# Copyright (C) 2024 Travis Abendshien (CyanVoxel).
# Licensed under the GPL-3.0 License.
# Created for TagStudio: https://github.com/CyanVoxel/TagStudio

import logging
from pathlib import Path
import time
import typing
from datetime import datetime as dt

import cv2
import rawpy
from PIL import Image, UnidentifiedImageError
from PIL.Image import DecompressionBombError
from PySide6.QtCore import Signal, Qt, QSize
from PySide6.QtGui import QResizeEvent, QAction
from PySide6.QtWidgets import (
    QWidget,
    QVBoxLayout,
    QHBoxLayout,
    QLabel,
    QPushButton,
    QScrollArea,
    QFrame,
    QSplitter,
    QSizePolicy,
    QMessageBox,
)
from humanfriendly import format_size

from src.core.enums import SettingItems, Theme
from src.core.library import Entry, ItemType, Library
from src.core.constants import VIDEO_TYPES, IMAGE_TYPES, RAW_IMAGE_TYPES, TS_FOLDER_NAME
from src.qt.helpers.file_opener import FileOpenerLabel, FileOpenerHelper, open_file
from src.qt.modals.add_field import AddFieldModal
from src.qt.widgets.thumb_renderer import ThumbRenderer
from src.qt.widgets.fields import FieldContainer
from src.qt.widgets.tag_box import TagBoxWidget
from src.qt.widgets.text import TextWidget
from src.qt.widgets.panel import PanelModal
from src.qt.widgets.text_box_edit import EditTextBox
from src.qt.widgets.text_line_edit import EditTextLine
from src.qt.widgets.video_player import VideoPlayer


# Only import for type checking/autocompletion, will not be imported at runtime.
if typing.TYPE_CHECKING:
    from src.qt.ts_qt import QtDriver

ERROR = "[ERROR]"
WARNING = "[WARNING]"
INFO = "[INFO]"

logging.basicConfig(format="%(message)s", level=logging.INFO)


class PreviewPanel(QWidget):
    """The Preview Panel Widget."""

    tags_updated = Signal()

    def __init__(self, library: Library, driver: "QtDriver"):
        super().__init__()
        self.lib = library
        self.driver: QtDriver = driver
        self.initialized = False
        self.isOpen: bool = False
        # self.filepath = None
        # self.item = None # DEPRECATED, USE self.selected
        self.common_fields: list = []
        self.mixed_fields: list = []
        self.selected: list[tuple[ItemType, int]] = []  # New way of tracking items
        self.tag_callback = None
        self.containers: list[QWidget] = []

        self.img_button_size: tuple[int, int] = (266, 266)
        self.image_ratio: float = 1.0

        self.image_container = QWidget()
        image_layout = QHBoxLayout(self.image_container)
        image_layout.setContentsMargins(0, 0, 0, 0)

        self.open_file_action = QAction("Open file", self)
        self.open_explorer_action = QAction("Open file in explorer", self)

        self.preview_img = QPushButton()
        self.preview_img.setMinimumSize(*self.img_button_size)
        self.preview_img.setFlat(True)
        self.preview_img.setContextMenuPolicy(Qt.ContextMenuPolicy.ActionsContextMenu)

        self.preview_img.addAction(self.open_file_action)
        self.preview_img.addAction(self.open_explorer_action)
        self.preview_vid = VideoPlayer(driver)
        self.preview_vid.hide()
        self.thumb_renderer = ThumbRenderer()
        self.thumb_renderer.updated.connect(
            lambda ts, i, s: (self.preview_img.setIcon(i))
        )
        self.thumb_renderer.updated_ratio.connect(
            lambda ratio: (
                self.set_image_ratio(ratio),
                self.update_image_size(
                    (
                        self.image_container.size().width(),
                        self.image_container.size().height(),
                    ),
                    ratio,
                ),
            )
        )

        image_layout.addWidget(self.preview_img)
        image_layout.setAlignment(self.preview_img, Qt.AlignmentFlag.AlignCenter)
        image_layout.addWidget(self.preview_vid)
        image_layout.setAlignment(self.preview_vid, Qt.AlignmentFlag.AlignCenter)
        self.image_container.setMinimumSize(*self.img_button_size)
        self.file_label = FileOpenerLabel("Filename")
        self.file_label.setWordWrap(True)
        self.file_label.setTextInteractionFlags(
            Qt.TextInteractionFlag.TextSelectableByMouse
        )
        self.file_label.setStyleSheet("font-weight: bold; font-size: 12px")

        self.dimensions_label = QLabel("Dimensions")
        self.dimensions_label.setWordWrap(True)
        # self.dim_label.setTextInteractionFlags(
        # 	Qt.TextInteractionFlag.TextSelectableByMouse)

        properties_style = (
            f"background-color:{Theme.COLOR_BG.value};"
            f"font-family:Oxanium;"
            f"font-weight:bold;"
            f"font-size:12px;"
            f"border-radius:6px;"
            f"padding-top: 4px;"
            f"padding-right: 1px;"
            f"padding-bottom: 1px;"
            f"padding-left: 1px;"
        )

        self.dimensions_label.setStyleSheet(properties_style)

