from typing import Any, cast

from PySide6.QtCore import (
    QAbstractItemModel,
    QDir,
    QEvent,
    QFile,
    QModelIndex,
    QObject,
    QPersistentModelIndex,
    QPoint,
    QRect,
    QSize,
    Qt,
    QUrl,
    Signal,
    Slot,
)
from PySide6.QtGui import (
    QColor,
    QFont,
    QMouseEvent,
    QPainter,
    QPalette,
    QShowEvent,
    QTextDocument,
)
from PySide6.QtNetwork import (
    QNetworkAccessManager,
    QNetworkReply,
    QNetworkRequest,
)
from PySide6.QtWidgets import (
    QApplication,
    QSizePolicy,
    QStyle,
    QStyledItemDelegate,
    QStyleOptionViewItem,
    QTableView,
    QTextEdit,
    QWidget,
)

from pdfView import PDFViewer


class QStyleOptionViewItemInit(QStyleOptionViewItem):
    backgroundBrush: QColor
    rect: QRect
    widget: QWidget
    font: QFont
    text: str


class documentDelegate(QStyledItemDelegate):
    def initStyleOption(
        self,
        option: QStyleOptionViewItem,
        index: QModelIndex | QPersistentModelIndex,
        /,
    ) -> None:
        options = cast(QStyleOptionViewItemInit, option)
        super().initStyleOption(options, index)
        assert index.isValid() and isinstance(index, QModelIndex)
        if index.siblingAtColumn(6).data() == 0:
            options.backgroundBrush = QColor(0x444444)
        return

    def paint(
        self,
        painter: QPainter,
        option: QStyleOptionViewItem,
        index: QModelIndex | QPersistentModelIndex,
    ) -> None:
        options = cast(QStyleOptionViewItemInit, option)
        self.initStyleOption(options, index)
        painter.save()
        doc = QTextDocument()
        doc.setTextWidth(options.rect.width())
        doc.setHtml(options.text)
        options.text = ""
        options.widget.style().drawControl(
            QStyle.ControlElement.CE_ItemViewItem,
            options,
            painter,
        )
        painter.translate(options.rect.left(), options.rect.top())
        clip = QRect(0, 0, options.rect.width(), options.rect.height())
        doc.drawContents(painter, clip)
        painter.restore()
        return

    def sizeHint(
        self,
        option: QStyleOptionViewItem,
        index: QModelIndex | QPersistentModelIndex,
    ) -> QSize:
        options = cast(QStyleOptionViewItemInit, option)
        self.initStyleOption(options, index)
        doc = QTextDocument()
        doc.setTextWidth(options.rect.width())
        doc.setHtml(options.text)
        doc.setTextWidth(options.rect.width())
        return QSize(int(doc.idealWidth()), int(doc.size().height()))


class docketEntry(QTextEdit):
    def mousePressEvent(self, e: QMouseEvent) -> None:
        super().mousePressEvent(e)
        anchor = self.anchorAt(e.pos())
        print(f"self.size(): {self.size()}")
        if anchor:
            print(f"Anchors away: {anchor}")
            obj = cast(QObject, self)
            while not isinstance(obj, docketTableView) and obj is not None:
                obj = obj.parent()
            assert obj is not None
            index = obj.indexAt(obj.mapFromGlobal(self.mapToGlobal(e.pos())))
            obj.anchorSignal.emit(index, anchor)
        return

    def sizeHint(self) -> QSize:
        size = self.size()
        doc = QTextDocument()
        doc.setPlainText(self.document().toPlainText())
        doc.setTextWidth(size.width())
        docSize = doc.size()
        print(f"size: {size}, docSize: {docSize}")
        return QSize(size.width(), int(docSize.height()))


class docketTableView(QTableView):
    manager = QNetworkAccessManager()
    clickedEvent = Signal(QPoint)
    anchorSignal = Signal(QModelIndex, str)

    def __init__(self, parent: QWidget | None = None) -> None:
        super(docketTableView, self).__init__(parent)
        self.anchorSignal.connect(self.doAnchor)
        self.manager.finished.connect(self.getDone)
        return

    def setModel(self, model: QAbstractItemModel | None) -> None:
        assert model is not None
        super().setModel(model)
        self.model().modelReset.connect(self.modelReset)
        print("Setting Model")
        return

    @Slot(QNetworkReply)  # type: ignore
    def getDone(self, reply: QNetworkReply) -> None:
        dest = QFile("." + reply.url().path())
        dest.open(QFile.OpenModeFlag.WriteOnly)
        dest.write(reply.readAll())
        dest.close()
        reply.deleteLater()
        self.pdf = PDFViewer(self)
        self.pdf.load_pdf(dest)
        self.pdf.show()
        return

    @Slot(QModelIndex, str)  # type: ignore
    def doAnchor(self, index: QModelIndex, anchor: str) -> None:
        url = QUrl(anchor)
        print(f"{index.row()}, {index.column()} -> {url.path()}")
        dirs = url.path().split("/")
        dirs.pop()
        dirs.pop(0)
        currentDir = QDir()
        path = "/".join(dirs)
        currentDir.mkpath(path)
        if QDir("." + url.path()).exists():
            file = QFile("." + url.path())
            self.pdf = PDFViewer(self)
            self.pdf.load_pdf(file)
            self.pdf.show()
        else:
            self.manager.get(QNetworkRequest(url))
        return

    def modelReset(self) -> None:
        model = self.model()
        red = QPalette()
        red.setColor(QPalette.ColorRole.Base, Qt.GlobalColor.red)
        for row in range(0, model.rowCount()):
            index = model.index(row, 1)
            widget = docketEntry()
            widget.setHtml(model.data(index, Qt.ItemDataRole.DisplayRole))
            widget.setAutoFillBackground(False)
            widget.setReadOnly(True)
            widget.setPalette(red)
            self.setIndexWidget(index, widget)
        return