"""
🤖 Fagun Browser Automation Testing Agent - Enhanced AI Testing Engine
====================================================================

Enhanced AI testing engine that aggressively finds errors, bugs, and issues
with comprehensive test scenarios and intelligent bug detection.

Author: Mejbaur Bahar Fagun
Role: Software Engineer in Test
LinkedIn: https://www.linkedin.com/in/mejbaur/
"""

import asyncio
import random
import string
from typing import List, Dict, Any, Optional
from playwright.async_api import Page, Locator
import logging
from dataclasses import dataclass
from enum import Enum

logger = logging.getLogger(__name__)


class BugSeverity(Enum):
    """Bug severity levels."""
    CRITICAL = "critical"
    HIGH = "high"
    MEDIUM = "medium"
    LOW = "low"
    INFO = "info"


@dataclass
class BugReport:
    """Bug report structure."""
    title: str
    severity: BugSeverity
    description: str
    steps_to_reproduce: List[str]
    expected_behavior: str
    actual_behavior: str
    url: str
    element_info: Dict[str, Any]
    recommendations: List[str]


class EnhancedAITestingEngine:
    """Enhanced AI testing engine with aggressive bug finding capabilities."""
    
    def __init__(self):
        self.bugs_found: List[BugReport] = []
        self.test_scenarios = self._load_test_scenarios()
        self.bug_patterns = self._load_bug_patterns()
        self.performance_thresholds = self._load_performance_thresholds()
    
    def _load_test_scenarios(self) -> Dict[str, List[Dict[str, Any]]]:
        """Load comprehensive test scenarios."""
        return {
            "navigation": [
                {"action": "rapid_navigation", "description": "Rapidly navigate between pages"},
                {"action": "back_forward", "description": "Test browser back/forward buttons"},
                {"action": "refresh_test", "description": "Test page refresh functionality"},
                {"action": "url_manipulation", "description": "Test URL manipulation and direct access"}
            ],
            "form_testing": [
                {"action": "empty_submission", "description": "Submit forms with empty fields"},
                {"action": "invalid_data", "description": "Submit forms with invalid data"},
                {"action": "sql_injection", "description": "Test for SQL injection vulnerabilities"},
                {"action": "xss_attempts", "description": "Test for XSS vulnerabilities"},
                {"action": "large_data", "description": "Submit forms with large amounts of data"},
                {"action": "special_characters", "description": "Test with special characters"},
                {"action": "unicode_testing", "description": "Test with Unicode characters"},
                {"action": "script_injection", "description": "Test for script injection"}
            ],
            "ui_testing": [
                {"action": "responsive_test", "description": "Test responsive design"},
                {"action": "accessibility_test", "description": "Test accessibility features"},
                {"action": "hover_effects", "description": "Test hover effects and interactions"},
                {"action": "click_areas", "description": "Test clickable areas and buttons"},
                {"action": "scroll_behavior", "description": "Test scrolling behavior"},
                {"action": "zoom_testing", "description": "Test zoom functionality"},
                {"action": "keyboard_navigation", "description": "Test keyboard navigation"}
            ],
            "performance": [
                {"action": "load_time_test", "description": "Test page load times"},
                {"action": "resource_loading", "description": "Test resource loading performance"},
                {"action": "memory_usage", "description": "Monitor memory usage"},
                {"action": "cpu_usage", "description": "Monitor CPU usage"},
                {"action": "network_latency", "description": "Test network latency"}
            ],
            "security": [
                {"action": "csrf_test", "description": "Test for CSRF vulnerabilities"},
                {"action": "clickjacking", "description": "Test for clickjacking vulnerabilities"},
                {"action": "session_management", "description": "Test session management"},
                {"action": "authentication", "description": "Test authentication mechanisms"},
                {"action": "authorization", "description": "Test authorization controls"}
            ]
        }
    
