// Test folder navigation stack functionality
const { test } = require('node:test');
const assert = require('assert');
const AppState = require('./utils/renderer/AppState');

test('AppState navigation stack starts empty', () => {
  const state = new AppState();
  
  assert.strictEqual(state.navigationStack.length, 0, 'Navigation stack should start empty');
  assert.strictEqual(state.currentDepth, 0, 'Current depth should start at 0');
});

test('AppState can add directories to navigation stack', () => {
  const state = new AppState();
  
  // Add first directory
  state.addToNavigationStack('/test/dir1');
  assert.strictEqual(state.navigationStack.length, 1, 'Should have 1 directory in stack');
  assert.strictEqual(state.currentDepth, 0, 'Current depth should be 0');
  assert.strictEqual(state.navigationStack[0], '/test/dir1', 'First directory should be /test/dir1');
  
  // Add second directory
  state.addToNavigationStack('/test/dir2');
  assert.strictEqual(state.navigationStack.length, 2, 'Should have 2 directories in stack');
  assert.strictEqual(state.currentDepth, 1, 'Current depth should be 1');
  assert.strictEqual(state.navigationStack[1], '/test/dir2', 'Second directory should be /test/dir2');
  
  // Add third directory
  state.addToNavigationStack('/test/dir3');
  assert.strictEqual(state.navigationStack.length, 3, 'Should have 3 directories in stack');
  assert.strictEqual(state.currentDepth, 2, 'Current depth should be 2');
  assert.strictEqual(state.navigationStack[2], '/test/dir3', 'Third directory should be /test/dir3');
});

test('AppState navigation stack supports going back', () => {
  const state = new AppState();
  
  // Add directories
  state.addToNavigationStack('/test/dir1');
  state.addToNavigationStack('/test/dir2');
  state.addToNavigationStack('/test/dir3');
  
  // Verify initial state
  assert.strictEqual(state.canGoBack(), true, 'Should be able to go back from dir3');
  
  // Go back once
  const backDir1 = state.goBack();
  assert.strictEqual(backDir1, '/test/dir2', 'Should go back to dir2');
  assert.strictEqual(state.currentDepth, 1, 'Current depth should be 1');
  assert.strictEqual(state.canGoBack(), true, 'Should still be able to go back from dir2');
  
  // Go back again
  const backDir2 = state.goBack();
  assert.strictEqual(backDir2, '/test/dir1', 'Should go back to dir1');
  assert.strictEqual(state.currentDepth, 0, 'Current depth should be 0');
  assert.strictEqual(state.canGoBack(), false, 'Should not be able to go back from dir1');
  
  // Try to go back when at root
  const backDir3 = state.goBack();
  assert.strictEqual(backDir3, null, 'Should return null when at root');
});

test('AppState navigation stack clears forward history', () => {
  const state = new AppState();
  
  // Navigate forward: dir1 -> dir2 -> dir3
  state.addToNavigationStack('/test/dir1');
  state.addToNavigationStack('/test/dir2');
  state.addToNavigationStack('/test/dir3');
  
  // Go back to dir2
  state.goBack();
  assert.strictEqual(state.currentDepth, 1, 'Should be at dir2');
  
  // Navigate forward from dir2 to dir4
  state.addToNavigationStack('/test/dir4');
  
  // Verify forward history is cleared
  assert.strictEqual(state.navigationStack.length, 3, 'Should still have 3 entries');
  assert.strictEqual(state.navigationStack[0], '/test/dir1', 'First entry should still be dir1');
  assert.strictEqual(state.navigationStack[1], '/test/dir2', 'Second entry should still be dir2');
  assert.strictEqual(state.navigationStack[2], '/test/dir4', 'Third entry should be dir4 (not dir3)');
  assert.strictEqual(state.currentDepth, 2, 'Current depth should be 2');
});

test('AppState getCurrentDirectoryFromStack works correctly', () => {
  const state = new AppState();
  
  // Empty stack
  assert.strictEqual(state.getCurrentDirectoryFromStack(), null, 'Should return null for empty stack');
  
  // Add directory
  state.addToNavigationStack('/test/dir1');
  assert.strictEqual(state.getCurrentDirectoryFromStack(), '/test/dir1', 'Should return dir1');
  
  // Add another directory
  state.addToNavigationStack('/test/dir2');
  assert.strictEqual(state.getCurrentDirectoryFromStack(), '/test/dir2', 'Should return dir2');
  
  // Go back
  state.goBack();
  assert.strictEqual(state.getCurrentDirectoryFromStack(), '/test/dir1', 'Should return dir1 after going back');
});

test('AppState navigation depth tracking', () => {
  const state = new AppState();
  
  assert.strictEqual(state.getNavigationDepth(), 0, 'Initial depth should be 0');
  
  state.addToNavigationStack('/test/dir1');
  assert.strictEqual(state.getNavigationDepth(), 0, 'Depth should be 0 at root');
  
  state.addToNavigationStack('/test/dir2');
  assert.strictEqual(state.getNavigationDepth(), 1, 'Depth should be 1 after one navigation');
  
  state.addToNavigationStack('/test/dir3');
  assert.strictEqual(state.getNavigationDepth(), 2, 'Depth should be 2 after two navigations');
  
  state.goBack();
  assert.strictEqual(state.getNavigationDepth(), 1, 'Depth should be 1 after going back once');
});

test('AppState navigation stack reset', () => {
  const state = new AppState();
  
  // Add some directories
  state.addToNavigationStack('/test/dir1');
  state.addToNavigationStack('/test/dir2');
  assert.strictEqual(state.navigationStack.length, 2, 'Should have 2 directories');
  
  // Reset
  state.reset();
  assert.strictEqual(state.navigationStack.length, 0, 'Navigation stack should be empty after reset');
  assert.strictEqual(state.currentDepth, 0, 'Current depth should be 0 after reset');
});

test('AppState handles special folder names', () => {
  const state = new AppState();
  
  // Test special folder names
  const specialFolders = ['extras', 'behind the scenes', 'delete', 'trailers'];
  
  specialFolders.forEach(folder => {
    state.addToNavigationStack(`/test/source/${folder}`);
    assert.strictEqual(state.getCurrentDirectoryFromStack(), `/test/source/${folder}`);
    state.goBack();
  });
});

test('AppState handles nested paths', () => {
  const state = new AppState();
  
  // Test deeply nested paths
  const nestedPath = '/Users/testuser/Movies/Show Name/Season 1/extras';
  state.addToNavigationStack(nestedPath);
  
  assert.strictEqual(state.getCurrentDirectoryFromStack(), nestedPath);
  assert.strictEqual(state.getNavigationDepth(), 0);
});

test('AppState handles same directory multiple times', () => {
  const state = new AppState();
  
  // Navigate to same directory multiple times
  state.addToNavigationStack('/test/dir1');
  state.addToNavigationStack('/test/dir2');
  state.addToNavigationStack('/test/dir1'); // Go back to dir1
  
  assert.strictEqual(state.getCurrentDirectoryFromStack(), '/test/dir1');
  assert.strictEqual(state.getNavigationDepth(), 2);
  assert.strictEqual(state.getNavigationStack().length, 3);
});

console.log('All navigation stack tests passed!');