// Acceptance for P2.3 (round-trip) — the in-memory repository persisted to
// `<root>/db.json` via `std.json` and reloaded into a FRESH repository.
//
// Asserts:
//   1. Every entity (app + bundle ids, release, two artifacts, channel,
//      audit event) survives save -> reload field-for-field.
//   2. db.json is valid JSON, re-parseable by `std.json` (re-parse it).
//   3. Re-saving the reloaded repo yields BYTE-IDENTICAL db.json — the
//      stable (insertion-order) key-order guarantee.
// Uses a fresh `<root>` under `.sx-tmp/` and cleans up. Exits 0 only if
// every assertion holds (process.assert aborts otherwise).
#import "modules/std.sx";
#import "modules/std/json.sx";
#import "modules/std/fs.sx";
process :: #import "modules/std/process.sx";
#import "../src/domain/platform.sx";
#import "../src/domain/app.sx";
#import "../src/domain/release.sx";
#import "../src/domain/artifact.sx";
#import "../src/domain/channel.sx";
#import "../src/domain/audit.sx";
#import "../src/repo/repo.sx";
#import "../src/repo/db.sx";

// ── Field-for-field equality over the domain entities ────────────────
bundle_eq :: (a: BundleId, b: BundleId) -> bool {
    return a.platform == b.platform and a.value == b.value;
}
app_eq :: (a: App, b: App) -> bool {
    if a.id != b.id { return false; }
    if a.slug != b.slug { return false; }
    if a.display_name != b.display_name { return false; }
    if a.owner != b.owner { return false; }
    if a.visibility != b.visibility { return false; }
    if a.created_at != b.created_at { return false; }
    if a.updated_at != b.updated_at { return false; }
    if a.bundle_ids.len != b.bundle_ids.len { return false; }
    i := 0;
    while i < a.bundle_ids.len {
        if !bundle_eq(a.bundle_ids.items[i], b.bundle_ids.items[i]) { return false; }
        i += 1;
    }
    return true;
}
release_eq :: (a: Release, b: Release) -> bool {
    return a.id == b.id and a.app_id == b.app_id and a.version == b.version
        and a.build == b.build and a.channel == b.channel and a.notes == b.notes
        and a.created_by == b.created_by and a.created_at == b.created_at
        and a.published_at == b.published_at;
}
artifact_eq :: (a: Artifact, b: Artifact) -> bool {
    return a.id == b.id and a.app_id == b.app_id and a.release_id == b.release_id
        and a.platform == b.platform and a.filename == b.filename
        and a.content_type == b.content_type and a.size_bytes == b.size_bytes
        and a.sha256 == b.sha256 and a.storage_key == b.storage_key
        and a.metadata == b.metadata and a.validation_status == b.validation_status;
}
channel_eq :: (a: Channel, b: Channel) -> bool {
    return a.app_id == b.app_id and a.name == b.name
        and a.current_release_id == b.current_release_id
        and a.policy == b.policy and a.rollout_percent == b.rollout_percent;
}
audit_eq :: (a: AuditEvent, b: AuditEvent) -> bool {
    return a.id == b.id and a.actor == b.actor and a.action == b.action
        and a.target_type == b.target_type and a.target_id == b.target_id
        and a.metadata == b.metadata and a.created_at == b.created_at;
}

// ── Fixtures ─────────────────────────────────────────────────────────
the_app :: (alloc: Allocator) -> App {
    a : App = .{
        id = "app_01", slug = "acme-app", display_name = "Acme App",
        owner = "user_01", visibility = .public,
        created_at = 1700000000, updated_at = 1700000050,
    };
    a.bundle_ids.append(BundleId.{ platform = .ios,         value = "co.acme.app" }, alloc);
    a.bundle_ids.append(BundleId.{ platform = .android_apk, value = "co.acme.app.android" }, alloc);
    return a;
}
the_release :: () -> Release {
    return Release.{
        id = "rel_01", app_id = "app_01", version = "1.2.3-beta.1", build = 42,
        channel = "stable", notes = "first cut\nwith a newline", created_by = "user_01",
        created_at = 1700000100, published_at = 1700000200,
    };
}
apk_artifact :: () -> Artifact {
    return Artifact.{
        id = "art_apk", app_id = "app_01", release_id = "rel_01", platform = .android_apk,
        filename = "acme.apk", content_type = "application/vnd.android.package-archive",
        size_bytes = 10485760,
        sha256 = "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
        storage_key = "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
        metadata = "{\"min_os\":\"14\"}", validation_status = .valid,
    };
}
ipa_artifact :: () -> Artifact {
    return Artifact.{
        id = "art_ipa", app_id = "app_01", release_id = "rel_01", platform = .ios,
        filename = "acme.ipa", content_type = "application/octet-stream",
        size_bytes = 20971520,
        sha256 = "ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad",
        storage_key = "ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad",
        metadata = "", validation_status = .pending,
    };
}
the_channel :: () -> Channel {
    return Channel.{
        app_id = "app_01", name = "stable", current_release_id = "rel_01",
        policy = .percentage, rollout_percent = 25,
    };
}
the_event :: () -> AuditEvent {
    return AuditEvent.{
        id = "ev_01", actor = "user_01", action = "publish",
        target_type = "release", target_id = "rel_01",
        metadata = "{\"channel\":\"stable\"}", created_at = 1700000300,
    };
}

