//! End-to-end coverage for the campaign-run store (cycle 0107 task 3): the
//! `campaign_runs.jsonl` sibling store's persistence and isolation properties,
//! driven through the PUBLIC `Registry` surface only (`append_family` /
//! `append_campaign_run` / `load_family_members` / `load_campaign_runs`) — the
//! in-crate unit tests in `lib.rs`/`lineage.rs` pin the counter and round-trip
//! shape on one live `Registry` instance; these tests pin the two properties a
//! real multi-invocation CLI depends on: the store survives a fresh `Registry`
//! handle (it is a real on-disk file, not an in-memory cache), and writing to
//! it never perturbs the existing family store it sits beside.

use std::fs;
use std::path::PathBuf;

use aura_core::{Scalar, Timestamp};
use aura_engine::{FamilySelection, RunManifest, RunMetrics, RunReport, SelectionMode};
use aura_registry::{
    CampaignRunRecord, CellRealization, FamilyKind, Registry, StageRealization, StageSelection,
};

fn temp_dir(name: &str) -> PathBuf {
    let dir = std::path::Path::new(env!("CARGO_TARGET_TMPDIR"))
        .join(format!("aura-registry-campaign-e2e-{name}"));
    let _ = fs::remove_dir_all(&dir);
    fs::create_dir_all(&dir).expect("create temp dir");
    dir.join("runs.jsonl")
}

fn tiny_report() -> RunReport {
    RunReport {
        manifest: RunManifest {
            commit: "c".to_string(),
            params: vec![],
            defaults: vec![],
            window: (Timestamp(1), Timestamp(2)),
            seed: 0,
            broker: "b".to_string(),
            selection: None,
            instrument: None,
            topology_hash: None,
            project: None,
        },
        metrics: RunMetrics { total_pips: 1.0, max_drawdown: 0.0, bias_sign_flips: 0, r: None },
    }
}

fn campaign_run(campaign: &str) -> CampaignRunRecord {
    CampaignRunRecord {
        campaign: campaign.to_string(),
        process: "proc".to_string(),
        run: 0,
        seed: 1,
        cells: vec![CellRealization {
            strategy: "strat-id".to_string(),
            instrument: "EURUSD".to_string(),
            window_ms: (0, 1000),
            regime: None,
            regime_ordinal: 0,
            fault: None,
            coverage: None,
            stages: vec![StageRealization {
                block: "std::sweep".to_string(),
                family_id: Some(format!("{campaign}-0-EURUSD-w0-s0-0")),
                survivor_ordinals: None,
                selection: Some(StageSelection {
                    winner_ordinal: 0,
                    params: vec![("x".to_string(), Scalar::i64(1))],
                    selection: FamilySelection {
                        selection_metric: "sqn_normalized".to_string(),
                        n_trials: 1,
                        raw_winner_metric: 1.0,
                        mode: SelectionMode::Argmax,
                        deflated_score: None,
                        overfit_probability: None,
                        n_resamples: None,
                        block_len: None,
                        seed: None,
                        neighbourhood_score: None,
                        n_neighbours: None,
                    },
                }),
                bootstrap: None,
                window_faults: vec![],
            }],
        }],
        generalizations: vec![],
        trace_name: None,
    }
}

/// Property: the campaign-run store is a real on-disk file, not a cache tied to
/// one `Registry` instance — a record appended by one `Registry::open` handle
/// is visible to a SECOND, freshly-opened handle over the same path. This is
/// what makes the store usable across separate CLI invocations (author runs
/// `aura campaign run` twice, in two processes, against the same registry).
#[test]
fn campaign_run_persists_across_fresh_registry_handles() {
    let path = temp_dir("persist_across_handles");
    let writer = Registry::open(&path);
    let run = writer.append_campaign_run(&campaign_run("camp-a")).expect("append");
    assert_eq!(run, 0);

    // a brand-new handle, as a second CLI invocation would construct
    let reader = Registry::open(&path);
    let loaded = reader.load_campaign_runs().expect("load from fresh handle");
    assert_eq!(loaded.len(), 1);
    assert_eq!(loaded[0].campaign, "camp-a");
    assert_eq!(loaded[0].run, 0);
}

/// Property: `campaign_runs.jsonl` is a sibling store, wholly independent of
/// the existing `families.jsonl` flat-run store it sits beside — appending a
/// campaign run does not add, remove, or alter a single family member record,
/// and appending a family does not touch the campaign-run store. Two
/// independently-growing stores at the same registry root, per the module's
/// documented growth pattern.
#[test]
fn campaign_run_store_does_not_perturb_the_sibling_family_store() {
    let path = temp_dir("sibling_isolation");
    let reg = Registry::open(&path);

    let before_families = reg.append_family("fam", FamilyKind::Sweep, &[tiny_report()]).unwrap();
    let members_before = reg.load_family_members().expect("load families before");
    assert_eq!(members_before.len(), 1);

    reg.append_campaign_run(&campaign_run("camp-b")).expect("append campaign run");

    // the family store is byte-for-byte unaffected by the campaign-run write
    let members_after = reg.load_family_members().expect("load families after");
    assert_eq!(members_after, members_before, "family store untouched by a campaign-run append");
    assert_eq!(before_families, "fam-0");

    // and the reverse: appending another family leaves the campaign-run store's
    // single record alone
    reg.append_family("fam2", FamilyKind::Sweep, &[tiny_report()]).unwrap();
    let runs = reg.load_campaign_runs().expect("load campaign runs");
    assert_eq!(runs.len(), 1, "campaign-run store untouched by a family append");
    assert_eq!(runs[0].campaign, "camp-b");
}