//! Runs the shared `Store` conformance suite against a live Postgres.
//!
//! Gated behind the TRUSTY_PG_URL env var. Set it to a libpq connection
//! string that points at a disposable test DB, e.g.:
//!
//!     TRUSTY_PG_URL="host=localhost user=postgres password=postgres dbname=trusty_test"
//!     cargo test -p trusty-postgres --test conformance -- --nocapture
//!
//! If TRUSTY_PG_URL is not set, the test prints a skip notice and exits
//! clean. This keeps the default `cargo test --workspace` hermetic.

use trusty_postgres::TrustyPostgres;
use trusty_store::testing::run_conformance;

const ENV_URL: &str = "TRUSTY_PG_URL";

fn reset_schema(store: &mut TrustyPostgres) {
    // Drop-and-recreate so the suite starts from a known-empty state.
    // Done by connecting to the same DB and issuing the drops directly.
    let url = std::env::var(ENV_URL).expect("TRUSTY_PG_URL must be set");
    let mut client = postgres::Client::connect(&url, postgres::NoTls).expect("connect");
    client
        .batch_execute(
            "DROP TABLE IF EXISTS chain_checkpoint CASCADE;
             DROP TABLE IF EXISTS producer_identity CASCADE;
             DROP TABLE IF EXISTS chain_tips CASCADE;
             DROP TABLE IF EXISTS hash_index CASCADE;
             DROP TABLE IF EXISTS provenance_envelope CASCADE;
             DROP TABLE IF EXISTS schema_meta CASCADE;",
        )
        .expect("drop tables");
    let _ = store; // store gets recreated below
}

#[test]
fn postgres_passes_store_conformance() {
    let url = match std::env::var(ENV_URL) {
        Ok(v) => v,
        Err(_) => {
            eprintln!(
                "SKIP: set {} to run the conformance suite against a live Postgres",
                ENV_URL
            );
            return;
        }
    };

    // Initial open to ensure the tables exist.
    let mut store = TrustyPostgres::open(&url).expect("open");
    reset_schema(&mut store);
    // Re-open so apply_schema runs against a clean DB.
    let mut store = TrustyPostgres::open(&url).expect("re-open");

    run_conformance(&mut store);
}