main :: () -> i32 {
    root := ".sx-tmp/repo-roundtrip";
    root2 := ".sx-tmp/repo-roundtrip-2";
    process.run(concat("rm -rf ", root));
    process.run(concat("rm -rf ", root2));

    // ── Build the original model ─────────────────────────────────────
    repo := Repo.init();
    app0 := the_app(repo.own_allocator);
    rel0 := the_release();
    apk0 := apk_artifact();
    ipa0 := ipa_artifact();
    chan0 := the_channel();
    ev0 := the_event();
    repo.create_app(app0);
    repo.create_release(rel0);
    repo.create_artifact(apk0);
    repo.create_artifact(ipa0);
    repo.create_channel(chan0);
    repo.create_audit_event(ev0);

    // ── Persist ──────────────────────────────────────────────────────
    serr := false;
    save(repo, root) catch { serr = true; };
    process.assert(!serr, "save must succeed");
    process.assert(fs.exists(path_join(root, "db.json")), "db.json must exist after save");

    // ── 2. db.json is valid JSON re-parseable by std.json ────────────
    raw := fs.read_file(path_join(root, "db.json"));
    process.assert(raw != null, "db.json must be readable");
    bytes := raw!;
    gpa := GPA.init();
    arena := Arena.init(xx gpa, 65536);
    _, perr := parse(bytes, xx arena);
    process.assert(!perr, "db.json must be valid JSON re-parseable by std.json");
    arena.deinit();
    print("  db.json is valid JSON ({} bytes)\n", bytes.len);

    // ── 1. Reload into a FRESH repo and compare field-for-field ──────
    repo2, lerr := load(root);
    if lerr { process.assert(false, "load must succeed"); return 1; }
    process.assert(repo2.apps.len == 1, "one app reloaded");
    process.assert(repo2.releases.len == 1, "one release reloaded");
    process.assert(repo2.artifacts.len == 2, "two artifacts reloaded");
    process.assert(repo2.channels.len == 1, "one channel reloaded");
    process.assert(repo2.audit_events.len == 1, "one audit event reloaded");

    process.assert(app_eq(repo2.apps.items[0], app0), "app survives round-trip");

    rg := repo2.get_release("rel_01");
    process.assert(rg != null, "release found by id after reload");
    process.assert(release_eq(rg!, rel0), "release survives round-trip");

    // find_artifact_by_digest — the P2.2 content-address lookup.
    ag := repo2.find_artifact_by_digest(apk0.sha256);
    process.assert(ag != null, "apk artifact found by digest after reload");
    process.assert(artifact_eq(ag!, apk0), "apk artifact survives round-trip");
    ig := repo2.find_artifact_by_digest(ipa0.sha256);
    process.assert(ig != null, "ipa artifact found by digest after reload");
    process.assert(artifact_eq(ig!, ipa0), "ipa artifact survives round-trip");

    cg := repo2.get_channel("app_01", "stable");
    process.assert(cg != null, "channel found after reload");
    process.assert(channel_eq(cg!, chan0), "channel survives round-trip");

    process.assert(audit_eq(repo2.audit_events.items[0], ev0), "audit event survives round-trip");

    // find_app_by_slug — the slug lookup.
    sg := repo2.find_app_by_slug("acme-app");
    process.assert(sg != null, "app found by slug after reload");
    sga := sg!;
    process.assert(sga.id == "app_01", "slug lookup returns the right app");
    print("  reloaded model equals original (every field)\n");

    // ── 3. Re-save the reloaded repo -> byte-identical db.json ───────
    serr2 := false;
    save(repo2, root2) catch { serr2 = true; };
    process.assert(!serr2, "re-save must succeed");
    raw2 := fs.read_file(path_join(root2, "db.json"));
    process.assert(raw2 != null, "re-saved db.json must be readable");
    process.assert(raw2! == bytes, "re-save is byte-identical (stable key order)");
    print("  re-save is byte-identical (stable key order)\n");

    // ── cleanup ──────────────────────────────────────────────────────
    process.run(concat("rm -rf ", root));
    process.run(concat("rm -rf ", root2));
    print("repo_roundtrip: ALL CASES PASS\n");
    return 0;
}