        self.scroll_layout = QVBoxLayout()
        self.scroll_layout.setAlignment(Qt.AlignmentFlag.AlignTop)
        self.scroll_layout.setContentsMargins(6, 1, 6, 6)

        scroll_container: QWidget = QWidget()
        scroll_container.setObjectName("entryScrollContainer")
        scroll_container.setLayout(self.scroll_layout)

        info_section = QWidget()
        info_layout = QVBoxLayout(info_section)
        info_layout.setContentsMargins(0, 0, 0, 0)
        info_layout.setSpacing(6)

        scroll_area = QScrollArea()
        scroll_area.setObjectName("entryScrollArea")
        scroll_area.setSizePolicy(
            QSizePolicy.Policy.Expanding, QSizePolicy.Policy.Expanding
        )
        scroll_area.setHorizontalScrollBarPolicy(Qt.ScrollBarPolicy.ScrollBarAsNeeded)
        scroll_area.setWidgetResizable(True)
        scroll_area.setFrameShadow(QFrame.Shadow.Plain)
        scroll_area.setFrameShape(QFrame.Shape.NoFrame)
        # NOTE: I would rather have this style applied to the scroll_area
        # background and NOT the scroll container background, so that the
        # rounded corners are maintained when scrolling. I was unable to
        # find the right trick to only select that particular element.
        scroll_area.setStyleSheet(
            "QWidget#entryScrollContainer{"
            f"background: {Theme.COLOR_BG.value};"
            "border-radius:6px;"
            "}"
        )
        scroll_area.setWidget(scroll_container)

        info_layout.addWidget(self.file_label)
        info_layout.addWidget(self.dimensions_label)
        info_layout.addWidget(scroll_area)

        # keep list of rendered libraries to avoid needless re-rendering
        self.render_libs: set = set()
        self.libs_layout = QVBoxLayout()
        self.fill_libs_widget(self.libs_layout)

        self.libs_flow_container: QWidget = QWidget()
        self.libs_flow_container.setObjectName("librariesList")
        self.libs_flow_container.setLayout(self.libs_layout)
        self.libs_flow_container.setSizePolicy(
            QSizePolicy.Preferred,  # type: ignore
            QSizePolicy.Maximum,  # type: ignore
        )

        # set initial visibility based on settings
        if not self.driver.settings.value(
            SettingItems.WINDOW_SHOW_LIBS, True, type=bool
        ):
            self.libs_flow_container.hide()

        splitter = QSplitter()
        splitter.setOrientation(Qt.Orientation.Vertical)
        splitter.setHandleWidth(12)
        splitter.splitterMoved.connect(
            lambda: self.update_image_size(
                (
                    self.image_container.size().width(),
                    self.image_container.size().height(),
                )
            )
        )

        splitter.addWidget(self.image_container)
        splitter.addWidget(info_section)
        splitter.addWidget(self.libs_flow_container)
        splitter.setStretchFactor(1, 2)

        self.afb_container = QWidget()
        self.afb_layout = QVBoxLayout(self.afb_container)
        self.afb_layout.setContentsMargins(0, 12, 0, 0)

        self.add_field_button = QPushButton()
        self.add_field_button.setCursor(Qt.CursorShape.PointingHandCursor)
        self.add_field_button.setMinimumSize(96, 28)
        self.add_field_button.setMaximumSize(96, 28)
        self.add_field_button.setText("Add Field")
        self.afb_layout.addWidget(self.add_field_button)
        self.afm = AddFieldModal(self.lib)
        self.place_add_field_button()
        self.update_image_size(
            (self.image_container.size().width(), self.image_container.size().height())
        )

        root_layout = QHBoxLayout(self)
        root_layout.setContentsMargins(0, 0, 0, 0)
        root_layout.addWidget(splitter)

    def fill_libs_widget(self, layout: QVBoxLayout):
        settings = self.driver.settings
        settings.beginGroup(SettingItems.LIBS_LIST)
        lib_items: dict[str, tuple[str, str]] = {}
        for item_tstamp in settings.allKeys():
            val: str = settings.value(item_tstamp)  # type: ignore
            cut_val = val
            if len(val) > 45:
                cut_val = f"{val[0:10]} ... {val[-10:]}"
            lib_items[item_tstamp] = (val, cut_val)

        settings.endGroup()

        new_keys = set(lib_items.keys())
        if new_keys == self.render_libs:
            # no need to re-render
            return

        # sort lib_items by the key
        libs_sorted = sorted(lib_items.items(), key=lambda item: item[0], reverse=True)

        self.render_libs = new_keys
        self._fill_libs_widget(libs_sorted, layout)

    def _fill_libs_widget(
        self, libraries: list[tuple[str, tuple[str, str]]], layout: QVBoxLayout
    ):
        def clear_layout(layout_item: QVBoxLayout):
            for i in reversed(range(layout_item.count())):
                child = layout_item.itemAt(i)
                if child.widget() is not None:
                    child.widget().deleteLater()
                elif child.layout() is not None:
                    clear_layout(child.layout())  # type: ignore

