"""Persisted asset anomaly flags from the engine's variance detection."""

from odoo import fields, models


SEVERITY = [('low', 'Low'), ('medium', 'Medium'), ('high', 'High')]
ANOMALY_TYPES = [
    ('behind_schedule', 'Behind Schedule'),
    ('ahead_of_schedule', 'Ahead of Schedule'),
    ('low_utilization', 'Low Utilization'),
]


class FusionAssetAnomaly(models.Model):
    _name = "fusion.asset.anomaly"
    _description = "Flagged Asset Anomaly"
    _order = "detected_at desc, severity desc"

    asset_id = fields.Many2one('fusion.asset', required=True, ondelete='cascade')
    company_id = fields.Many2one(related='asset_id.company_id', store=True)
    anomaly_type = fields.Selection(ANOMALY_TYPES, required=True)
    severity = fields.Selection(SEVERITY, required=True)
    expected = fields.Float()
    actual = fields.Float()
    variance_pct = fields.Float()
    detail = fields.Text()
    detected_at = fields.Datetime(default=fields.Datetime.now, required=True)
    state = fields.Selection([
        ('new', 'New'),
        ('acknowledged', 'Acknowledged'),
        ('resolved', 'Resolved'),
        ('dismissed', 'Dismissed'),
    ], default='new', required=True)

    def action_acknowledge(self):
        self.write({'state': 'acknowledged'})

    def action_dismiss(self):
        self.write({'state': 'dismissed'})

    def action_resolve(self):
        self.write({'state': 'resolved'})