// Global application state with simple pub/sub

const _listeners = {};

export const state = {
  project: null,          // { id, name, createdAt }
  auth: {
    adobe: false,
    docusign: false,
    adobeLabel: 'Adobe Sign',
    docusignLabel: 'DocuSign',
  },
  templates: [],          // [{ adobe_id, name, status, blockers, warnings, ... }]
  selectedIds: new Set(),
  lastMigrationResults: null,   // final batch job results
  issueCount: 0,          // blocked template count (drives nav badge)
};

// Subscribe to state key changes: fn is called with (newValue, oldValue)
export function subscribe(key, fn) {
  if (!_listeners[key]) _listeners[key] = [];
  _listeners[key].push(fn);
}

// Publish a state change
export function publish(key, newValue) {
  const old = state[key];
  state[key] = newValue;
  (_listeners[key] || []).forEach(fn => {
    try { fn(newValue, old); } catch (e) { console.error('state listener error', e); }
  });
}

// Convenience setter that publishes
export function setState(key, value) {
  publish(key, value);
}

// Recompute derived values after template list updates
export function updateDerivedState() {
  const blocked = state.templates.filter(t => t.blockers && t.blockers.length > 0).length;
  setState('issueCount', blocked);
}