import { renderHeader } from '../components/header.js';
import { SHINE_CONNECTIONS_LOGO_SRC } from '../components/shine-logo.js';
import { renderUserAvatar } from '../components/avatar-image.js';
import { authService, state } from '../state.js';
import { loadRelationsForPair, loadUserProfileCard } from '../services/user-connections.js';
import { makeProfileLinksRoute } from '../services/shine-routes.js';
import { navigateBack } from '../router.js';

export const pageMeta = { id: 'user', title: 'Профиль' };

function escapeHtml(text) {
  return String(text || '')
    .replaceAll('&', '&')
    .replaceAll('<', '&lt;')
    .replaceAll('>', '&gt;')
    .replaceAll('"', '&quot;')
    .replaceAll("'", '&#39;');
}

function effectiveSocial(flags = {}) {
  if (flags.outCloseFriend) return 'close_friend';
  if (flags.outFriend) return 'friend';
  if (flags.outContact) return 'contact';
  return 'none';
}

function metricHtml({ kind, label, value, glow = false, positionClass = '' }) {
  const numericValue = Number(value || 0);
  return `
    <button
      type="button"
      class="user-profile-metric ${positionClass}${glow ? ' is-glowing' : ''}"
      data-profile-list="${escapeHtml(kind)}"
      aria-label="${escapeHtml(label)}: ${numericValue}"
    >
      <span class="user-profile-metric-circle">${numericValue}</span>
      <span class="user-profile-metric-label">${escapeHtml(label)}</span>
    </button>`;
}

function openProfileSheet(title, html) {
  const root = document.getElementById('modal-root');
  if (!root) return;
  root.innerHTML = `
    <div class="user-profile-sheet-backdrop" id="user-profile-sheet-backdrop">
      <section class="user-profile-sheet" role="dialog" aria-modal="true" aria-label="${escapeHtml(title)}">
        <div class="user-profile-sheet-handle" aria-hidden="true"></div>
        <div class="user-profile-sheet-title">${escapeHtml(title)}</div>
        <div class="user-profile-sheet-content">${html}</div>
      </section>
    </div>`;

  const close = () => {
    if (root.querySelector('#user-profile-sheet-backdrop')) root.innerHTML = '';
  };
  root.querySelector('#user-profile-sheet-backdrop')?.addEventListener('click', (event) => {
    if (event.target?.id === 'user-profile-sheet-backdrop') close();
  });
}

function aboutSheetHtml(card) {
  return `<div class="user-profile-sheet-copy">${escapeHtml(card?.about || 'Не заполнено')}</div>`;
}

function contactsSheetHtml(card) {
  const rows = [
    ['Ссылки', card?.web],
    ['Телефон', card?.phone],
    ['Адрес', card?.address],
  ].filter(([, value]) => String(value || '').trim());

  if (!rows.length) {
    return '<div class="user-profile-sheet-copy is-muted">Не заполнено</div>';
  }
  return rows.map(([label, value]) => `
    <div class="user-profile-contact-row">
      <span>${escapeHtml(label)}</span>
      <b>${escapeHtml(value)}</b>
    </div>`).join('');
}

function addIconHtml() {
  return `
    <svg class="user-profile-action-svg" viewBox="0 0 40 40" aria-hidden="true">
      <path d="M10.5 20.5 17 27l13-14" />
    </svg>`;
}

function relationMenuHtml(flags = {}) {
  const current = effectiveSocial(flags);
  const rows = [
    ['friend', 'Друг'],
    ['close_friend', 'Близкий друг'],
    ['contact', 'Контакт'],
  ];
  return rows.map(([kind, label]) => `
    <button type="button" class="user-profile-add-option${current === kind ? ' is-current' : ''}" data-relation-kind="${kind}">
      <span>${escapeHtml(label)}</span>
      <span class="user-profile-add-option-check" aria-hidden="true">${current === kind ? '✓' : ''}</span>
    </button>`).join('');
}

export function render({ navigate, route, chrome }) {
  const requestedLogin = String(route?.params?.login || '').trim();
  const selfLogin = String(state.session.login || '').trim();
  const screen = document.createElement('section');
  screen.className = 'stack user-profile-screen';

  const header = renderHeader({
    title: requestedLogin || 'Профиль',
    leftAction: { label: '←', onClick: () => navigateBack() },
  });
  header.classList.add('user-profile-header');
  chrome?.setTopbar(header);

