import AutoStatusPlugin from '../src/main';
import { App } from 'obsidian';

// Default settings constant that matches the plugin
const DEFAULT_SETTINGS = {
  propertyName: 'Pending tasks',
  enableAutoProcessing: true,
  excludeFolders: [] as string[],
  includeFolders: [] as string[],
  debounceDelay: 500,
  enableTaskCounts: false,
  pendingTasksCountProperty: 'Pending tasks count',
  totalTasksCountProperty: 'Total tasks count',
  countRootTasksOnly: false,
};

describe('Settings Management', () => {
  let plugin: AutoStatusPlugin;
  let mockApp: App;

  beforeEach(() => {
    mockApp = new App();
    plugin = new AutoStatusPlugin(mockApp, {} as any);
    // Initialize settings to prevent undefined errors
    plugin.settings = { ...DEFAULT_SETTINGS };
  });

  describe('loadSettings', () => {
    test('should load default settings when no saved data exists', async () => {
      plugin.loadData = jest.fn().mockResolvedValue(undefined);

      await plugin.loadSettings();

      expect(plugin.settings).toEqual(DEFAULT_SETTINGS);
    });

    test('should merge saved settings with defaults', async () => {
      const savedSettings = {
        propertyName: 'Custom Tasks',
        enableAutoProcessing: false,
        excludeFolders: ['Templates'],
      };

      plugin.loadData = jest.fn().mockResolvedValue(savedSettings);

      await plugin.loadSettings();

      expect(plugin.settings).toEqual({
        ...DEFAULT_SETTINGS,
        propertyName: 'Custom Tasks',
        enableAutoProcessing: false,
        excludeFolders: ['Templates'],
      });
    });

    test('should fill in new task-count fields when loading legacy data', async () => {
      const legacySettings = {
        propertyName: 'Pending tasks',
        enableAutoProcessing: true,
        excludeFolders: [],
        includeFolders: [],
        debounceDelay: 500,
      };

      plugin.loadData = jest.fn().mockResolvedValue(legacySettings);

      await plugin.loadSettings();

      expect(plugin.settings.enableTaskCounts).toBe(false);
      expect(plugin.settings.pendingTasksCountProperty).toBe('Pending tasks count');
      expect(plugin.settings.totalTasksCountProperty).toBe('Total tasks count');
      expect(plugin.settings.countRootTasksOnly).toBe(false);
    });

    test('should handle invalid saved data gracefully', async () => {
      plugin.loadData = jest.fn().mockResolvedValue(null);

      await plugin.loadSettings();

      expect(plugin.settings).toEqual(DEFAULT_SETTINGS);
    });
  });

  describe('saveSettings', () => {
    test('should save current settings', async () => {
      plugin.saveData = jest.fn().mockResolvedValue(undefined);
      plugin.settings = {
        ...DEFAULT_SETTINGS,
        propertyName: 'My Tasks',
        enableAutoProcessing: false,
        excludeFolders: ['Archive'],
        includeFolders: ['Work'],
        debounceDelay: 1000,
      };

      await plugin.saveSettings();

      expect(plugin.saveData).toHaveBeenCalledWith(plugin.settings);
    });

    test('should recreate debounced function after saving', async () => {
      plugin.saveData = jest.fn().mockResolvedValue(undefined);
      plugin.debouncedProcessFile = jest.fn();
      // Ensure settings are properly initialized
      plugin.settings = { ...DEFAULT_SETTINGS };

      const originalDebouncedFn = plugin.debouncedProcessFile;

      await plugin.saveSettings();

      // The debounced function should be recreated
      expect(plugin.debouncedProcessFile).toBeDefined();
      expect(plugin.debouncedProcessFile).not.toBe(originalDebouncedFn);
    });
  });

  describe('default settings validation', () => {
    test('should have valid default property name', () => {
      const defaults = {
        propertyName: 'Pending tasks',
        enableAutoProcessing: true,
        excludeFolders: [] as string[],
        includeFolders: [] as string[],
        debounceDelay: 500,
      };

      expect(defaults.propertyName).toBeTruthy();
      expect(typeof defaults.propertyName).toBe('string');
    });

    test('should have valid default processing state', () => {
      const defaults = {
        propertyName: 'Pending tasks',
        enableAutoProcessing: true,
        excludeFolders: [] as string[],
        includeFolders: [] as string[],
        debounceDelay: 500,
      };

      expect(typeof defaults.enableAutoProcessing).toBe('boolean');
      expect(defaults.enableAutoProcessing).toBe(true);
    });

    test('should have valid default folder arrays', () => {
      const defaults = {
        propertyName: 'Pending tasks',
        enableAutoProcessing: true,
        excludeFolders: [] as string[],
        includeFolders: [] as string[],
        debounceDelay: 500,
      };

      expect(Array.isArray(defaults.excludeFolders)).toBe(true);
      expect(Array.isArray(defaults.includeFolders)).toBe(true);
      expect(defaults.excludeFolders.length).toBe(0);
      expect(defaults.includeFolders.length).toBe(0);
    });

    test('should have valid default debounce delay', () => {
      const defaults = {
        propertyName: 'Pending tasks',
        enableAutoProcessing: true,
        excludeFolders: [] as string[],
        includeFolders: [] as string[],
        debounceDelay: 500,
      };

      expect(typeof defaults.debounceDelay).toBe('number');
      expect(defaults.debounceDelay).toBeGreaterThan(0);
    });
  });

  describe('settings validation edge cases', () => {
    test('should handle empty string property name', async () => {
      const savedSettings = {
        propertyName: '',
        enableAutoProcessing: true,
        excludeFolders: [] as string[],
        includeFolders: [] as string[],
        debounceDelay: 500,
      };

      plugin.loadData = jest.fn().mockResolvedValue(savedSettings);
      await plugin.loadSettings();

      // Should accept empty string if provided
      expect(plugin.settings.propertyName).toBe('');
    });

    test('should handle negative debounce delay', async () => {
      const savedSettings = {
        propertyName: 'Tasks',
        enableAutoProcessing: true,
        excludeFolders: [] as string[],
        includeFolders: [] as string[],
        debounceDelay: -100,
      };

      plugin.loadData = jest.fn().mockResolvedValue(savedSettings);
      await plugin.loadSettings();

      // Should accept negative value if provided (validation happens in UI)
      expect(plugin.settings.debounceDelay).toBe(-100);
    });

    test('should handle non-array folder settings', async () => {
      const savedSettings = {
        propertyName: 'Tasks',
        enableAutoProcessing: true,
        excludeFolders: 'Templates', // Should be array
        includeFolders: null as any, // Should be array
        debounceDelay: 500,
      };

      plugin.loadData = jest.fn().mockResolvedValue(savedSettings);
      await plugin.loadSettings();

      // Object.assign will overwrite with non-array values
      expect(plugin.settings.excludeFolders).toBe('Templates');
      expect(plugin.settings.includeFolders).toBe(null);
    });
  });
});