/**
 * Project tabs store — per-project tab state.
 *
 * Tracks which tab is active and which tabs have been activated (PERSISTED-LAZY
 * pattern) for each project card. This allows cross-component access — e.g.,
 * StatusBar can show which tab is active, palette commands can switch tabs.
 */

// ── Types ────────────────────────────────────────────────────────────────

export type ProjectTab =
  | 'model' | 'docs' | 'context' | 'files'
  | 'ssh' | 'memory' | 'comms' | 'tasks';

export const ALL_TABS: ProjectTab[] = [
  'model', 'docs', 'context', 'files', 'ssh', 'memory', 'comms', 'tasks',
];

interface TabState {
  activeTab: ProjectTab;
  activatedTabs: Set<ProjectTab>;
}

// ── State ────────────────────────────────────────────────────────────────

let _tabs = $state<Map<string, TabState>>(new Map());

// ── Internal helper ──────────────────────────────────────────────────────

function ensureEntry(projectId: string): TabState {
  let entry = _tabs.get(projectId);
  if (!entry) {
    entry = { activeTab: 'model', activatedTabs: new Set(['model']) };
    _tabs.set(projectId, entry);
    // Trigger reactivity by reassigning the map
    _tabs = new Map(_tabs);
  }
  return entry;
}

// ── Getters ──────────────────────────────────────────────────────────────

export function getActiveTab(projectId: string): ProjectTab {
  return _tabs.get(projectId)?.activeTab ?? 'model';
}

export function isTabActivated(projectId: string, tab: ProjectTab): boolean {
  return _tabs.get(projectId)?.activatedTabs.has(tab) ?? (tab === 'model');
}

// ── Actions ──────────────────────────────────────────────────────────────

export function setActiveTab(projectId: string, tab: ProjectTab): void {
  const entry = ensureEntry(projectId);
  entry.activeTab = tab;
  entry.activatedTabs = new Set([...entry.activatedTabs, tab]);
  // Trigger reactivity
  _tabs = new Map(_tabs);
}

/** Remove tab state when a project is deleted. */
export function removeProject(projectId: string): void {
  if (_tabs.has(projectId)) {
    _tabs.delete(projectId);
    _tabs = new Map(_tabs);
  }
}