import { getContext, setContext } from 'svelte';
import { ProjectManager } from '../project-system/project-manager';
import { ProjectDatabase } from '../project-system/db';
import { createCsoundStore } from '../csound/store';
import { ExecutionContext } from '../csound/execution-context';
import { createEditorSettingsStore } from '../stores/editorSettings';
import { ProjectEditor } from '../stores/projectEditor.svelte';
import { UIState } from '../stores/uiState.svelte';
import type { CsoundStore } from '../csound/store';
import type { EditorSettingsStore } from '../stores/editorSettings';

export interface AppContext {
  projectManager: ProjectManager;
  csound: CsoundStore;
  executionContext: ExecutionContext;
  editorSettings: EditorSettingsStore;
  projectEditor: ProjectEditor;
  uiState: UIState;
}

const APP_CONTEXT_KEY = Symbol('app-context');

export function createAppContext(): AppContext {
  const db = new ProjectDatabase();
  const projectManager = new ProjectManager(db);
  const csound = createCsoundStore();
  const executionContext = new ExecutionContext(csound, 'composition');

  return {
    projectManager,
    csound,
    executionContext,
    editorSettings: createEditorSettingsStore(),
    projectEditor: new ProjectEditor(projectManager),
    uiState: new UIState()
  };
}

export function setAppContext(context: AppContext): void {
  setContext<AppContext>(APP_CONTEXT_KEY, context);
}

export function getAppContext(): AppContext {
  const context = getContext<AppContext>(APP_CONTEXT_KEY);
  if (!context) {
    throw new Error('AppContext not found. Did you forget to call setAppContext?');
  }
  return context;
}