#!/usr/bin/env herodo
//! QCOW2 Advanced Snapshot Management
//! Demonstrates advanced snapshot operations and disk management strategies

// Example 1: Snapshot-based development workflow
let dev_disk = qcow2_create("/var/lib/vms/dev.qcow2", 30);

// Create base snapshot
qcow2_snapshot_create("/var/lib/vms/dev.qcow2", "base-os");

// Install development tools
// ... (via VM provisioning)

qcow2_snapshot_create("/var/lib/vms/dev.qcow2", "dev-tools");

// Install application dependencies
// ... (via VM provisioning)

qcow2_snapshot_create("/var/lib/vms/dev.qcow2", "app-ready");

// Example 2: Testing workflow with snapshots
let test_disk = qcow2_create("/var/lib/vms/test.qcow2", 50);

qcow2_snapshot_create("/var/lib/vms/test.qcow2", "pre-test");
// Run tests...
qcow2_snapshot_create("/var/lib/vms/test.qcow2", "test-results-v1");
// Run more tests...
qcow2_snapshot_create("/var/lib/vms/test.qcow2", "test-results-v2");

// Example 3: Production deployment snapshots
let prod_disk = qcow2_create("/var/lib/vms/production.qcow2", 200);

// Create snapshots at each deployment stage
qcow2_snapshot_create("/var/lib/vms/production.qcow2", "pre-production");
qcow2_snapshot_create("/var/lib/vms/production.qcow2", "canary-deployment");
qcow2_snapshot_create("/var/lib/vms/production.qcow2", "full-production");

// Example 4: Daily backup snapshots
let backup_disk = qcow2_create("/var/lib/vms/backup.qcow2", 100);

let days = ["monday", "tuesday", "wednesday", "thursday", "friday", "saturday", "sunday"];
for day in days {
    let snapshot_name = "backup-" + day;
    qcow2_snapshot_create("/var/lib/vms/backup.qcow2", snapshot_name);
}

// Example 5: Hourly incremental snapshots
let hourly_disk = qcow2_create("/var/lib/vms/hourly-backup.qcow2", 50);

for hour in range(0, 24) {
    let hour_str = if hour < 10 { "0" + hour } else { hour };
    let snapshot_name = "hourly-" + hour_str + ":00";
    qcow2_snapshot_create("/var/lib/vms/hourly-backup.qcow2", snapshot_name);
}

// Example 6: Release version snapshots
let release_disk = qcow2_create("/var/lib/vms/release.qcow2", 100);

let versions = ["v1.0.0", "v1.1.0", "v1.2.0", "v2.0.0", "v2.1.0"];
for version in versions {
    qcow2_snapshot_create("/var/lib/vms/release.qcow2", "release-" + version);
}

// Example 7: Disaster recovery snapshots
let dr_disk = qcow2_create("/var/lib/vms/disaster-recovery.qcow2", 500);

qcow2_snapshot_create("/var/lib/vms/disaster-recovery.qcow2", "rto-1h");      // Recovery Time Objective
qcow2_snapshot_create("/var/lib/vms/disaster-recovery.qcow2", "rto-4h");
qcow2_snapshot_create("/var/lib/vms/disaster-recovery.qcow2", "rto-24h");
qcow2_snapshot_create("/var/lib/vms/disaster-recovery.qcow2", "rpo-15min");   // Recovery Point Objective
qcow2_snapshot_create("/var/lib/vms/disaster-recovery.qcow2", "rpo-1h");
qcow2_snapshot_create("/var/lib/vms/disaster-recovery.qcow2", "rpo-daily");

// Example 8: Multi-tier environment snapshots
let multi_tier = qcow2_create("/var/lib/vms/multi-tier.qcow2", 100);

let tiers = ["dev", "staging", "production"];
for tier in tiers {
    qcow2_snapshot_create("/var/lib/vms/multi-tier.qcow2", tier + "-base");
    qcow2_snapshot_create("/var/lib/vms/multi-tier.qcow2", tier + "-current");
    qcow2_snapshot_create("/var/lib/vms/multi-tier.qcow2", tier + "-backup");
}

// Example 9: Feature branch snapshots
let feature_disk = qcow2_create("/var/lib/vms/features.qcow2", 100);

let features = ["auth-system", "api-v2", "caching-layer", "logging"];
for feature in features {
    qcow2_snapshot_create("/var/lib/vms/features.qcow2", "feature-" + feature + "-start");
    qcow2_snapshot_create("/var/lib/vms/features.qcow2", "feature-" + feature + "-tested");
    qcow2_snapshot_create("/var/lib/vms/features.qcow2", "feature-" + feature + "-merged");
}

// Example 10: Snapshot listing and analysis
let disk_path = "/var/lib/vms/analysis.qcow2";
qcow2_create(disk_path, 50);

let snapshots = qcow2_snapshot_list(disk_path);

let snapshot_count = snapshots.len();
for snap in snapshots {
    let name = snap.name;
}

// Example 11: Disk info tracking
let tracked_disk = "/var/lib/vms/tracked.qcow2";
qcow2_create(tracked_disk, 100);

let initial_info = qcow2_info(tracked_disk);
let initial_size = initial_info.actual_size;

// Create snapshots and track growth
for i in range(0, 5) {
    qcow2_snapshot_create(tracked_disk, "checkpoint-" + i);
    let current_info = qcow2_info(tracked_disk);
    let current_size = current_info.actual_size;
}

// Example 12: Virtual machine template snapshots
let template_disk = qcow2_create("/var/lib/vms/templates.qcow2", 200);

let templates = [
    #{ name: "web-server", snaps: ["base", "nginx-installed", "config-applied"] },
    #{ name: "app-server", snaps: ["base", "runtime-installed", "libs-added"] },
    #{ name: "db-server", snaps: ["base", "postgres-installed", "schema-loaded"] }
];

for template in templates {
    for snap_name in template.snaps {
        qcow2_snapshot_create(template_disk, template.name + "-" + snap_name);
    }
}

// Example 13: Cleanup old snapshots
let cleanup_disk = "/var/lib/vms/cleanup.qcow2";
qcow2_create(cleanup_disk, 50);

// Create many snapshots
for i in range(0, 20) {
    qcow2_snapshot_create(cleanup_disk, "snapshot-" + i);
}

// List and delete old ones
let all_snaps = qcow2_snapshot_list(cleanup_disk);

// Keep only recent 5
let keep_count = 5;
let delete_count = 0;
for i in range(keep_count, all_snaps.len()) {
    let snap_to_delete = all_snaps[i];
    qcow2_snapshot_delete(cleanup_disk, snap_to_delete.name);
    delete_count = delete_count + 1;
}

// Example 14: Disk family hierarchy
let family_disk = qcow2_create("/var/lib/vms/family.qcow2", 100);

// Parent level
qcow2_snapshot_create(family_disk, "parent-initial");

// First generation
qcow2_snapshot_create(family_disk, "gen1-start");
qcow2_snapshot_create(family_disk, "gen1-stable");

// Second generation (based on gen1)
qcow2_snapshot_create(family_disk, "gen2-start");
qcow2_snapshot_create(family_disk, "gen2-stable");

// Third generation
qcow2_snapshot_create(family_disk, "gen3-start");
qcow2_snapshot_create(family_disk, "gen3-stable");
