//! Iron & Steel (EU ESPR, carbon intensity).
use serde::{Deserialize, Serialize};
use crate::domain::gtin::Gtin;
use crate::domain::sector::enums::ProductionRoute;
/// Iron and Steel sector 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>,
}