        # remove any potential previous items
        clear_layout(layout)

        label = QLabel("Recent Libraries")
        label.setAlignment(Qt.AlignCenter)  # type: ignore

        row_layout = QHBoxLayout()
        row_layout.addWidget(label)
        layout.addLayout(row_layout)

        def set_button_style(btn: QPushButton, extras: list[str] | None = None):
            base_style = [
                f"background-color:{Theme.COLOR_BG.value};",
                "border-radius:6px;",
                "text-align: left;",
                "padding-top: 3px;",
                "padding-left: 6px;",
                "padding-bottom: 4px;",
            ]

            full_style_rows = base_style + (extras or [])

            btn.setStyleSheet(
                (
                    "QPushButton{"
                    f"{''.join(full_style_rows)}"
                    "}"
                    f"QPushButton::hover{{background-color:{Theme.COLOR_HOVER.value};}}"
                    f"QPushButton::pressed{{background-color:{Theme.COLOR_PRESSED.value};}}"
                    f"QPushButton::disabled{{background-color:{Theme.COLOR_DISABLED_BG.value};}}"
                )
            )
            btn.setCursor(Qt.CursorShape.PointingHandCursor)

        for item_key, (full_val, cut_val) in libraries:
            button = QPushButton(text=cut_val)
            button.setObjectName(f"path{item_key}")

            lib = Path(full_val)
            if not lib.exists() or not (lib / TS_FOLDER_NAME).exists():
                button.setDisabled(True)
                button.setToolTip("Location is missing")

            def open_library_button_clicked(path):
                return lambda: self.driver.open_library(Path(path))

            button.clicked.connect(open_library_button_clicked(full_val))
            set_button_style(button)

            button_remove = QPushButton("➖")
            button_remove.setCursor(Qt.CursorShape.PointingHandCursor)
            button_remove.setFixedWidth(30)
            set_button_style(button_remove)

            def remove_recent_library_clicked(key: str):
                return lambda: (
                    self.driver.remove_recent_library(key),
                    self.fill_libs_widget(self.libs_layout),
                )

            button_remove.clicked.connect(remove_recent_library_clicked(item_key))

            row_layout = QHBoxLayout()
            row_layout.addWidget(button)
            row_layout.addWidget(button_remove)

            layout.addLayout(row_layout)

    def resizeEvent(self, event: QResizeEvent) -> None:
        self.update_image_size(
            (self.image_container.size().width(), self.image_container.size().height())
        )
        return super().resizeEvent(event)

    def get_preview_size(self) -> tuple[int, int]:
        return (
            self.image_container.size().width(),
            self.image_container.size().height(),
        )

    def set_image_ratio(self, ratio: float):
        # logging.info(f'Updating Ratio to: {ratio} #####################################################')
        self.image_ratio = ratio

    def update_image_size(self, size: tuple[int, int], ratio: float = None):
        if ratio:
            self.set_image_ratio(ratio)
        # self.img_button_size = size
        # logging.info(f'')
        # self.preview_img.setMinimumSize(64,64)

        adj_width: float = size[0]
        adj_height: float = size[1]
        # Landscape
        if self.image_ratio > 1:
            # logging.info('Landscape')
            adj_height = size[0] * (1 / self.image_ratio)
        # Portrait
        elif self.image_ratio <= 1:
            # logging.info('Portrait')
            adj_width = size[1] * self.image_ratio

        if adj_width > size[0]:
            adj_height = adj_height * (size[0] / adj_width)
            adj_width = size[0]
        elif adj_height > size[1]:
            adj_width = adj_width * (size[1] / adj_height)
            adj_height = size[1]

        # adj_width = min(adj_width, self.image_container.size().width())
        # adj_height = min(adj_width, self.image_container.size().height())

        # self.preview_img.setMinimumSize(s)
        # self.preview_img.setMaximumSize(s_max)
        adj_size = QSize(int(adj_width), int(adj_height))
        self.img_button_size = (int(adj_width), int(adj_height))
        self.preview_img.setMaximumSize(adj_size)
        self.preview_img.setIconSize(adj_size)
        self.preview_vid.resizeVideo(adj_size)
        self.preview_vid.setMaximumSize(adj_size)
        self.preview_vid.setMinimumSize(adj_size)
        # self.preview_img.setMinimumSize(adj_size)

        # if self.preview_img.iconSize().toTuple()[0] < self.preview_img.size().toTuple()[0] + 10:
        # 	if type(self.item) == Entry:
        # 		filepath = os.path.normpath(f'{self.lib.library_dir}/{self.item.path}/{self.item.filename}')
        # 		self.thumb_renderer.render(time.time(), filepath, self.preview_img.size().toTuple(), self.devicePixelRatio(),update_on_ratio_change=True)

        # logging.info(f' Img Aspect Ratio: {self.image_ratio}')
        # logging.info(f'  Max Button Size: {size}')
        # logging.info(f'Container Size: {(self.image_container.size().width(), self.image_container.size().height())}')
        # logging.info(f'Final Button Size: {(adj_width, adj_height)}')
        # logging.info(f'')
        # logging.info(f'  Icon Size: {self.preview_img.icon().actualSize().toTuple()}')
        # logging.info(f'Button Size: {self.preview_img.size().toTuple()}')

    def place_add_field_button(self):
        self.scroll_layout.addWidget(self.afb_container)
        self.scroll_layout.setAlignment(
            self.afb_container, Qt.AlignmentFlag.AlignHCenter
        )

        try:
            self.afm.done.disconnect()
            self.add_field_button.clicked.disconnect()
        except RuntimeError:
            pass