    def _load_bug_patterns(self) -> Dict[str, List[str]]:
        """Load bug detection patterns."""
        return {
            "ui_bugs": [
                "Element not visible",
                "Element not clickable",
                "Layout broken",
                "Text overflow",
                "Image not loading",
                "Button not responding",
                "Form validation missing",
                "Error message not displayed",
                "Loading state not handled",
                "Responsive design issues"
            ],
            "functional_bugs": [
                "Function not working",
                "Data not saved",
                "Validation bypassed",
                "Error not handled",
                "State not maintained",
                "Navigation broken",
                "Search not working",
                "Filter not applied",
                "Sort not working",
                "Pagination broken"
            ],
            "performance_bugs": [
                "Page load too slow",
                "Memory leak detected",
                "CPU usage high",
                "Network timeout",
                "Resource not optimized",
                "Caching issues",
                "Database slow query",
                "API response slow",
                "Image not optimized",
                "JavaScript blocking"
            ],
            "security_bugs": [
                "SQL injection possible",
                "XSS vulnerability",
                "CSRF token missing",
                "Authentication bypass",
                "Authorization issue",
                "Data exposure",
                "Session hijacking",
                "Clickjacking possible",
                "Input not sanitized",
                "Error information leaked"
            ]
        }
    
    def _load_performance_thresholds(self) -> Dict[str, float]:
        """Load performance thresholds."""
        return {
            "page_load_time": 3.0,  # seconds
            "element_interaction_time": 1.0,  # seconds
            "form_submission_time": 2.0,  # seconds
            "navigation_time": 1.5,  # seconds
            "memory_usage_mb": 100.0,  # MB
            "cpu_usage_percent": 80.0,  # percentage
        }
    
    async def run_comprehensive_testing(self, page: Page) -> List[BugReport]:
        """Run comprehensive testing with all AI agents."""
        logger.info("🤖 Starting comprehensive AI testing...")
        
        # Clear previous bugs
        self.bugs_found.clear()
        
        # Run all test scenarios
        await self._test_navigation_scenarios(page)
        await self._test_form_scenarios(page)
        await self._test_ui_scenarios(page)
        await self._test_performance_scenarios(page)
        await self._test_security_scenarios(page)
        
        logger.info(f"🔍 Found {len(self.bugs_found)} bugs/issues during testing")
        return self.bugs_found
    
    async def _test_navigation_scenarios(self, page: Page):
        """Test navigation scenarios."""
        logger.info("🧭 Testing navigation scenarios...")
        
        try:
            # Test rapid navigation
            await self._rapid_navigation_test(page)
            
            # Test back/forward
            await self._back_forward_test(page)
            
            # Test refresh
            await self._refresh_test(page)
            
            # Test URL manipulation
            await self._url_manipulation_test(page)
            
        except Exception as e:
            logger.error(f"Navigation testing error: {e}")
    
    async def _test_form_scenarios(self, page: Page):
        """Test form scenarios."""
        logger.info("📝 Testing form scenarios...")
        
        try:
            # Find all forms
            forms = await page.query_selector_all('form')
            
            for form in forms:
                # Test empty submission
                await self._test_empty_form_submission(form, page)
                
                # Test invalid data
                await self._test_invalid_form_data(form, page)
                
                # Test SQL injection
                await self._test_sql_injection_forms(form, page)
                
                # Test XSS attempts
                await self._test_xss_forms(form, page)
                
                # Test large data
                await self._test_large_form_data(form, page)
                
                # Test special characters
                await self._test_special_characters(form, page)
                
        except Exception as e:
            logger.error(f"Form testing error: {e}")
    
    async def _test_ui_scenarios(self, page: Page):
        """Test UI scenarios."""
        logger.info("🎨 Testing UI scenarios...")
        
        try:
            # Test responsive design
            await self._test_responsive_design(page)
            
            # Test accessibility
            await self._test_accessibility(page)
            
            # Test hover effects
            await self._test_hover_effects(page)
            
            # Test clickable areas
            await self._test_clickable_areas(page)
            
            # Test scrolling
            await self._test_scrolling_behavior(page)
            
        except Exception as e:
            logger.error(f"UI testing error: {e}")
    
    async def _test_performance_scenarios(self, page: Page):
        """Test performance scenarios."""
        logger.info("⚡ Testing performance scenarios...")
        
        try:
            # Test page load time
            await self._test_page_load_time(page)
            
