oximedia-cli 0.1.4

//! Cloud storage CLI commands.
//!
//! Provides commands for uploading, downloading, cloud transcoding,
//! job status, and cost estimation across S3, Azure, and GCS providers.

use anyhow::{Context, Result};
use clap::Subcommand;
use colored::Colorize;
use std::path::PathBuf;

// ---------------------------------------------------------------------------
// Command definitions
// ---------------------------------------------------------------------------

/// Cloud command subcommands.
#[derive(Subcommand, Debug)]
pub enum CloudCommand {
    /// Upload a file to cloud storage
    Upload {
        /// Local input file
        #[arg(short, long)]
        input: PathBuf,

        /// Cloud provider: s3, azure, gcs
        #[arg(long)]
        provider: String,

        /// Bucket or container name
        #[arg(long)]
        bucket: String,

        /// Remote object key (defaults to filename)
        #[arg(long)]
        key: Option<String>,

        /// Cloud region
        #[arg(long)]
        region: Option<String>,

        /// Use multipart upload for large files
        #[arg(long)]
        multipart: bool,

        /// Bandwidth limit in KB/s
        #[arg(long)]
        bandwidth_limit: Option<u32>,
    },

    /// Download a file from cloud storage
    Download {
        /// Cloud provider: s3, azure, gcs
        #[arg(long)]
        provider: String,

        /// Bucket or container name
        #[arg(long)]
        bucket: String,

        /// Remote object key
        #[arg(long)]
        key: String,

        /// Local output file
        #[arg(short, long)]
        output: PathBuf,

        /// Cloud region
        #[arg(long)]
        region: Option<String>,
    },

    /// Submit a cloud transcoding job
    Transcode {
        /// Cloud provider: s3, azure, gcs
        #[arg(long)]
        provider: String,

        /// Bucket or container name
        #[arg(long)]
        bucket: String,

        /// Input object key
        #[arg(long)]
        input_key: String,

        /// Output object key
        #[arg(long)]
        output_key: String,

        /// Transcoding preset (e.g., av1-1080p, vp9-4k)
        #[arg(long)]
        preset: Option<String>,

        /// Cloud region
        #[arg(long)]
        region: Option<String>,
    },

    /// Check a cloud job status
    Status {
        /// Cloud provider: s3, azure, gcs
        #[arg(long)]
        provider: String,

        /// Job identifier
        #[arg(long)]
        job_id: String,

        /// Cloud region
        #[arg(long)]
        region: Option<String>,
    },

    /// Estimate cloud costs
    Cost {
        /// Cloud provider: s3, azure, gcs
        #[arg(long)]
        provider: String,

        /// Storage amount in GB
        #[arg(long)]
        storage_gb: f64,

        /// Egress (data transfer out) in GB
        #[arg(long)]
        egress_gb: Option<f64>,

        /// Transcoding minutes
        #[arg(long)]
        transcode_minutes: Option<f64>,

        /// Cloud region
        #[arg(long)]
        region: Option<String>,
    },
}

// ---------------------------------------------------------------------------
// Cost data
// ---------------------------------------------------------------------------

/// Per-provider pricing constants (approximate USD/month, standard tier).
struct PricingTier {
    storage_per_gb: f64,
    egress_per_gb: f64,
    transcode_per_min: f64,
    name: &'static str,
}

fn pricing_for(provider: &str, region: &str) -> Result<PricingTier> {
    // Simplified pricing model; real implementation would query provider APIs
    let _region = region; // region could vary pricing; here we use defaults
    match provider.to_lowercase().as_str() {
        "s3" | "aws" => Ok(PricingTier {
            storage_per_gb: 0.023,
            egress_per_gb: 0.09,
            transcode_per_min: 0.024,
            name: "AWS S3",
        }),
        "azure" => Ok(PricingTier {
            storage_per_gb: 0.018,
            egress_per_gb: 0.087,
            transcode_per_min: 0.022,
            name: "Azure Blob",
        }),
        "gcs" | "google" => Ok(PricingTier {
            storage_per_gb: 0.020,
            egress_per_gb: 0.12,
            transcode_per_min: 0.025,
            name: "Google Cloud Storage",
        }),
        other => Err(anyhow::anyhow!(
            "Unknown cloud provider '{}'. Supported: s3, azure, gcs",
            other
        )),
    }
}

fn validate_provider(provider: &str) -> Result<()> {
    match provider.to_lowercase().as_str() {
        "s3" | "aws" | "azure" | "gcs" | "google" => Ok(()),
        other => Err(anyhow::anyhow!(
            "Unknown cloud provider '{}'. Supported: s3, azure, gcs",
            other
        )),
    }
}

fn format_provider(provider: &str) -> &str {
    match provider.to_lowercase().as_str() {
        "s3" | "aws" => "AWS S3",
        "azure" => "Azure Blob Storage",
        "gcs" | "google" => "Google Cloud Storage",
        _ => provider,
    }
}

