""""""
from typing import NamedTuple, Optional
from .comments import parse as parse_comments
from .settings import DEFAULT_CONFIG, Config
from pathlib import Path

from isort.parse import _normalize_line, _strip_syntax, skip_line

from typing import TextIO, Iterator


def import_type(line: str, config: Config = DEFAULT_CONFIG) -> Optional[str]:
    """If the current line is an import line it will return its type (from or straight)"""
    if line.startswith(("import ", "cimport ")):
        return "straight"
    if line.startswith("from "):
        return "from"
    return None


class ImportIdentified(NamedTuple):
    line: int
    module: str
    attribute: str = None
    alias: Optional[str] = None
    src: Optional[Path] = None


def imports(input_stream: TextIO, config: Config = DEFAULT_CONFIG) -> Iterator[ImportIdentified]:
    """Parses a python file taking out and categorizing imports."""
    in_quote = ""

    indexed_input = enumerate(input_stream)
    for index, line in indexed_input:
        (skipping_line, in_quote) = skip_line(
            line, in_quote=in_quote, index=index, section_comments=config.section_comments
        )

        if skipping_line:
            continue

        line, *end_of_line_comment = line.split("#", 1)
        if ";" in line:
            statements = [line.strip() for line in line.split(";")]
        else:
            statements = [line]
        if end_of_line_comment:
            statements[-1] = f"{statements[-1]}#{end_of_line_comment[0]}"

        for statement in statements:
            line, raw_line = _normalize_line(statement)
            type_of_import = import_type(line, config) or ""
            if not type_of_import:
                continue

            import_string, _ = parse_comments(line)

            if "(" in line.split("#", 1)[0]:
                while not line.split("#")[0].strip().endswith(")"):
                    try:
                        index, next_line = next(indexed_input)
                    except StopIteration:
                        break

                    line, _ = parse_comments(next_line)
                    import_string += "\n" + line
            else:
                while line.strip().endswith("\\"):
                    index, next_line = next(indexed_input)
                    line, _ = parse_comments(next_line)

                    # Still need to check for parentheses after an escaped line
                    if (
                        "(" in line.split("#")[0]
                        and ")" not in line.split("#")[0]
                    ):
                        import_string += "\n" + line

                        while not line.split("#")[0].strip().endswith(")"):
                            try:
                                index, next_line = next(indexed_input)
                            except StopIteration:
                                break
                            line, _ = parse_comments(next_line)
                            import_string += "\n" + line

                    if import_string.strip().endswith(
                        (" import", " cimport")
                    ) or line.strip().startswith(("import ", "cimport ")):
                        import_string += "\n" + line
                    else:
                        import_string = import_string.rstrip().rstrip("\\") + " " + line.lstrip()

            if type_of_import == "from":
                cimports: bool
                import_string = (
                    import_string.replace("import(", "import (")
                    .replace("\\", " ")
                    .replace("\n", " ")
                )
                if " cimport " in import_string:
                    parts = import_string.split(" cimport ")
                    cimports = True

                else:
                    parts = import_string.split(" import ")
                    cimports = False

                from_import = parts[0].split(" ")
                import_string = (" cimport " if cimports else " import ").join(
                    [from_import[0] + " " + "".join(from_import[1:])] + parts[1:]
                )

            just_imports = [
                item.replace("{|", "{ ").replace("|}", " }")
                for item in _strip_syntax(import_string).split()
            ]

            direct_imports = just_imports[1:]
            top_level_module = ""
            if "as" in just_imports and (just_imports.index("as") + 1) < len(just_imports):
                while "as" in just_imports:
                    nested_module = None
                    as_index = just_imports.index("as")
                    if type_of_import == "from":
                        nested_module = just_imports[as_index - 1]
                        top_level_module = just_imports[0]
                        module = top_level_module + "." + nested_module
                        as_name = just_imports[as_index + 1]
                        direct_imports.remove(nested_module)
                        direct_imports.remove(as_name)
                        direct_imports.remove("as")
                        if nested_module == as_name and config.remove_redundant_aliases:
                            pass
                        elif as_name not in as_map["from"][module]:
                            as_map["from"][module].append(as_name)

                    else:
                        module = just_imports[as_index - 1]
                        as_name = just_imports[as_index + 1]
                        if module == as_name and config.remove_redundant_aliases:
                            pass
                        elif as_name not in as_map["straight"][module]:
                            as_map["straight"][module].append(as_name)

                    del just_imports[as_index : as_index + 2]

            if type_of_import == "from":
                module = just_imports.pop(0)
                for attribute in just_imports:
                    yield ImportIdentified(index, module, attribute)
            else:
                for module in just_imports:
                    yield ImportIdentified(index, module)

@@ -734,16 +734,42 @@
  = None%0A
+    cimport: bool = False%0A
 %0A%0Adef im
@@ -4564,36 +4564,32 @@
             
-nested_modul
+attribut
 e = None%0A   
@@ -4714,28 +4714,24 @@
         
-nested_modul
+attribut
 e = just
@@ -4870,28 +4870,24 @@
 + %22.%22 + 
-nested_modul
+attribut
 e%0A      
@@ -4897,38 +4897,36 @@
                a
-s_name
+lias
  = just_imports%5B
@@ -4985,28 +4985,24 @@
 .remove(
-nested_modul
+attribut
 e)%0A     
@@ -5043,22 +5043,20 @@
 remove(a
-s_name
+lias
 )%0A      
@@ -5132,32 +5132,26 @@
  if 
-nested_module == as_name
+attribute == alias
  and
@@ -5247,50 +5247,154 @@
   el
-if as_name not in as_map%5B%22from%22%5D%5B
+se:%0A                            yield ImportIdentified(%0A                                index,%0A                                top_level_
 module
-%5D:%0A
+,%0A 
     
@@ -5421,45 +5421,94 @@
     
-as_map%5B%22from%22%5D%5Bmodule%5D.append(as_name
+   attribute,%0A                                alias=alias%0A                            
 )%0A%0A 

Return aliases