            # Test resource loading
            await self._test_resource_loading(page)
            
            # Test memory usage
            await self._test_memory_usage(page)
            
            # Test network performance
            await self._test_network_performance(page)
            
        except Exception as e:
            logger.error(f"Performance testing error: {e}")
    
    async def _test_security_scenarios(self, page: Page):
        """Test security scenarios."""
        logger.info("🔒 Testing security scenarios...")
        
        try:
            # Test CSRF
            await self._test_csrf_vulnerabilities(page)
            
            # Test clickjacking
            await self._test_clickjacking(page)
            
            # Test session management
            await self._test_session_management(page)
            
            # Test authentication
            await self._test_authentication(page)
            
        except Exception as e:
            logger.error(f"Security testing error: {e}")
    
    async def _rapid_navigation_test(self, page: Page):
        """Test rapid navigation between pages."""
        try:
            # Get all links
            links = await page.query_selector_all('a[href]')
            
            if len(links) > 3:
                # Click first 3 links rapidly
                for i in range(min(3, len(links))):
                    try:
                        await links[i].click()
                        await page.wait_for_timeout(500)  # Short wait
                        
                        # Check for errors
                        if await self._check_for_errors(page):
                            self._add_bug_report(
                                title="Rapid Navigation Error",
                                severity=BugSeverity.MEDIUM,
                                description="Error occurred during rapid navigation",
                                steps_to_reproduce=["Navigate rapidly between pages", "Click multiple links quickly"],
                                expected_behavior="Navigation should work smoothly",
                                actual_behavior="Error occurred during navigation",
                                url=page.url,
                                element_info={"link_index": i},
                                recommendations=["Add loading states", "Implement proper error handling"]
                            )
                    except Exception as e:
                        self._add_bug_report(
                            title="Navigation Failure",
                            severity=BugSeverity.HIGH,
                            description=f"Failed to navigate: {str(e)}",
                            steps_to_reproduce=["Click on navigation link", "Observe error"],
                            expected_behavior="Navigation should work",
                            actual_behavior=f"Navigation failed: {str(e)}",
                            url=page.url,
                            element_info={"link_index": i},
                            recommendations=["Fix navigation logic", "Add error handling"]
                        )
        except Exception as e:
            logger.error(f"Rapid navigation test error: {e}")
    
    async def _test_empty_form_submission(self, form: Locator, page: Page):
        """Test form submission with empty fields."""
        try:
            # Find all input fields
            inputs = await form.query_selector_all('input, textarea, select')
            
            if inputs:
                # Try to submit empty form
                submit_button = await form.query_selector('button[type="submit"], input[type="submit"]')
                if submit_button:
                    await submit_button.click()
                    await page.wait_for_timeout(1000)
                    
                    # Check if validation is working
                    error_elements = await page.query_selector_all('.error, .invalid, [class*="error"], [class*="invalid"]')
                    
                    if not error_elements:
                        self._add_bug_report(
                            title="Missing Form Validation",
                            severity=BugSeverity.HIGH,
                            description="Form accepts empty submissions without validation",
                            steps_to_reproduce=["Leave form fields empty", "Submit form"],
                            expected_behavior="Form should show validation errors",
                            actual_behavior="Form submitted without validation",
                            url=page.url,
                            element_info={"form_action": await form.get_attribute("action")},
                            recommendations=["Add client-side validation", "Add server-side validation"]
                        )
        except Exception as e:
            logger.error(f"Empty form submission test error: {e}")
    
    async def _test_sql_injection_forms(self, form: Locator, page: Page):
        """Test forms for SQL injection vulnerabilities."""
        try:
            inputs = await form.query_selector_all('input[type="text"], input[type="email"], textarea')
            
            sql_payloads = [
                "' OR '1'='1",
                "'; DROP TABLE users; --",
                "' UNION SELECT * FROM users --",
                "admin'--",
                "' OR 1=1#"
            ]
            
            for input_field in inputs:
                for payload in sql_payloads:
                    try:
                        await input_field.fill(payload)
                        submit_button = await form.query_selector('button[type="submit"], input[type="submit"]')
                        if submit_button:
                            await submit_button.click()
                            await page.wait_for_timeout(1000)
                            
