//! Product data adapters. The deal source is a user-pasted product URL — no
//! per-retailer scrapers. Adapters are generic platform readers; the first is
//! Shopify, whose storefronts expose a public `/products/{handle}.json` document.

use rust_decimal::Decimal;

mod shopify;

/// Normalised product snapshot produced by an adapter.
#[derive(Debug, Clone)]
pub struct FetchedProduct {
    pub title: String,
    pub price: Decimal,
    pub currency: String,
    pub image_url: Option<String>,
    pub in_stock: Option<bool>,
    pub source: &'static str,
}

/// A shared HTTP client tuned for storefront fetches.
pub fn http_client() -> reqwest::Client {
    reqwest::Client::builder()
        .user_agent("consumers-bot/0.1 (+self-hosted wantlist price watcher)")
        .timeout(std::time::Duration::from_secs(15))
        .build()
        .expect("failed to build reqwest client")
}

/// Try every adapter in turn. Returns the first that recognises the URL.
pub async fn fetch_product(
    client: &reqwest::Client,
    url: &str,
    default_currency: &str,
) -> anyhow::Result<FetchedProduct> {
    if let Some(p) = shopify::fetch(client, url, default_currency).await? {
        return Ok(p);
    }
    anyhow::bail!("no adapter could read this URL (only Shopify storefronts are supported for now)")
}