        # self.afm.done.connect(lambda f: (self.lib.add_field_to_entry(self.selected[0][1], f), self.update_widgets()))
        self.afm.done.connect(
            lambda f: (self.add_field_to_selected(f), self.update_widgets())
        )
        self.add_field_button.clicked.connect(self.afm.show)

    def add_field_to_selected(self, field_id: int):
        """Adds an entry field to one or more selected items."""
        added = set()
        for item_pair in self.selected:
            if item_pair[0] == ItemType.ENTRY and item_pair[1] not in added:
                self.lib.add_field_to_entry(item_pair[1], field_id)
                added.add(item_pair[1])

    # def update_widgets(self, item: Union[Entry, Collation, Tag]):
    def update_widgets(self):
        """
        Renders the panel's widgets with the newest data from the Library.
        """
        logging.info(f"[ENTRY PANEL] UPDATE WIDGETS ({self.driver.selected})")
        self.isOpen = True
        # self.tag_callback = tag_callback if tag_callback else None
        window_title = ""

        # update list of libraries
        self.fill_libs_widget(self.libs_layout)

        # 0 Selected Items
        if not self.driver.selected:
            if self.selected or not self.initialized:
                self.file_label.setText("No Items Selected")
                self.file_label.setFilePath("")
                self.file_label.setCursor(Qt.CursorShape.ArrowCursor)

                self.dimensions_label.setText("")
                self.preview_img.setContextMenuPolicy(
                    Qt.ContextMenuPolicy.NoContextMenu
                )
                self.preview_img.setCursor(Qt.CursorShape.ArrowCursor)

                ratio: float = self.devicePixelRatio()
                self.thumb_renderer.render(
                    time.time(),
                    "",
                    (512, 512),
                    ratio,
                    True,
                    update_on_ratio_change=True,
                )
                try:
                    self.preview_img.clicked.disconnect()
                except RuntimeError:
                    pass
                for i, c in enumerate(self.containers):
                    c.setHidden(True)
            self.preview_img.show()
            self.preview_vid.stop()
            self.preview_vid.hide()
            self.selected = list(self.driver.selected)
            self.add_field_button.setHidden(True)

        # 1 Selected Item
        elif len(self.driver.selected) == 1:
            # 1 Selected Entry
            if self.driver.selected[0][0] == ItemType.ENTRY:
                self.preview_img.show()
                self.preview_vid.stop()
                self.preview_vid.hide()
                item: Entry = self.lib.get_entry(self.driver.selected[0][1])
                # If a new selection is made, update the thumbnail and filepath.
                if not self.selected or self.selected != self.driver.selected:
                    filepath = self.lib.library_dir / item.path / item.filename
                    self.file_label.setFilePath(filepath)
                    window_title = str(filepath)
                    ratio: float = self.devicePixelRatio()
                    self.thumb_renderer.render(
                        time.time(),
                        filepath,
                        (512, 512),
                        ratio,
                        update_on_ratio_change=True,
                    )
                    self.file_label.setText("\u200b".join(str(filepath)))
                    self.file_label.setCursor(Qt.CursorShape.PointingHandCursor)

                    self.preview_img.setContextMenuPolicy(
                        Qt.ContextMenuPolicy.ActionsContextMenu
                    )
                    self.preview_img.setCursor(Qt.CursorShape.PointingHandCursor)

                    self.opener = FileOpenerHelper(filepath)
                    self.open_file_action.triggered.connect(self.opener.open_file)
                    self.open_explorer_action.triggered.connect(
                        self.opener.open_explorer
                    )

                    # TODO: Do this somewhere else, this is just here temporarily.
                    try:
                        image = None
                        if filepath.suffix.lower() in IMAGE_TYPES:
                            image = Image.open(str(filepath))
                        elif filepath.suffix.lower() in RAW_IMAGE_TYPES:
                            try:
                                with rawpy.imread(str(filepath)) as raw:
                                    rgb = raw.postprocess()
                                    image = Image.new(
                                        "L", (rgb.shape[1], rgb.shape[0]), color="black"
                                    )
                            except (
                                rawpy._rawpy.LibRawIOError,
                                rawpy._rawpy.LibRawFileUnsupportedError,
                            ):
                                pass
                        elif filepath.suffix.lower() in VIDEO_TYPES:
                            video = cv2.VideoCapture(str(filepath))
                            video.set(cv2.CAP_PROP_POS_FRAMES, 0)
                            success, frame = video.read()
                            frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
                            image = Image.fromarray(frame)
                            if success:
                                self.preview_img.hide()
                                self.preview_vid.play(
                                    filepath, QSize(image.width, image.height)
                                )
                                self.resizeEvent(
                                    QResizeEvent(
                                        QSize(image.width, image.height),
                                        QSize(image.width, image.height),
                                    )
                                )
                                self.preview_vid.show()

                        # Stats for specific file types are displayed here.
                        if image and filepath.suffix.lower() in (
                            IMAGE_TYPES + VIDEO_TYPES + RAW_IMAGE_TYPES
                        ):
                            self.dimensions_label.setText(
                                f"{filepath.suffix.upper()[1:]}  •  {format_size(filepath.stat().st_size)}\n{image.width} x {image.height} px"
                            )
                        else:
                            self.dimensions_label.setText(
                                f"{filepath.suffix.upper()[1:]}  •  {format_size(filepath.stat().st_size)}"
                            )

