"""Asset disposal wizard (sale, scrap, donation, lost)."""

from odoo import _, api, fields, models
from odoo.exceptions import UserError


class FusionDisposalWizard(models.TransientModel):
    _name = "fusion.disposal.wizard"
    _description = "Asset Disposal Wizard"

    asset_id = fields.Many2one(
        'fusion.asset', required=True,
        default=lambda self: self._default_asset(),
    )
    company_id = fields.Many2one(related='asset_id.company_id')
    currency_id = fields.Many2one(related='asset_id.currency_id')
    book_value = fields.Monetary(related='asset_id.book_value', readonly=True)

    disposal_type = fields.Selection([
        ('sale', 'Sale'),
        ('scrap', 'Scrap'),
        ('donation', 'Donation'),
        ('lost', 'Lost / Stolen'),
    ], required=True, default='sale')
    disposal_date = fields.Date(required=True, default=fields.Date.today)
    sale_amount = fields.Monetary(default=0.0)
    sale_partner_id = fields.Many2one('res.partner')
    notes = fields.Text()

    estimated_gain_loss = fields.Monetary(compute='_compute_gain_loss')

    @api.model
    def _default_asset(self):
        ctx = self.env.context
        if ctx.get('active_model') == 'fusion.asset':
            return ctx.get('active_id')
        return False

    @api.depends('sale_amount', 'book_value', 'disposal_type')
    def _compute_gain_loss(self):
        for w in self:
            if w.disposal_type == 'sale':
                w.estimated_gain_loss = w.sale_amount - w.book_value
            else:
                w.estimated_gain_loss = -w.book_value

    def action_dispose(self):
        self.ensure_one()
        if self.asset_id.state == 'disposed':
            raise UserError(_("Asset already disposed."))
        partner = self.sale_partner_id if self.disposal_type == 'sale' else None
        self.env['fusion.asset.engine'].dispose_asset(
            self.asset_id,
            sale_amount=self.sale_amount if self.disposal_type == 'sale' else 0,
            sale_date=self.disposal_date,
            sale_partner=partner,
            disposal_type=self.disposal_type,
        )
        return {
            'type': 'ir.actions.act_window',
            'res_model': 'fusion.asset',
            'res_id': self.asset_id.id,
            'view_mode': 'form',
            'target': 'current',
        }