// @block-start initialize-mutable-shard
pub async fn main() -> anyhow::Result<()> {
    // @hide-start
    const QDRANT_URL: &str = "";
    const QDRANT_API_KEY: &str = "";
    let mut upload_queue: std::collections::VecDeque<::qdrant_client::qdrant::PointStruct> =
        std::collections::VecDeque::new();
    // @hide-end

    use std::path::*;
    use qdrant_edge::*;

    const MUTABLE_SHARD_DIR: &str = "./qdrant-edge-directory/mutable";
    const VECTOR_DIMENSION: usize = 4;
    const VECTOR_NAME: &str = "my-vector";

    fs_err::create_dir_all(MUTABLE_SHARD_DIR)?;
    let config = EdgeConfigBuilder::new()
        .on_disk_payload(true)
        .vector(
            VECTOR_NAME,
            EdgeVectorParamsBuilder::new(VECTOR_DIMENSION, Distance::Cosine)
                .on_disk(true)
                .build(),
        )
        .build();

    let mutable_shard = EdgeShard::new(
        Path::new(MUTABLE_SHARD_DIR),
        config,
    )?;
    // @block-end initialize-mutable-shard

    // @block-start initialize-immutable-shard
    use std::path::*;
    use qdrant_edge::*;

    const COLLECTION_NAME: &str = "edge-collection";
    let snapshot_url = format!(
        "{QDRANT_URL}/collections/{COLLECTION_NAME}/shards/0/snapshot"
    );

    const IMMUTABLE_SHARD_DIR: &str = "./qdrant-edge-directory/immutable";
    let data_dir = Path::new(IMMUTABLE_SHARD_DIR);

    let restore_dir = tempfile::Builder::new()
        .tempdir_in(data_dir.parent().unwrap_or(Path::new(".")))?;
    let snapshot_path = restore_dir.path().join("shard.snapshot");

    let mut bytes = Vec::new();
    std::io::copy(
        &mut ureq::get(&snapshot_url)
            .header("api-key", QDRANT_API_KEY)
            .call()?
            .into_body()
            .into_reader(),
        &mut bytes,
    )?;
    fs_err::write(&snapshot_path, &bytes)?;

    if data_dir.exists() {
        fs_err::remove_dir_all(data_dir)?;
    }
    fs_err::create_dir_all(data_dir)?;

    EdgeShard::unpack_snapshot(&snapshot_path, data_dir)?;

    let immutable_shard = EdgeShard::load(data_dir, None)?;
    // @block-end initialize-immutable-shard

    // @block-start dual-write
    use std::collections::*;
    use std::time::*;
    use serde_json::json;
    use qdrant_edge::*;

    const SYNC_TIMESTAMP_KEY: &str = "timestamp";
    let id = 2u64;
    let vector = vec![0.4f32, 0.3, 0.2, 0.1];
    let timestamp = SystemTime::now()
        .duration_since(UNIX_EPOCH)
        .unwrap()
        .as_secs_f64();
    let payload = json!({
        "color": "green",
        SYNC_TIMESTAMP_KEY: timestamp,
    });

    let edge_points: Vec<PointStructPersisted> = vec![
        qdrant_edge::PointStruct::new(
            PointId::NumId(id),
            Vectors::new_named([(VECTOR_NAME, vector.clone())]),
            payload.clone(),
        )
        .into(),
    ];
    mutable_shard.update(UpdateOperation::PointOperation(
        PointOperations::UpsertPoints(
            PointInsertOperations::PointsList(edge_points),
        ),
    ))?;

    let rest_point = ::qdrant_client::qdrant::PointStruct::new(
        id,
        HashMap::from([(VECTOR_NAME.to_string(), vector)]),
        payload.as_object().cloned().unwrap_or_default(),
    );
    upload_queue.push_back(rest_point);
    // @block-end dual-write

    // @block-start update-immutable-shard
    use std::time::*;
    use qdrant_edge::*;
    use qdrant_edge::internal::*;

    let sync_timestamp = SystemTime::now()
        .duration_since(UNIX_EPOCH)
        .unwrap()
        .as_secs_f64();

    let current_manifest = immutable_shard.snapshot_manifest()?;

    let update_url = format!(
        "{QDRANT_URL}/collections/{COLLECTION_NAME}/shards/0/snapshot\
        /partial/create"
    );

    let temp_dir = tempfile::tempdir_in(data_dir)?;
    let partial_snapshot_path = temp_dir.path().join("partial.snapshot");

    let mut bytes = Vec::new();
    std::io::copy(
        &mut ureq::post(&update_url)
            .header("api-key", QDRANT_API_KEY)
            .send_json(&current_manifest)?
            .into_body()
            .into_reader(),
        &mut bytes,
    )?;
    fs_err::write(&partial_snapshot_path, &bytes)?;

    let unpacked_dir = tempfile::tempdir_in(data_dir)?;
    EdgeShard::unpack_snapshot(&partial_snapshot_path, unpacked_dir.path())?;
    let snapshot_manifest = SnapshotManifest::load_from_snapshot(
        unpacked_dir.path(),
        None,
    )?;

    let immutable_shard = EdgeShard::recover_partial_snapshot(
        data_dir,
        &current_manifest,
        unpacked_dir.path(),
        &snapshot_manifest,
    )?;
    // @block-end update-immutable-shard

    // @block-start delete-synced-points
    use ordered_float::*;
    use qdrant_edge::*;

    let filter = Filter::new_must(Condition::Field(FieldCondition::new_range(
        SYNC_TIMESTAMP_KEY.parse::<JsonPath>().unwrap(),
        Range {
            lte: Some(OrderedFloat(sync_timestamp)),
            ..Default::default()
        },
    )));

    mutable_shard.update(UpdateOperation::PointOperation(
        PointOperations::DeletePointsByFilter(filter),
    ))?;
    // @block-end delete-synced-points

    // @block-start query-both-shards
    use std::cmp::*;
    use std::collections::*;
    use qdrant_edge::*;

    let query = QueryRequest {
        prefetches: vec![],
        query: Some(ScoringQuery::Vector(QueryEnum::Nearest(NamedQuery {
            query: vec![0.2f32, 0.1, 0.9, 0.7].into(),
            using: Some(VECTOR_NAME.to_string()),
        }))),
        filter: None,
        score_threshold: None,
        limit: 10,
        offset: 0,
        params: None,
        with_vector: WithVector::Bool(false),
        with_payload: WithPayloadInterface::Bool(true),
    };

    let mut all_results = mutable_shard.query(query.clone())?;
    all_results.extend(immutable_shard.query(query)?);

    all_results.sort_by(|a, b| {
        b.score
            .partial_cmp(&a.score)
            .unwrap_or(Ordering::Equal)
    });

    let mut seen_ids = HashSet::new();
    let results: Vec<_> = all_results
        .into_iter()
        .filter(|p| seen_ids.insert(p.id.clone()))
        .take(10)
        .collect();
    // @block-end query-both-shards

    Ok(())
}