                        if not filepath.is_file():
                            raise FileNotFoundError

                    except FileNotFoundError as e:
                        self.dimensions_label.setText(f"{filepath.suffix.upper()[1:]}")
                        logging.info(
                            f"[PreviewPanel][ERROR] Couldn't Render thumbnail for {filepath} (because of {e})"
                        )

                    except (FileNotFoundError, cv2.error) as e:
                        self.dimensions_label.setText(f"{filepath.suffix.upper()}")
                        logging.info(
                            f"[PreviewPanel][ERROR] Couldn't Render thumbnail for {filepath} (because of {e})"
                        )
                    except (
                        UnidentifiedImageError,
                        DecompressionBombError,
                    ) as e:
                        self.dimensions_label.setText(
                            f"{filepath.suffix.upper()[1:]}  •  {format_size(filepath.stat().st_size)}"
                        )
                        logging.info(
                            f"[PreviewPanel][ERROR] Couldn't Render thumbnail for {filepath} (because of {e})"
                        )

                    try:
                        self.preview_img.clicked.disconnect()
                    except RuntimeError:
                        pass
                    self.preview_img.clicked.connect(
                        lambda checked=False, filepath=filepath: open_file(filepath)
                    )

                self.selected = list(self.driver.selected)
                for i, f in enumerate(item.fields):
                    self.write_container(i, f)

                # Hide leftover containers
                if len(self.containers) > len(item.fields):
                    for i, c in enumerate(self.containers):
                        if i > (len(item.fields) - 1):
                            c.setHidden(True)

                self.add_field_button.setHidden(False)

            # 1 Selected Collation
            elif self.driver.selected[0][0] == ItemType.COLLATION:
                pass

            # 1 Selected Tag
            elif self.driver.selected[0][0] == ItemType.TAG_GROUP:
                pass

        # Multiple Selected Items
        elif len(self.driver.selected) > 1:
            self.preview_img.show()
            self.preview_vid.stop()
            self.preview_vid.hide()
            if self.selected != self.driver.selected:
                self.file_label.setText(f"{len(self.driver.selected)} Items Selected")
                self.file_label.setCursor(Qt.CursorShape.ArrowCursor)
                self.file_label.setFilePath("")
                self.dimensions_label.setText("")

                self.preview_img.setContextMenuPolicy(
                    Qt.ContextMenuPolicy.NoContextMenu
                )
                self.preview_img.setCursor(Qt.CursorShape.ArrowCursor)

                ratio: float = self.devicePixelRatio()
                self.thumb_renderer.render(
                    time.time(),
                    "",
                    (512, 512),
                    ratio,
                    True,
                    update_on_ratio_change=True,
                )
                try:
                    self.preview_img.clicked.disconnect()
                except RuntimeError:
                    pass

            self.common_fields = []
            self.mixed_fields = []
            for i, item_pair in enumerate(self.driver.selected):
                if item_pair[0] == ItemType.ENTRY:
                    item = self.lib.get_entry(item_pair[1])
                    if i == 0:
                        for f in item.fields:
                            self.common_fields.append(f)
                    else:
                        common_to_remove = []
                        for f in self.common_fields:
                            # Common field found (Same ID, identical content)
                            if f not in item.fields:
                                common_to_remove.append(f)

                                # Mixed field found (Same ID, different content)
                                if self.lib.get_field_index_in_entry(
                                    item, self.lib.get_field_attr(f, "id")
                                ):
                                    # if self.lib.get_field_attr(f, 'type') == ('tag_box'):
                                    # 	pass
                                    # logging.info(f)
                                    # logging.info(type(f))
                                    f_stripped = {
                                        self.lib.get_field_attr(f, "id"): None
                                    }
                                    if f_stripped not in self.mixed_fields and (
                                        f not in self.common_fields
                                        or f in common_to_remove
                                    ):
                                        #  and (f not in self.common_fields or f in common_to_remove)
                                        self.mixed_fields.append(f_stripped)
                        self.common_fields = [
                            f for f in self.common_fields if f not in common_to_remove
                        ]
            order: list[int] = (
                [0]
                + [1, 2]
                + [9, 17, 18, 19, 20]
                + [8, 7, 6]
                + [4]
                + [3, 21]
                + [10, 14, 11, 12, 13, 22]
                + [5]
            )
            self.mixed_fields = sorted(
                self.mixed_fields,
                key=lambda x: order.index(self.lib.get_field_attr(x, "id")),
            )

            self.selected = list(self.driver.selected)
            for i, f in enumerate(self.common_fields):
                logging.info(f"ci:{i}, f:{f}")
                self.write_container(i, f)
            for i, f in enumerate(self.mixed_fields, start=len(self.common_fields)):
                logging.info(f"mi:{i}, f:{f}")
                self.write_container(i, f, mixed=True)

