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//! Iron & Steel (EU ESPR, carbon intensity).
use serde::{Deserialize, Serialize};
use crate::identifier::Gtin;
use crate::product_group::ProductionRoute;
/// Iron and Steel product group data for EU ESPR carbon intensity reporting.
#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
#[serde(rename_all = "camelCase")]
pub struct SteelData {
/// 14-digit GTIN identifying the steel product.
pub gtin: Gtin,
/// Carbon intensity in tonne CO₂e per tonne of steel produced.
pub co2e_per_tonne_steel: f64,
/// Recycled scrap content as a percentage of total input material (0.0–100.0).
pub recycled_scrap_content_pct: f64,
/// Steel grade / product category, e.g. `"flat"`, `"long"`, `"tube"`.
pub product_category: String,
/// ISO 3166-1 alpha-2 country of production.
pub country_of_origin: String,
/// Steel production route — determines carbon intensity calculation basis.
pub production_route: ProductionRoute,
/// 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 SteelData {
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
}
/// The steel grade. Constrained by the `productCategory` enum in this
/// group's schema rather than by the Rust type, which is the same guarantee
/// every other validated string field has.
fn product_category(&self) -> Option<&str> {
Some(&self.product_category)
}
}