import os
from typing import Mapping

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

from bigtext import BigText
from fulltabwidget import FullTabWidget
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, self.settings)
        full_tab = FullTabWidget(model)

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

    def _close_tab(self, tab_index: int):
        full_tab: FullTabWidget = self.tabs.widget(tab_index)
        full_tab.destruct()
        del self.tabs_by_filename[full_tab.file_view.get_file()]
        self.tabs.removeTab(tab_index)