/**
 * bashrs WASM Canary Tests
 *
 * Test Suite: B01-B40 (40 browser tests)
 * Methodology: EXTREME TDD (RED → GREEN → REFACTOR)
 * Browsers: Chromium, Firefox, WebKit
 * Goal: Validate bashrs WASM in production browsers
 *
 * Inspired by:
 * - SQLite testing (608:1 test-to-code ratio)
 * - WOS Canary Tests (60 tests, 8-second runtime)
 * - interactive.paiml.com WASM validation
 */

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

// ============================================================================
// Helper Functions
// ============================================================================

/**
 * Load bashrs WASM module and wait for initialization
 * @param page Playwright page object
 */
async function loadBashrsWasm(page: Page): Promise<void> {
  await page.goto('/');

  // Wait for WASM to load and initialize
  // Expected: Status element shows "✅ WASM module loaded successfully"
  await page.waitForSelector('#status:has-text("✅ WASM module loaded successfully")', {
    timeout: 30000
  });
}

/**
 * Analyze config file using bashrs WASM
 * @param page Playwright page object
 * @param config Config file content
 */
async function analyzeConfig(page: Page, config: string): Promise<void> {
  await page.locator('#config-input').fill(config);
  await page.locator('#analyze-btn').click();
  await page.waitForSelector('#results', { state: 'visible' });
}

// ============================================================================
// B01-B10: Config Analysis Workflows
// ============================================================================

test.describe('B01-B10: Config Analysis Workflows', () => {

  /**
   * B01: Load WASM module successfully
   *
   * EXTREME TDD RED Phase: This test should FAIL initially
   *
   * Acceptance Criteria:
   * - Page loads without errors
   * - WASM module loads in <5s
   * - Status shows success message
   * - Version number displayed
   *
   * Performance Target: <5000ms load time
   */
  test('B01: WASM module loads successfully', async ({ page }) => {
    const startTime = Date.now();

    // Navigate to WASM example page
    await page.goto('/');

    // Wait for WASM to load
    // This WILL FAIL initially because we haven't implemented the status element
    const statusElement = await page.waitForSelector(
      '#status:has-text("✅ WASM module loaded successfully")',
      { timeout: 30000 }
    );

    expect(statusElement).toBeTruthy();

    // Verify version displayed
    const versionElement = page.locator('#version');
    await expect(versionElement).toBeVisible();

    const version = await versionElement.textContent();
    expect(version).toMatch(/\d+\.\d+\.\d+/); // Semantic version format

    // Performance check: Load in <5s
    const duration = Date.now() - startTime;
    expect(duration).toBeLessThan(5000);

    console.log(`✅ B01 PASS: WASM loaded in ${duration}ms (target: <5000ms)`);
  });

  /**
   * B02: CONFIG-001 - PATH deduplication
   *
   * EXTREME TDD RED Phase: This test should FAIL initially
   *
   * Tests CONFIG-001 linter rule: Detect duplicate PATH entries
   */
  test('B02: CONFIG-001 - PATH deduplication', async ({ page }) => {
    await loadBashrsWasm(page);

    const bashrc = `
export PATH="/usr/local/bin:$PATH"
export PATH="/usr/local/bin:$PATH"  # CONFIG-001: Duplicate!
`;

    const startTime = Date.now();
    await analyzeConfig(page, bashrc);
    const duration = Date.now() - startTime;

    // Verify CONFIG-001 detected
    const issuesContainer = page.locator('#issues-container');
    const issueText = await issuesContainer.textContent();

    expect(issueText).toContain('CONFIG-001');
    expect(issueText).toContain('PATH');
    expect(issueText.toLowerCase()).toContain('duplicate');

    // Performance check: <100ms for 1KB file
    expect(duration).toBeLessThan(100);

    console.log(`✅ B02 PASS: CONFIG-001 detected in ${duration}ms (target: <100ms)`);
  });

  /**
   * B03: CONFIG-002 - Quote variable expansions
   *
   * EXTREME TDD RED Phase: This test should FAIL initially
   */
  test('B03: CONFIG-002 - Quote variable expansions', async ({ page }) => {
    await loadBashrsWasm(page);

    const bashrc = `
export PATH=$HOME/bin:$PATH  # CONFIG-002: Unquoted!
`;

    await analyzeConfig(page, bashrc);

    const issuesContainer = page.locator('#issues-container');
    const issueText = await issuesContainer.textContent();

    expect(issueText).toContain('CONFIG-002');
    expect(issueText).toContain('quote');

    console.log('✅ B03 PASS: CONFIG-002 detected');
  });

  /**
   * B04: CONFIG-003 - Consolidate duplicate aliases
   *
   * EXTREME TDD RED Phase: This test should FAIL initially
   */
  test('B04: CONFIG-003 - Duplicate aliases', async ({ page }) => {
    await loadBashrsWasm(page);

    const bashrc = `
alias ll="ls -la"
alias ll="ls -lah"  # CONFIG-003: Duplicate alias
`;

    await analyzeConfig(page, bashrc);

    const issuesContainer = page.locator('#issues-container');
    const issueText = await issuesContainer.textContent();

    expect(issueText).toContain('CONFIG-003');
    expect(issueText).toContain('alias');

    console.log('✅ B04 PASS: CONFIG-003 detected');
  });

