// Licensed to the Apache Software Foundation (ASF) under one
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// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

//! Integration tests for FileIO Google Cloud Storage (GCS).

use std::collections::HashMap;
use std::net::SocketAddr;
use std::sync::RwLock;

use bytes::Bytes;
use ctor::{ctor, dtor};
use iceberg::io::{FileIO, FileIOBuilder, GCS_NO_AUTH, GCS_SERVICE_PATH};
use iceberg_test_utils::docker::DockerCompose;
use iceberg_test_utils::{normalize_test_name, set_up};

static DOCKER_COMPOSE_ENV: RwLock<Option<DockerCompose>> = RwLock::new(None);
static FAKE_GCS_PORT: u16 = 4443;
static FAKE_GCS_BUCKET: &str = "test-bucket";

#[ctor]
fn before_all() {
    let mut guard = DOCKER_COMPOSE_ENV.write().unwrap();
    let docker_compose = DockerCompose::new(
        normalize_test_name(module_path!()),
        format!("{}/testdata/file_io_gcs", env!("CARGO_MANIFEST_DIR")),
    );
    docker_compose.run();
    guard.replace(docker_compose);
}

#[dtor]
fn after_all() {
    let mut guard = DOCKER_COMPOSE_ENV.write().unwrap();
    guard.take();
}

async fn get_file_io_gcs() -> FileIO {
    set_up();

    let ip = DOCKER_COMPOSE_ENV
        .read()
        .unwrap()
        .as_ref()
        .unwrap()
        .get_container_ip("gcs-server");
    let addr = SocketAddr::new(ip, FAKE_GCS_PORT);

    // A bucket must exist for FileIO
    create_bucket(FAKE_GCS_BUCKET, addr.to_string())
        .await
        .unwrap();

    FileIOBuilder::new("gcs")
        .with_props(vec![
            (GCS_SERVICE_PATH, format!("http://{}", addr)),
            (GCS_NO_AUTH, "true".to_string()),
        ])
        .build()
        .unwrap()
}

// Create a bucket against the emulated GCS storage server.
async fn create_bucket(name: &str, server_addr: String) -> anyhow::Result<()> {
    let mut bucket_data = HashMap::new();
    bucket_data.insert("name", name);

    let client = reqwest::Client::new();
    let endpoint = format!("http://{}/storage/v1/b", server_addr);
    client.post(endpoint).json(&bucket_data).send().await?;
    Ok(())
}

fn get_gs_path() -> String {
    format!("gs://{}", FAKE_GCS_BUCKET)
}

#[tokio::test]
async fn gcs_exists() {
    let file_io = get_file_io_gcs().await;
    assert!(file_io
        .is_exist(format!("{}/", get_gs_path()))
        .await
        .unwrap());
}

#[tokio::test]
async fn gcs_write() {
    let gs_file = format!("{}/write-file", get_gs_path());
    let file_io = get_file_io_gcs().await;
    let output = file_io.new_output(&gs_file).unwrap();
    output
        .write(bytes::Bytes::from_static(b"iceberg-gcs!"))
        .await
        .expect("Write to test output file");
    assert!(file_io.is_exist(gs_file).await.unwrap())
}

#[tokio::test]
async fn gcs_read() {
    let gs_file = format!("{}/read-gcs", get_gs_path());
    let file_io = get_file_io_gcs().await;
    let output = file_io.new_output(&gs_file).unwrap();
    output
        .write(bytes::Bytes::from_static(b"iceberg!"))
        .await
        .expect("Write to test output file");
    assert!(file_io.is_exist(&gs_file).await.unwrap());

    let input = file_io.new_input(gs_file).unwrap();
    assert_eq!(input.read().await.unwrap(), Bytes::from_static(b"iceberg!"));
}