// ---------------------------------------------------------------------------
// Command handler
// ---------------------------------------------------------------------------

/// Handle cloud command dispatch.
pub async fn handle_cloud_command(command: CloudCommand, json_output: bool) -> Result<()> {
    match command {
        CloudCommand::Upload {
            input,
            provider,
            bucket,
            key,
            region,
            multipart,
            bandwidth_limit,
        } => {
            run_upload(
                &input,
                &provider,
                &bucket,
                &key,
                &region,
                multipart,
                bandwidth_limit,
                json_output,
            )
            .await
        }
        CloudCommand::Download {
            provider,
            bucket,
            key,
            output,
            region,
        } => run_download(&provider, &bucket, &key, &output, &region, json_output).await,
        CloudCommand::Transcode {
            provider,
            bucket,
            input_key,
            output_key,
            preset,
            region,
        } => {
            run_transcode(
                &provider,
                &bucket,
                &input_key,
                &output_key,
                &preset,
                &region,
                json_output,
            )
            .await
        }
        CloudCommand::Status {
            provider,
            job_id,
            region,
        } => run_status(&provider, &job_id, &region, json_output).await,
        CloudCommand::Cost {
            provider,
            storage_gb,
            egress_gb,
            transcode_minutes,
            region,
        } => {
            run_cost(
                &provider,
                storage_gb,
                egress_gb,
                transcode_minutes,
                &region,
                json_output,
            )
            .await
        }
    }
}

// ---------------------------------------------------------------------------
// Upload
// ---------------------------------------------------------------------------

async fn run_upload(
    input: &PathBuf,
    provider: &str,
    bucket: &str,
    key: &Option<String>,
    region: &Option<String>,
    multipart: bool,
    bandwidth_limit: Option<u32>,
    json_output: bool,
) -> Result<()> {
    validate_provider(provider)?;

    if !input.exists() {
        return Err(anyhow::anyhow!("Input file not found: {}", input.display()));
    }

    let meta = std::fs::metadata(input).context("Failed to read file metadata")?;
    let remote_key = key.clone().unwrap_or_else(|| {
        input
            .file_name()
            .unwrap_or_default()
            .to_string_lossy()
            .to_string()
    });
    let region_str = region.as_deref().unwrap_or("us-east-1");

    if json_output {
        let result = serde_json::json!({
            "command": "upload",
            "provider": format_provider(provider),
            "bucket": bucket,
            "key": remote_key,
            "region": region_str,
            "size_bytes": meta.len(),
            "multipart": multipart,
            "bandwidth_limit_kbps": bandwidth_limit,
            "status": "ready",
            "message": "Upload configured; cloud credentials required for execution",
        });
        let s = serde_json::to_string_pretty(&result).context("Failed to serialize")?;
        println!("{s}");
    } else {
        println!("{}", "Cloud Upload".green().bold());
        println!("{}", "=".repeat(60));
        println!("{:22} {}", "Provider:", format_provider(provider));
        println!("{:22} {}", "Bucket:", bucket);
        println!("{:22} {}", "Remote key:", remote_key);
        println!("{:22} {}", "Region:", region_str);
        println!("{:22} {}", "Local file:", input.display());
        println!(
            "{:22} {:.2} MB",
            "File size:",
            meta.len() as f64 / (1024.0 * 1024.0)
        );
        println!(
            "{:22} {}",
            "Multipart:",
            if multipart { "enabled" } else { "disabled" }
        );
        if let Some(limit) = bandwidth_limit {
            println!("{:22} {} KB/s", "Bandwidth limit:", limit);
        }
        println!();
        println!(
            "{}",
            "Note: Cloud credentials must be configured for actual upload.".yellow()
        );
        println!(
            "{}",
            "Set environment variables (AWS_ACCESS_KEY_ID, etc.) or use a credentials file."
                .dimmed()
        );
    }