                            # Check for SQL error messages
                            content = await page.content()
                            sql_errors = [
                                "mysql_fetch_array", "ORA-01756", "Microsoft OLE DB Provider",
                                "SQLServer JDBC Driver", "PostgreSQL query failed", "Warning: mysql_",
                                "valid MySQL result", "MySqlClient.", "SQL syntax"
                            ]
                            
                            for error in sql_errors:
                                if error.lower() in content.lower():
                                    self._add_bug_report(
                                        title="SQL Injection Vulnerability",
                                        severity=BugSeverity.CRITICAL,
                                        description=f"SQL injection vulnerability detected with payload: {payload}",
                                        steps_to_reproduce=[f"Enter payload: {payload}", "Submit form"],
                                        expected_behavior="Input should be sanitized",
                                        actual_behavior="SQL injection successful",
                                        url=page.url,
                                        element_info={"payload": payload, "error": error},
                                        recommendations=["Use parameterized queries", "Sanitize input", "Implement proper validation"]
                                    )
                                    break
                        
                        # Clear input for next test
                        await input_field.fill("")
                        
                    except Exception as e:
                        logger.warning(f"SQL injection test error: {e}")
                        continue
        except Exception as e:
            logger.error(f"SQL injection form test error: {e}")
    
    async def _test_xss_forms(self, form: Locator, page: Page):
        """Test forms for XSS vulnerabilities."""
        try:
            inputs = await form.query_selector_all('input[type="text"], input[type="email"], textarea')
            
            xss_payloads = [
                "<script>alert('XSS')</script>",
                "<img src=x onerror=alert('XSS')>",
                "javascript:alert('XSS')",
                "<svg onload=alert('XSS')>",
                "<iframe src=javascript:alert('XSS')></iframe>"
            ]
            
            for input_field in inputs:
                for payload in xss_payloads:
                    try:
                        await input_field.fill(payload)
                        submit_button = await form.query_selector('button[type="submit"], input[type="submit"]')
                        if submit_button:
                            await submit_button.click()
                            await page.wait_for_timeout(1000)
                            
                            # Check if payload is reflected
                            content = await page.content()
                            if payload in content:
                                self._add_bug_report(
                                    title="XSS Vulnerability",
                                    severity=BugSeverity.CRITICAL,
                                    description=f"XSS vulnerability detected with payload: {payload}",
                                    steps_to_reproduce=[f"Enter payload: {payload}", "Submit form"],
                                    expected_behavior="Input should be sanitized",
                                    actual_behavior="XSS payload reflected",
                                    url=page.url,
                                    element_info={"payload": payload},
                                    recommendations=["Sanitize output", "Use CSP headers", "Validate input"]
                                )
                        
                        # Clear input for next test
                        await input_field.fill("")
                        
                    except Exception as e:
                        logger.warning(f"XSS test error: {e}")
                        continue
        except Exception as e:
            logger.error(f"XSS form test error: {e}")
    
    async def _test_responsive_design(self, page: Page):
        """Test responsive design."""
        try:
            viewports = [
                {"width": 320, "height": 568},   # iPhone SE
                {"width": 375, "height": 667},   # iPhone 8
                {"width": 768, "height": 1024},  # iPad
                {"width": 1024, "height": 768}, # Desktop
                {"width": 1920, "height": 1080} # Large desktop
            ]
            
            for viewport in viewports:
                await page.set_viewport_size(viewport)
                await page.wait_for_timeout(500)
                
                # Check for layout issues
                elements = await page.query_selector_all('*')
                for element in elements:
                    try:
                        box = await element.bounding_box()
                        if box and (box['width'] > viewport['width'] or box['height'] > viewport['height']):
                            self._add_bug_report(
                                title="Responsive Design Issue",
                                severity=BugSeverity.MEDIUM,
                                description=f"Element overflows viewport at {viewport['width']}x{viewport['height']}",
                                steps_to_reproduce=[f"Set viewport to {viewport['width']}x{viewport['height']}", "Check layout"],
                                expected_behavior="Elements should fit within viewport",
                                actual_behavior="Element overflows viewport",
                                url=page.url,
                                element_info={"viewport": viewport, "element_box": box},
                                recommendations=["Fix CSS media queries", "Adjust element sizing", "Test responsive design"]
                            )
                    except Exception as e:
                        continue
        except Exception as e:
            logger.error(f"Responsive design test error: {e}")
    
