# -*- coding: utf-8 -*-
# Part of Odoo. See LICENSE file for full copyright and licensing details.

from collections import defaultdict

from odoo import api, fields, models, _
from odoo.osv import expression


class AccountMove(models.Model):
    _inherit = "account.move"

    timesheet_ids = fields.One2many('account.analytic.line', 'timesheet_invoice_id', string='Timesheets', readonly=True, copy=False)
    timesheet_count = fields.Integer("Number of timesheets", compute='_compute_timesheet_count', compute_sudo=True)
    timesheet_encode_uom_id = fields.Many2one('uom.uom', related='company_id.timesheet_encode_uom_id')
    timesheet_total_duration = fields.Integer("Timesheet Total Duration",
        compute='_compute_timesheet_total_duration', compute_sudo=True,
        help="Total recorded duration, expressed in the encoding UoM, and rounded to the unit")

    @api.depends('timesheet_ids', 'company_id.timesheet_encode_uom_id')
    def _compute_timesheet_total_duration(self):
        if not self.user_has_groups('hr_timesheet.group_hr_timesheet_user'):
            self.timesheet_total_duration = 0
            return
        group_data = self.env['account.analytic.line']._read_group([
            ('timesheet_invoice_id', 'in', self.ids)
        ], ['timesheet_invoice_id'], ['unit_amount:sum'])
        timesheet_unit_amount_dict = defaultdict(float)
        timesheet_unit_amount_dict.update({timesheet_invoice.id: amount for timesheet_invoice, amount in group_data})
        for invoice in self:
            total_time = invoice.company_id.project_time_mode_id._compute_quantity(timesheet_unit_amount_dict[invoice.id], invoice.timesheet_encode_uom_id)
            invoice.timesheet_total_duration = round(total_time)

    @api.depends('timesheet_ids')
    def _compute_timesheet_count(self):
        timesheet_data = self.env['account.analytic.line']._read_group([('timesheet_invoice_id', 'in', self.ids)], ['timesheet_invoice_id'], ['__count'])
        mapped_data = {timesheet_invoice.id: count for timesheet_invoice, count in timesheet_data}
        for invoice in self:
            invoice.timesheet_count = mapped_data.get(invoice.id, 0)

    def action_view_timesheet(self):
        self.ensure_one()
        return {
            'type': 'ir.actions.act_window',
            'name': _('Timesheets'),
            'domain': [('project_id', '!=', False)],
            'res_model': 'account.analytic.line',
            'view_id': False,
            'view_mode': 'tree,form',
            'help': _("""
                <p class="o_view_nocontent_smiling_face">
                    Record timesheets
                </p><p>
                    You can register and track your workings hours by project every
                    day. Every time spent on a project will become a cost and can be re-invoiced to
                    customers if required.
                </p>
            """),
            'limit': 80,
            'context': {
                'default_project_id': self.id,
                'search_default_project_id': [self.id]
            }
        }

    def _link_timesheets_to_invoice(self, start_date=None, end_date=None):
        """ Search timesheets from given period and link this timesheets to the invoice

            When we create an invoice from a sale order, we need to
            link the timesheets in this sale order to the invoice.
            Then, we can know which timesheets are invoiced in the sale order.
            :param start_date: the start date of the period
            :param end_date: the end date of the period
        """
        for line in self.filtered(lambda i: i.move_type == 'out_invoice' and i.state == 'draft').invoice_line_ids:
            sale_line_delivery = line.sale_line_ids.filtered(lambda sol: sol.product_id.invoice_policy == 'delivery' and sol.product_id.service_type == 'timesheet')
            if sale_line_delivery:
                domain = line._timesheet_domain_get_invoiced_lines(sale_line_delivery)
                if start_date:
                    domain = expression.AND([domain, [('date', '>=', start_date)]])
                if end_date:
                    domain = expression.AND([domain, [('date', '<=', end_date)]])
                timesheets = self.env['account.analytic.line'].sudo().search(domain)
                timesheets.write({'timesheet_invoice_id': line.move_id.id})


class AccountMoveLine(models.Model):
    _inherit = 'account.move.line'

    @api.model
    def _timesheet_domain_get_invoiced_lines(self, sale_line_delivery):
        """ Get the domain for the timesheet to link to the created invoice
            :param sale_line_delivery: recordset of sale.order.line to invoice
            :return a normalized domain
        """
        return [
            ('so_line', 'in', sale_line_delivery.ids),
            ('project_id', '!=', False),
            '|', '|',
                ('timesheet_invoice_id', '=', False),
                ('timesheet_invoice_id.state', '=', 'cancel'),
                ('timesheet_invoice_id.payment_state', '=', 'reversed')
        ]

    def unlink(self):
        move_line_read_group = self.env['account.move.line'].search_read([
            ('move_id.move_type', '=', 'out_invoice'),
            ('move_id.state', '=', 'draft'),
            ('sale_line_ids.product_id.invoice_policy', '=', 'delivery'),
            ('sale_line_ids.product_id.service_type', '=', 'timesheet'),
            ('id', 'in', self.ids)],
            ['move_id', 'sale_line_ids'])

        sale_line_ids_per_move = defaultdict(lambda: self.env['sale.order.line'])
        for move_line in move_line_read_group:
            sale_line_ids_per_move[move_line['move_id'][0]] += self.env['sale.order.line'].browse(move_line['sale_line_ids'])

        timesheet_read_group = self.sudo().env['account.analytic.line']._read_group([
            ('timesheet_invoice_id.move_type', '=', 'out_invoice'),
            ('timesheet_invoice_id.state', '=', 'draft'),
            ('timesheet_invoice_id', 'in', self.move_id.ids)],
            ['timesheet_invoice_id', 'so_line'],
            ['id:array_agg'])

        timesheet_ids = []
        for timesheet_invoice, so_line, ids in timesheet_read_group:
            if so_line.id in sale_line_ids_per_move[timesheet_invoice.id].ids:
                timesheet_ids += ids

        self.sudo().env['account.analytic.line'].browse(timesheet_ids).write({'timesheet_invoice_id': False})
        return super().unlink()