import { test, expect } from '@playwright/test';

/**
 * LiveComponents: Target Support Tests
 *
 * Tests data-lc-target attribute for updating elements outside the component
 */
test.describe('LiveComponents Target Support', () => {
  test.beforeEach(async ({ page }) => {
    await page.goto('/');
  });

  test('should update target element within component', async ({ page }) => {
    // Find a component with a button that has data-lc-target
    const targetButton = page.locator('[data-lc-target]').first();
    const count = await targetButton.count();

    if (count === 0) {
      test.skip();
      return;
    }

    // Get target selector
    const targetSelector = await targetButton.getAttribute('data-lc-target');
    if (!targetSelector) {
      test.skip();
      return;
    }

    // Find target element
    const targetElement = page.locator(targetSelector).first();
    const targetExists = await targetElement.count() > 0;

    if (!targetExists) {
      test.skip();
      return;
    }

    // Get initial content
    const initialContent = await targetElement.textContent();

    // Click button
    await targetButton.click();

    // Wait for update
    await page.waitForTimeout(1000);

    // Target should still exist and be visible
    expect(targetElement).toBeVisible();
  });

  test('should update target element outside component', async ({ page }) => {
    // This test requires a component that updates an element outside itself
    // Look for a component with data-lc-target pointing to an element outside
    const components = page.locator('[data-live-component]');
    const componentCount = await components.count();

    if (componentCount === 0) {
      test.skip();
      return;
    }

    // Find a button with data-lc-target that points outside its component
    const buttons = page.locator('[data-live-action][data-lc-target]');
    const buttonCount = await buttons.count();

    if (buttonCount === 0) {
      test.skip();
      return;
    }

    // Test first button
    const button = buttons.first();
    const targetSelector = await button.getAttribute('data-lc-target');
    
    if (!targetSelector) {
      test.skip();
      return;
    }

    // Find target element (should exist in document)
    const targetElement = page.locator(targetSelector).first();
    const targetExists = await targetElement.count() > 0;

    if (!targetExists) {
      test.skip();
      return;
    }

    // Get component element
    const component = button.locator('xpath=ancestor::*[@data-live-component][1]').first();
    const componentExists = await component.count() > 0;

    // Check if target is outside component (if component found)
    if (componentExists) {
      const targetInComponent = await component.locator(targetSelector).count() > 0;
      
      // If target is inside component, skip this test (tested in previous test)
      if (targetInComponent) {
        test.skip();
        return;
      }
    }

    // Get initial content
    const initialContent = await targetElement.textContent();

    // Click button
    await button.click();

    // Wait for update
    await page.waitForTimeout(1000);

    // Target should still exist and be visible
    expect(targetElement).toBeVisible();
  });

  test('should fallback to component element if target not found', async ({ page }) => {
    // This test requires a component with an invalid target selector
    // Since we can't easily create invalid selectors in tests, we'll test the fallback behavior
    const components = page.locator('[data-live-component]');
    const componentCount = await components.count();

    if (componentCount === 0) {
      test.skip();
      return;
    }

    // Find any action button
    const actionButton = page.locator('[data-live-action]').first();
    const buttonCount = await actionButton.count();

    if (buttonCount === 0) {
      test.skip();
      return;
    }

    // Get component
    const component = actionButton.locator('xpath=ancestor::*[@data-live-component][1]').first();
    const componentId = await component.getAttribute('data-live-component');

    if (!componentId) {
      test.skip();
      return;
    }

    // Click button (should work even if target not found - falls back to component)
    await actionButton.click();

    // Wait for update
    await page.waitForTimeout(1000);

    // Component should still exist
    expect(component).toBeVisible();
  });

  test('should support CSS selector targets', async ({ page }) => {
    // Test ID selector
    const idTargetButton = page.locator('[data-lc-target^="#"]').first();
    const idCount = await idTargetButton.count();

    if (idCount > 0) {
      const targetId = await idTargetButton.getAttribute('data-lc-target');
      const targetElement = page.locator(targetId || '').first();
      
      if (await targetElement.count() > 0) {
        await idTargetButton.click();
        await page.waitForTimeout(1000);
        expect(targetElement).toBeVisible();
      }
    }

    // Test class selector
    const classTargetButton = page.locator('[data-lc-target^="."]').first();
    const classCount = await classTargetButton.count();

    if (classCount > 0) {
      const targetClass = await classTargetButton.getAttribute('data-lc-target');
      const targetElement = page.locator(targetClass || '').first();
      
      if (await targetElement.count() > 0) {
        await classTargetButton.click();
        await page.waitForTimeout(1000);
        expect(targetElement).toBeVisible();
      }
    }
  });

  test('should combine target with swap strategies', async ({ page }) => {
    // Find a button with both data-lc-target and data-lc-swap
    const combinedButton = page.locator('[data-lc-target][data-lc-swap]').first();
    const count = await combinedButton.count();

    if (count === 0) {
      test.skip();
      return;
    }

    const targetSelector = await combinedButton.getAttribute('data-lc-target');
    const swapStrategy = await combinedButton.getAttribute('data-lc-swap');

    if (!targetSelector || !swapStrategy) {
      test.skip();
      return;
    }

    const targetElement = page.locator(targetSelector).first();
    const targetExists = await targetElement.count() > 0;

    if (!targetExists) {
      test.skip();
      return;
    }

    // Click button
    await combinedButton.click();

    // Wait for update
    await page.waitForTimeout(1000);

    // Target should still exist (swap strategy applied)
    expect(targetElement).toBeVisible();
  });
});