    async def _test_page_load_time(self, page: Page):
        """Test page load time."""
        try:
            start_time = await page.evaluate("performance.now()")
            await page.reload()
            await page.wait_for_load_state('networkidle')
            end_time = await page.evaluate("performance.now()")
            
            load_time = (end_time - start_time) / 1000  # Convert to seconds
            
            if load_time > self.performance_thresholds['page_load_time']:
                self._add_bug_report(
                    title="Slow Page Load Time",
                    severity=BugSeverity.MEDIUM,
                    description=f"Page load time is {load_time:.2f}s, exceeds threshold of {self.performance_thresholds['page_load_time']}s",
                    steps_to_reproduce=["Reload page", "Measure load time"],
                    expected_behavior="Page should load quickly",
                    actual_behavior=f"Page loads in {load_time:.2f}s",
                    url=page.url,
                    element_info={"load_time": load_time, "threshold": self.performance_thresholds['page_load_time']},
                    recommendations=["Optimize images", "Minify CSS/JS", "Use CDN", "Enable compression"]
                )
        except Exception as e:
            logger.error(f"Page load time test error: {e}")
    
    async def _check_for_errors(self, page: Page) -> bool:
        """Check for JavaScript errors on the page."""
        try:
            # Check console for errors
            errors = await page.evaluate("""
                () => {
                    if (window.fagunErrorMonitor) {
                        return window.fagunErrorMonitor.getErrors();
                    }
                    return [];
                }
            """)
            return len(errors) > 0
        except Exception:
            return False
    
    def _add_bug_report(self, title: str, severity: BugSeverity, description: str, 
                       steps_to_reproduce: List[str], expected_behavior: str, 
                       actual_behavior: str, url: str, element_info: Dict[str, Any], 
                       recommendations: List[str]):
        """Add a bug report."""
        bug = BugReport(
            title=title,
            severity=severity,
            description=description,
            steps_to_reproduce=steps_to_reproduce,
            expected_behavior=expected_behavior,
            actual_behavior=actual_behavior,
            url=url,
            element_info=element_info,
            recommendations=recommendations
        )
        self.bugs_found.append(bug)
        logger.info(f"🐛 Bug found: {title} ({severity.value})")
    
    # Placeholder methods for other tests
    async def _back_forward_test(self, page: Page):
        """Test browser back/forward functionality."""
        pass
    
    async def _refresh_test(self, page: Page):
        """Test page refresh functionality."""
        pass
    
    async def _url_manipulation_test(self, page: Page):
        """Test URL manipulation."""
        pass
    
    async def _test_invalid_form_data(self, form: Locator, page: Page):
        """Test form with invalid data."""
        pass
    
    async def _test_large_form_data(self, form: Locator, page: Page):
        """Test form with large data."""
        pass
    
    async def _test_special_characters(self, form: Locator, page: Page):
        """Test form with special characters."""
        pass
    
    async def _test_accessibility(self, page: Page):
        """Test accessibility features."""
        pass
    
    async def _test_hover_effects(self, page: Page):
        """Test hover effects."""
        pass
    
    async def _test_clickable_areas(self, page: Page):
        """Test clickable areas."""
        pass
    
    async def _test_scrolling_behavior(self, page: Page):
        """Test scrolling behavior."""
        pass
    
    async def _test_resource_loading(self, page: Page):
        """Test resource loading performance."""
        pass
    
    async def _test_memory_usage(self, page: Page):
        """Test memory usage."""
        pass
    
    async def _test_network_performance(self, page: Page):
        """Test network performance."""
        pass
    
    async def _test_csrf_vulnerabilities(self, page: Page):
        """Test CSRF vulnerabilities."""
        pass
    
    async def _test_clickjacking(self, page: Page):
        """Test clickjacking vulnerabilities."""
        pass
    
    async def _test_session_management(self, page: Page):
        """Test session management."""
        pass
    
    async def _test_authentication(self, page: Page):
        """Test authentication."""
        pass


# Global enhanced testing engine
enhanced_ai_testing_engine = EnhancedAITestingEngine()