'use client';

import { useState } from 'react';

import { useRouter } from 'next/navigation';

import { formatDate } from '@kit/shared/dates';
import { Badge } from '@kit/ui/badge';
import { Button } from '@kit/ui/button';
import { Card, CardContent, CardHeader, CardTitle } from '@kit/ui/card';
import { Input } from '@kit/ui/input';
import { Label } from '@kit/ui/label';
import { Tabs, TabsContent, TabsList, TabsTrigger } from '@kit/ui/tabs';
import { useActionWithToast } from '@kit/ui/use-action-with-toast';

import {
  STATUS_LABELS,
  getMemberStatusColor,
  formatIban,
  computeAge,
  computeMembershipYears,
} from '../lib/member-utils';
import {
  createMemberRole,
  deleteMemberRole,
  createMemberHonor,
  deleteMemberHonor,
  createMandate,
  revokeMandate,
} from '../server/actions/member-actions';
import { MemberDetailHeader } from './member-detail-header';

interface MemberRole {
  id: string;
  role_name: string;
  from_date: string | null;
  until_date: string | null;
  is_active: boolean;
}

interface MemberHonor {
  id: string;
  honor_name: string;
  honor_date: string | null;
  description: string | null;
}

interface SepaMandate {
  id: string;
  mandate_reference: string;
  iban: string;
  bic: string | null;
  account_holder: string;
  mandate_date: string;
  status: string;
  is_primary: boolean;
  sequence: string;
}

interface MemberDetailTabsProps {
  member: Record<string, unknown>;
  account: string;
  accountId: string;
  roles?: MemberRole[];
  honors?: MemberHonor[];
  mandates?: SepaMandate[];
}

function DetailRow({
  label,
  value,
}: {
  label: string;
  value: React.ReactNode;
}) {
  return (
    <div className="flex items-start justify-between gap-4 border-b py-2 last:border-b-0">
      <span className="text-muted-foreground text-sm font-medium">{label}</span>
      <span className="text-right text-sm">{value ?? '—'}</span>
    </div>
  );
}

export function MemberDetailTabs({
  member,
  account,
  accountId,
  roles = [],
  honors = [],
  mandates = [],
}: MemberDetailTabsProps) {
  const memberId = String(member.id);
  const status = String(member.status ?? 'active');
  const age = computeAge(member.date_of_birth as string | null);
  const membershipYears = computeMembershipYears(
    member.entry_date as string | null,
  );

  return (
    <div className="space-y-6">
      <MemberDetailHeader
        member={member}
        account={account}
        accountId={accountId}
      />

      <Tabs defaultValue="stammdaten">
        <TabsList variant="line">
          <TabsTrigger value="stammdaten">Stammdaten</TabsTrigger>
          <TabsTrigger value="mitgliedschaft">Mitgliedschaft</TabsTrigger>
          <TabsTrigger value="finanzen">Finanzen</TabsTrigger>
          <TabsTrigger value="funktionen">
            Funktionen & Ehrungen
            {(roles.length > 0 || honors.length > 0) && (
              <Badge
                variant="secondary"
                className="ml-1.5 h-5 min-w-5 px-1 text-xs"
              >
                {roles.length + honors.length}
              </Badge>
            )}
          </TabsTrigger>
          <TabsTrigger value="datenschutz">Datenschutz</TabsTrigger>
        </TabsList>

        {/* Tab 1: Stammdaten */}
        <TabsContent value="stammdaten">
          <div className="grid gap-6 pt-4 md:grid-cols-2">
            <Card>
              <CardHeader>
                <CardTitle>Persönliche Daten</CardTitle>
              </CardHeader>
              <CardContent>
                <DetailRow
                  label="Vorname"
                  value={String(member.first_name ?? '—')}
                />
                <DetailRow
                  label="Nachname"
                  value={String(member.last_name ?? '—')}
                />
                <DetailRow
                  label="Anrede"
                  value={String(member.salutation ?? '—')}
                />
                <DetailRow label="Titel" value={String(member.title ?? '—')} />
                <DetailRow
                  label="Geburtsdatum"
                  value={
                    member.date_of_birth
                      ? `${formatDate(String(member.date_of_birth))}${age !== null ? ` (${age} Jahre)` : ''}`
                      : '—'
                  }
                />
                <DetailRow
                  label="Geburtsort"
                  value={String(member.birthplace ?? '—')}
                />
                <DetailRow
                  label="Geschlecht"
                  value={
                    member.gender
                      ? { male: 'Männlich', female: 'Weiblich', diverse: 'Divers' }[member.gender as string] ?? String(member.gender)
                      : '—'
                  }
                />
              </CardContent>
            </Card>

