# vim: fileencoding=utf-8
#
from .base_format import Format
from calculate.utils.package import (
    PackageAtomParser,
    PackageNotFound,
    PackageAtomError
    )

from collections import OrderedDict
from typing import List
import os


class WorldFormat(Format):
    FORMAT = 'world'
    EXECUTABLE = False

    _initialized = False

    comment_symbol = '#'

    def __init__(self, document_text: str,
                 template_path: str,
                 ignore_comments: bool = False,
                 add_header: bool = False,
                 already_changed: bool = False,
                 chroot_path="/",
                 **kwargs):
        processing_methods = []
        self._atom_parser = PackageAtomParser(chroot_path=chroot_path)

        super().__init__(processing_methods)
        self._template_name = os.path.basename(template_path)
        self._action_symbols = ["!!", "!"]
        self.warnings = []

        if add_header and not ignore_comments:
            self.header, document_text = self._get_header_and_document_text(
                                               document_text,
                                               template_path,
                                               already_changed=already_changed)
        else:
            self.header = ''

        document_text = document_text.strip()
        if document_text == '':
            self._document_dictionary = OrderedDict()
        else:
            document_lines = self._get_list_of_logic_lines(document_text)
            self._document_dictionary = self._lines_to_dictionary(
                                                                document_lines)

    def _lines_to_dictionary(self, document_lines: List[str]) -> OrderedDict:
        output = OrderedDict()
        for line in document_lines:
            action = None
            for action_symbol in self._action_symbols:
                if line.startswith(action_symbol):
                    action = action_symbol
                    line = line[len(action_symbol):]
                    break

            name_only = line.split(':')[0]
            if "/" not in name_only:
                line = f"{self._template_name}/{line}"

            atom_dict = self._atom_parser.parse_atom_name(line)
            atom_dict['package_atom'] = (
                                f'{atom_dict["category"]}/{atom_dict["name"]}')
            if action == "!!":
                action = "!"
                print("WITH EXISTANCE CHECK")
                try:
                    self._atom_parser._check_package_existance(atom_dict)
                    print("PACKAGE WAS FOUND")
                except (PackageNotFound, PackageAtomError):
                    print("PACKAGE WAS NOT FOUND")
                    self.warnings.append(f"package '{line}' not found")

            levels = [atom_dict["category"], atom_dict["name"]]
            level = output
            for next_level in levels:
                if next_level not in level:
                    level[next_level] = OrderedDict()
                level = level[next_level]
            level[atom_dict["slot"]] = action
        return output

    def join_template(self, template):
        self._document_dictionary = self._change_categories(
                                                 template._document_dictionary,
                                                 self._document_dictionary)

    def _change_categories(self, template: OrderedDict,
                           original: OrderedDict) -> OrderedDict:
        for category, names in template.items():
            if category in original:
                original_names = original[category]
            else:
                original_names = OrderedDict()
            changed_names = self._change_names(names, original_names)

            if not changed_names:
                original.pop(category)
            else:
                original[category] = changed_names

        return original

    def _change_names(self, template_names: OrderedDict,
                      original_names: OrderedDict) -> OrderedDict:
        for name, slots in template_names.items():
            if name in original_names:
                original_slots = original_names[name]
            else:
                original_slots = OrderedDict()
            changed_slots = self._change_slots(slots, original_slots)

            if not changed_slots:
                original_names.pop(name)
            else:
                original_names[name] = changed_slots

        return original_names

    def _change_slots(self, template_slots: OrderedDict,
                      original_slots: OrderedDict) -> OrderedDict:
        for slot, action in template_slots.items():
            if slot == "*":
                if action == "!":
                    original_slots.clear()
                continue
            else:
                if action == "!" and slot in original_slots:
                    original_slots.pop(slot)
                    continue
                if action is None and slot not in original_slots:
                    original_slots[slot] = None
                    continue

        return original_slots

    def _get_document_text(self) -> str:
        lines = []
        categories = sorted(self._document_dictionary.keys())
        for category in categories:
            names_dict = self._document_dictionary[category]
            names = sorted(names_dict.keys())
            for name in names:
                slots = sorted(names_dict[name].keys())
                for slot in slots:
                    slot = '' if slot is None else f":{slot}"
                    lines.append(f"{category}/{name}{slot}")

        lines.append('')
        return "\n".join(lines)

    @property
    def document_text(self) -> str:
        return "{}{}".format(self.header, self._get_document_text())