import pytest
import textwrap
from scripts.ai_style_formatter import format_code

def test_basic_indentation() -> None:
 source = textwrap.dedent("""\
        def hello():
            print("world")
            if True:
                print("nested")
    """)
 expected = (
  "def hello():\n"
  " print(\"world\")\n"
  " if True:\n"
  "  print(\"nested\")\n"
 )
 assert format_code(source) == expected

def test_top_level_blank_lines() -> None:
 source = textwrap.dedent("""\
        def a():
            pass


        def b():
            pass
    """)
 expected = (
  "def a():\n"
  " pass\n"
  "\n"
  "def b():\n"
  " pass\n"
 )
 assert format_code(source) == expected

def test_inner_blank_lines() -> None:
 source = textwrap.dedent("""\
        def a():
            print("start")

            print("end")
    """)
 expected = (
  "def a():\n"
  " print(\"start\")\n"
  " print(\"end\")\n"
 )
 assert format_code(source) == expected

def test_multiline_string_safety() -> None:
 source = textwrap.dedent("""\
        def a():
            '''
            This is a multiline
            string that should
            not be reformatted
            inside.
            '''
            pass
    """)
 # Note: the indentation of the ''' itself becomes 1 space.
 # The content inside remains exactly as in source.
 # textwrap.dedent will remove the common leading whitespace from the source.
 # The source's ''' is at 4 spaces. Content is at 4 spaces.
 # After dedent:
 # def a():
 #     '''
 #     This is a...
 result = format_code(source)
 assert "    This is a multiline" in result
 assert result.startswith("def a():\n '''")

def test_continuation_indentation() -> None:
 source = textwrap.dedent("""\
        def long_func(
            a,
            b
        ):
            return (
                a +
                b
            )
    """)
 expected = (
  "def long_func(\n"
  " a,\n"
  " b\n"
  "):\n"
  " return (\n"
  "  a +\n"
  "  b\n"
  " )\n"
 )
 assert format_code(source) == expected

def test_multiple_top_level_definitions(vlogger) -> None:
 source = textwrap.dedent("""\
        class MyClass:
            def __init__(self):
                self.x = 1

            def method(self):
                pass


        def top_level():
            pass
    """)
 expected = (
  "class MyClass:\n"
  " def __init__(self):\n"
  "  self.x = 1\n"
  "\n"
  " def method(self):\n"
  "  pass\n"
  "\n"
  "def top_level():\n"
  " pass\n"
 )
 result = format_code(source)
 vlogger.log_state("Formatted Output", repr(source), repr(result))
 assert result == expected
 vlogger.finalize("AI Style Formatter", "PASS", "Code states correctly match the 1-space ultra-compact style expectations.")