s7cmd 0.1.1

//! Shared test helpers.
//!
//! Two layers:
//!
//! 1. **Always-available** — `s7cmd_cmd`, `run`, `create_temp_dir`,
//!    `create_test_file`, `generate_bucket_name`, `PROFILE_NAME`. Used by
//!    every test file (including the non-AWS `cli_arg_validation.rs`).
//!
//! 2. **`cfg(e2e_test)`-gated** — `TestHelper` plus `REGION`. Used only by
//!    the `e2e_*.rs` files. Default `cargo test` does not compile or load
//!    these, so it never tries to construct an AWS SDK client.

#![allow(dead_code)] // helpers are pulled in à la carte by each test file

use std::path::{Path, PathBuf};
use std::process::{Command, Stdio};

// === Always-available constants and helpers ===

/// AWS profile prepared by the maintainer. All e2e tests authenticate
/// through this profile.
pub const PROFILE_NAME: &str = "s7cmd-e2e-test";

/// Build a `Command` pointing at the freshly-built `s7cmd` binary with
/// stdin closed and stdout/stderr piped — the standard shape for assertion
/// capture. Tests can chain `.args(...)` / `.env_remove(...)` as needed.
pub fn s7cmd_cmd() -> Command {
    let mut cmd = Command::new(env!("CARGO_BIN_EXE_s7cmd"));
    cmd.stdin(Stdio::null())
        .stdout(Stdio::piped())
        .stderr(Stdio::piped());
    cmd
}

/// Run a prepared command and return `(exit_code, stdout, stderr)`.
/// Both stdout and stderr are surfaced so failing assertions can include
/// the full child output.
pub fn run(cmd: &mut Command) -> (Option<i32>, String, String) {
    let output = cmd.output().expect("failed to spawn s7cmd binary");
    (
        output.status.code(),
        String::from_utf8_lossy(&output.stdout).to_string(),
        String::from_utf8_lossy(&output.stderr).to_string(),
    )
}

/// UUID-suffixed bucket name. Globally unique so parallel test runs do not
/// collide and so leftover buckets from prior runs are easy to identify.
pub fn generate_bucket_name() -> String {
    format!("s7cmd-e2e-{}", uuid::Uuid::new_v4())
}

/// Per-test temp directory under `./playground/`. The parent is gitignored.
pub fn create_temp_dir() -> PathBuf {
    let dir = PathBuf::from(format!("./playground/tmp_{}", uuid::Uuid::new_v4()));
    std::fs::create_dir_all(&dir).expect("create_temp_dir");
    dir
}

/// Write `body` to `dir/name` and return the full path.
pub fn create_test_file(dir: &Path, name: &str, body: &[u8]) -> PathBuf {
    let path = dir.join(name);
    std::fs::write(&path, body).expect("create_test_file");
    path
}

/// Create a zero-filled file of `size` bytes — used by the Ctrl+C tests
/// to make a transfer last long enough for SIGINT to land mid-stream.
pub fn create_sized_file(dir: &Path, name: &str, size: usize) -> PathBuf {
    let path = dir.join(name);
    std::fs::write(&path, vec![0u8; size]).expect("create_sized_file");
    path
}

// === e2e_test-gated SDK helpers ===

// Re-exported for use by tests/e2e_*.rs files. Test crates that don't
// consume them (e.g. cli_arg_validation.rs uses only s7cmd_cmd/run) make
// these re-exports look unused inside that crate's compilation, so suppress
// the false-positive locally.
#[cfg(e2e_test)]
#[allow(unused_imports)]
pub use e2e::{REGION, TestHelper};

#[cfg(e2e_test)]
mod e2e {
    use super::PROFILE_NAME;

    use aws_config::BehaviorVersion;
    use aws_config::meta::region::{ProvideRegion, RegionProviderChain};
    use aws_sdk_s3::Client;
    use aws_sdk_s3::config::Region;
    use aws_sdk_s3::types::{
        BucketLocationConstraint, BucketVersioningStatus, CreateBucketConfiguration, Tag, Tagging,
        VersioningConfiguration,
    };

    /// Default region. Overridable at runtime (not compile time) via the
    /// `S7CMD_E2E_REGION` environment variable, so a single binary can be
    /// pointed at different accounts/regions without recompiling.
    pub const REGION: &str = "ap-northeast-1";

    pub struct TestHelper {
        pub client: Client,
    }

    impl TestHelper {
        pub async fn new() -> Self {
            Self {
                client: Self::create_client().await,
            }
        }

        async fn create_client() -> Client {
            let cfg = aws_config::defaults(BehaviorVersion::latest())
                .credentials_provider(
                    aws_config::profile::ProfileFileCredentialsProvider::builder()
                        .profile_name(PROFILE_NAME)
                        .build(),
                )
                .region(Self::region_provider())
                .load()
                .await;
            Client::new(&cfg)
        }

        fn region_provider() -> Box<dyn ProvideRegion> {
            // Order: $S7CMD_E2E_REGION > profile region > REGION constant.
            let env_region = std::env::var("S7CMD_E2E_REGION").ok().map(Region::new);
            let profile_region = aws_config::profile::ProfileFileRegionProvider::builder()
                .profile_name(PROFILE_NAME)
                .build();
            let chain = RegionProviderChain::first_try(env_region)
                .or_else(profile_region)
                .or_else(REGION);
            Box::new(chain)
        }

        // ---- Bucket lifecycle ----

        pub async fn create_bucket(&self, bucket: &str, region: &str) {
            let constraint = BucketLocationConstraint::from(region);
            let cfg = CreateBucketConfiguration::builder()
                .location_constraint(constraint)
                .build();
            self.client
                .create_bucket()
                .create_bucket_configuration(cfg)
                .bucket(bucket)
                .send()
                .await
                .expect("create_bucket");
        }

        pub async fn is_bucket_exist(&self, bucket: &str) -> bool {
            let head = self.client.head_bucket().bucket(bucket).send().await;
            match head {
                Ok(_) => true,
                Err(e) => !e.into_service_error().is_not_found(),
            }
        }