            # Hide leftover containers
            if len(self.containers) > len(self.common_fields) + len(self.mixed_fields):
                for i, c in enumerate(self.containers):
                    if i > (len(self.common_fields) + len(self.mixed_fields) - 1):
                        c.setHidden(True)

            self.add_field_button.setHidden(False)

        self.initialized = True

        # # Uninitialized or New Item:
        # if not self.item or self.item.id != item.id:
        # 	# logging.info(f'Uninitialized or New Item ({item.id})')
        # 	if type(item) == Entry:
        # 		# New Entry: Render preview and update filename label
        # 		filepath = os.path.normpath(f'{self.lib.library_dir}/{item.path}/{item.filename}')
        # 		window_title = filepath
        # 		ratio: float = self.devicePixelRatio()
        # 		self.thumb_renderer.render(time.time(), filepath, (512, 512), ratio,update_on_ratio_change=True)
        # 		self.file_label.setText("\u200b".join(filepath))

        # 		# TODO: Deal with this later.
        # 		# https://stackoverflow.com/questions/64252654/pyqt5-drag-and-drop-into-system-file-explorer-with-delayed-encoding
        # 		# https://doc.qt.io/qtforpython-5/PySide2/QtCore/QMimeData.html#more
        # 		# drag = QDrag(self.preview_img)
        # 		# mime = QMimeData()
        # 		# mime.setUrls([filepath])
        # 		# drag.setMimeData(mime)
        # 		# drag.exec_(Qt.DropAction.CopyAction)

        # 		try:
        # 			self.preview_img.clicked.disconnect()
        # 		except RuntimeError:
        # 			pass
        # 		self.preview_img.clicked.connect(
        # 			lambda checked=False, filepath=filepath: open_file(filepath))

        # 		for i, f in enumerate(item.fields):
        # 			self.write_container(item, i, f)

        # 		self.item = item

        # 		# try:
        # 		# 	self.tags_updated.disconnect()
        # 		# except RuntimeError:
        # 		# 	pass
        # 		# if self.tag_callback:
        # 		# 	# logging.info(f'[UPDATE CONTAINER] Updating Callback for {item.id}: {self.tag_callback}')
        # 		# 	self.tags_updated.connect(self.tag_callback)

        # # Initialized, Updating:
        # elif self.item and self.item.id == item.id:
        # 	# logging.info(f'Initialized Item, Updating! ({item.id})')
        # 	for i, f in enumerate(item.fields):
        # 		self.write_container(item, i, f)

        # # Hide leftover containers
        # if len(self.containers) > len(self.item.fields):
        # 	for i, c in enumerate(self.containers):
        # 		if i > (len(self.item.fields) - 1):
        # 			c.setHidden(True)

        self.setWindowTitle(window_title)
        self.show()

    def set_tags_updated_slot(self, slot: object):
        """
        Replacement for tag_callback.
        """
        try:
            self.tags_updated.disconnect()
        except RuntimeError:
            pass
        logging.info("[UPDATE CONTAINER] Setting tags updated slot")
        self.tags_updated.connect(slot)

    # def write_container(self, item:Union[Entry, Collation, Tag], index, field):
    def write_container(self, index, field, mixed=False):
        """Updates/Creates data for a FieldContainer."""
        # logging.info(f'[ENTRY PANEL] WRITE CONTAINER')
        # Remove 'Add Field' button from scroll_layout, to be re-added later.
        self.scroll_layout.takeAt(self.scroll_layout.count() - 1).widget()
        container: FieldContainer = None
        if len(self.containers) < (index + 1):
            container = FieldContainer()
            self.containers.append(container)
            self.scroll_layout.addWidget(container)
        else:
            container = self.containers[index]
            # container.inner_layout.removeItem(container.inner_layout.itemAt(1))
            # container.setHidden(False)
        if self.lib.get_field_attr(field, "type") == "tag_box":
            # logging.info(f'WRITING TAGBOX FOR ITEM {item.id}')
            container.set_title(self.lib.get_field_attr(field, "name"))
            # container.set_editable(False)
            container.set_inline(False)
            title = f"{self.lib.get_field_attr(field, 'name')} (Tag Box)"
            if not mixed:
                item = self.lib.get_entry(
                    self.selected[0][1]
                )  # TODO TODO TODO: TEMPORARY
                if type(container.get_inner_widget()) == TagBoxWidget:
                    inner_container: TagBoxWidget = container.get_inner_widget()
                    inner_container.set_item(item)
                    inner_container.set_tags(self.lib.get_field_attr(field, "content"))
                    try:
                        inner_container.updated.disconnect()
                    except RuntimeError:
                        pass
                    # inner_container.updated.connect(lambda f=self.filepath, i=item: self.write_container(item, index, field))
                else:
                    inner_container = TagBoxWidget(
                        item,
                        title,
                        index,
                        self.lib,
                        self.lib.get_field_attr(field, "content"),
                        self.driver,
                    )