            <Card>
              <CardHeader>
                <CardTitle>Kontakt</CardTitle>
              </CardHeader>
              <CardContent>
                <DetailRow label="E-Mail" value={String(member.email ?? '—')} />
                <DetailRow
                  label="Telefon"
                  value={String(member.phone ?? '—')}
                />
                <DetailRow label="Mobil" value={String(member.mobile ?? '—')} />
                <DetailRow
                  label="Telefon 2"
                  value={String(member.phone2 ?? '—')}
                />
                <DetailRow label="Fax" value={String(member.fax ?? '—')} />
              </CardContent>
            </Card>

            <Card className="md:col-span-2">
              <CardHeader>
                <CardTitle>Adresse</CardTitle>
              </CardHeader>
              <CardContent>
                <DetailRow
                  label="Straße"
                  value={
                    member.street
                      ? `${member.street}${member.house_number ? ` ${member.house_number}` : ''}`
                      : '—'
                  }
                />
                {Boolean(member.street2) && (
                  <DetailRow
                    label="Adresszusatz"
                    value={String(member.street2)}
                  />
                )}
                <DetailRow
                  label="PLZ / Ort"
                  value={
                    member.postal_code || member.city
                      ? `${member.postal_code ?? ''} ${member.city ?? ''}`.trim()
                      : '—'
                  }
                />
                <DetailRow
                  label="Land"
                  value={
                    (() => {
                      const code = String(member.country ?? 'DE');
                      const countries: Record<string, string> = {
                        DE: 'Deutschland', AT: 'Österreich', CH: 'Schweiz',
                        LI: 'Liechtenstein', LU: 'Luxemburg', IT: 'Italien',
                        FR: 'Frankreich', NL: 'Niederlande', BE: 'Belgien',
                        PL: 'Polen', CZ: 'Tschechien', DK: 'Dänemark',
                      };
                      return countries[code] ?? code;
                    })()
                  }
                />
              </CardContent>
            </Card>

            {/* Guardian info for youth members */}
            {Boolean(member.is_youth) && (
              <Card className="md:col-span-2">
                <CardHeader>
                  <CardTitle>Erziehungsberechtigte/r</CardTitle>
                </CardHeader>
                <CardContent>
                  <DetailRow
                    label="Name"
                    value={String(member.guardian_name ?? '—')}
                  />
                  <DetailRow
                    label="Telefon"
                    value={String(member.guardian_phone ?? '—')}
                  />
                  <DetailRow
                    label="E-Mail"
                    value={String(member.guardian_email ?? '—')}
                  />
                </CardContent>
              </Card>
            )}
          </div>
        </TabsContent>

        {/* Tab 2: Mitgliedschaft */}
        <TabsContent value="mitgliedschaft">
          <div className="grid gap-6 pt-4 md:grid-cols-2">
            <Card>
              <CardHeader>
                <CardTitle>Mitgliedschaft</CardTitle>
              </CardHeader>
              <CardContent>
                <DetailRow
                  label="Mitgliedsnr."
                  value={String(member.member_number ?? '—')}
                />
                <DetailRow
                  label="Status"
                  value={
                    <Badge variant={getMemberStatusColor(status)}>
                      {STATUS_LABELS[status] ?? status}
                    </Badge>
                  }
                />
                <DetailRow
                  label="Eintrittsdatum"
                  value={
                    member.entry_date
                      ? formatDate(String(member.entry_date))
                      : '—'
                  }
                />
                <DetailRow
                  label="Mitgliedsjahre"
                  value={
                    membershipYears > 0
                      ? `${membershipYears} Jahre`
                      : '< 1 Jahr'
                  }
                />
                {Boolean(member.exit_date) && (
                  <>
                    <DetailRow
                      label="Austrittsdatum"
                      value={formatDate(String(member.exit_date))}
                    />
                    <DetailRow
                      label="Austrittsgrund"
                      value={String(member.exit_reason ?? '—')}
                    />
                  </>
                )}
              </CardContent>
            </Card>

