'use client';

import { useCallback, useEffect, useMemo, useState } from 'react';
import { ChevronRight, Home, MapPin } from 'lucide-react';
import { AddressFormDialog } from '@/components/addresses/address-form-dialog';
import { ActionTile, SectionTitle } from '@/components/id/action-tile';
import { useAuth } from '@/components/id/auth-provider';
import { useToast } from '@/components/id/toast-provider';
import {
  ADDRESS_LABELS,
  formatAddressLine,
  getOtherAddresses,
  getPrimaryAddress,
  type AddressLabel
} from '@/lib/address-catalog';
import { fetchUserAddresses, getApiErrorMessage, UserAddress } from '@/lib/api';

function AddressRow({ title, text, onClick }: { title: string; text: string; onClick: () => void }) {
  return (
    <button
      type="button"
      onClick={onClick}
      className="flex w-full items-center gap-4 border-b border-[#eceef4] px-4 py-4 text-left transition last:border-b-0 hover:bg-[#fafbfd]"
    >
      <div className="flex h-11 w-11 items-center justify-center rounded-2xl bg-white">
        <MapPin className="h-5 w-5" />
      </div>
      <div className="min-w-0 flex-1">
        <div className="font-medium">{title}</div>
        <div className="truncate text-sm text-[#667085]">{text}</div>
      </div>
      <ChevronRight className="h-5 w-5 shrink-0 text-[#a8adbc]" />
    </button>
  );
}

export function AddressQuickSection({
  layout,
  isPinLocked = false,
  isReady = true
}: {
  layout: 'home' | 'data';
  isPinLocked?: boolean;
  isReady?: boolean;
}) {
  const { user, token } = useAuth();
  const { showToast } = useToast();
  const [addresses, setAddresses] = useState<UserAddress[]>([]);
  const [formOpen, setFormOpen] = useState(false);
  const [activeLabel, setActiveLabel] = useState<AddressLabel>('HOME');
  const [editingAddress, setEditingAddress] = useState<UserAddress | null>(null);

  const loadAddresses = useCallback(async () => {
    if (!user || !token || isPinLocked) return;
    try {
      const response = await fetchUserAddresses(user.id, token);
      setAddresses(response.addresses ?? []);
    } catch (error) {
      const message = getApiErrorMessage(error, 'Не удалось загрузить адреса');
      if (message) showToast(message);
    }
  }, [isPinLocked, showToast, token, user]);

  useEffect(() => {
    if (isReady && user && !isPinLocked) void loadAddresses();
  }, [isPinLocked, isReady, loadAddresses, user]);

  const homeAddress = useMemo(() => getPrimaryAddress(addresses, 'HOME') as UserAddress | null, [addresses]);
  const workAddress = useMemo(() => getPrimaryAddress(addresses, 'WORK') as UserAddress | null, [addresses]);
  const otherAddresses = useMemo(() => getOtherAddresses(addresses), [addresses]);

  function openAddress(label: AddressLabel, existing: UserAddress | null = null) {
    setActiveLabel(label);
    if (label === 'HOME') setEditingAddress(existing ?? homeAddress);
    else if (label === 'WORK') setEditingAddress(existing ?? workAddress);
    else setEditingAddress(existing);
    setFormOpen(true);
  }

  const tiles = (
    <div className={layout === 'home' ? 'grid grid-cols-3 gap-4' : 'mt-4 grid grid-cols-3 gap-3'}>
      <ActionTile
        icon={Home}
        label={ADDRESS_LABELS.HOME.title}
        description={homeAddress ? formatAddressLine(homeAddress) : layout === 'data' ? 'Не указан' : undefined}
        className={layout === 'home' ? 'min-h-[76px]' : 'min-h-[76px]'}
        onClick={() => openAddress('HOME')}
      />
      <ActionTile
        icon={MapPin}
        label={ADDRESS_LABELS.WORK.title}
        description={workAddress ? formatAddressLine(workAddress) : layout === 'data' ? 'Не указан' : undefined}
        className="min-h-[76px]"
        onClick={() => openAddress('WORK')}
      />
      <ActionTile
        icon={MapPin}
        label={ADDRESS_LABELS.OTHER.shortTitle}
        description={
          otherAddresses.length > 0
            ? `${otherAddresses.length} ${otherAddresses.length === 1 ? 'адрес' : otherAddresses.length < 5 ? 'адреса' : 'адресов'}`
            : layout === 'data'
              ? 'Добавить'
              : undefined
        }
        className="min-h-[76px]"
        onClick={() => openAddress('OTHER')}
      />
    </div>
  );

  return (
    <>
      {layout === 'home' ? (
        <>
          <SectionTitle>Адреса</SectionTitle>
          {tiles}
        </>
      ) : (
        <section className="mt-10">
          <h2 className="text-2xl font-medium">Адреса</h2>
          <p className="mt-1 text-sm text-[#667085]">Укажите адреса на карте или введите их вручную.</p>
          {tiles}
          <div className="mt-4 overflow-hidden rounded-[24px] bg-[#f4f5f8]">
            {addresses.length === 0 ? (
              <p className="px-4 py-6 text-center text-sm text-[#667085]">Адреса пока не добавлены</p>
            ) : (
              addresses.map((address) => (
                <AddressRow
                  key={address.id}
                  title={ADDRESS_LABELS[address.label as AddressLabel]?.title ?? address.label}
                  text={formatAddressLine(address)}
                  onClick={() => openAddress(address.label as AddressLabel, address)}
                />
              ))
            )}
          </div>
        </section>
      )}

      {user ? (
        <AddressFormDialog
          open={formOpen}
          onOpenChange={setFormOpen}
          label={activeLabel}
          userId={user.id}
          token={token}
          existing={editingAddress}
          onSaved={loadAddresses}
        />
      ) : null}
    </>
  );
}