                    container.set_inner_widget(inner_container)
                inner_container.field = field
                inner_container.updated.connect(
                    lambda: (
                        self.write_container(index, field),
                        self.tags_updated.emit(),
                    )
                )
                # if type(item) == Entry:
                # NOTE: Tag Boxes have no Edit Button (But will when you can convert field types)
                # f'Are you sure you want to remove this \"{self.lib.get_field_attr(field, "name")}\" field?'
                # container.set_remove_callback(lambda: (self.lib.get_entry(item.id).fields.pop(index), self.update_widgets(item)))
                prompt = f'Are you sure you want to remove this "{self.lib.get_field_attr(field, "name")}" field?'
                callback = lambda: (self.remove_field(field), self.update_widgets())
                container.set_remove_callback(
                    lambda: self.remove_message_box(prompt=prompt, callback=callback)
                )
                container.set_copy_callback(None)
                container.set_edit_callback(None)
            else:
                text = "<i>Mixed Data</i>"
                title = f"{self.lib.get_field_attr(field, 'name')} (Wacky Tag Box)"
                inner_container = TextWidget(title, text)
                container.set_inner_widget(inner_container)
                container.set_copy_callback(None)
                container.set_edit_callback(None)
                container.set_remove_callback(None)

            self.tags_updated.emit()
            # self.dynamic_widgets.append(inner_container)
        elif self.lib.get_field_attr(field, "type") in "text_line":
            # logging.info(f'WRITING TEXTLINE FOR ITEM {item.id}')
            container.set_title(self.lib.get_field_attr(field, "name"))
            # container.set_editable(True)
            container.set_inline(False)
            # Normalize line endings in any text content.
            if not mixed:
                text = self.lib.get_field_attr(field, "content").replace("\r", "\n")
            else:
                text = "<i>Mixed Data</i>"
            title = f"{self.lib.get_field_attr(field, 'name')} (Text Line)"
            inner_container = TextWidget(title, text)
            container.set_inner_widget(inner_container)
            # if type(item) == Entry:
            if not mixed:
                modal = PanelModal(
                    EditTextLine(self.lib.get_field_attr(field, "content")),
                    title=title,
                    window_title=f'Edit {self.lib.get_field_attr(field, "name")}',
                    save_callback=(
                        lambda content: (
                            self.update_field(field, content),
                            self.update_widgets(),
                        )
                    ),
                )
                container.set_edit_callback(modal.show)
                prompt = f'Are you sure you want to remove this "{self.lib.get_field_attr(field, "name")}" field?'
                callback = lambda: (self.remove_field(field), self.update_widgets())
                container.set_remove_callback(
                    lambda: self.remove_message_box(prompt=prompt, callback=callback)
                )
                container.set_copy_callback(None)
            else:
                container.set_edit_callback(None)
                container.set_copy_callback(None)
                container.set_remove_callback(None)
            # container.set_remove_callback(lambda: (self.lib.get_entry(item.id).fields.pop(index), self.update_widgets(item)))