  const status = document.createElement('div');
  status.className = 'status-line user-profile-status';
  status.textContent = 'Загрузка профиля...';

  const body = document.createElement('div');
  body.className = 'user-profile-body';
  screen.append(status, body);

  let card = null;
  let relationFlags = null;
  let relationLoadPromise = null;
  let addMenu = null;
  let addActionButton = null;

  function updateRelationUi() {
    if (!addMenu) return;
    addMenu.innerHTML = relationMenuHtml(relationFlags || {});
    const social = effectiveSocial(relationFlags || {});
    addActionButton?.classList.toggle('is-active', social !== 'none');
    addActionButton?.setAttribute('aria-label', social === 'none' ? 'Добавить' : 'Изменить связь');
  }

  async function ensureRelationFlags() {
    if (relationFlags) return relationFlags;
    if (relationLoadPromise) return relationLoadPromise;
    if (!selfLogin || !card?.login) return {};
    relationLoadPromise = loadRelationsForPair({ currentLogin: selfLogin, targetLogin: card.login })
      .then((flags) => {
        relationFlags = flags || {};
        updateRelationUi();
        return relationFlags;
      })
      .finally(() => {
        relationLoadPromise = null;
      });
    return relationLoadPromise;
  }

  async function setRelationKind(kind, enabled) {
    await authService.setUserRelation({
      login: selfLogin,
      toLogin: card.login,
      kind,
      enabled,
      storagePwd: state.session.storagePwdInMemory,
    });
  }

  async function changeSocial(next) {
    const flags = await ensureRelationFlags();
    const current = effectiveSocial(flags);
    if (current === next) return;

    if (next === 'contact') {
      if (flags.outCloseFriend) await setRelationKind('close_friend', false);
      if (flags.outFriend) await setRelationKind('friend', false);
      if (!flags.outContact) await setRelationKind('contact', true);
    }
    if (next === 'friend') {
      if (flags.outCloseFriend) await setRelationKind('close_friend', false);
      if (!flags.outFriend) await setRelationKind('friend', true);
    }
    if (next === 'close_friend' && !flags.outCloseFriend) {
      await setRelationKind('close_friend', true);
    }

    relationFlags = await loadRelationsForPair({ currentLogin: selfLogin, targetLogin: card.login });
    updateRelationUi();
  }

  function renderProfile() {
    if (!card) return;
    const isSelf = card.login.toLowerCase() === selfLogin.toLowerCase();
    const stats = card.stats || {};
    const official = card.accountRole === 'primary';
    const shining = card.shineStatus === 'shining';
    const fullName = [card.firstName, card.lastName]
      .map((value) => String(value || '').trim())
      .filter(Boolean)
      .join(' ');

    const title = header.querySelector('.page-title');
    if (title) title.textContent = card.login;

    body.innerHTML = `
      ${fullName ? `<div class="user-profile-full-name">${escapeHtml(fullName)}</div>` : ''}

      <div class="user-profile-hero" aria-label="Профиль ${escapeHtml(card.login)}">
        ${metricHtml({ kind: 'primary_received', label: 'Официальный', value: stats.primaryReceivedCount, glow: official, positionClass: 'is-top-left' })}
        ${metricHtml({ kind: 'shine_received', label: 'Сияющий', value: stats.shineReceivedCount, glow: shining, positionClass: 'is-top-right' })}
        <div class="user-profile-avatar-slot"></div>
        ${metricHtml({ kind: 'friends', label: 'Друзья', value: stats.friendsCount, positionClass: 'is-bottom-left' })}
        ${metricHtml({ kind: 'close_friends', label: 'Близкие друзья', value: stats.closeFriendsCount, positionClass: 'is-bottom-right' })}
      </div>

      <div class="user-profile-channel-metrics">
        ${metricHtml({ kind: 'channels_following', label: 'Подписки', value: stats.followingChannelsCount, positionClass: 'is-channel-metric' })}
        ${metricHtml({ kind: 'channels_owned', label: 'Каналы', value: stats.ownedPublicChannelsCount, positionClass: 'is-channel-metric' })}
      </div>

