oxigdal-bench 0.1.4

//! Cloud storage benchmark scenarios.
//!
//! This module provides benchmark scenarios for cloud storage operations including:
//! - S3 read/write performance
//! - GCS operations
//! - Azure Blob Storage
//! - Caching strategies
//! - Prefetching performance
//! - Range request optimization

use crate::error::{BenchError, Result};
use crate::scenarios::BenchmarkScenario;
use std::path::PathBuf;

/// Cloud storage provider types.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum CloudProvider {
    /// Amazon S3.
    S3,
    /// Google Cloud Storage.
    Gcs,
    /// Azure Blob Storage.
    Azure,
}

/// S3 read benchmark scenario.
pub struct S3ReadScenario {
    bucket: String,
    key: String,
    #[allow(dead_code)]
    region: String,
    range_requests: bool,
    chunk_size: Option<usize>,
}

impl S3ReadScenario {
    /// Creates a new S3 read benchmark scenario.
    pub fn new<S1, S2, S3>(bucket: S1, key: S2, region: S3) -> Self
    where
        S1: Into<String>,
        S2: Into<String>,
        S3: Into<String>,
    {
        Self {
            bucket: bucket.into(),
            key: key.into(),
            region: region.into(),
            range_requests: false,
            chunk_size: None,
        }
    }

    /// Enables range requests with specified chunk size.
    pub fn with_range_requests(mut self, chunk_size: usize) -> Self {
        self.range_requests = true;
        self.chunk_size = Some(chunk_size);
        self
    }
}

impl BenchmarkScenario for S3ReadScenario {
    fn name(&self) -> &str {
        "s3_read"
    }

    fn description(&self) -> &str {
        "Benchmark S3 object read performance"
    }

    fn setup(&mut self) -> Result<()> {
        // Validate configuration
        if self.bucket.is_empty() {
            return Err(BenchError::InvalidConfiguration(
                "Bucket name cannot be empty".to_string(),
            ));
        }

        if self.key.is_empty() {
            return Err(BenchError::InvalidConfiguration(
                "Object key cannot be empty".to_string(),
            ));
        }

        Ok(())
    }

    fn execute(&mut self) -> Result<()> {
        #[cfg(feature = "cloud")]
        {
            // Placeholder for actual S3 implementation
            // use oxigdal_cloud::s3::S3Client;

            // let client = S3Client::new(&self.region)?;

            // if self.range_requests {
            //     let chunk_size = self.chunk_size.unwrap_or(8 * 1024 * 1024);
            //     // Read in chunks using range requests
            //     // let metadata = client.head_object(&self.bucket, &self.key)?;
            //     // let size = metadata.content_length;
            //     // let mut offset = 0;
            //     // while offset < size {
            //     //     let end = (offset + chunk_size as u64).min(size);
            //     //     let data = client.get_object_range(&self.bucket, &self.key, offset, end)?;
            //     //     offset = end;
            //     // }
            // } else {
            //     // Read entire object
            //     // let data = client.get_object(&self.bucket, &self.key)?;
            // }
        }

        #[cfg(not(feature = "cloud"))]
        {
            return Err(BenchError::missing_dependency("oxigdal-cloud", "cloud"));
        }

        Ok(())
    }

    fn teardown(&mut self) -> Result<()> {
        Ok(())
    }
}

/// S3 write benchmark scenario.
pub struct S3WriteScenario {
    bucket: String,
    key: String,
    #[allow(dead_code)]
    region: String,
    #[allow(dead_code)]
    data_size: usize,
    multipart: bool,
    part_size: Option<usize>,
    cleanup: bool,
}

impl S3WriteScenario {
    /// Creates a new S3 write benchmark scenario.
    pub fn new<S1, S2, S3>(bucket: S1, key: S2, region: S3, data_size: usize) -> Self
    where
        S1: Into<String>,
        S2: Into<String>,
        S3: Into<String>,
    {
        Self {
            bucket: bucket.into(),
            key: key.into(),
            region: region.into(),
            data_size,
            multipart: false,
            part_size: None,
            cleanup: true,
        }
    }

