#!/usr/bin/env python3

import logging
import os
import sys
import time

from PySide2.QtCore import QObject, QThread, Signal, Slot
from PySide2.QtWidgets import (QApplication, QDialog, QLabel, QLineEdit, QProgressBar, QScrollArea, QTabBar,
                               QVBoxLayout, QFrame, QScroller)

import doc_manager

DOCS_PATH = os.environ['ORG_PATH']


class LoadDoneSignal(QObject):
    sig = Signal(doc_manager.DocumentManager)

class DocumentLoader(QThread):
    def __init__(self, manager):
        QThread.__init__(self, None)
        self.manager = manager
        self.signal = LoadDoneSignal()

    def run(self):
        self.manager.load()
        self.signal.sig.emit(self.manager)


class Dialog(QDialog):
    def __init__(self):
        super(Dialog, self).__init__()

        self.setWindowTitle("OrgEditor")
        scrSize = self.screen().size()
        self.resize(scrSize.width() / 1.5,
                    scrSize.height() / 1.5)
        self.loader = None
        self.manager = doc_manager.DocumentManager(DOCS_PATH)

        layout = QVBoxLayout()

        # Edit box
        self.progressBar = QProgressBar()
        self.progressBar.setRange(0, 0)  # Make undetermined
        layout.addWidget(self.progressBar)

        self.edit = QLineEdit("", placeholderText='Search for notes')
        layout.addWidget(self.edit)

        layout.setSpacing(0)

        self.results = QScrollArea(widgetResizable=True)
        layout.addWidget(self.results)
        QScroller.grabGesture(
            self.results.viewport(), QScroller.LeftMouseButtonGesture,
        )

        # Options
        self.tabBar = QTabBar(shape=QTabBar.RoundedSouth)

        self.tabBar.addTab("Agenda")
        self.tabBar.addTab("Notes")
        self.tabBar.addTab("Tasks")
        self.tabBar.currentChanged.connect(self.update_tab)

        layout.addWidget(self.tabBar)

        self.setLayout(layout)
        self.startLoad()

    @Slot()
    def update_tab(self):
        tabIndex = self.tabBar.currentIndex()
        if tabIndex == 0:
            self.loadAgenda()
        elif tabIndex == 1:
            self.loadNotes()
        elif tabIndex == 2:
            self.loadTasks()

    def startLoad(self):
        self.edit.setDisabled(True)
        self.edit.setVisible(False)
        self.tabBar.setDisabled(True)
        self.progressBar.setVisible(True)

        self.loader = DocumentLoader(self.manager)
        self.loader.signal.sig.connect(self.longoperationcomplete)
        self.loading_start_time = time.time()
        self.loader.start()

    def endLoad(self):
        self.edit.setDisabled(False)
        self.edit.setVisible(True)
        self.tabBar.setDisabled(False)
        self.progressBar.setVisible(False)

        self.update_tab()

    def longoperationcomplete(self, data):
        logging.info("Loading complete in {:.3f}s".format(time.time() - self.loading_start_time))
        self.endLoad()

    def loadAgenda(self):
        agenda = self.manager.get_agenda()
        old = self.results.layout()

        if old:
            print("Deleting old")
            old.deleteLater()

        layout = QVBoxLayout()

        for item in agenda.with_hour:
            text = "{} {} {}".format(
                item.scheduled.time,
                item.state,
                item.title,
            )
            label = QLabel(text=text)
            layout.addWidget(label)

        # if len(agenda.with_hour) > 0 and len(agenda.no_hour) > 0:
        #     layout.addWidget(QSplitter())

        for item in agenda.no_hour:
            text = "{} {} {}".format(
                item.scheduled.time,
                item.state,
                item.title,
            )
            label = QLabel(text=text)
            layout.addWidget(label)

        frame = QFrame(self.results)
        frame.setLayout(layout)
        self.results.setWidget(frame)

    def loadNotes(self):
        logging.warning("loadNotes not yet implemented")

    def loadTasks(self):
        logging.warning("loadTasks not yet implemented")

# Create the Qt Application
if __name__ == '__main__':
    logging.basicConfig(level=logging.INFO, format="%(levelname)-8s %(message)s")

    app = QApplication(sys.argv)

    dialog = Dialog()
    sys.exit(dialog.exec_())