis.find(
                              (tp) =>
                                tp.detailClientId === row.detailClientId &&
                                tp.tooth === row.tooth,
                            )?.prosthesisTypeCode ?? '';
                          return (
                            <tr key={`${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"
                  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>
  );
}