    /// Enables multipart upload with specified part size.
    pub fn with_multipart(mut self, part_size: usize) -> Self {
        self.multipart = true;
        self.part_size = Some(part_size);
        self
    }

    /// Sets whether to cleanup the uploaded object after benchmark.
    pub fn with_cleanup(mut self, cleanup: bool) -> Self {
        self.cleanup = cleanup;
        self
    }
}

impl BenchmarkScenario for S3WriteScenario {
    fn name(&self) -> &str {
        "s3_write"
    }

    fn description(&self) -> &str {
        "Benchmark S3 object write performance"
    }

    fn setup(&mut self) -> Result<()> {
        if self.bucket.is_empty() {
            return Err(BenchError::InvalidConfiguration(
                "Bucket name cannot be empty".to_string(),
            ));
        }

        if self.key.is_empty() {
            return Err(BenchError::InvalidConfiguration(
                "Object key cannot be empty".to_string(),
            ));
        }

        Ok(())
    }

    fn execute(&mut self) -> Result<()> {
        #[cfg(feature = "cloud")]
        {
            // Placeholder for actual S3 implementation
            // let client = S3Client::new(&self.region)?;
            // let data = vec![0u8; self.data_size];

            // if self.multipart {
            //     let part_size = self.part_size.unwrap_or(5 * 1024 * 1024);
            //     // Multipart upload
            //     // let upload_id = client.create_multipart_upload(&self.bucket, &self.key)?;
            //     // let mut parts = Vec::new();
            //     // let mut offset = 0;
            //     // let mut part_number = 1;
            //     // while offset < data.len() {
            //     //     let end = (offset + part_size).min(data.len());
            //     //     let part = client.upload_part(
            //     //         &self.bucket,
            //     //         &self.key,
            //     //         &upload_id,
            //     //         part_number,
            //     //         &data[offset..end],
            //     //     )?;
            //     //     parts.push(part);
            //     //     offset = end;
            //     //     part_number += 1;
            //     // }
            //     // client.complete_multipart_upload(&self.bucket, &self.key, &upload_id, parts)?;
            // } else {
            //     // Single PUT
            //     // client.put_object(&self.bucket, &self.key, &data)?;
            // }
        }

        #[cfg(not(feature = "cloud"))]
        {
            return Err(BenchError::missing_dependency("oxigdal-cloud", "cloud"));
        }

        Ok(())
    }

    fn teardown(&mut self) -> Result<()> {
        #[cfg(feature = "cloud")]
        {
            if self.cleanup {
                // Delete the uploaded object
                // let client = S3Client::new(&self.region)?;
                // client.delete_object(&self.bucket, &self.key)?;
            }
        }

        Ok(())
    }
}

/// Cloud caching benchmark scenario.
pub struct CachingScenario {
    #[allow(dead_code)]
    provider: CloudProvider,
    #[allow(dead_code)]
    bucket: String,
    #[allow(dead_code)]
    key: String,
    cache_dir: PathBuf,
    cache_size_mb: usize,
    access_pattern: CacheAccessPattern,
}

/// Cache access patterns.
#[derive(Debug, Clone, Copy)]
pub enum CacheAccessPattern {
    /// Sequential access (cache hit expected after first read).
    Sequential,
    /// Random access (variable cache hit rate).
    Random,
    /// Repeated access (high cache hit rate expected).
    Repeated,
}

impl CachingScenario {
    /// Creates a new caching benchmark scenario.
    pub fn new<S1, S2, P>(provider: CloudProvider, bucket: S1, key: S2, cache_dir: P) -> Self
    where
        S1: Into<String>,
        S2: Into<String>,
        P: Into<PathBuf>,
    {
        Self {
            provider,
            bucket: bucket.into(),
            key: key.into(),
            cache_dir: cache_dir.into(),
            cache_size_mb: 100,
            access_pattern: CacheAccessPattern::Sequential,
        }
    }

