# -*- coding: utf-8 -*-
# Copyright 2026 Nexa Systems Inc.
# License OPL-1 (Odoo Proprietary License v1.0)
# Part of the Fusion Plating product family.

from odoo import api, fields, models

from odoo.addons.fusion_plating.models._fp_uom_selection import FP_UOM_SELECTION


class FpChemical(models.Model):
    """Physical chemical container in the shop's chemical inventory.

    A chemical record represents a managed container — drum, tote, jug,
    cylinder — of a specific product, stored in a specific facility and
    location, with on-hand quantity and reorder thresholds. It links to the
    Safety Data Sheet that governs handling, and may optionally link to the
    Odoo product/stock record when the same chemistry is also tracked as
    inventory.

    Storage compatibility (acid vs base, oxidizer vs flammable, etc.) is
    captured via a self-referential many2many of incompatible chemicals so
    a future workflow can warn on co-located storage.
    """
    _name = 'fusion.plating.chemical'
    _description = 'Fusion Plating — Chemical'
    _inherit = ['mail.thread', 'mail.activity.mixin']
    _order = 'name'

    name = fields.Char(
        string='Chemical',
        required=True,
        tracking=True,
    )
    sds_id = fields.Many2one(
        'fusion.plating.sds',
        string='Safety Data Sheet',
        tracking=True,
    )
    product_id = fields.Many2one(
        'product.product',
        string='Stock Product',
        help='Optional link to the Odoo product when the chemistry is also '
             'tracked as inventory.',
    )
    facility_id = fields.Many2one(
        'fusion.plating.facility',
        string='Facility',
        tracking=True,
    )
    location = fields.Char(
        string='Storage Location',
        help='Free-text storage location, e.g. "Acid Cabinet 2" or "Drum bay B".',
    )
    container_size = fields.Float(
        string='Container Size',
        help='Numerical size of one container, expressed in the unit '
             'selected below (e.g. 200 with unit "L" for a 200 L drum).',
    )
    container_uom = fields.Selection(
        FP_UOM_SELECTION,
        string='Container UoM',
        help='Unit of measure for the container size — pick from the '
             'curated list to keep inventory consistent (L, kg, lb, gal).',
    )
    quantity_on_hand = fields.Float(
        string='Quantity On Hand',
        tracking=True,
    )
    reorder_point = fields.Float(
        string='Reorder Point',
        help='When quantity on hand falls below this level, the chemical '
             'should be reordered.',
    )
    incompatible_with_ids = fields.Many2many(
        'fusion.plating.chemical',
        'fp_chemical_incompat_rel',
        'chemical_id',
        'incompatible_id',
        string='Incompatible With',
        help='Chemicals that must not be stored next to this one.',
    )
    needs_reorder = fields.Boolean(
        string='Needs Reorder',
        compute='_compute_needs_reorder',
        store=True,
    )
    company_id = fields.Many2one(
        'res.company',
        string='Company',
        default=lambda self: self.env.company,
    )
    active = fields.Boolean(default=True)
    notes = fields.Html(string='Notes')

    @api.depends('quantity_on_hand', 'reorder_point')
    def _compute_needs_reorder(self):
        for rec in self:
            rec.needs_reorder = bool(
                rec.reorder_point and rec.quantity_on_hand <= rec.reorder_point
            )