"""Asset disposal records (sale, scrap, donation)."""

from odoo import api, fields, models


DISPOSAL_TYPES = [
    ('sale', 'Sale'),
    ('scrap', 'Scrap'),
    ('donation', 'Donation'),
    ('lost', 'Lost / Stolen'),
]


class FusionAssetDisposal(models.Model):
    _name = "fusion.asset.disposal"
    _description = "Asset Disposal Record"
    _order = "disposal_date desc, id desc"
    _inherit = ['mail.thread']

    asset_id = fields.Many2one(
        'fusion.asset', required=True, ondelete='restrict', tracking=True,
    )
    company_id = fields.Many2one(related='asset_id.company_id', store=True)
    currency_id = fields.Many2one(related='asset_id.currency_id', store=True)

    disposal_type = fields.Selection(
        DISPOSAL_TYPES, required=True, default='sale', tracking=True,
    )
    disposal_date = fields.Date(
        required=True, default=fields.Date.today, tracking=True,
    )
    sale_amount = fields.Monetary(
        default=0.0, tracking=True,
        help="Cash received (for sale disposal type).",
    )
    sale_partner_id = fields.Many2one('res.partner', tracking=True)

    book_value_at_disposal = fields.Monetary(
        readonly=True,
        help="Asset book value at disposal date.",
    )
    gain_loss_amount = fields.Monetary(compute='_compute_gain_loss', store=True)
    notes = fields.Text()

    move_id = fields.Many2one(
        'account.move', readonly=True, copy=False,
        help="Journal entry created for this disposal.",
    )

    @api.depends('sale_amount', 'book_value_at_disposal', 'disposal_type')
    def _compute_gain_loss(self):
        for d in self:
            if d.disposal_type == 'sale':
                d.gain_loss_amount = d.sale_amount - d.book_value_at_disposal
            else:
                d.gain_loss_amount = -d.book_value_at_disposal