    /// Sets the cache size in megabytes.
    pub fn with_cache_size(mut self, size_mb: usize) -> Self {
        self.cache_size_mb = size_mb;
        self
    }

    /// Sets the access pattern.
    pub fn with_access_pattern(mut self, pattern: CacheAccessPattern) -> Self {
        self.access_pattern = pattern;
        self
    }
}

impl BenchmarkScenario for CachingScenario {
    fn name(&self) -> &str {
        "cloud_caching"
    }

    fn description(&self) -> &str {
        "Benchmark cloud storage caching performance"
    }

    fn setup(&mut self) -> Result<()> {
        std::fs::create_dir_all(&self.cache_dir)?;
        Ok(())
    }

    fn execute(&mut self) -> Result<()> {
        #[cfg(feature = "cloud")]
        {
            // Placeholder for caching benchmark
            // let cache = CloudCache::new(&self.cache_dir, self.cache_size_mb * 1024 * 1024)?;

            // Perform multiple accesses based on pattern
            // match self.access_pattern {
            //     CacheAccessPattern::Sequential => {
            //         for _ in 0..10 {
            //             let data = cache.get_or_fetch(&self.bucket, &self.key)?;
            //         }
            //     }
            //     CacheAccessPattern::Random => {
            //         // Access different byte ranges
            //     }
            //     CacheAccessPattern::Repeated => {
            //         // Access same ranges repeatedly
            //     }
            // }
        }

        #[cfg(not(feature = "cloud"))]
        {
            return Err(BenchError::missing_dependency("oxigdal-cloud", "cloud"));
        }

        Ok(())
    }

    fn teardown(&mut self) -> Result<()> {
        // Clean up cache directory
        if self.cache_dir.exists() {
            let _ = std::fs::remove_dir_all(&self.cache_dir);
        }
        Ok(())
    }
}

/// Prefetch benchmark scenario.
pub struct PrefetchScenario {
    #[allow(dead_code)]
    provider: CloudProvider,
    #[allow(dead_code)]
    bucket: String,
    keys: Vec<String>,
    prefetch_count: usize,
    parallel_requests: usize,
}

impl PrefetchScenario {
    /// Creates a new prefetch benchmark scenario.
    pub fn new<S>(provider: CloudProvider, bucket: S, keys: Vec<String>) -> Self
    where
        S: Into<String>,
    {
        Self {
            provider,
            bucket: bucket.into(),
            keys,
            prefetch_count: 5,
            parallel_requests: 4,
        }
    }

    /// Sets the number of objects to prefetch.
    pub fn with_prefetch_count(mut self, count: usize) -> Self {
        self.prefetch_count = count;
        self
    }

    /// Sets the number of parallel requests.
    pub fn with_parallel_requests(mut self, count: usize) -> Self {
        self.parallel_requests = count;
        self
    }
}

impl BenchmarkScenario for PrefetchScenario {
    fn name(&self) -> &str {
        "cloud_prefetch"
    }

    fn description(&self) -> &str {
        "Benchmark cloud storage prefetch performance"
    }

    fn setup(&mut self) -> Result<()> {
        if self.keys.is_empty() {
            return Err(BenchError::InvalidConfiguration(
                "No keys provided for prefetch benchmark".to_string(),
            ));
        }

        Ok(())
    }

    fn execute(&mut self) -> Result<()> {
        #[cfg(feature = "cloud")]
        {
            // Placeholder for prefetch benchmark
            // let prefetcher = CloudPrefetcher::new(self.parallel_requests);

            // for key in &self.keys {
            //     prefetcher.prefetch(&self.bucket, key)?;
            // }

            // Wait for prefetch to complete
            // prefetcher.wait()?;
        }

        #[cfg(not(feature = "cloud"))]
        {
            return Err(BenchError::missing_dependency("oxigdal-cloud", "cloud"));
        }

