from datetime import datetime

import mariadb
from PySide6.QtCore import QAbstractTableModel, QModelIndex, Qt
from PySide6.QtGui import QColor


class ComicTableModel(QAbstractTableModel):

    def __init__(self, db_config, main_window):
        super().__init__()
        self.main_window = main_window
        self._data = []
        self.status_bar = main_window.statusBar
        self.mariadb_conn = mariadb.connect(
            host=db_config['mariadb']['host'],
            port=db_config['mariadb']['port'],
            user=db_config['mariadb']['user'],
            password=db_config['mariadb']['password'],
            database=db_config['mariadb']['database']
        )
        self.refresh()

    def refresh(self):
        data = []
        cursor = self.mariadb_conn.cursor()
        cursor.execute("SELECT id, created_date, last_modified_date, title, publisher_id  FROM comic")
        rows = cursor.fetchall()
        for row in rows:
            data.append(list(row))
        self.status_bar.showMessage(f"{len(rows)} Einträge geladen", 3000)
        self._data = data

    def rowCount(self, parent=QModelIndex()):
        # The length of the outer list.
        return len(self._data)

    def headerData(self, col, orientation, role=Qt.ItemDataRole.DisplayRole):
        if orientation == Qt.Orientation.Horizontal and role == Qt.ItemDataRole.DisplayRole:
            match col:
                case 0:
                    return "ID"
                case 1:
                    return "Created"
                case 2:
                    return "Updated"
                case 3:
                    return "Title"
                case 4:
                    return "Verlag"
        if orientation == Qt.Orientation.Vertical and role == Qt.ItemDataRole.DisplayRole:
            return str(col + 1)

    def data(self, index, role=Qt.ItemDataRole.DisplayRole):
        value = self._data[index.row()][index.column()]
        if role == Qt.ItemDataRole.DisplayRole:
            if isinstance(value, datetime):
                return value.strftime("%Y-%m-%d %M:%M:%S")
            if isinstance(value, str):
                return value
            if isinstance(value, bytes):
                if value == b'\x01':
                    return "True"
                return "False"
            return value
        if role == Qt.ItemDataRole.DecorationRole:
            if isinstance(value, bytes):
                # print('{}: {}'.format(value, type(value)))
                if value == b'\x01':
                    return self.main_window.tick
                else:
                    return self.main_window.cross


    def columnCount(self, index=QModelIndex()):
        # The following takes the first sub-list, and returns
        # the length (only works if all rows are an equal length)
        return len(self._data[0])

    def setData(self, index, value, role=Qt.ItemDataRole.EditRole):
        if role == Qt.ItemDataRole.EditRole:
            self._data[index.row()][index.column()] = value
        if role == Qt.ItemDataRole.CheckStateRole:
            checked = value == Qt.CheckState.Checked
            self._data[index.row()][index.column()] = checked
        return True

    def flags(self, index):
        return Qt.ItemFlag.ItemIsSelectable | Qt.ItemFlag.ItemIsEnabled | Qt.ItemFlag.ItemIsEditable | Qt.ItemFlag.ItemIsUserTristate