  /**
   * B05: CONFIG-004 - Non-deterministic constructs
   *
   * EXTREME TDD RED Phase: This test should FAIL initially
   */
  test('B05: CONFIG-004 - Non-deterministic constructs', async ({ page }) => {
    await loadBashrsWasm(page);

    const bashrc = `
export SESSION_ID=$RANDOM  # CONFIG-004: Non-deterministic!
export TIMESTAMP=$(date +%s)  # CONFIG-004: Non-deterministic!
`;

    await analyzeConfig(page, bashrc);

    const issuesContainer = page.locator('#issues-container');
    const issueText = await issuesContainer.textContent();

    expect(issueText).toContain('CONFIG-004');
    expect(issueText).toContain('deterministic');

    console.log('✅ B05 PASS: CONFIG-004 detected');
  });

  /**
   * B06: Display issues with correct line numbers
   *
   * EXTREME TDD RED Phase: This test should FAIL initially
   */
  test('B06: Display issues with correct line numbers', async ({ page }) => {
    await loadBashrsWasm(page);

    // Note: Template literal without leading newline to ensure line 2 is line 2
    const bashrc = `# Line 1: comment
export PATH=$HOME/bin:$PATH  # Line 2: CONFIG-002 on this line
# Line 3: comment`;

    await analyzeConfig(page, bashrc);

    const issuesContainer = page.locator('#issues-container');
    const issueText = await issuesContainer.textContent();

    // Verify line number 2 is shown
    expect(issueText).toContain('Line 2');

    console.log('✅ B06 PASS: Line numbers correct');
  });

  /**
   * B07: Purify config and show fixed output
   *
   * SKIPPED: Requires #fixed-output UI element (not yet implemented in demo)
   * TODO: Implement purify UI feature or create full-featured demo
   */
  test.skip('B07: Purify config and show fixed output', async ({ page }) => {
    await loadBashrsWasm(page);

    const bashrc = `export PATH=$HOME/bin:$PATH`;

    await analyzeConfig(page, bashrc);

    // Click purify button
    const purifyBtn = page.locator('#purify-btn');
    await purifyBtn.click();

    // Verify fixed output shown
    const fixedOutput = page.locator('#fixed-output');
    await expect(fixedOutput).toBeVisible();

    const fixedText = await fixedOutput.textContent();
    expect(fixedText).toContain('"$HOME"'); // Quotes added

    console.log('✅ B07 PASS: Purify works');
  });

  /**
   * B08: Handle large config files (>10KB)
   *
   * EXTREME TDD RED Phase: This test should FAIL initially
   */
  test('B08: Handle large files (>10KB)', async ({ page }) => {
    await loadBashrsWasm(page);

    // Generate 10KB config
    const largeBashrc = 'export PATH=$HOME/bin:$PATH\n'.repeat(300);

    const startTime = Date.now();
    await analyzeConfig(page, largeBashrc);
    const duration = Date.now() - startTime;

    // Should complete reasonably fast
    expect(duration).toBeLessThan(1000); // <1s for 10KB

    console.log(`✅ B08 PASS: Analyzed ${largeBashrc.length} bytes in ${duration}ms`);
  });

  /**
   * B09: Handle malformed config files gracefully
   *
   * SKIPPED: Requires #error-message UI element (not yet implemented in demo)
   * TODO: Implement error display UI feature
   */
  test.skip('B09: Handle malformed config gracefully', async ({ page }) => {
    await loadBashrsWasm(page);

    const malformedBashrc = `
export PATH="unclosed string
if then fi  # Malformed syntax
`;

    // Should not crash
    await analyzeConfig(page, malformedBashrc);

    // Verify error message shown
    const errorContainer = page.locator('#error-message');
    await expect(errorContainer).toBeVisible();

    console.log('✅ B09 PASS: Malformed config handled');
  });

  /**
   * B10: Performance - Analyze 1KB config in <100ms
   *
   * EXTREME TDD RED Phase: This test should FAIL initially
   */
  test('B10: Performance <100ms for 1KB', async ({ page }) => {
    await loadBashrsWasm(page);

    const bashrc = 'export PATH=$HOME/bin:$PATH\n'.repeat(30); // ~1KB

    const startTime = Date.now();
    await analyzeConfig(page, bashrc);
    const duration = Date.now() - startTime;

    // Performance requirement: <100ms
    expect(duration).toBeLessThan(100);

    console.log(`✅ B10 PASS: Analyzed 1KB in ${duration}ms (target: <100ms)`);
  });

});

// ============================================================================
// B11-B20: Streaming I/O Performance (TODO: Next iteration)
// ============================================================================

test.describe.skip('B11-B20: Streaming I/O Performance', () => {
  test('B11: Stream 1MB via JS callbacks', async ({ page }) => {
    // TODO: Implement in next iteration
  });

  // B12-B20 TODO...
});

// ============================================================================
// B21-B30: Error Handling & Anomalies (TODO: Next iteration)
// ============================================================================

test.describe.skip('B21-B30: Error Handling', () => {
  test('B21: Handle localStorage quota exceeded', async ({ page }) => {
    // TODO: Implement in next iteration
  });

  // B22-B30 TODO...
});

// ============================================================================
// B31-B40: Cross-Browser Compatibility (TODO: Next iteration)
// ============================================================================

test.describe.skip('B31-B40: Cross-Browser', () => {
  test('B31: Chromium full functionality', async ({ page }) => {
    // TODO: Implement in next iteration
  });

  // B32-B40 TODO...
});
