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

#
# Please note that these reports are not multi-currency !!!
#

from odoo import api, fields, models, tools


class PurchaseReport(models.Model):
    _name = "purchase.report"
    _description = "Purchase Report"
    _auto = False
    _order = 'date_order desc, price_total desc'

    date_order = fields.Datetime('Order Date', readonly=True, help="Date on which this document has been created")
    state = fields.Selection([
        ('draft', 'Draft RFQ'),
        ('sent', 'RFQ Sent'),
        ('to approve', 'To Approve'),
        ('purchase', 'Purchase Order'),
        ('done', 'Done'),
        ('cancel', 'Cancelled')
    ], 'Order Status', readonly=True)
    product_id = fields.Many2one('product.product', 'Product', readonly=True)
    partner_id = fields.Many2one('res.partner', 'Vendor', readonly=True)
    date_approve = fields.Datetime('Confirmation Date', readonly=True)
    product_uom = fields.Many2one('uom.uom', 'Reference Unit of Measure', required=True)
    company_id = fields.Many2one('res.company', 'Company', readonly=True)
    currency_id = fields.Many2one('res.currency', 'Currency', readonly=True)
    user_id = fields.Many2one('res.users', 'Purchase Representative', readonly=True)
    delay = fields.Float('Days to Confirm', digits=(16, 2), readonly=True)
    delay_pass = fields.Float('Days to Receive', digits=(16, 2), readonly=True)
    price_total = fields.Float('Total', readonly=True)
    price_average = fields.Float('Average Cost', readonly=True, group_operator="avg")
    nbr_lines = fields.Integer('# of Lines', readonly=True)
    category_id = fields.Many2one('product.category', 'Product Category', readonly=True)
    product_tmpl_id = fields.Many2one('product.template', 'Product Template', readonly=True)
    country_id = fields.Many2one('res.country', 'Partner Country', readonly=True)
    fiscal_position_id = fields.Many2one('account.fiscal.position', string='Fiscal Position', readonly=True)
    account_analytic_id = fields.Many2one('account.analytic.account', 'Analytic Account', readonly=True)
    commercial_partner_id = fields.Many2one('res.partner', 'Commercial Entity', readonly=True)
    weight = fields.Float('Gross Weight', readonly=True)
    volume = fields.Float('Volume', readonly=True)
    order_id = fields.Many2one('purchase.order', 'Order', readonly=True)
    untaxed_total = fields.Float('Untaxed Total', readonly=True)
    qty_ordered = fields.Float('Qty Ordered', readonly=True)
    qty_received = fields.Float('Qty Received', readonly=True)
    qty_billed = fields.Float('Qty Billed', readonly=True)
    qty_to_be_billed = fields.Float('Qty to be Billed', readonly=True)

    def init(self):
        # self._table = sale_report
        tools.drop_view_if_exists(self.env.cr, self._table)
        self.env.cr.execute("""CREATE or REPLACE VIEW %s as (
            %s
            FROM ( %s )
            %s
            )""" % (self._table, self._select(), self._from(), self._group_by()))

    def _select(self):
        select_str = """
            WITH currency_rate as (%s)
                SELECT
                    po.id as order_id,
                    min(l.id) as id,
                    po.date_order as date_order,
                    po.state,
                    po.date_approve,
                    po.dest_address_id,
                    po.partner_id as partner_id,
                    po.user_id as user_id,
                    po.company_id as company_id,
                    po.fiscal_position_id as fiscal_position_id,
                    l.product_id,
                    p.product_tmpl_id,
                    t.categ_id as category_id,
                    po.currency_id,
                    t.uom_id as product_uom,
                    extract(epoch from age(po.date_approve,po.date_order))/(24*60*60)::decimal(16,2) as delay,
                    extract(epoch from age(l.date_planned,po.date_order))/(24*60*60)::decimal(16,2) as delay_pass,
                    count(*) as nbr_lines,
                    sum(l.price_total / COALESCE(po.currency_rate, 1.0))::decimal(16,2) as price_total,
                    (sum(l.product_qty * l.price_unit / COALESCE(po.currency_rate, 1.0))/NULLIF(sum(l.product_qty/line_uom.factor*product_uom.factor),0.0))::decimal(16,2) as price_average,
                    partner.country_id as country_id,
                    partner.commercial_partner_id as commercial_partner_id,
                    analytic_account.id as account_analytic_id,
                    sum(p.weight * l.product_qty/line_uom.factor*product_uom.factor) as weight,
                    sum(p.volume * l.product_qty/line_uom.factor*product_uom.factor) as volume,
                    sum(l.price_subtotal / COALESCE(po.currency_rate, 1.0))::decimal(16,2) as untaxed_total,
                    sum(l.product_qty / line_uom.factor * product_uom.factor) as qty_ordered,
                    sum(l.qty_received / line_uom.factor * product_uom.factor) as qty_received,
                    sum(l.qty_invoiced / line_uom.factor * product_uom.factor) as qty_billed,
                    case when t.purchase_method = 'purchase' 
                         then sum(l.product_qty / line_uom.factor * product_uom.factor) - sum(l.qty_invoiced / line_uom.factor * product_uom.factor)
                         else sum(l.qty_received / line_uom.factor * product_uom.factor) - sum(l.qty_invoiced / line_uom.factor * product_uom.factor)
                    end as qty_to_be_billed
        """ % self.env['res.currency']._select_companies_rates()
        return select_str

    def _from(self):
        from_str = """
            purchase_order_line l
                join purchase_order po on (l.order_id=po.id)
                join res_partner partner on po.partner_id = partner.id
                    left join product_product p on (l.product_id=p.id)
                        left join product_template t on (p.product_tmpl_id=t.id)
                left join uom_uom line_uom on (line_uom.id=l.product_uom)
                left join uom_uom product_uom on (product_uom.id=t.uom_id)
                left join account_analytic_account analytic_account on (l.account_analytic_id = analytic_account.id)
                left join currency_rate cr on (cr.currency_id = po.currency_id and
                    cr.company_id = po.company_id and
                    cr.date_start <= coalesce(po.date_order, now()) and
                    (cr.date_end is null or cr.date_end > coalesce(po.date_order, now())))
        """
        return from_str

    def _group_by(self):
        group_by_str = """
            GROUP BY
                po.company_id,
                po.user_id,
                po.partner_id,
                line_uom.factor,
                po.currency_id,
                l.price_unit,
                po.date_approve,
                l.date_planned,
                l.product_uom,
                po.dest_address_id,
                po.fiscal_position_id,
                l.product_id,
                p.product_tmpl_id,
                t.categ_id,
                po.date_order,
                po.state,
                line_uom.uom_type,
                line_uom.category_id,
                t.uom_id,
                t.purchase_method,
                line_uom.id,
                product_uom.factor,
                partner.country_id,
                partner.commercial_partner_id,
                analytic_account.id,
                po.id
        """
        return group_by_str
