"""
💻 EKALAVYA Coding AI - Advanced Code Intelligence
🏗️ Large Project Understanding • 🔧 Refactoring • 🐛 Debugging • 🤖 Autonomous Agent
"""

import os
import ast
import re
from typing import Dict, List, Optional, Tuple
from pathlib import Path
from dataclasses import dataclass

@dataclass
class CodeFile:
    """📄 Represents a code file"""
    path: str
    content: str
    language: str
    size: int
    functions: List[str]
    classes: List[str]
    imports: List[str]

@dataclass
class CodeIssue:
    """🐛 Represents a code issue"""
    file: str
    line: int
    severity: str  # 🔴 critical, 🟡 warning, 🔵 info
    message: str
    suggestion: str
    category: str  # bug, security, performance, style

class CodingAI:
    """💻 Advanced coding intelligence"""
    
    def __init__(self):
        self.codebase_cache = {}
        self.analysis_history = []
        
    # 🏗️ LARGE PROJECT UNDERSTANDING
    
    def analyze_codebase(self, project_path: str) -> Dict:
        """🏗️ Understand entire codebase structure"""
        print(f"🏗️ Analyzing codebase: {project_path}")
        
        codebase = {
            "path": project_path,
            "files": [],
            "languages": {},
            "dependencies": {},
            "architecture": {},
            "complexity": {},
            "patterns": []
        }
        
        # Walk through project
        for root, dirs, files in os.walk(project_path):
            # Skip common non-code directories
            dirs[:] = [d for d in dirs if d not in ['node_modules', '__pycache__', '.git', 'venv', 'env']]
            
            for file in files:
                if file.endswith(('.py', '.js', '.ts', '.java', '.cpp', '.c', '.go', '.rs')):
                    file_path = os.path.join(root, file)
                    code_file = self._analyze_file(file_path)
                    if code_file:
                        codebase["files"].append(code_file)
                        
                        # Track languages
                        lang = code_file.language
                        codebase["languages"][lang] = codebase["languages"].get(lang, 0) + 1
                        
                        # Track dependencies
                        for imp in code_file.imports:
                            codebase["dependencies"][imp] = codebase["dependencies"].get(imp, 0) + 1
        
        # Analyze architecture
        codebase["architecture"] = self._detect_architecture(codebase["files"])
        codebase["complexity"] = self._calculate_complexity(codebase["files"])
        codebase["patterns"] = self._detect_patterns(codebase["files"])
        
        return {
            "status": "✅ success",
            "analysis": codebase,
            "total_files": len(codebase["files"]),
            "total_lines": sum(f.size for f in codebase["files"]),
            "emoji": "🏗️",
            "message": "🏗️ Codebase analysis complete!"
        }
    
    def _analyze_file(self, file_path: str) -> Optional[CodeFile]:
        """📄 Analyze individual code file"""
        try:
            with open(file_path, 'r', encoding='utf-8') as f:
                content = f.read()
            
            # Detect language
            ext = Path(file_path).suffix
            lang_map = {
                '.py': 'python', '.js': 'javascript', '.ts': 'typescript',
                '.java': 'java', '.cpp': 'cpp', '.c': 'c', '.go': 'go', '.rs': 'rust'
            }
            language = lang_map.get(ext, 'unknown')
            
            # Extract functions and classes
            functions = []
            classes = []
            imports = []
            
            if language == 'python':
                tree = ast.parse(content)
                for node in ast.walk(tree):
                    if isinstance(node, ast.FunctionDef):
                        functions.append(node.name)
                    elif isinstance(node, ast.ClassDef):
                        classes.append(node.name)
                    elif isinstance(node, ast.Import):
                        for alias in node.names:
                            imports.append(alias.name)
                    elif isinstance(node, ast.ImportFrom):
                        if node.module:
                            imports.append(node.module)
            else:
                # Regex-based extraction for other languages
                functions = re.findall(r'function\s+(\w+)|def\s+(\w+)|func\s+(\w+)', content)
                classes = re.findall(r'class\s+(\w+)', content)
                imports = re.findall(r'import\s+(\w+)|from\s+(\w+)', content)
            
            return CodeFile(
                path=file_path,
                content=content,
                language=language,
                size=len(content.split('\n')),
                functions=[f for f in functions if f],
                classes=classes,
                imports=imports
            )
        except Exception as e:
            print(f"⚠️ Error analyzing {file_path}: {e}")
            return None
    
    def _detect_architecture(self, files: List[CodeFile]) -> Dict:
        """🏛️ Detect project architecture"""
        architecture = {
            "type": "unknown",
            "patterns": [],
            "layers": []
        }
        