      ${!isSelf ? `
        <div class="user-profile-actions-wrap">
          <div class="user-profile-add-menu" hidden></div>
          <div class="user-profile-actions" aria-label="Действия с пользователем">
            <button type="button" class="user-profile-action-btn" data-profile-action="add" aria-label="Добавить" aria-haspopup="menu" aria-expanded="false">
              ${addIconHtml()}
            </button>
            <button type="button" class="user-profile-action-btn is-links" data-profile-action="links" aria-label="Связи" title="Связи">
              <img src="${SHINE_CONNECTIONS_LOGO_SRC}" alt="" aria-hidden="true">
            </button>
            <button type="button" class="user-profile-action-btn" data-profile-action="chat" aria-label="Сообщение" title="Сообщение">
              <img src="/assets/icon_lichnye.png" alt="" aria-hidden="true">
            </button>
          </div>
        </div>` : ''}

      <div class="user-profile-detail-links">
        <button type="button" data-profile-detail="about">О себе</button>
        <button type="button" data-profile-detail="contacts">Контакты</button>
      </div>`;

    const avatarSlot = body.querySelector('.user-profile-avatar-slot');
    avatarSlot?.append(renderUserAvatar({
      login: card.login,
      firstName: card.firstName,
      lastName: card.lastName,
      avatar: card.avatar,
      size: 'xl',
      className: 'user-profile-hero-avatar',
      glow: shining,
    }));

    addMenu = body.querySelector('.user-profile-add-menu');
    addActionButton = body.querySelector('[data-profile-action="add"]');
    updateRelationUi();
    status.textContent = '';

    if (!isSelf && selfLogin) {
      void ensureRelationFlags().catch(() => {});
    }
  }

  body.addEventListener('click', async (event) => {
    if (!card) return;
    const listButton = event.target.closest('[data-profile-list]');
    if (listButton) {
      const kind = listButton.dataset.profileList;
      if (kind) navigate(`SHiNE/${encodeURIComponent(card.login)}/list/${encodeURIComponent(kind)}`);
      return;
    }

    const detailButton = event.target.closest('[data-profile-detail]');
    if (detailButton?.dataset.profileDetail === 'about') {
      openProfileSheet('О себе', aboutSheetHtml(card));
      return;
    }
    if (detailButton?.dataset.profileDetail === 'contacts') {
      openProfileSheet('Контакты', contactsSheetHtml(card));
      return;
    }

    const relationButton = event.target.closest('[data-relation-kind]');
    if (relationButton) {
      if (!selfLogin) {
        status.className = 'status-line user-profile-status is-unavailable';
        status.textContent = 'Для добавления пользователя необходимо войти.';
        return;
      }
      const next = relationButton.dataset.relationKind;
      try {
        addMenu?.classList.add('is-busy');
        await changeSocial(next);
        if (addMenu) addMenu.hidden = true;
        addActionButton?.setAttribute('aria-expanded', 'false');
        status.className = 'status-line user-profile-status';
        status.textContent = '';
      } catch (error) {
        status.className = 'status-line user-profile-status is-unavailable';
        status.textContent = `Ошибка: ${error?.message || 'Не удалось изменить связь'}`;
      } finally {
        addMenu?.classList.remove('is-busy');
      }
      return;
    }

    const actionButton = event.target.closest('[data-profile-action]');
    const action = actionButton?.dataset.profileAction;
    if (action === 'add') {
      if (!addMenu) return;
      navigate(`SHiNE/${encodeURIComponent(card.login)}/manage`);
      return;
    }
    if (action === 'links') {
      navigate(makeProfileLinksRoute(card.login));
      return;
    }
    if (action === 'chat') {
      navigate(`chat/${encodeURIComponent(card.login)}`);
    }
  });

  const handleOutsidePointer = (event) => {
    if (!addMenu || addMenu.hidden) return;
    if (event.target instanceof Node && body.contains(event.target)) {
      const insideActions = event.target.closest?.('.user-profile-actions-wrap');
      if (insideActions) return;
    }
    addMenu.hidden = true;
    addActionButton?.setAttribute('aria-expanded', 'false');
  };
  document.addEventListener('pointerdown', handleOutsidePointer);

  async function refresh() {
    card = await loadUserProfileCard(requestedLogin);
    renderProfile();
  }

  refresh().catch((error) => {
    status.className = 'status-line user-profile-status is-unavailable';
    status.textContent = `Ошибка: ${error?.message || 'unknown'}`;
  });

  screen.cleanup = () => {
    document.removeEventListener('pointerdown', handleOutsidePointer);
    const root = document.getElementById('modal-root');
    if (root?.querySelector('#user-profile-sheet-backdrop')) root.innerHTML = '';
  };

  return screen;
}