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//! Aluminium (EU ESPR ~2030, CBAM-aligned).
use serde::{Deserialize, Serialize};
use crate::identifier::Gtin;
use crate::product_group::ProductionRoute;
/// Aluminium product group data for EU ESPR carbon intensity reporting.
#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
#[serde(rename_all = "camelCase")]
pub struct AluminiumData {
/// 14-digit GTIN identifying the aluminium product.
pub gtin: Gtin,
/// Alloy series designation, e.g. `"1xxx"`, `"3xxx"`, `"5xxx"`, `"6xxx"`.
pub alloy_grade: String,
/// Aluminium production route — determines carbon intensity calculation basis.
pub production_route: ProductionRoute,
/// Carbon intensity in kg CO₂e per tonne of aluminium produced.
pub co2e_per_tonne_kg: f64,
/// Recycled scrap content as a percentage of total input (0.0–100.0).
pub recycled_content_pct: f64,
/// ISO 3166-1 alpha-2 country of primary production.
pub country_of_origin: String,
/// Annual production volume in tonnes (optional).
#[serde(skip_serializing_if = "Option::is_none")]
pub annual_production_tonnes: Option<f64>,
}
impl crate::product_group::payload::ProductGroupPayload for AluminiumData {
fn gtin(&self) -> Option<&str> {
Some(self.gtin.as_str())
}
/// This act defines no model identifier.
fn model_identifier(&self) -> Option<&str> {
None
}
/// This act's schema declares no substances-of-concern field.
fn svhc_substances(&self) -> Option<&[crate::product_group::SvhcSubstance]> {
None
}
/// This group models no product category.
///
/// The catalog declared `primary`, `secondary-recycled` and `mixed` under
/// `productCategories` until they were removed, and they were never
/// categories — they are three of the seven [`ProductionRoute`] variants,
/// copied from this group's `productionRoute` schema enum. How metal was
/// made is a different axis from what the product is, and answering with
/// the route would let a credential scoped to a *category* be satisfied by
/// a *process*.
///
/// They survived because the catalog-versus-schema drift guard was pointed
/// at `productionRoute`, so it confirmed the values were legal — of the
/// wrong property. No act defines an aluminium category axis, so the
/// catalog now declares none and this answer agrees with it.
fn product_category(&self) -> Option<&str> {
None
}
}