# This file is part of Tryton.  The COPYRIGHT file at the top level of
# this repository contains the full copyright notices and license terms.

import datetime as dt
from string import Template

from trytond.model import ModelSQL, ModelView, fields
from trytond.pool import Pool
from trytond.pyson import Eval, If
from trytond.report import Report
from trytond.tools import timezone as tz
from trytond.transaction import Transaction
from trytond.wizard import Button, StateTransition, StateView, Wizard

TIMEZONES = [(z, z) for z in tz.available_timezones()]
TIMEZONES += [(None, '')]

Transaction.cache_keys.update({'company', 'employee'})

_SUBSTITUTION_HELP = (
    "The following placeholders can be used:\n"
    "- ${name}\n"
    "- ${phone}\n"
    "- ${mobile}\n"
    "- ${fax}\n"
    "- ${email}\n"
    "- ${website}\n"
    "- ${address}\n"
    "- ${tax_identifier}\n"
    )


class Company(ModelSQL, ModelView):
    'Company'
    __name__ = 'company.company'
    party = fields.Many2One('party.party', 'Party', required=True,
            ondelete='CASCADE')
    header = fields.Text(
        'Header',
        help="The text to display on report headers.\n" + _SUBSTITUTION_HELP)
    footer = fields.Text(
        'Footer',
        help="The text to display on report footers.\n" + _SUBSTITUTION_HELP)
    currency = fields.Many2One('currency.currency', 'Currency', required=True,
        help="The main currency for the company.")
    timezone = fields.Selection(TIMEZONES, 'Timezone', translate=False,
        help="Used to compute the today date.")
    employees = fields.One2Many('company.employee', 'company', 'Employees',
        help="Add employees to the company.")
    
    logo = fields.Binary("Logo")

    @property
    def header_used(self):
        return Template(self.header or '').safe_substitute(self._substitutions)

    @property
    def footer_used(self):
        return Template(self.footer or '').safe_substitute(self._substitutions)

    @property
    def _substitutions(self):
        address = self.party.address_get()
        tax_identifier = self.party.tax_identifier
        return {
            'name': self.party.name,
            'phone': self.party.phone,
            'mobile': self.party.mobile,
            'fax': self.party.fax,
            'email': self.party.email,
            'website': self.party.website,
            'address': (
                ' '.join(address.full_address.splitlines())
                if address else ''),
            'tax_identifier': tax_identifier.code if tax_identifier else '',
            }

    def get_rec_name(self, name):
        return self.party.rec_name

    @classmethod
    def search_rec_name(cls, name, clause):
        return [('party.rec_name',) + tuple(clause[1:])]

    @classmethod
    def write(cls, companies, values, *args):
        super(Company, cls).write(companies, values, *args)
        # Restart the cache on the domain_get method
        Pool().get('ir.rule')._domain_get_cache.clear()


class Employee(ModelSQL, ModelView):
    'Employee'
    __name__ = 'company.employee'
    party = fields.Many2One('party.party', 'Party', required=True,
        context={
            'company': If(
                Eval('company', -1) >= 0, Eval('company', None), None),
            },
        depends={'company'},
        help="The party which represents the employee.")
    company = fields.Many2One('company.company', 'Company', required=True,
        help="The company to which the employee belongs.")
    active = fields.Function(
        fields.Boolean("Active"),
        'on_change_with_active', searcher='search_active')
    start_date = fields.Date('Start Date',
        domain=[If((Eval('start_date')) & (Eval('end_date')),
                ('start_date', '<=', Eval('end_date')),
                (),
                )
            ],
        help="When the employee joins the company.")
    end_date = fields.Date('End Date',
        domain=[If((Eval('start_date')) & (Eval('end_date')),
                ('end_date', '>=', Eval('start_date')),
                (),
                )
            ],
        help="When the employee leaves the company.")
    supervisor = fields.Many2One(
        'company.employee', "Supervisor",
        domain=[
            ('company', '=', Eval('company', -1)),
            ],
        help="The employee who oversees this employee.")
    subordinates = fields.One2Many(
        'company.employee', 'supervisor', "Subordinates",
        domain=[
            ('company', '=', Eval('company', -1)),
            ],
        help="The employees to be overseen by this employee.")

    @staticmethod
    def default_company():
        return Transaction().context.get('company')

    @fields.depends('start_date', 'end_date')
    def on_change_with_active(self, name=None):
        pool = Pool()
        Date = pool.get('ir.date')
        context = Transaction().context
        date = context.get('date') or Date.today()
        start_date = self.start_date or dt.date.min
        end_date = self.end_date or dt.date.max
        return start_date <= date <= end_date

    @classmethod
    def search_active(cls, name, domain):
        pool = Pool()
        Date = pool.get('ir.date')
        context = Transaction().context
        date = context.get('date') or Date.today()
        _, operator, value = domain
        if (operator == '=' and value) or (operator == '!=' and not value):
            domain = [
                ['OR',
                    ('start_date', '=', None),
                    ('start_date', '<=', date),
                    ],
                ['OR',
                    ('end_date', '=', None),
                    ('end_date', '>=', date),
                    ],
                ]
        elif (operator == '=' and not value) or (operator == '!=' and value):
            domain = ['OR',
                ('start_date', '>', date),
                ('end_date', '<', date),
                ]
        else:
            domain = []
        return domain

    def get_rec_name(self, name):
        return self.party.rec_name

    @classmethod
    def search_rec_name(cls, name, clause):
        return [('party.rec_name',) + tuple(clause[1:])]


class CompanyConfigStart(ModelView):
    'Company Config'
    __name__ = 'company.company.config.start'


class CompanyConfig(Wizard):
    'Configure Company'
    __name__ = 'company.company.config'
    start = StateView('company.company.config.start',
        'company.company_config_start_view_form', [
            Button('Cancel', 'end', 'tryton-cancel'),
            Button('OK', 'company', 'tryton-ok', True),
            ])
    company = StateView('company.company',
        'company.company_view_form', [
            Button('Cancel', 'end', 'tryton-cancel'),
            Button('Add', 'add', 'tryton-ok', True),
            ])
    add = StateTransition()

    def transition_add(self):
        User = Pool().get('res.user')

        self.company.save()
        users = User.search([
                ('companies', '=', None),
                ])
        User.write(users, {
                'companies': [('add', [self.company.id])],
                'company': self.company.id,
                })
        return 'end'

    def end(self):
        return 'reload context'


class CompanyReport(Report):

    @classmethod
    def header_key(cls, record):
        return super().header_key(record) + (('company', record.company),)

    @classmethod
    def get_context(cls, records, header, data):
        context = super().get_context(records, header, data)
        context['company'] = header.get('company')
        return context