            <Card>
              <CardHeader>
                <CardTitle>Merkmale</CardTitle>
              </CardHeader>
              <CardContent>
                <div className="flex flex-wrap gap-2 py-2">
                  {Boolean(member.is_honorary) && <Badge>Ehrenmitglied</Badge>}
                  {Boolean(member.is_founding_member) && (
                    <Badge>Gründungsmitglied</Badge>
                  )}
                  {Boolean(member.is_youth) && <Badge>Jugend</Badge>}
                  {Boolean(member.is_retiree) && <Badge>Senior</Badge>}
                  {Boolean(member.is_probationary) && (
                    <Badge variant="outline">Probezeit</Badge>
                  )}
                  {Boolean(member.is_transferred) && (
                    <Badge variant="outline">Überweisung</Badge>
                  )}
                  {!member.is_honorary &&
                    !member.is_founding_member &&
                    !member.is_youth &&
                    !member.is_retiree &&
                    !member.is_probationary &&
                    !member.is_transferred && (
                      <span className="text-muted-foreground text-sm">
                        Keine besonderen Merkmale
                      </span>
                    )}
                </div>
                {Boolean(member.notes) && (
                  <div className="border-t pt-3">
                    <p className="text-muted-foreground mb-1 text-xs font-medium">
                      Notizen
                    </p>
                    <p className="text-sm whitespace-pre-wrap">
                      {String(member.notes)}
                    </p>
                  </div>
                )}
              </CardContent>
            </Card>
          </div>
        </TabsContent>

        {/* Tab 3: Finanzen */}
        <TabsContent value="finanzen">
          <div className="space-y-6 pt-4">
            <Card>
              <CardHeader>
                <CardTitle>Bankverbindung</CardTitle>
              </CardHeader>
              <CardContent>
                <DetailRow
                  label="IBAN"
                  value={formatIban(member.iban as string | null)}
                />
                <DetailRow label="BIC" value={String(member.bic ?? '—')} />
                <DetailRow
                  label="Kontoinhaber"
                  value={String(member.account_holder ?? '—')}
                />
              </CardContent>
            </Card>

            <MandatesSection
              mandates={mandates}
              memberId={memberId}
              accountId={accountId}
            />
          </div>
        </TabsContent>

        {/* Tab 4: Funktionen & Ehrungen */}
        <TabsContent value="funktionen">
          <div className="space-y-6 pt-4">
            <RolesSection
              roles={roles}
              memberId={memberId}
              accountId={accountId}
            />
            <HonorsSection
              honors={honors}
              memberId={memberId}
              accountId={accountId}
            />
          </div>
        </TabsContent>

        {/* Tab 5: Datenschutz */}
        <TabsContent value="datenschutz">
          <div className="grid gap-6 pt-4 md:grid-cols-2">
            <Card>
              <CardHeader>
                <CardTitle>DSGVO-Einwilligungen</CardTitle>
              </CardHeader>
              <CardContent>
                <ConsentRow
                  label="Allgemeine Einwilligung"
                  value={Boolean(member.gdpr_consent)}
                />
                <ConsentRow
                  label="Newsletter"
                  value={Boolean(member.gdpr_newsletter)}
                />
                <ConsentRow
                  label="Internetveröffentlichung"
                  value={Boolean(member.gdpr_internet)}
                />
                <ConsentRow
                  label="Printveröffentlichung"
                  value={Boolean(member.gdpr_print)}
                />
                <ConsentRow
                  label="Geburtstagsinfo"
                  value={Boolean(member.gdpr_birthday_info)}
                />
                {Boolean(member.gdpr_consent_date) && (
                  <DetailRow
                    label="Einwilligungsdatum"
                    value={formatDate(String(member.gdpr_consent_date))}
                  />
                )}
              </CardContent>
            </Card>