        elif self.lib.get_field_attr(field, "type") in "text_box":
            # logging.info(f'WRITING TEXTBOX FOR ITEM {item.id}')
            container.set_title(self.lib.get_field_attr(field, "name"))
            # container.set_editable(True)
            container.set_inline(False)
            # Normalize line endings in any text content.
            if not mixed:
                text = self.lib.get_field_attr(field, "content").replace("\r", "\n")
            else:
                text = "<i>Mixed Data</i>"
            title = f"{self.lib.get_field_attr(field, 'name')} (Text Box)"
            inner_container = TextWidget(title, text)
            container.set_inner_widget(inner_container)
            # if type(item) == Entry:
            if not mixed:
                container.set_copy_callback(None)
                modal = PanelModal(
                    EditTextBox(self.lib.get_field_attr(field, "content")),
                    title=title,
                    window_title=f'Edit {self.lib.get_field_attr(field, "name")}',
                    save_callback=(
                        lambda content: (
                            self.update_field(field, content),
                            self.update_widgets(),
                        )
                    ),
                )
                container.set_edit_callback(modal.show)
                prompt = f'Are you sure you want to remove this "{self.lib.get_field_attr(field, "name")}" field?'
                callback = lambda: (self.remove_field(field), self.update_widgets())
                container.set_remove_callback(
                    lambda: self.remove_message_box(prompt=prompt, callback=callback)
                )
            else:
                container.set_edit_callback(None)
                container.set_copy_callback(None)
                container.set_remove_callback(None)
        elif self.lib.get_field_attr(field, "type") == "collation":
            # logging.info(f'WRITING COLLATION FOR ITEM {item.id}')
            container.set_title(self.lib.get_field_attr(field, "name"))
            # container.set_editable(True)
            container.set_inline(False)
            collation = self.lib.get_collation(
                self.lib.get_field_attr(field, "content")
            )
            title = f"{self.lib.get_field_attr(field, 'name')} (Collation)"
            text = f"{collation.title} ({len(collation.e_ids_and_pages)} Items)"
            if len(self.selected) == 1:
                text += f" - Page {collation.e_ids_and_pages[[x[0] for x in collation.e_ids_and_pages].index(self.selected[0][1])][1]}"
            inner_container = TextWidget(title, text)
            container.set_inner_widget(inner_container)
            # if type(item) == Entry:
            container.set_copy_callback(None)
            # container.set_edit_callback(None)
            # container.set_remove_callback(lambda: (self.lib.get_entry(item.id).fields.pop(index), self.update_widgets(item)))
            prompt = f'Are you sure you want to remove this "{self.lib.get_field_attr(field, "name")}" field?'
            callback = lambda: (self.remove_field(field), self.update_widgets())
            container.set_remove_callback(
                lambda: self.remove_message_box(prompt=prompt, callback=callback)
            )
        elif self.lib.get_field_attr(field, "type") == "datetime":
            # logging.info(f'WRITING DATETIME FOR ITEM {item.id}')
            if not mixed:
                try:
                    container.set_title(self.lib.get_field_attr(field, "name"))
                    # container.set_editable(False)
                    container.set_inline(False)
                    # TODO: Localize this and/or add preferences.
                    date = dt.strptime(
                        self.lib.get_field_attr(field, "content"), "%Y-%m-%d %H:%M:%S"
                    )
                    title = f"{self.lib.get_field_attr(field, 'name')} (Date)"
                    inner_container = TextWidget(title, date.strftime("%D - %r"))
                    container.set_inner_widget(inner_container)
                except:
                    container.set_title(self.lib.get_field_attr(field, "name"))
                    # container.set_editable(False)
                    container.set_inline(False)
                    title = f"{self.lib.get_field_attr(field, 'name')} (Date) (Unknown Format)"
                    inner_container = TextWidget(
                        title, str(self.lib.get_field_attr(field, "content"))
                    )
                # if type(item) == Entry:
                container.set_copy_callback(None)
                container.set_edit_callback(None)
                # container.set_remove_callback(lambda: (self.lib.get_entry(item.id).fields.pop(index), self.update_widgets(item)))
                prompt = f'Are you sure you want to remove this "{self.lib.get_field_attr(field, "name")}" field?'
                callback = lambda: (self.remove_field(field), self.update_widgets())
                container.set_remove_callback(
                    lambda: self.remove_message_box(prompt=prompt, callback=callback)
                )
            else:
                text = "<i>Mixed Data</i>"
                title = f"{self.lib.get_field_attr(field, 'name')} (Wacky Date)"
                inner_container = TextWidget(title, text)
                container.set_inner_widget(inner_container)
                container.set_copy_callback(None)
                container.set_edit_callback(None)
                container.set_remove_callback(None)
        else:
            # logging.info(f'[ENTRY PANEL] Unknown Type: {self.lib.get_field_attr(field, "type")}')
            container.set_title(self.lib.get_field_attr(field, "name"))
            # container.set_editable(False)
            container.set_inline(False)
            title = f"{self.lib.get_field_attr(field, 'name')} (Unknown Field Type)"
            inner_container = TextWidget(
                title, str(self.lib.get_field_attr(field, "content"))
            )
            container.set_inner_widget(inner_container)
            # if type(item) == Entry:
            container.set_copy_callback(None)
            container.set_edit_callback(None)
            # container.set_remove_callback(lambda: (self.lib.get_entry(item.id).fields.pop(index), self.update_widgets(item)))
            prompt = f'Are you sure you want to remove this "{self.lib.get_field_attr(field, "name")}" field?'
            callback = lambda: (self.remove_field(field), self.update_widgets())
            # callback = lambda: (self.lib.get_entry(item.id).fields.pop(index), self.update_widgets())
            container.set_remove_callback(
                lambda: self.remove_message_box(prompt=prompt, callback=callback)
            )
        container.edit_button.setHidden(True)
        container.setHidden(False)
        self.place_add_field_button()

    def remove_field(self, field: dict):
        """Removes a field from all selected Entries, given a field object."""
        for item_pair in self.selected:
            if item_pair[0] == ItemType.ENTRY:
                entry = self.lib.get_entry(item_pair[1])
                try:
                    index = entry.fields.index(field)
                    updated_badges = False
                    if 8 in entry.fields[index].keys() and (
                        1 in entry.fields[index][8] or 0 in entry.fields[index][8]
                    ):
                        updated_badges = True
                    # TODO: Create a proper Library/Entry method to manage fields.
                    entry.fields.pop(index)
                    if updated_badges:
                        self.driver.update_badges()
                except ValueError:
                    logging.info(
                        f"[PREVIEW PANEL][ERROR?] Tried to remove field from Entry ({entry.id}) that never had it"
                    )
                    pass

    def update_field(self, field: dict, content):
        """Removes a field from all selected Entries, given a field object."""
        field = dict(field)
        for item_pair in self.selected:
            if item_pair[0] == ItemType.ENTRY:
                entry = self.lib.get_entry(item_pair[1])
                try:
                    logging.info(field)
                    index = entry.fields.index(field)
                    self.lib.update_entry_field(entry.id, index, content, "replace")
                except ValueError:
                    logging.info(
                        f"[PREVIEW PANEL][ERROR] Tried to update field from Entry ({entry.id}) that never had it"
                    )
                    pass

    def remove_message_box(self, prompt: str, callback: typing.Callable) -> None:
        remove_mb = QMessageBox()
        remove_mb.setText(prompt)
        remove_mb.setWindowTitle("Remove Field")
        remove_mb.setIcon(QMessageBox.Icon.Warning)
        cancel_button = remove_mb.addButton(
            "&Cancel", QMessageBox.ButtonRole.DestructiveRole
        )
        remove_button = remove_mb.addButton(
            "&Remove", QMessageBox.ButtonRole.RejectRole
        )
        # remove_mb.setStandardButtons(QMessageBox.StandardButton.Cancel)
        remove_mb.setDefaultButton(cancel_button)
        result = remove_mb.exec_()
        # logging.info(result)
        if result == 1:
            callback()