    Ok(())
}

// ---------------------------------------------------------------------------
// Download
// ---------------------------------------------------------------------------

async fn run_download(
    provider: &str,
    bucket: &str,
    key: &str,
    output: &PathBuf,
    region: &Option<String>,
    json_output: bool,
) -> Result<()> {
    validate_provider(provider)?;
    let region_str = region.as_deref().unwrap_or("us-east-1");

    if json_output {
        let result = serde_json::json!({
            "command": "download",
            "provider": format_provider(provider),
            "bucket": bucket,
            "key": key,
            "region": region_str,
            "output": output.display().to_string(),
            "status": "ready",
            "message": "Download configured; cloud credentials required for execution",
        });
        let s = serde_json::to_string_pretty(&result).context("Failed to serialize")?;
        println!("{s}");
    } else {
        println!("{}", "Cloud Download".green().bold());
        println!("{}", "=".repeat(60));
        println!("{:22} {}", "Provider:", format_provider(provider));
        println!("{:22} {}", "Bucket:", bucket);
        println!("{:22} {}", "Remote key:", key);
        println!("{:22} {}", "Region:", region_str);
        println!("{:22} {}", "Output:", output.display());
        println!();
        println!(
            "{}",
            "Note: Cloud credentials must be configured for actual download.".yellow()
        );
    }

    Ok(())
}

// ---------------------------------------------------------------------------
// Transcode
// ---------------------------------------------------------------------------

async fn run_transcode(
    provider: &str,
    bucket: &str,
    input_key: &str,
    output_key: &str,
    preset: &Option<String>,
    region: &Option<String>,
    json_output: bool,
) -> Result<()> {
    validate_provider(provider)?;
    let region_str = region.as_deref().unwrap_or("us-east-1");
    let preset_str = preset.as_deref().unwrap_or("av1-1080p");

    // Generate a synthetic job ID
    let job_id = format!(
        "job-{:08x}",
        std::time::SystemTime::now()
            .duration_since(std::time::UNIX_EPOCH)
            .unwrap_or_default()
            .as_secs()
    );

    if json_output {
        let result = serde_json::json!({
            "command": "transcode",
            "provider": format_provider(provider),
            "bucket": bucket,
            "input_key": input_key,
            "output_key": output_key,
            "preset": preset_str,
            "region": region_str,
            "job_id": job_id,
            "status": "submitted",
            "message": "Transcode job submitted (simulation); cloud API required for real execution",
        });
        let s = serde_json::to_string_pretty(&result).context("Failed to serialize")?;
        println!("{s}");
    } else {
        println!("{}", "Cloud Transcode".green().bold());
        println!("{}", "=".repeat(60));
        println!("{:22} {}", "Provider:", format_provider(provider));
        println!("{:22} {}", "Bucket:", bucket);
        println!("{:22} {}", "Input key:", input_key);
        println!("{:22} {}", "Output key:", output_key);
        println!("{:22} {}", "Preset:", preset_str);
        println!("{:22} {}", "Region:", region_str);
        println!("{:22} {}", "Job ID:", job_id.cyan());
        println!();
        println!(
            "{}",
            "Note: Cloud API credentials are required for actual transcoding.".yellow()
        );
    }

    Ok(())
}

// ---------------------------------------------------------------------------
// Status
// ---------------------------------------------------------------------------

async fn run_status(
    provider: &str,
    job_id: &str,
    region: &Option<String>,
    json_output: bool,
) -> Result<()> {
    validate_provider(provider)?;
    let region_str = region.as_deref().unwrap_or("us-east-1");

    if json_output {
        let result = serde_json::json!({
            "command": "status",
            "provider": format_provider(provider),
            "job_id": job_id,
            "region": region_str,
            "status": "unknown",
            "message": "Job status lookup requires cloud API credentials",
        });
        let s = serde_json::to_string_pretty(&result).context("Failed to serialize")?;
        println!("{s}");
    } else {
        println!("{}", "Cloud Job Status".green().bold());
        println!("{}", "=".repeat(60));
        println!("{:22} {}", "Provider:", format_provider(provider));
        println!("{:22} {}", "Job ID:", job_id);
        println!("{:22} {}", "Region:", region_str);
        println!();
        println!(
            "{}",
            "Note: Cloud API credentials are required for status lookup.".yellow()
        );
    }

