#  NanoVNASaver
#
#  A python program to view and export Touchstone data from a NanoVNA
#  Copyright (C) 2019, 2020  Rune B. Broberg
#  Copyright (C) 2020 NanoVNA-Saver Authors
#
#  This program is free software: you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation, either version 3 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program.  If not, see <https://www.gnu.org/licenses/>.
import logging
import re
import typing
from typing import List, Tuple

from PyQt5 import QtCore, QtGui
from PyQt5.QtCore import QModelIndex

logger = logging.getLogger(__name__)


class BandsModel(QtCore.QAbstractTableModel):
    bands: List[Tuple[str, int, int]] = []
    enabled = False
    color = QtGui.QColor(128, 128, 128, 48)

    # These bands correspond broadly to the Danish Amateur Radio allocation
    default_bands = ["2200 m;135700;137800",
                     "630 m;472000;479000",
                     "160 m;1800000;2000000",
                     "80 m;3500000;3800000",
                     "60 m;5250000;5450000",
                     "40 m;7000000;7200000",
                     "30 m;10100000;10150000",
                     "20 m;14000000;14350000",
                     "17 m;18068000;18168000",
                     "15 m;21000000;21450000",
                     "12 m;24890000;24990000",
                     "10 m;28000000;29700000",
                     "6 m;50000000;52000000",
                     "4 m;69887500;70512500",
                     "2 m;144000000;146000000",
                     "70 cm;432000000;438000000",
                     "23 cm;1240000000;1300000000",
                     "13 cm;2320000000;2450000000"]

    def __init__(self):
        super().__init__()
        self.settings = QtCore.QSettings(QtCore.QSettings.IniFormat,
                                         QtCore.QSettings.UserScope,
                                         "NanoVNASaver", "Bands")
        self.settings.setIniCodec("UTF-8")
        self.enabled = self.settings.value("ShowBands", False, bool)

        stored_bands: List[str] = self.settings.value("bands", self.default_bands)
        if stored_bands:
            for b in stored_bands:
                (name, start, end) = b.split(";")
                self.bands.append((name, int(start), int(end)))

    def saveSettings(self):
        stored_bands = []
        for b in self.bands:
            stored_bands.append(b[0] + ";" + str(b[1]) + ";" + str(b[2]))
        self.settings.setValue("bands", stored_bands)
        self.settings.sync()

    def resetBands(self):
        self.bands = []
        for b in self.default_bands:
            (name, start, end) = b.split(";")
            self.bands.append((name, int(start), int(end)))
        self.layoutChanged.emit()
        self.saveSettings()

    def columnCount(self, parent: QModelIndex = ...) -> int:
        return 3

    def rowCount(self, parent: QModelIndex = ...) -> int:
        return len(self.bands)

    def data(self, index: QModelIndex, role: int = ...) -> QtCore.QVariant:
        if (role == QtCore.Qt.DisplayRole or
                role == QtCore.Qt.ItemDataRole or role == QtCore.Qt.EditRole):
            return QtCore.QVariant(self.bands[index.row()][index.column()])
        if role == QtCore.Qt.TextAlignmentRole:
            if index.column() == 0:
                return QtCore.QVariant(QtCore.Qt.AlignCenter)
            return QtCore.QVariant(QtCore.Qt.AlignRight | QtCore.Qt.AlignVCenter)
        return QtCore.QVariant()

    def setData(self, index: QModelIndex, value: typing.Any, role: int = ...) -> bool:
        if role == QtCore.Qt.EditRole and index.isValid():
            t = self.bands[index.row()]
            name = t[0]
            start = t[1]
            end = t[2]
            if index.column() == 0:
                name = value
            elif index.column() == 1:
                start = value
            elif index.column() == 2:
                end = value
            self.bands[index.row()] = (name, start, end)
            self.dataChanged.emit(index, index)
            self.saveSettings()
            return True
        return False

    def index(self, row: int, column: int, parent: QModelIndex = ...) -> QModelIndex:
        return self.createIndex(row, column)

    def addRow(self):
        self.bands.append(("New", 0, 0))
        self.dataChanged.emit(self.index(len(self.bands), 0), self.index(len(self.bands), 2))
        self.layoutChanged.emit()

    def removeRow(self, row: int, parent: QModelIndex = ...) -> bool:
        self.bands.remove(self.bands[row])
        self.layoutChanged.emit()
        self.saveSettings()
        return True

    def headerData(self, section: int,
                   orientation: QtCore.Qt.Orientation, role: int = ...):
        if (role == QtCore.Qt.DisplayRole and
                orientation == QtCore.Qt.Horizontal):
            if section == 0:
                return "Band"
            if section == 1:
                return "Start (Hz)"
            if section == 2:
                return "End (Hz)"
            return "Invalid"
        super().headerData(section, orientation, role)

    def flags(self, index: QModelIndex) -> QtCore.Qt.ItemFlags:
        if index.isValid():
            return QtCore.Qt.ItemFlags(
                QtCore.Qt.ItemIsEditable |
                QtCore.Qt.ItemIsEnabled |
                QtCore.Qt.ItemIsSelectable)
        super().flags(index)

    def setColor(self, color):
        self.color = color


class Version:
    RXP = re.compile(r"""^
        \D*
        (?P<major>\d+)\.
        (?P<minor>\d+)\.
        (?P<revision>\d+)
        (?P<note>.*)
        $""", re.VERBOSE)

    def __init__(self, vstring: str = "0.0.0"):
        self.data = {
            "major": 0,
            "minor": 0,
            "revision": 0,
            "note": "",
        }
        try:
            self.data = Version.RXP.search(vstring).groupdict()
            for name in ("major", "minor", "revision"):
                self.data[name] = int(self.data[name])
        except AttributeError:
            logger.error("Unable to parse version: %s", vstring)

    def __gt__(self, other: "Version") -> bool:
        l, r = self.data, other.data
        for name in ("major", "minor", "revision"):
            if l[name] > r[name]:
                return True
            if l[name] < r[name]:
                return False
        return False

    def __lt__(self, other: "Version") -> bool:
        return other < self

    def __ge__(self, other: "Version") -> bool:
        return self > other or self == other

    def __le__(self, other: "Version") -> bool:
        return self < other or self == other

    def __eq__(self, other: "Version") -> bool:
        return self.data == other.data

    def __str__(self) -> str:
        return (f'{self.data["major"]}.{self.data["minor"]}'
                f'.{self.data["revision"]}{self.data["note"]}')

    @property
    def major(self) -> int:
        return self.data["major"]

    @property
    def minor(self) -> int:
        return self.data["minor"]

    @property
    def revision(self) -> int:
        return self.data["revision"]

    @property
    def note(self) -> str:
        return self.data["note"]