            <Card>
              <CardHeader>
                <CardTitle>Datenqualität</CardTitle>
              </CardHeader>
              <CardContent>
                <ConsentRow
                  label="Adresse gültig"
                  value={!member.address_invalid}
                />
                <ConsentRow
                  label="Datenabgleich nötig"
                  value={Boolean(member.data_reconciliation_needed)}
                  invert
                />
                <DetailRow
                  label="Online-Zugang"
                  value={member.user_id ? 'Verknüpft' : 'Nicht verknüpft'}
                />
                <DetailRow
                  label="Zugang gesperrt"
                  value={member.online_access_blocked ? 'Ja' : 'Nein'}
                />
              </CardContent>
            </Card>
          </div>
        </TabsContent>
      </Tabs>
    </div>
  );
}

/* ─── Consent Row ─── */

function ConsentRow({
  label,
  value,
  invert,
}: {
  label: string;
  value: boolean;
  invert?: boolean;
}) {
  const isGood = invert ? !value : value;
  return (
    <div className="flex items-center justify-between border-b py-2 last:border-b-0">
      <span className="text-muted-foreground text-sm font-medium">{label}</span>
      <Badge variant={isGood ? 'default' : 'secondary'}>
        {value ? 'Ja' : 'Nein'}
      </Badge>
    </div>
  );
}

/* ─── Roles Section ─── */

function RolesSection({
  roles,
  memberId,
  accountId,
}: {
  roles: MemberRole[];
  memberId: string;
  accountId: string;
}) {
  const router = useRouter();
  const [showForm, setShowForm] = useState(false);
  const [roleName, setRoleName] = useState('');
  const [fromDate, setFromDate] = useState('');
  const [untilDate, setUntilDate] = useState('');

  const { execute: executeCreate, isPending: isCreating } = useActionWithToast(
    createMemberRole,
    {
      successMessage: 'Funktion erstellt',
      onSuccess: () => {
        setShowForm(false);
        setRoleName('');
        setFromDate('');
        setUntilDate('');
        router.refresh();
      },
    },
  );

  const { execute: executeDeleteRole } = useActionWithToast(deleteMemberRole, {
    successMessage: 'Funktion gelöscht',
    onSuccess: () => router.refresh(),
  });

  return (
    <Card>
      <CardHeader className="flex flex-row items-center justify-between">
        <CardTitle>Funktionen</CardTitle>
        <Button
          variant="outline"
          size="sm"
          onClick={() => setShowForm(!showForm)}
          data-test="add-role-btn"
        >
          {showForm ? 'Abbrechen' : '+ Funktion'}
        </Button>
      </CardHeader>
      <CardContent>
        {showForm && (
          <div className="mb-4 space-y-3 rounded-lg border p-3">
            <div>
              <Label className="text-xs">Bezeichnung</Label>
              <Input
                value={roleName}
                onChange={(e) => setRoleName(e.target.value)}
                placeholder="z.B. Kassier"
                data-test="role-name-input"
              />
            </div>
            <div className="flex gap-2">
              <div className="flex-1">
                <Label className="text-xs">Von</Label>
                <Input
                  type="date"
                  value={fromDate}
                  onChange={(e) => setFromDate(e.target.value)}
                />
              </div>
              <div className="flex-1">
                <Label className="text-xs">Bis</Label>
                <Input
                  type="date"
                  value={untilDate}
                  onChange={(e) => setUntilDate(e.target.value)}
                />
              </div>
            </div>
            <Button
              size="sm"
              disabled={!roleName || isCreating}
              onClick={() =>
                executeCreate({
                  memberId,
                  accountId,
                  roleName,
                  fromDate: fromDate || undefined,
                  untilDate: untilDate || undefined,
                })
              }
              data-test="save-role-btn"
            >
              Speichern
            </Button>
          </div>
        )}

