use application::storage::{
    IngestAssetCommand, IngestAssetHandler, RegisterLibraryPathCommand, RegisterLibraryPathHandler,
    RegisterVolumeCommand, RegisterVolumeHandler,
};
use application::testing::{
    InMemoryAssetRepository, InMemoryFileStorage, InMemoryIngestSessionRepository,
    InMemoryLibraryPathRepository, InMemoryQuotaRepository, InMemoryStorageVolumeRepository,
    InMemoryUsageLedgerRepository, StubEventPublisher,
};
use bytes::Bytes;
use domain::entities::{IngestStatus, QuotaDefinition, TimePeriod, UsageType};
use domain::errors::DomainError;
use domain::ports::QuotaRepository;
use domain::value_objects::SystemId;
use std::sync::Arc;

struct Harness {
    ingest_repo: Arc<InMemoryIngestSessionRepository>,
    path_repo: Arc<InMemoryLibraryPathRepository>,
    quota_repo: Arc<InMemoryQuotaRepository>,
    ledger_repo: Arc<InMemoryUsageLedgerRepository>,
    asset_repo: Arc<InMemoryAssetRepository>,
    file_storage: Arc<InMemoryFileStorage>,
    event_pub: Arc<StubEventPublisher>,
    vol_repo: Arc<InMemoryStorageVolumeRepository>,
}

impl Harness {
    fn new() -> Self {
        Self {
            ingest_repo: Arc::new(InMemoryIngestSessionRepository::new()),
            path_repo: Arc::new(InMemoryLibraryPathRepository::new()),
            quota_repo: Arc::new(InMemoryQuotaRepository::new()),
            ledger_repo: Arc::new(InMemoryUsageLedgerRepository::new()),
            asset_repo: Arc::new(InMemoryAssetRepository::new()),
            file_storage: Arc::new(InMemoryFileStorage::new()),
            event_pub: Arc::new(StubEventPublisher::new()),
            vol_repo: Arc::new(InMemoryStorageVolumeRepository::new()),
        }
    }

    fn ingest_handler(&self) -> IngestAssetHandler {
        IngestAssetHandler::new(
            self.ingest_repo.clone(),
            self.path_repo.clone(),
            self.quota_repo.clone(),
            self.ledger_repo.clone(),
            self.asset_repo.clone(),
            self.file_storage.clone(),
            self.event_pub.clone(),
        )
    }

    async fn setup_volume_and_path(&self, owner: SystemId) -> SystemId {
        let vol_handler = RegisterVolumeHandler::new(self.vol_repo.clone());
        let vol = vol_handler
            .execute(RegisterVolumeCommand {
                volume_name: "main".into(),
                uri_prefix: "file:///data".into(),
                is_writable: true,
            })
            .await
            .unwrap();

        let path_handler =
            RegisterLibraryPathHandler::new(self.vol_repo.clone(), self.path_repo.clone());
        let path = path_handler
            .execute(RegisterLibraryPathCommand {
                volume_id: vol.volume_id,
                relative_path: "photos/inbox".into(),
                owner_id: owner,
                is_ingest_destination: true,
            })
            .await
            .unwrap();
        path.path_id
    }
}

fn valid_checksum() -> String {
    "a".repeat(64)
}

#[tokio::test]
async fn ingests_successfully() {
    let h = Harness::new();
    let user = SystemId::new();
    let path_id = h.setup_volume_and_path(user).await;

    let handler = h.ingest_handler();
    let (asset, session) = handler
        .execute(IngestAssetCommand {
            uploader_id: user,
            client_device_id: "iphone-1".into(),
            filename: "photo.jpg".into(),
            checksum: valid_checksum(),
            target_path_id: path_id,
            file_size: 1024,
            data: Bytes::from(vec![0u8; 1024]),
        })
        .await
        .unwrap();

    assert_eq!(asset.mime_type, "image/jpeg");
    assert_eq!(asset.file_size, 1024);
    assert_eq!(asset.owner_user_id, user);
    assert_eq!(session.status, IngestStatus::AwaitingProcessing);
    assert!(!h.event_pub.published().await.is_empty());
}

#[tokio::test]
async fn rejects_quota_exceeded() {
    let h = Harness::new();
    let user = SystemId::new();
    let path_id = h.setup_volume_and_path(user).await;

    let mut quota = QuotaDefinition::new(user);
    quota.add_rule(UsageType::StorageBytes, 500, TimePeriod::Lifetime);
    h.quota_repo.save(&quota).await.unwrap();

    let handler = h.ingest_handler();
    let result = handler
        .execute(IngestAssetCommand {
            uploader_id: user,
            client_device_id: "iphone-1".into(),
            filename: "big.jpg".into(),
            checksum: valid_checksum(),
            target_path_id: path_id,
            file_size: 1024,
            data: Bytes::from(vec![0u8; 1024]),
        })
        .await;

    assert!(matches!(result, Err(DomainError::QuotaExceeded(_))));
}

#[tokio::test]
async fn rejects_invalid_checksum() {
    let h = Harness::new();
    let user = SystemId::new();
    let path_id = h.setup_volume_and_path(user).await;

    let handler = h.ingest_handler();
    let result = handler
        .execute(IngestAssetCommand {
            uploader_id: user,
            client_device_id: "iphone-1".into(),
            filename: "photo.jpg".into(),
            checksum: "tooshort".into(),
            target_path_id: path_id,
            file_size: 1024,
            data: Bytes::from(vec![0u8; 1024]),
        })
        .await;

    assert!(matches!(result, Err(DomainError::Validation(_))));
}

#[tokio::test]
async fn rejects_non_ingest_path() {
    let h = Harness::new();
    let user = SystemId::new();

    // Create volume + non-ingest path directly
    let vol_handler = RegisterVolumeHandler::new(h.vol_repo.clone());
    let vol = vol_handler
        .execute(RegisterVolumeCommand {
            volume_name: "main".into(),
            uri_prefix: "file:///data".into(),
            is_writable: true,
        })
        .await
        .unwrap();

    let path = domain::entities::LibraryPath::new_user_owned(
        vol.volume_id,
        "photos/archive",
        user,
        false, // not an ingest destination
    );
    use domain::ports::LibraryPathRepository;
    h.path_repo.save(&path).await.unwrap();

    let handler = h.ingest_handler();
    let result = handler
        .execute(IngestAssetCommand {
            uploader_id: user,
            client_device_id: "iphone-1".into(),
            filename: "photo.jpg".into(),
            checksum: valid_checksum(),
            target_path_id: path.path_id,
            file_size: 1024,
            data: Bytes::from(vec![0u8; 1024]),
        })
        .await;

    assert!(matches!(result, Err(DomainError::Validation(_))));
}