import tree_sitter
import tree_sitter_python
from pathlib import Path

class CodeOutliner:
    def __init__(self):
        self.language = tree_sitter.Language(tree_sitter_python.language())
        self.parser = tree_sitter.Parser(self.language)

    def outline(self, code: str) -> str:
        tree = self.parser.parse(bytes(code, "utf8"))
        lines = code.splitlines()
        
        output = []

        def get_docstring(node):
            # In Python, docstring is usually the first expression statement in a block
            body = node.child_by_field_name("body")
            if body and body.type == "block":
                for child in body.children:
                    if child.type == "comment":
                        continue
                    if child.type == "expression_statement":
                        expr = child.children[0]
                        if expr.type == "string":
                            doc = code[expr.start_byte:expr.end_byte].strip()
                            # Strip quotes
                            if doc.startswith(('"""', "'''")):
                                doc = doc[3:-3]
                            elif doc.startswith(('"', "'")):
                                doc = doc[1:-1]
                            return doc.splitlines()[0] if doc else ""
                    break
            return None

        def walk(node, indent=0):
            node_type = node.type
            name = None
            
            if node_type == "class_definition":
                name_node = node.child_by_field_name("name")
                if name_node:
                    name = code[name_node.start_byte:name_node.end_byte]
                    start_line = node.start_point.row + 1
                    end_line = node.end_point.row + 1
                    output.append(f"{'  ' * indent}[Class] {name} (Lines {start_line}-{end_line})")
                    doc = get_docstring(node)
                    if doc:
                        output.append(f"{'  ' * (indent + 1)}\"\"\"{doc}\"\"\"")
            
            elif node_type in ("function_definition", "async_function_definition"):
                name_node = node.child_by_field_name("name")
                if name_node:
                    name = code[name_node.start_byte:name_node.end_byte]
                    start_line = node.start_point.row + 1
                    end_line = node.end_point.row + 1
                    prefix = "[Async Func]" if node_type == "async_function_definition" else "[Func]"
                    
                    # Check if it's a method (parent is a class body)
                    parent = node.parent
                    while parent and parent.type != "class_definition":
                        if parent.type == "module":
                            break
                        parent = parent.parent
                    
                    if parent and parent.type == "class_definition":
                        prefix = "[Method]"
                    
                    output.append(f"{'  ' * indent}{prefix} {name} (Lines {start_line}-{end_line})")
                    doc = get_docstring(node)
                    if doc:
                        output.append(f"{'  ' * (indent + 1)}\"\"\"{doc}\"\"\"")

            for child in node.children:
                # Don't recurse into function bodies for outlining functions, 
                # but we DO want to recurse into classes to find methods.
                if node_type == "class_definition":
                    if child.type == "block":
                        walk(child, indent + 1)
                elif node_type == "module":
                    walk(child, indent)
                elif node_type == "block":
                    walk(child, indent)

        walk(tree.root_node)
        return "\n".join(output)

def get_outline(path: Path, code: str) -> str:
    suffix = path.suffix.lower()
    if suffix == ".py":
        outliner = CodeOutliner()
        return outliner.outline(code)
    else:
        return f"Outlining not supported for {suffix} files yet."