        Ok(())
    }

    fn teardown(&mut self) -> Result<()> {
        Ok(())
    }
}

/// Range request optimization benchmark scenario.
pub struct RangeRequestScenario {
    #[allow(dead_code)]
    provider: CloudProvider,
    #[allow(dead_code)]
    bucket: String,
    #[allow(dead_code)]
    key: String,
    range_sizes: Vec<usize>,
}

impl RangeRequestScenario {
    /// Creates a new range request benchmark scenario.
    pub fn new<S1, S2>(provider: CloudProvider, bucket: S1, key: S2) -> Self
    where
        S1: Into<String>,
        S2: Into<String>,
    {
        Self {
            provider,
            bucket: bucket.into(),
            key: key.into(),
            range_sizes: vec![
                64 * 1024,       // 64 KB
                256 * 1024,      // 256 KB
                1024 * 1024,     // 1 MB
                4 * 1024 * 1024, // 4 MB
            ],
        }
    }

    /// Sets the range sizes to benchmark.
    pub fn with_range_sizes(mut self, sizes: Vec<usize>) -> Self {
        self.range_sizes = sizes;
        self
    }
}

impl BenchmarkScenario for RangeRequestScenario {
    fn name(&self) -> &str {
        "range_requests"
    }

    fn description(&self) -> &str {
        "Benchmark different range request sizes"
    }

    fn setup(&mut self) -> Result<()> {
        Ok(())
    }

    fn execute(&mut self) -> Result<()> {
        #[cfg(feature = "cloud")]
        {
            // Placeholder for range request benchmark
            // let client = create_client(self.provider, &self.region)?;

            // for &range_size in &self.range_sizes {
            //     let mut offset = 0u64;
            //     for _ in 0..10 {
            //         let end = offset + range_size as u64;
            //         let data = client.get_object_range(&self.bucket, &self.key, offset, end)?;
            //         offset = end;
            //     }
            // }
        }

        #[cfg(not(feature = "cloud"))]
        {
            return Err(BenchError::missing_dependency("oxigdal-cloud", "cloud"));
        }

        Ok(())
    }

    fn teardown(&mut self) -> Result<()> {
        Ok(())
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_s3_read_scenario_creation() {
        let scenario = S3ReadScenario::new("my-bucket", "test.tif", "us-east-1")
            .with_range_requests(1024 * 1024);

        assert_eq!(scenario.name(), "s3_read");
        assert!(scenario.range_requests);
        assert_eq!(scenario.chunk_size, Some(1024 * 1024));
    }

    #[test]
    fn test_s3_write_scenario_creation() {
        let scenario =
            S3WriteScenario::new("my-bucket", "output.tif", "us-east-1", 10 * 1024 * 1024)
                .with_multipart(5 * 1024 * 1024)
                .with_cleanup(false);

        assert_eq!(scenario.name(), "s3_write");
        assert!(scenario.multipart);
        assert!(!scenario.cleanup);
    }

    #[test]
    fn test_caching_scenario_creation() {
        let scenario =
            CachingScenario::new(CloudProvider::S3, "my-bucket", "test.tif", "/tmp/cache")
                .with_cache_size(200)
                .with_access_pattern(CacheAccessPattern::Random);

        assert_eq!(scenario.name(), "cloud_caching");
        assert_eq!(scenario.cache_size_mb, 200);
    }

    #[test]
    fn test_prefetch_scenario_creation() {
        let keys = vec!["file1.tif".to_string(), "file2.tif".to_string()];
        let scenario = PrefetchScenario::new(CloudProvider::S3, "my-bucket", keys)
            .with_prefetch_count(10)
            .with_parallel_requests(8);

        assert_eq!(scenario.name(), "cloud_prefetch");
        assert_eq!(scenario.prefetch_count, 10);
        assert_eq!(scenario.parallel_requests, 8);
    }

    #[test]
    fn test_range_request_scenario_creation() {
        let scenario = RangeRequestScenario::new(CloudProvider::S3, "my-bucket", "test.tif")
            .with_range_sizes(vec![128 * 1024, 512 * 1024]);

        assert_eq!(scenario.name(), "range_requests");
        assert_eq!(scenario.range_sizes.len(), 2);
    }
}