import os
from typing import Mapping

from PyQt6.QtWidgets import *
from PyQt6.QtCore import *
from PyQt6.QtGui import *

from bigtext import BigText
from logFileModel import LogFileModel
from settings import Settings

class Tabs(QWidget):

    tabs_by_index = {}
    tabs_by_filename = {}

    def __init__(self, settings: Settings):
        super(Tabs, self).__init__()

        self.settings = settings

        self.tabs = QTabWidget()
        self.tabs.setTabsClosable(True)
        self.tabs.setMovable(True)
        self.tabs.tabCloseRequested.connect(self._close_tab)

        self.layout = QVBoxLayout(self)
        self.layout.setContentsMargins(0, 0, 0, 0)

        self.layout.addWidget(self.tabs)

    def create_tab(self, file: str):
        if not os.path.isfile(file):
            message = QMessageBox(QMessageBox.Icon.Warning, "File not found",
                                  "'%s' is not a file or cannot be opened" % (file))
            message.exec()
            return

        model = LogFileModel(file)
        big_text = BigText(model, self.settings)

        if big_text.get_file() in self.tabs_by_filename:
            for tab_index in range(0, self.tabs.count()):
                widget : BigText = self.tabs.widget(tab_index)
                if widget.get_file() == big_text.get_file():
                    self.tabs.setCurrentIndex(tab_index)
                    break
        else:
            tab_index = self.tabs.addTab(big_text, model.get_tab_name())
            self.tabs_by_filename[big_text.get_file()] = big_text
            self.tabs.setCurrentIndex(tab_index)

    def _close_tab(self, tab_index: int):
        big_text: BigText = self.tabs.widget(tab_index)
        del self.tabs_by_filename[big_text.get_file()]
        self.tabs.removeTab(tab_index)