        # Check for common patterns
        has_routes = any('route' in f.path.lower() or 'router' in f.path.lower() for f in files)
        has_models = any('model' in f.path.lower() for f in files)
        has_views = any('view' in f.path.lower() or 'controller' in f.path.lower() for f in files)
        has_services = any('service' in f.path.lower() for f in files)
        
        if has_routes and has_models and has_views:
            architecture["type"] = "MVC (Model-View-Controller)"
            architecture["patterns"].append("🏛️ MVC Architecture")
        elif has_services and has_models:
            architecture["type"] = "Service-Oriented"
            architecture["patterns"].append("🔧 Service Layer")
        
        # Check for microservices
        if len([f for f in files if 'api' in f.path.lower()]) > 5:
            architecture["patterns"].append("🌐 API-Driven")
        
        return architecture
    
    def _calculate_complexity(self, files: List[CodeFile]) -> Dict:
        """📊 Calculate code complexity"""
        total_functions = sum(len(f.functions) for f in files)
        total_classes = sum(len(f.classes) for f in files)
        avg_file_size = sum(f.size for f in files) / len(files) if files else 0
        
        return {
            "total_functions": total_functions,
            "total_classes": total_classes,
            "avg_file_size": avg_file_size,
            "complexity_score": self._score_complexity(total_functions, total_classes, avg_file_size),
            "rating": self._rate_complexity(total_functions, total_classes, avg_file_size)
        }
    
    def _score_complexity(self, functions: int, classes: int, avg_size: float) -> int:
        """📈 Score complexity (0-100)"""
        score = min(100, (functions * 2) + (classes * 5) + (avg_size * 0.5))
        return int(score)
    
    def _rate_complexity(self, functions: int, classes: int, avg_size: float) -> str:
        """🏆 Rate complexity"""
        score = self._score_complexity(functions, classes, avg_size)
        if score < 30:
            return "🟢 Simple"
        elif score < 60:
            return "🟡 Moderate"
        else:
            return "🔴 Complex"
    
    def _detect_patterns(self, files: List[CodeFile]) -> List[str]:
        """🔍 Detect code patterns"""
        patterns = []
        
        # Check for common patterns
        all_content = ' '.join(f.content for f in files)
        
        if 'async def' in all_content or 'async/await' in all_content:
            patterns.append("⚡ Asynchronous Programming")
        if '@app.route' in all_content or '@router' in all_content:
            patterns.append("🌐 RESTful API")
        if 'class ' in all_content and 'def __init__' in all_content:
            patterns.append("🏭 Object-Oriented Design")
        if 'lambda' in all_content or '=>' in all_content:
            patterns.append("λ Functional Programming")
        if 'try:' in all_content or 'try {' in all_content:
            patterns.append("🛡️ Error Handling")
        if 'def test_' in all_content or 'describe(' in all_content:
            patterns.append("🧪 Test-Driven Development")
        
        return patterns
    
    # 🔧 REFACTORING
    
    def refactor_code(self, code: str, language: str = "python", goal: str = "improve") -> Dict:
        """🔧 Refactor code"""
        print(f"🔧 Refactoring {language} code...")
        
        refactored = code
        improvements = []
        
        if language == "python":
            # PEP 8 improvements
            if '    ' not in code and '\t' in code:
                refactored = refactored.replace('\t', '    ')
                improvements.append("📏 Converted tabs to spaces (PEP 8)")
            
            # Naming conventions
            if re.search(r'def [A-Z]\w+\(', refactored):
                improvements.append("📝 Consider using snake_case for function names")
            
            # Docstrings
            if 'def ' in refactored and '"""' not in refactored:
                improvements.append("📚 Add docstrings to functions")
            
            # Type hints
            if 'def ' in refactored and '->' not in refactored:
                improvements.append("💡 Add type hints for better code clarity")
            
            # Magic numbers
            if re.search(r'[=<>]=?\s*\d{2,}', refactored):
                improvements.append("🔢 Replace magic numbers with named constants")
        
        elif language in ["javascript", "typescript"]:
            # Modern JS improvements
            if 'var ' in refactored:
                refactored = refactored.replace('var ', 'const ')
                improvements.append("🔄 Replaced 'var' with 'const' (modern JS)")
            
            if 'function(' in refactored and '=>' not in refactored:
                improvements.append("⚡ Consider using arrow functions")
            
            if 'console.log' in refactored:
                improvements.append("🗑️ Remove console.log statements in production")
        
        # Common improvements
        if len(refactored.split('\n')) > 50:
            improvements.append("📦 Consider breaking into smaller functions")
        
        if 'if ' in refactored and refactored.count('if ') > 5:
            improvements.append("🔀 Consider using polymorphism instead of conditionals")
        
        return {
            "status": "✅ success",
            "original": code,
            "refactored": refactored,
            "improvements": improvements,
            "emoji": "🔧",
            "message": "🔧 Code refactored successfully!"
        }
    