        /// Empty the bucket (objects + versions + delete-markers) and then
        /// delete it. Idempotent on already-gone buckets so cleanup is
        /// safe to call multiple times.
        pub async fn delete_bucket_with_cascade(&self, bucket: &str) {
            if !self.is_bucket_exist(bucket).await {
                return;
            }
            self.delete_all_objects(bucket).await;
            self.delete_all_object_versions(bucket).await;
            let _ = self.client.delete_bucket().bucket(bucket).send().await;
        }

        // ---- Object lifecycle ----

        pub async fn put_object(&self, bucket: &str, key: &str, body: Vec<u8>) {
            self.client
                .put_object()
                .bucket(bucket)
                .key(key)
                .body(body.into())
                .send()
                .await
                .expect("put_object");
        }

        /// PutObject and return the assigned `VersionId`. The bucket must
        /// have versioning enabled, otherwise S3 returns `null` or no value.
        pub async fn put_object_returning_version_id(
            &self,
            bucket: &str,
            key: &str,
            body: Vec<u8>,
        ) -> String {
            let out = self
                .client
                .put_object()
                .bucket(bucket)
                .key(key)
                .body(body.into())
                .send()
                .await
                .expect("put_object");
            out.version_id()
                .expect("PutObject must return VersionId on a versioned bucket")
                .to_string()
        }

        pub async fn is_object_exist(
            &self,
            bucket: &str,
            key: &str,
            version_id: Option<String>,
        ) -> bool {
            let req = self
                .client
                .head_object()
                .bucket(bucket)
                .key(key)
                .set_version_id(version_id);
            match req.send().await {
                Ok(_) => true,
                Err(e) => !e.into_service_error().is_not_found(),
            }
        }

        pub async fn delete_object(&self, bucket: &str, key: &str, version_id: Option<String>) {
            self.client
                .delete_object()
                .bucket(bucket)
                .key(key)
                .set_version_id(version_id)
                .send()
                .await
                .expect("delete_object");
        }

        pub async fn delete_all_objects(&self, bucket: &str) {
            let Ok(list) = self.client.list_objects_v2().bucket(bucket).send().await else {
                return;
            };
            for obj in list.contents() {
                if let Some(key) = obj.key() {
                    self.delete_object(bucket, key, None).await;
                }
            }
        }

        /// Delete every non-current version and delete-marker. Versioning
        /// not enabled / list unsupported (e.g. directory bucket) → no-op.
        pub async fn delete_all_object_versions(&self, bucket: &str) {
            let Ok(out) = self
                .client
                .list_object_versions()
                .bucket(bucket)
                .send()
                .await
            else {
                return;
            };
            for v in out.versions() {
                if let Some(key) = v.key() {
                    self.delete_object(bucket, key, v.version_id().map(str::to_string))
                        .await;
                }
            }
            for m in out.delete_markers() {
                if let Some(key) = m.key() {
                    self.delete_object(bucket, key, m.version_id().map(str::to_string))
                        .await;
                }
            }
        }

        // ---- Seeding helpers (set state that get-*/delete-* tests read) ----

        pub async fn put_object_tagging(&self, bucket: &str, key: &str, tags: &[(&str, &str)]) {
            let tag_set: Vec<Tag> = tags
                .iter()
                .map(|(k, v)| Tag::builder().key(*k).value(*v).build().unwrap())
                .collect();
            let tagging = Tagging::builder()
                .set_tag_set(Some(tag_set))
                .build()
                .unwrap();
            self.client
                .put_object_tagging()
                .bucket(bucket)
                .key(key)
                .tagging(tagging)
                .send()
                .await
                .expect("put_object_tagging");
        }

        pub async fn put_bucket_tagging(&self, bucket: &str, tags: &[(&str, &str)]) {
            let tag_set: Vec<Tag> = tags
                .iter()
                .map(|(k, v)| Tag::builder().key(*k).value(*v).build().unwrap())
                .collect();
            let tagging = Tagging::builder()
                .set_tag_set(Some(tag_set))
                .build()
                .unwrap();
            self.client
                .put_bucket_tagging()
                .bucket(bucket)
                .tagging(tagging)
                .send()
                .await
                .expect("put_bucket_tagging");
        }

        pub async fn put_bucket_policy(&self, bucket: &str, policy_json: &str) {
            self.client
                .put_bucket_policy()
                .bucket(bucket)
                .policy(policy_json)
                .send()
                .await
                .expect("put_bucket_policy");
        }

        pub async fn enable_bucket_versioning(&self, bucket: &str) {
            let cfg = VersioningConfiguration::builder()
                .status(BucketVersioningStatus::Enabled)
                .build();
            self.client
                .put_bucket_versioning()
                .bucket(bucket)
                .versioning_configuration(cfg)
                .send()
                .await
                .expect("enable_bucket_versioning");
        }

        // ---- Multipart cleanup (Ctrl+C tests for cp/mv) ----

        pub async fn abort_all_multipart_uploads(&self, bucket: &str) {
            let Ok(list) = self
                .client
                .list_multipart_uploads()
                .bucket(bucket)
                .send()
                .await
            else {
                return;
            };
            for upload in list.uploads() {
                if let (Some(key), Some(upload_id)) = (upload.key(), upload.upload_id()) {
                    let _ = self
                        .client
                        .abort_multipart_upload()
                        .bucket(bucket)
                        .key(key)
                        .upload_id(upload_id)
                        .send()
                        .await;
                }
            }
        }
    }
}