# -*- coding: utf-8 -*-

from copy import deepcopy
from tools import trace, timer

from PyQt5.QtWidgets import (
    QMessageBox, QUndoCommand, QUndoStack,
)

from Model.InitialConditions.InitialConditions import InitialConditions
from Model.InitialConditions.InitialConditionsDict import InitialConditionsDict

class SetCommand(QUndoCommand):
    def __init__(self, ics, row, column, new_value):
        QUndoCommand.__init__(self)

        self._ics = ics
        self._row = row
        self._column = column
        self._old = self._ics.get(self._row)[column]
        self._new = new_value

    def undo(self):
        self._ics.get(self._row)[self._column] = self._old

    def redo(self):
        self._ics.get(self._row)[self._column] = self._new

class AddCommand(QUndoCommand):
    def __init__(self, ics, index):
        QUndoCommand.__init__(self)

        self._ics = ics
        self._index = index
        self._new = None

    def undo(self):
        self._ics.delete_i([self._index])

    def redo(self):
        if self._new is None:
            self._new = self._ics.new(self._index)
        else:
            self._ics.insert(self._index, self._new)

class DelCommand(QUndoCommand):
    def __init__(self, ics, rows):
        QUndoCommand.__init__(self)

        self._ics = ics
        self._rows = rows

        self._ic = []
        for row in rows:
            self._ic.append((row, self._ics.get(row)))
        self._ic.sort()

    def undo(self):
        for row, el in self._ic:
            self._ics.insert(row, el)

    def redo(self):
        self._ics.delete_i(self._rows)

class SortCommand(QUndoCommand):
    def __init__(self, ics, _reverse):
        QUndoCommand.__init__(self)

        self._ics = ics
        self._reverse = _reverse

        self._old = self._ics.data
        self._indexes = None

    def undo(self):
        ll = self._ics.data
        self._ics.sort(
            key=lambda x: self._indexes[ll.index(x)]
        )

    def redo(self):
        self._ics.sort(
            reverse=self._reverse,
            key=lambda x: x.name
        )
        if self._indexes is None:
            self._indexes = list(
                map(
                    lambda p: self._old.index(p),
                    self._ics.data
                )
            )
            self._old = None


class MoveCommand(QUndoCommand):
    def __init__(self, ics, up, i):
        QUndoCommand.__init__(self)

        self._ics = ics
        self._up = up == "up"
        self._i = i

    def undo(self):
        if self._up:
            self._ics.move_up(self._i)
        else:
            self._ics.move_down(self._i)

    def redo(self):
        if self._up:
            self._ics.move_up(self._i)
        else:
            self._ics.move_down(self._i)


class PasteCommand(QUndoCommand):
    def __init__(self, ics, row, ic):
        QUndoCommand.__init__(self)

        self._ics = ics
        self._row = row
        self._ic = deepcopy(ic)
        self._ic.reverse()

    def undo(self):
        self._ics.delete(self._ic)

    def redo(self):
        for ic in self._ic:
            self._ics.insert(self._row, ic)


class DuplicateCommand(QUndoCommand):
    def __init__(self, ics, rows, ic):
        QUndoCommand.__init__(self)

        self._ics = ics
        self._rows = rows
        self._ic = deepcopy(ic)
        self._ic.reverse()

    def undo(self):
        self._ics.delete(self._ic)

    def redo(self):
        for ic in self._ics:
            self._ics.insert(self._rows[0], ic)