"""Tool Supporting Basic Editor Functions"""
from typing import cast, Protocol
from PySide6.QtCore import QTimer
from PySide6.QtWidgets import QTextEdit, QVBoxLayout

import trovedb.trove as tr
from .tool import Tool


class ToolBasicEditor(Tool):
    def __init__(self, note, parent=None):
        super().__init__(note, parent)

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

        self._text_edit = QTextEdit()
        layout.addWidget(self._text_edit)

        self._content_dirty = False
        self._auto_save_timer = QTimer(self)
        self._auto_save_timer.setSingleShot(True)
        self._auto_save_timer.setInterval(2000)  # 2 seconds after typing stops
        self._auto_save_timer.timeout.connect(self._perform_auto_save)

        self._text_edit.textChanged.connect(self._schedule_auto_save)

        self.refresh()

    def refresh(self):
        self._text_edit.setPlainText(self.note.read_content().decode("utf-8"))
        self._content_dirty = False

    def _schedule_auto_save(self):
        self._content_dirty = True
        self._auto_save_timer.stop()
        self._auto_save_timer.start()

    def _perform_auto_save(self):
        if self._content_dirty:
            content = self._text_edit.toPlainText().encode("utf-8")
            self.note.write_content(content)
            self._content_dirty = False

    def closeEvent(self, event):
        if self._content_dirty:
            self._perform_auto_save()
        super().closeEvent(event)