# -*- coding: utf-8 -*-
# This file is part of the cashbook-module from m-ds for Tryton.
# The COPYRIGHT file at the top level of this repository contains the
# full copyright notices and license terms.

from trytond.model import MultiValueMixin, ValueMixin, fields, Unique
from trytond.transaction import Transaction
from trytond.pool import Pool
from sql import With, Literal
from sql.functions import Function


class ArrayAgg(Function):
    """input values, including nulls, concatenated into an array.
    """
    __slots__ = ()
    _function = 'ARRAY_AGG'

# end ArrayAgg

class ArrayAppend(Function):
    """ sql: array_append
    """
    __slots__ = ()
    _function = 'ARRAY_APPEND'

# end ArrayApppend


class ArrayToString(Function):
    """ sql: array_to_string
    """
    __slots__ = ()
    _function = 'ARRAY_TO_STRING'

# end ArrayToString


class AnyInArray(Function):
    """ sql: array_to_string
    """
    __slots__ = ()
    _function = 'ANY'

    def __str__(self):
        return self._function + '(' + ', '.join(
            map(self._format, self.args)) + '::int[])'

# end AnyInArray


class Array(Function):
    """ sql: array-type
    """
    __slots__ = ()
    _function = 'ARRAY'

    def __str__(self):
        return self._function + '[' + ', '.join(
            map(self._format, self.args)) + ']'

# end Array


def sub_ids_hierarchical(model_name):
    """ get table with id and sub-ids
    """
    Model2 = Pool().get(model_name)
    tab_mod = Model2.__table__()
    tab_mod2 = Model2.__table__()

    lines = With('parent', 'id', recursive=True)
    lines.query = tab_mod.select(
            tab_mod.id, tab_mod.id,
        ) | tab_mod2.join(lines,
            condition=lines.id==tab_mod2.parent,
        ).select(
            lines.parent, tab_mod2.id,
        )
    lines.query.all_ = True

    query = lines.select(
            lines.parent,
            ArrayAgg(lines.id).as_('subids'),
            group_by=[lines.parent],
            with_ = [lines])
    return query


def order_name_hierarchical(model_name, tables):
    """ order by pos
        a recursive sorting
    """
    Model2 = Pool().get(model_name)
    tab_mod = Model2.__table__()
    tab_mod2 = Model2.__table__()
    table, _ = tables[None]

    lines = With('id', 'name', 'name_path', recursive=True)
    lines.query = tab_mod.select(
            tab_mod.id, tab_mod.name, Array(tab_mod.name),
            where = tab_mod.parent==None,
        )
    lines.query |= tab_mod2.join(lines,
            condition=lines.id==tab_mod2.parent,
        ).select(
            tab_mod2.id, tab_mod2.name, ArrayAppend(lines.name_path, tab_mod2.name),
        )
    lines.query.all_ = True

    query = lines.select(
            ArrayToString(lines.name_path, '/').as_('rec_name'),
            where = table.id==lines.id,
            with_ = [lines])
    return [query]


class UserValueMixin(ValueMixin):
    iduser = fields.Many2One(model_name='res.user', string="User",
        select=True, ondelete='CASCADE', required=True)

    @classmethod
    def __setup__(cls):
        super(UserValueMixin, cls).__setup__()
        tab_val = cls.__table__()
        cls._sql_constraints.extend([
            ('val_uniq',
                Unique(tab_val, tab_val.iduser),
                'cashbook.msg_setting_already_exists'),
            ])

# end UserValueMixin


class UserMultiValueMixin(MultiValueMixin):

    def updt_multivalue_pattern(self, pattern):
        """ add values to pattern
        """
        pattern.setdefault('iduser', Transaction().user)
        return pattern

    def get_multivalue(self, name, **pattern):
        Value = self.multivalue_model(name)
        if issubclass(Value, UserValueMixin):
            pattern = self.updt_multivalue_pattern(pattern)
        return super(UserMultiValueMixin, self).get_multivalue(name, **pattern)

    def set_multivalue(self, name, value, **pattern):
        Value = self.multivalue_model(name)
        if issubclass(Value, UserValueMixin):
            pattern = self.updt_multivalue_pattern(pattern)
        return super(UserMultiValueMixin, self).set_multivalue(name, value, **pattern)

# end UserMultiValueMixin