from odoo import api, fields, models, _
from odoo.addons import decimal_precision as dp
from odoo.exceptions import UserError, ValidationError


class StockMove(models.Model):
    _inherit = 'stock.move'

    maintenance_request_id = fields.Many2one('maintenance.request')


class MaintenanceTeam(models.Model):
    _inherit = 'maintenance.team'

    repair_location_id = fields.Many2one('stock.location', string='Default Repair Parts Source')
    repair_location_dest_id = fields.Many2one('stock.location', string='Default Repair Parts Destination')


class MaintenanceRequest(models.Model):
    _inherit = 'maintenance.request'

    maintenance_type = fields.Selection(selection_add=[('negligence', 'Negligence')])
    repair_line_ids = fields.One2many('maintenance.request.repair.line', 'request_id', 'Parts', copy=True)
    repair_status = fields.Selection([
        ('repaired', 'Repaired'),
        ('to repair', 'To Repair'),
        ('no', 'Nothing to Repair')
        ], string='Repair Status', compute='_get_repaired', store=True, readonly=True)
    repair_location_id = fields.Many2one('stock.location', string='Source Location')
    repair_location_dest_id = fields.Many2one('stock.location', string='Destination Location')
    total_lst_price = fields.Float(string='Total Price', compute='_compute_repair_totals', stored=True)
    total_standard_price = fields.Float(string='Total Est. Cost', compute='_compute_repair_totals', stored=True)
    total_cost = fields.Float(string='Total Cost', compute='_compute_repair_totals', stored=True)

    @api.depends('repair_line_ids.lst_price', 'repair_line_ids.standard_price', 'repair_line_ids.cost')
    def _compute_repair_totals(self):
        for repair in self:
            repair.total_lst_price = sum(l.lst_price for l in repair.repair_line_ids)
            repair.total_standard_price = sum(l.standard_price for l in repair.repair_line_ids)
            repair.total_cost = sum(l.cost for l in repair.repair_line_ids)

    @api.depends('repair_line_ids.state')
    def _get_repaired(self):
        for request in self:
            if not request.repair_line_ids:
                request.repair_status = 'no'
            elif request.repair_line_ids.filtered(lambda l: l.state != 'done'):
                request.repair_status = 'to repair'
            else:
                request.repair_status = 'repaired'

    @api.onchange('maintenance_team_id')
    def _onchange_maintenance_team(self):
        for request in self:
            if request.maintenance_team_id:
                request.repair_location_id = request.maintenance_team_id.repair_location_id
                request.repair_location_dest_id = request.maintenance_team_id.repair_location_dest_id


    def action_complete_repair(self):
        for request in self.filtered(lambda r: r.repair_status == 'to repair'):
            request.repair_line_ids.action_complete()
        return True


class MaintenanceRequestRepairLine(models.Model):
    _name = 'maintenance.request.repair.line'

    request_id = fields.Many2one('maintenance.request', copy=False)
    product_id = fields.Many2one('product.product', 'Product', required=True,
                                 states={'done': [('readonly', True)]})
    product_uom_qty = fields.Float('Quantity', default=1.0,
                                   digits=dp.get_precision('Product Unit of Measure'), required=True,
                                   states={'done': [('readonly', True)]})
    product_uom_id = fields.Many2one('product.uom', 'Product Unit of Measure', required=True,
                                     states={'done': [('readonly', True)]})
    state = fields.Selection([
        ('draft', 'Draft'),
        ('done', 'Done'),
    ], string='State', copy=False, default='draft')
    move_id = fields.Many2one('stock.move', string='Stock Move')
    lst_price = fields.Float(string='Sale Price', states={'done': [('readonly', True)]})
    standard_price = fields.Float(string='Est. Cost', states={'done': [('readonly', True)]})
    cost = fields.Float(string='Cost', compute='_compute_actual_cost', stored=True)
    
    @api.multi
    def unlink(self):
        if self.filtered(lambda l: l.state == 'done'):
            raise UserError(_('Only draft lines can be deleted.'))
        return super(MaintenanceRequestRepairLine, self).unlink()

    @api.onchange('product_id', 'product_uom_qty')
    def onchange_product_id(self):
        if self.product_id:
            self.product_uom_id = self.product_id.uom_id
            self.lst_price = self.product_id.lst_price * self.product_uom_qty
            self.standard_price = self.product_id.standard_price * self.product_uom_qty

    @api.depends('product_id', 'move_id')
    def _compute_actual_cost(self):
        for line in self:
            if line.move_id:
                line.cost = sum(abs(m.amount) for m in line.move_id.account_move_ids)
            else:
                line.cost = 0.0

    @api.multi
    def action_complete(self):
        # Create stock movements. - Inspired by mrp_repair
        MoveObj = self.env['stock.move']
        for line in self.filtered(lambda l: not l.state == 'done'):
            request = line.request_id

            # Optional hooks to `maintenance_timesheet` and `stock_analytic`
            analytic_account_id = False
            if getattr(request, 'project_id', False):
                analytic_account_id = request.project_id.analytic_account_id.id

            move = MoveObj.create({
                'name': request.name,
                'product_id': line.product_id.id,
                'product_uom_qty': line.product_uom_qty,
                'product_uom': line.product_uom_id.id,
                'location_id': request.repair_location_id.id,
                'location_dest_id': request.repair_location_dest_id.id,
                'maintenance_request_id': request.id,
                'origin': request.name,
                'analytic_account_id': analytic_account_id,
            })
            move = move.sudo()
            move._action_confirm()
            move._action_assign()
            if move.state != 'assigned':
                raise ValidationError(_('Unable to reserve inventory.'))

            move.quantity_done = line.product_uom_qty
            move._action_done()
            if move.state != 'done':
                raise ValidationError(_('Unable to move inventory.'))

            line.write({'move_id': move.id, 'state': 'done'})
        return True