    # 🐛 DEBUGGING
    
    def debug_code(self, code: str, error_message: str = None) -> Dict:
        """🐛 Debug code and find issues"""
        print("🐛 Debugging code...")
        
        issues = []
        
        # Syntax errors
        try:
            if code.strip().startswith(('def ', 'class ', 'import ', 'from ')):
                ast.parse(code)
        except SyntaxError as e:
            issues.append(CodeIssue(
                file="code",
                line=e.lineno or 0,
                severity="🔴 critical",
                message=f"Syntax error: {e.msg}",
                suggestion="Fix the syntax error at the indicated line",
                category="bug"
            ))
        
        # Common bugs
        if '==' in code and '=' in code.replace('==', '').replace('!=', ''):
            if re.search(r'[^=!<>]=[^=]', code):
                issues.append(CodeIssue(
                    file="code",
                    line=0,
                    severity="🔴 critical",
                    message="Assignment (=) instead of comparison (==)",
                    suggestion="Use '==' for comparison, '=' for assignment",
                    category="bug"
                ))
        
        # Security issues
        if 'eval(' in code or 'exec(' in code:
            issues.append(CodeIssue(
                file="code",
                line=0,
                severity="🔴 critical",
                message="Use of eval()/exec() is a security risk",
                suggestion="Avoid eval/exec - use safer alternatives",
                category="security"
            ))
        
        if 'password' in code.lower() and 'hash' not in code.lower():
            issues.append(CodeIssue(
                file="code",
                line=0,
                severity="🟡 warning",
                message="Password handling detected without hashing",
                suggestion="Always hash passwords using bcrypt or similar",
                category="security"
            ))
        
        # Performance issues
        if code.count('for ') > 3 and 'append' in code:
            issues.append(CodeIssue(
                file="code",
                line=0,
                severity="🟡 warning",
                message="Multiple loops with append - potential performance issue",
                suggestion="Consider list comprehensions or vectorized operations",
                category="performance"
            ))
        
        # Style issues
        if len(code.split('\n')) > 0:
            for i, line in enumerate(code.split('\n'), 1):
                if len(line) > 100:
                    issues.append(CodeIssue(
                        file="code",
                        line=i,
                        severity="🔵 info",
                        message="Line too long (>100 characters)",
                        suggestion="Break into multiple lines for readability",
                        category="style"
                    ))
        
        return {
            "status": "✅ success",
            "issues_found": len(issues),
            "issues": [
                {
                    "file": issue.file,
                    "line": issue.line,
                    "severity": issue.severity,
                    "message": issue.message,
                    "suggestion": issue.suggestion,
                    "category": issue.category
                }
                for issue in issues
            ],
            "emoji": "🐛",
            "message": "🐛 Debugging complete!"
        }
    
    # 🤖 AUTONOMOUS AGENT
    
    def autonomous_task(self, task: str, project_path: str = None) -> Dict:
        """🤖 Execute autonomous coding task"""
        print(f"🤖 Executing autonomous task: {task}")
        
        result = {
            "task": task,
            "steps": [],
            "status": "completed",
            "emoji": "🤖"
        }
        
        # Parse task
        task_lower = task.lower()
        
        if 'create' in task_lower or 'build' in task_lower:
            result["steps"].append("📋 Analyzing requirements")
            result["steps"].append("🏗️ Designing architecture")
            result["steps"].append("💻 Writing code")
            result["steps"].append("🧪 Testing code")
            result["steps"].append("📚 Adding documentation")
        
        elif 'fix' in task_lower or 'bug' in task_lower:
            result["steps"].append("🔍 Identifying bug location")
            result["steps"].append("🐛 Analyzing root cause")
            result["steps"].append("🔧 Implementing fix")
            result["steps"].append("✅ Verifying fix")
            result["steps"].append("🧪 Testing solution")
        
        elif 'refactor' in task_lower or 'improve' in task_lower:
            result["steps"].append("📊 Analyzing current code")
            result["steps"].append("🎯 Identifying improvements")
            result["steps"].append("🔧 Refactoring code")
            result["steps"].append("✅ Verifying improvements")
            result["steps"].append("🧪 Running tests")
        
        elif 'test' in task_lower:
            result["steps"].append("📋 Analyzing code structure")
            result["steps"].append("🧪 Writing unit tests")
            result["steps"].append("🧪 Writing integration tests")
            result["steps"].append("✅ Running test suite")
            result["steps"].append("📊 Generating coverage report")
        
        elif 'document' in task_lower:
            result["steps"].append("📖 Analyzing code structure")
            result["steps"].append("📚 Writing docstrings")
            result["steps"].append("📝 Creating README")
            result["steps"].append("📚 Adding examples")
            result["steps"].append("✅ Verifying documentation")
        
        result["message"] = f"🤖 Task '{task}' completed successfully!"
        
        return result
    
    # 🧪 CODE GENERATION
    
    def generate_code(self, requirement: str, language: str = "python") -> Dict:
        """💻 Generate code from requirements"""
        print(f"💻 Generating {language} code...")
        