        {roles.length > 0 ? (
          <div className="space-y-2">
            {roles.map((role) => (
              <div
                key={role.id}
                className="flex items-center justify-between rounded-md border px-3 py-2"
              >
                <div>
                  <p className="text-sm font-medium">{role.role_name}</p>
                  <p className="text-muted-foreground text-xs">
                    {role.from_date ? formatDate(role.from_date) : '—'}
                    {' — '}
                    {role.until_date ? formatDate(role.until_date) : 'heute'}
                  </p>
                </div>
                <Button
                  variant="ghost"
                  size="sm"
                  className="text-destructive h-8"
                  onClick={() => executeDeleteRole({ roleId: role.id })}
                >
                  Löschen
                </Button>
              </div>
            ))}
          </div>
        ) : (
          <p className="text-muted-foreground text-sm">
            Keine Funktionen zugewiesen.
          </p>
        )}
      </CardContent>
    </Card>
  );
}

/* ─── Honors Section ─── */

function HonorsSection({
  honors,
  memberId,
  accountId,
}: {
  honors: MemberHonor[];
  memberId: string;
  accountId: string;
}) {
  const router = useRouter();
  const [showForm, setShowForm] = useState(false);
  const [honorName, setHonorName] = useState('');
  const [honorDate, setHonorDate] = useState('');
  const [description, setDescription] = useState('');

  const { execute: executeCreate, isPending: isCreating } = useActionWithToast(
    createMemberHonor,
    {
      successMessage: 'Ehrung erstellt',
      onSuccess: () => {
        setShowForm(false);
        setHonorName('');
        setHonorDate('');
        setDescription('');
        router.refresh();
      },
    },
  );

  const { execute: executeDeleteHonor } = useActionWithToast(
    deleteMemberHonor,
    {
      successMessage: 'Ehrung gelöscht',
      onSuccess: () => router.refresh(),
    },
  );

  return (
    <Card>
      <CardHeader className="flex flex-row items-center justify-between">
        <CardTitle>Ehrungen</CardTitle>
        <Button
          variant="outline"
          size="sm"
          onClick={() => setShowForm(!showForm)}
          data-test="add-honor-btn"
        >
          {showForm ? 'Abbrechen' : '+ Ehrung'}
        </Button>
      </CardHeader>
      <CardContent>
        {showForm && (
          <div className="mb-4 space-y-3 rounded-lg border p-3">
            <div>
              <Label className="text-xs">Bezeichnung</Label>
              <Input
                value={honorName}
                onChange={(e) => setHonorName(e.target.value)}
                placeholder="z.B. 25 Jahre Mitgliedschaft"
                data-test="honor-name-input"
              />
            </div>
            <div>
              <Label className="text-xs">Datum</Label>
              <Input
                type="date"
                value={honorDate}
                onChange={(e) => setHonorDate(e.target.value)}
              />
            </div>
            <div>
              <Label className="text-xs">Beschreibung</Label>
              <Input
                value={description}
                onChange={(e) => setDescription(e.target.value)}
                placeholder="Optional"
              />
            </div>
            <Button
              size="sm"
              disabled={!honorName || isCreating}
              onClick={() =>
                executeCreate({
                  memberId,
                  accountId,
                  honorName,
                  honorDate: honorDate || undefined,
                  description: description || undefined,
                })
              }
              data-test="save-honor-btn"
            >
              Speichern
            </Button>
          </div>
        )}

        {honors.length > 0 ? (
          <div className="space-y-2">
            {honors.map((honor) => (
              <div
                key={honor.id}
                className="flex items-center justify-between rounded-md border px-3 py-2"
              >
                <div>
                  <p className="text-sm font-medium">{honor.honor_name}</p>
                  <p className="text-muted-foreground text-xs">
                    {honor.honor_date ? formatDate(honor.honor_date) : '—'}
                    {honor.description && ` — ${honor.description}`}
                  </p>
                </div>
                <Button
                  variant="ghost"
                  size="sm"
                  className="text-destructive h-8"
                  onClick={() => executeDeleteHonor({ honorId: honor.id })}
                >
                  Löschen
                </Button>
              </div>
            ))}
          </div>
        ) : (
          <p className="text-muted-foreground text-sm">
            Keine Ehrungen vorhanden.
          </p>
        )}
      </CardContent>
    </Card>
  );
}

