// Mythic Oracle — entry, sidebar routing, campaign context

import { getCampaign, updateCampaign } from './api.js';

const STORAGE_KEYS = {
  sidebarCollapsed: 'mo-sidebar-collapsed',
  activeView: 'mo-active-view',
  theme: 'mo-theme',
  activeCampaignId: 'mo-active-campaign-id',
};

const CHAOS_MIN = 1;
const CHAOS_MAX = 9;

let activeCampaign = null;
let navigateToView = null;

function initSidebarCollapse() {
  const sidebar = document.getElementById('sidebar');
  const toggle = document.getElementById('collapseToggle');

  const collapsed = localStorage.getItem(STORAGE_KEYS.sidebarCollapsed) === 'true';
  sidebar.classList.toggle('collapsed', collapsed);

  toggle.addEventListener('click', () => {
    const isCollapsed = sidebar.classList.toggle('collapsed');
    localStorage.setItem(STORAGE_KEYS.sidebarCollapsed, isCollapsed);
  });
}

function initNavRouting() {
  const navItems = document.querySelectorAll('.nav-item[data-view]');
  const views = document.querySelectorAll('.view');

  function activateView(viewId) {
    navItems.forEach((item) => {
      item.classList.toggle('active', item.dataset.view === viewId);
    });
    views.forEach((view) => {
      view.classList.toggle('active', view.id === `view-${viewId}`);
    });
    localStorage.setItem(STORAGE_KEYS.activeView, viewId);
  }

  navItems.forEach((item) => {
    item.addEventListener('click', () => activateView(item.dataset.view));
  });

  navigateToView = activateView;

  const savedView = localStorage.getItem(STORAGE_KEYS.activeView);
  const validView = savedView && document.getElementById(`view-${savedView}`);
  activateView(validView ? savedView : 'oracle');
}

function initThemeToggle() {
  const toggle = document.getElementById('themeToggle');
  const root = document.documentElement;

  const savedTheme = localStorage.getItem(STORAGE_KEYS.theme) || 'dark';
  root.setAttribute('data-theme', savedTheme);

  toggle.addEventListener('click', () => {
    const nextTheme = root.getAttribute('data-theme') === 'dark' ? 'light' : 'dark';
    root.setAttribute('data-theme', nextTheme);
    localStorage.setItem(STORAGE_KEYS.theme, nextTheme);
  });
}

function renderChaosFactor() {
  const value = document.getElementById('chaosValue');
  value.textContent = activeCampaign ? activeCampaign.chaos_factor : '—';
}

function renderActiveCampaignName() {
  const el = document.getElementById('activeCampaignName');
  el.textContent = activeCampaign ? activeCampaign.name : 'No active campaign';
}

function initChaosFactorControls() {
  const minus = document.getElementById('chaosMinus');
  const plus = document.getElementById('chaosPlus');

  async function adjust(delta) {
    if (!activeCampaign) return;

    const next = Math.min(CHAOS_MAX, Math.max(CHAOS_MIN, activeCampaign.chaos_factor + delta));
    if (next === activeCampaign.chaos_factor) return;

    const updated = await updateCampaign(activeCampaign.id, { chaos_factor: next });
    activeCampaign = updated;
    renderChaosFactor();
  }

  minus.addEventListener('click', () => adjust(-1));
  plus.addEventListener('click', () => adjust(1));
}

export async function setActiveCampaign(campaign) {
  if (!campaign) {
    activeCampaign = null;
    localStorage.removeItem(STORAGE_KEYS.activeCampaignId);
    renderChaosFactor();
    renderActiveCampaignName();
    return;
  }

  // Always re-fetch: the passed-in object (e.g. from a cached list) may be
  // stale if the chaos factor was changed elsewhere since it was loaded.
  const fresh = await getCampaign(campaign.id);
  activeCampaign = fresh;
  localStorage.setItem(STORAGE_KEYS.activeCampaignId, fresh.id);
  renderChaosFactor();
  renderActiveCampaignName();
}

export function getActiveCampaign() {
  return activeCampaign;
}

async function initActiveCampaign() {
  const savedId = localStorage.getItem(STORAGE_KEYS.activeCampaignId);

  if (!savedId) {
    renderChaosFactor();
    renderActiveCampaignName();
    navigateToView('campaign-management');
    return;
  }

  try {
    await setActiveCampaign({ id: savedId });
  } catch {
    await setActiveCampaign(null);
    navigateToView('campaign-management');
  }
}

async function init() {
  initSidebarCollapse();
  initNavRouting();
  initThemeToggle();
  initChaosFactorControls();
  await initActiveCampaign();
}

document.addEventListener('DOMContentLoaded', init);