    Ok(())
}

// ---------------------------------------------------------------------------
// Cost estimation
// ---------------------------------------------------------------------------

async fn run_cost(
    provider: &str,
    storage_gb: f64,
    egress_gb: Option<f64>,
    transcode_minutes: Option<f64>,
    region: &Option<String>,
    json_output: bool,
) -> Result<()> {
    let region_str = region.as_deref().unwrap_or("us-east-1");
    let pricing = pricing_for(provider, region_str)?;

    let egress = egress_gb.unwrap_or(0.0);
    let transcode = transcode_minutes.unwrap_or(0.0);

    let storage_cost = storage_gb * pricing.storage_per_gb;
    let egress_cost = egress * pricing.egress_per_gb;
    let transcode_cost = transcode * pricing.transcode_per_min;
    let total_cost = storage_cost + egress_cost + transcode_cost;

    if json_output {
        let result = serde_json::json!({
            "command": "cost",
            "provider": pricing.name,
            "region": region_str,
            "storage_gb": storage_gb,
            "egress_gb": egress,
            "transcode_minutes": transcode,
            "storage_cost_usd": format!("{:.4}", storage_cost),
            "egress_cost_usd": format!("{:.4}", egress_cost),
            "transcode_cost_usd": format!("{:.4}", transcode_cost),
            "total_cost_usd": format!("{:.4}", total_cost),
            "currency": "USD",
            "note": "Estimates based on standard tier pricing",
        });
        let s = serde_json::to_string_pretty(&result).context("Failed to serialize")?;
        println!("{s}");
    } else {
        println!("{}", "Cloud Cost Estimate".green().bold());
        println!("{}", "=".repeat(60));
        println!("{:22} {}", "Provider:", pricing.name);
        println!("{:22} {}", "Region:", region_str);
        println!();
        println!("{}", "Usage".cyan().bold());
        println!("{}", "-".repeat(60));
        println!("{:22} {:.2} GB", "Storage:", storage_gb);
        println!("{:22} {:.2} GB", "Egress:", egress);
        println!("{:22} {:.1} min", "Transcode:", transcode);
        println!();
        println!("{}", "Cost Breakdown (USD/month)".cyan().bold());
        println!("{}", "-".repeat(60));
        println!(
            "{:22} ${:.4}  (${:.4}/GB)",
            "Storage:", storage_cost, pricing.storage_per_gb
        );
        println!(
            "{:22} ${:.4}  (${:.4}/GB)",
            "Egress:", egress_cost, pricing.egress_per_gb
        );
        println!(
            "{:22} ${:.4}  (${:.4}/min)",
            "Transcode:", transcode_cost, pricing.transcode_per_min
        );
        println!("{}", "-".repeat(60));
        println!(
            "{:22} {}",
            "TOTAL:",
            format!("${:.4}", total_cost).green().bold()
        );
        println!();
        println!(
            "{}",
            "Note: Estimates based on standard tier pricing. Actual costs may vary.".dimmed()
        );
    }

    Ok(())
}

// ---------------------------------------------------------------------------
// Tests
// ---------------------------------------------------------------------------

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

    #[test]
    fn test_validate_provider_known() {
        assert!(validate_provider("s3").is_ok());
        assert!(validate_provider("azure").is_ok());
        assert!(validate_provider("gcs").is_ok());
        assert!(validate_provider("aws").is_ok());
        assert!(validate_provider("google").is_ok());
    }

    #[test]
    fn test_validate_provider_unknown() {
        assert!(validate_provider("dropbox").is_err());
        assert!(validate_provider("").is_err());
    }

    #[test]
    fn test_pricing_s3() {
        let p = pricing_for("s3", "us-east-1");
        assert!(p.is_ok());
        let p = p.expect("should succeed");
        assert!(p.storage_per_gb > 0.0);
        assert!(p.egress_per_gb > 0.0);
        assert!(p.transcode_per_min > 0.0);
    }

    #[test]
    fn test_pricing_unknown() {
        let p = pricing_for("dropbox", "us-east-1");
        assert!(p.is_err());
    }

    #[test]
    fn test_cost_calculation() {
        let p = pricing_for("s3", "us-east-1").expect("should succeed");
        let storage_cost = 100.0 * p.storage_per_gb;
        let egress_cost = 50.0 * p.egress_per_gb;
        let transcode_cost = 120.0 * p.transcode_per_min;
        let total = storage_cost + egress_cost + transcode_cost;
        assert!(total > 0.0);
        // Sanity: 100GB S3 + 50GB egress + 120min transcode should be > $5
        assert!(total > 5.0);
    }
}