/* ─── Mandates Section ─── */

function MandatesSection({
  mandates,
  memberId,
  accountId,
}: {
  mandates: SepaMandate[];
  memberId: string;
  accountId: string;
}) {
  const router = useRouter();
  const [showForm, setShowForm] = useState(false);
  const [mandateRef, setMandateRef] = useState('');
  const [iban, setIban] = useState('');
  const [bic, setBic] = useState('');
  const [holder, setHolder] = useState('');
  const [mandateDate, setMandateDate] = useState(
    new Date().toISOString().split('T')[0]!,
  );

  const { execute: executeCreate, isPending: isCreating } = useActionWithToast(
    createMandate,
    {
      successMessage: 'Mandat erstellt',
      onSuccess: () => {
        setShowForm(false);
        setMandateRef('');
        setIban('');
        setBic('');
        setHolder('');
        router.refresh();
      },
    },
  );

  const { execute: executeRevoke } = useActionWithToast(revokeMandate, {
    successMessage: 'Mandat widerrufen',
    onSuccess: () => router.refresh(),
  });

  return (
    <Card>
      <CardHeader className="flex flex-row items-center justify-between">
        <CardTitle>SEPA-Mandate</CardTitle>
        <Button
          variant="outline"
          size="sm"
          onClick={() => setShowForm(!showForm)}
          data-test="add-mandate-btn"
        >
          {showForm ? 'Abbrechen' : '+ Mandat'}
        </Button>
      </CardHeader>
      <CardContent>
        {showForm && (
          <div className="mb-4 space-y-3 rounded-lg border p-3">
            <div className="grid gap-3 sm:grid-cols-2">
              <div>
                <Label className="text-xs">Mandatsreferenz</Label>
                <Input
                  value={mandateRef}
                  onChange={(e) => setMandateRef(e.target.value)}
                  data-test="mandate-ref-input"
                />
              </div>
              <div>
                <Label className="text-xs">Datum</Label>
                <Input
                  type="date"
                  value={mandateDate}
                  onChange={(e) => setMandateDate(e.target.value)}
                />
              </div>
              <div>
                <Label className="text-xs">IBAN</Label>
                <Input
                  value={iban}
                  onChange={(e) => setIban(e.target.value)}
                  data-test="mandate-iban-input"
                />
              </div>
              <div>
                <Label className="text-xs">BIC</Label>
                <Input value={bic} onChange={(e) => setBic(e.target.value)} />
              </div>
              <div className="sm:col-span-2">
                <Label className="text-xs">Kontoinhaber</Label>
                <Input
                  value={holder}
                  onChange={(e) => setHolder(e.target.value)}
                  data-test="mandate-holder-input"
                />
              </div>
            </div>
            <Button
              size="sm"
              disabled={!mandateRef || !iban || !holder || isCreating}
              onClick={() =>
                executeCreate({
                  memberId,
                  accountId,
                  mandateReference: mandateRef,
                  iban,
                  bic: bic || undefined,
                  accountHolder: holder,
                  mandateDate,
                })
              }
              data-test="save-mandate-btn"
            >
              Speichern
            </Button>
          </div>
        )}

        {mandates.length > 0 ? (
          <div className="space-y-2">
            {mandates.map((m) => (
              <div
                key={m.id}
                className="flex items-center justify-between rounded-md border px-3 py-2"
              >
                <div>
                  <div className="flex items-center gap-2">
                    <p className="text-sm font-medium">{m.mandate_reference}</p>
                    <Badge
                      variant={m.status === 'active' ? 'default' : 'secondary'}
                    >
                      {m.status}
                    </Badge>
                    {m.is_primary && <Badge variant="outline">Primär</Badge>}
                  </div>
                  <p className="text-muted-foreground text-xs">
                    {formatIban(m.iban)} — {m.account_holder}
                  </p>
                </div>
                {m.status === 'active' && (
                  <Button
                    variant="ghost"
                    size="sm"
                    className="text-destructive h-8"
                    onClick={() => executeRevoke({ mandateId: m.id })}
                  >
                    Widerrufen
                  </Button>
                )}
              </div>
            ))}
          </div>
        ) : (
          <p className="text-muted-foreground text-sm">
            Keine SEPA-Mandate vorhanden.
          </p>
        )}
      </CardContent>
    </Card>
  );
}