import ast, re

def detect_language(filename):
    if not filename or "." not in filename:
        return "text"
    ext = filename.split(".")[-1].lower()
    mapping = {"py":"python","js":"javascript","ts":"typescript","java":"java","cs":"csharp","html":"html","css":"css","json":"json","md":"markdown"}
    return mapping.get(ext, ext)

def analyze_python(code: str):
    try:
        tree = ast.parse(code)
    except Exception as e:
        return {"ok": False, "error": f"Syntax Error: {e}", "suggestion": "Check indentation or syntax near the reported location."}
    issues = []
    class FuncVisitor(ast.NodeVisitor):
        def visit_FunctionDef(self, node):
            start = node.lineno
            end = node.lineno
            for n in ast.walk(node):
                if hasattr(n, "lineno"):
                    end = max(end, n.lineno)
            length = end - start + 1
            if length > 200:
                issues.append({"type":"large_function","message":f"Function '{node.name}' is {length} lines; consider refactoring."})
            self.generic_visit(node)
    FuncVisitor().visit(tree)
    return {"ok": True, "issues": issues, "summary": "Parsed AST successfully."}

def analyze_javascript(code: str):
    if "console.log" in code and "debugger" in code:
        return {"ok": True, "notes":"Found console.log and debugger. Remove before prod."}
    if "function(" not in code and "=>" not in code:
        return {"ok": True, "notes":"No obvious function constructs found."}
    return {"ok": True, "notes":"Basic JS analysis complete."}

def analyze_code(filename, code):
    lang = detect_language(filename)
    if lang == "python":
        return analyze_python(code)
    if lang in ("javascript","typescript"):
        return analyze_javascript(code)
    return {"ok": True, "notes": f"Language {lang} not deeply analyzed. Size {len(code)} bytes.", "head": code[:800]}