from datetime import datetime, timedelta

from PyQt6.QtCore import Qt, QTime, QTimer, pyqtSignal, pyqtSlot
from PyQt6.QtGui import (
    QStandardItem,
    QStandardItemModel,
    QTextCursor,
    QTextDocument,
    QTextBlockFormat
)
from PyQt6.QtSql import QSqlQuery
from PyQt6.QtWidgets import QDialog

from main import query_error
from ui.SessionDialog import Ui_Dialog


class SessionDialog(QDialog, Ui_Dialog):
    WordIdRole = Qt.ItemDataRole.UserRole
    SectionIdRole = Qt.ItemDataRole.UserRole + 1
    BlockRole = Qt.ItemDataRole.UserRole + 2

    timer = QTimer()
    startTime = datetime.now()
    totalTime = 0  # seconds
    sessionStart = None
    sessionEnd = None
    blocks = QStandardItemModel()

    def __init__(self) -> None:
        super(SessionDialog, self).__init__()
        self.setupUi(self)
        self.wordView.setModel(QStandardItemModel())
        self.wordView.setWrapping(True)
        #
        # Connections
        #
        self.timer.timeout.connect(self.tickAction)
        self.activeBox.stateChanged.connect(self.activeAction)
        return

    @pyqtSlot()
    def resetForm(self) -> None:
        self.nameLbl.setText("")
        self.totalTime = timedelta()
        self.wordView.model().clear()
        self.textBrowser.document().clear()
        return

    @pyqtSlot(int)
    def setPerson(self, person_id) -> None:
        self.resetForm()
        self.person_id = person_id
        query = QSqlQuery()
        query.prepare("SELECT * FROM people " "WHERE person_id = :person_id")
        query.bindValue(":person_id", person_id)
        if not query.exec():
            query_error(query)
        if not query.next():
            raise Exception(f"Bad person_id: {person_id}")
        self.nameLbl.setText(query.value("name"))
        self.totalTime = timedelta()
        self.wordView.model().clear()
        return

    @pyqtSlot()
    def accept(self) -> None:
        print("Accepted")
        super().accept()
        return

    @pyqtSlot(int)
    def activeAction(self, state: int) -> None:
        if state:
            if not self.sessionStart:
                self.sessionStart = datetime.now()
            self.startTime = datetime.now()
            self.timer.start()
        else:
            self.totalTime = self.totalTime + (datetime.now() - self.startTime)
            self.timer.stop()
            self.sessionEnd = datetime.now()
        return

    @pyqtSlot()
    def timerAction(self) -> None:
        if self.activeBox.isChecked():  # we are stopping
            self.activeBox.setChecked(False)
            self.sender().setText("Start")
            return
        self.timer.setInterval(1000)
        self.sender().setText("Stop")
        self.activeBox.setChecked(True)
        return

    @pyqtSlot()
    def tickAction(self) -> None:
        delta = self.totalTime + (datetime.now() - self.startTime)
        seconds = delta.seconds % 60
        minutes = int(delta.seconds / 60) % 60
        hours = int(delta.seconds / 3600)
        self.timerLbl.setText(f"{hours:02d}:{minutes:02d}:{seconds:02d}")
        return

    @pyqtSlot(int)
    def addWord(self, word_id: int) -> None:
        if self.activeBox.isChecked():
            query = QSqlQuery()
            query.prepare("SELECT * FROM words " "WHERE word_id = :word_id")
            query.bindValue(":word_id", word_id)
            if not query.exec():
                query_error(query)
            if not query.next():
                raise Exception(f"Word_id({word_id}) not found in DB")
            word = QStandardItem()
            word.setData(query.value("word"), Qt.ItemDataRole.DisplayRole)
            word.setData(query.value("word_id"), SessionDialog.WordIdRole)
            model = self.wordView.model()
            matches = model.match(
                model.createIndex(0, 0),
                SessionDialog.WordIdRole,
                query.value("word_id"),
                1,
                Qt.MatchFlag.MatchExactly,
            )
            if len(matches) > 0:
                return
            self.wordView.model().appendRow(word)
            self.wordView.model().sort(0)
        else:
            print(f"Not active: {word_id}")
        return

    @pyqtSlot(int, int)
    def addBlock(self, section_id, block) -> None:
        new_block = QStandardItem()
        new_block.setData(section_id, SessionDialog.SectionIdRole)
        new_block.setData(block, SessionDialog.BlockRole)

        matches = self.blocks.match(
            self.blocks.createIndex(0, 0),
            SessionDialog.BlockRole,
            block,
            1,
            Qt.MatchFlag.MatchExactly,
        )
        if len(matches) > 0:
            return
        self.blocks.appendRow(new_block)
        query = QSqlQuery()
        query.prepare(
            "SELECT * FROM sections " "WHERE section_id = :section_id"
        )
        query.bindValue(":section_id", section_id)
        if not query.exec():
            query_error(query)
        if not query.next():
            raise Exception(f"Section not found {section_id}")
        document = QTextDocument()
        cursor = QTextCursor(document)
        cursor.setPosition(0)
        cursor.insertHtml(query.value("content"))
        textBlock = document.findBlockByNumber(block)
        blockFormat = QTextBlockFormat()
        blockFormat.setTextIndent(25.0)
        self.textBrowser.textCursor().setBlockFormat(blockFormat)
        self.textBrowser.textCursor().insertHtml('<p>'+textBlock.text()+'</p>')
        self.textBrowser.textCursor().insertBlock()
        return