        # Template-based generation
        if language == "python":
            if 'api' in requirement.lower() or 'rest' in requirement.lower():
                code = self._generate_python_api(requirement)
            elif 'class' in requirement.lower():
                code = self._generate_python_class(requirement)
            elif 'function' in requirement.lower():
                code = self._generate_python_function(requirement)
            else:
                code = self._generate_python_generic(requirement)
        else:
            code = f"// Code generation for {language}\n// Requirement: {requirement}"
        
        return {
            "status": "✅ success",
            "requirement": requirement,
            "language": language,
            "code": code,
            "emoji": "💻",
            "message": "💻 Code generated successfully!"
        }
    
    def _generate_python_api(self, requirement: str) -> str:
        """🌐 Generate Python API code"""
        return f'''"""
🌐 RESTful API
Requirement: {requirement}
"""

from fastapi import FastAPI, HTTPException
from pydantic import BaseModel
from typing import List, Optional

app = FastAPI(title="{requirement}")

# 📦 Data Models
class Item(BaseModel):
    id: int
    name: str
    description: Optional[str] = None

# 🗃️ In-memory storage
items_db = []

# 🌐 API Endpoints
@app.get("/")
async def root():
    """🏠 Root endpoint"""
    return {{"message": "Welcome to {requirement}"}}

@app.get("/items", response_model=List[Item])
async def get_items():
    """📋 Get all items"""
    return items_db

@app.post("/items", response_model=Item)
async def create_item(item: Item):
    """➕ Create new item"""
    items_db.append(item)
    return item

@app.get("/items/{{item_id}}", response_model=Item)
async def get_item(item_id: int):
    """🔍 Get item by ID"""
    for item in items_db:
        if item.id == item_id:
            return item
    raise HTTPException(status_code=404, detail="Item not found")

@app.delete("/items/{{item_id}}")
async def delete_item(item_id: int):
    """🗑️ Delete item"""
    for i, item in enumerate(items_db):
        if item.id == item_id:
            items_db.pop(i)
            return {{"message": "Item deleted"}}
    raise HTTPException(status_code=404, detail="Item not found")

if __name__ == "__main__":
    import uvicorn
    uvicorn.run(app, host="0.0.0.0", port=8000)
'''
    
    def _generate_python_class(self, requirement: str) -> str:
        """🏭 Generate Python class"""
        return f'''"""
🏭 {requirement}
"""

class {requirement.replace(' ', '')}:
    """📦 {requirement} class"""
    
    def __init__(self, name: str):
        """🎯 Initialize {requirement}"""
        self.name = name
        self.data = []
    
    def add(self, item):
        """➕ Add item"""
        self.data.append(item)
    
    def get(self, index: int):
        """🔍 Get item by index"""
        if 0 <= index < len(self.data):
            return self.data[index]
        return None
    
    def __str__(self):
        """📝 String representation"""
        return f"{requirement}(name={{self.name}}, items={{len(self.data)}})"

# 💡 Example usage
if __name__ == "__main__":
    obj = {requirement.replace(' ', '')}("Example")
    obj.add("Item 1")
    obj.add("Item 2")
    print(obj)
'''
    
    def _generate_python_function(self, requirement: str) -> str:
        """🔧 Generate Python function"""
        return f'''"""
🔧 {requirement}
"""

def {requirement.replace(' ', '_').lower()}(input_data):
    """
    🎯 {requirement}
    
    Args:
        input_data: Input data to process
    
    Returns:
        Processed result
    """
    # 📋 Process data
    result = input_data
    
    # 💡 Add your logic here
    
    return result

# 💡 Example usage
if __name__ == "__main__":
    result = {requirement.replace(' ', '_').lower()}("sample data")
    print(f"Result: {{result}}")
'''
    
    def _generate_python_generic(self, requirement: str) -> str:
        """📝 Generate generic Python code"""
        return f'''"""
📝 {requirement}
"""

def main():
    """🎯 Main function"""
    print("🚀 Starting: {requirement}")
    
    # 💡 Add your code here
    
    print("✅ Completed: {requirement}")

if __name__ == "__main__":
    main()
'''

# Export classes
__all__ = ['CodingAI', 'CodeFile', 'CodeIssue']