#!/bin/bash
# Demo 2: Kubernetes Taskserv Deployment
# Time: ~1 minute
# Shows: KCL schema validation, dependency resolution, parallel execution

set -e

echo "╔════════════════════════════════════════════════════════╗"
echo "║  Demo 2: Kubernetes Taskserv Deployment               ║"
echo "║  Time: ~1 minute                                       ║"
echo "╚════════════════════════════════════════════════════════╝"
echo ""

# Step 1: Show command
echo "Step 1️⃣  Deploy Kubernetes taskserv"
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
echo ""
echo "$ provisioning taskserv create kubernetes \\"
echo "    --infra demo \\"
echo "    --check"
echo ""
sleep 2

# Step 2: KCL Schema Validation
echo "Step 2️⃣  KCL Schema Validation (Type-Safe!)"
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
echo ""
echo "Validating KCL configuration..."
echo ""
echo "✓ Taskserv type: 'kubernetes' (valid)"
echo "✓ Version: '1.28.0' (compatible)"
echo "✓ Requirements: [cilium, containerd] (valid)"
echo "✓ Infrastructure 'demo': exists and accessible"
echo "✓ Compute capacity: sufficient"
echo "✓ KCL schema validation: PASSED"
echo ""
sleep 2

# Step 3: Dependency Resolution
echo "Step 3️⃣  Dependency Resolution (Automatic)"
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
echo ""
echo "Resolving taskserv dependencies..."
echo ""
echo "kubernetes (1.28.0)"
echo "  ├─ containerd (1.7.0)     ← required"
echo "  ├─ cilium (1.14.0)        ← required (CNI)"
echo "  ├─ etcd (3.5.0)           ← internal (auto)"
echo "  └─ core-utils             ← base deps"
echo ""
echo "Execution Plan:"
echo "  1. containerd (in parallel)"
echo "  2. cilium    (in parallel)"
echo "  3. etcd      (sequential)"
echo "  4. kubernetes (after etcd)"
echo ""
echo "Parallel efficiency: 75% (4 tasks, 3 in parallel)"
echo ""
sleep 2

# Step 4: Pre-flight checks
echo "Step 4️⃣  Pre-flight Checks"
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
echo ""
echo "Checking deployment readiness..."
echo ""
echo "✓ Target server exists (web-01)"
echo "✓ Server reachable (SSH OK)"
echo "✓ Disk space: 48GB available (needs 12GB)"
echo "✓ Memory available: 3.2GB (needs 2GB)"
echo "✓ Network connectivity: OK"
echo "✓ Port availability: 6443 (K8s API), 10250 (kubelet) free"
echo "✓ Required binaries available"
echo ""
echo "All pre-flight checks: PASSED ✓"
echo ""
sleep 2

# Step 5: Dry-run output
echo "Step 5️⃣  Deployment Plan (Dry-Run Preview)"
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
echo ""
echo "┌─────────────────────────────────────────────────────┐"
echo "│ Kubernetes Deployment Plan (Dry-Run)                │"
echo "├─────────────────────────────────────────────────────┤"
echo "│                                                     │"
echo "│ Phase 1: Dependency Installation (2 min)            │"
echo "│   • containerd + cilium (parallel)     ~90 sec      │"
echo "│   • etcd initialization                 ~30 sec      │"
echo "│                                                     │"
echo "│ Phase 2: Kubernetes Setup (3 min)                   │"
echo "│   • Control plane initialization       ~100 sec      │"
echo "│   • API server startup                  ~30 sec      │"
echo "│   • Core add-ons deployment             ~20 sec      │"
echo "│                                                     │"
echo "│ Phase 3: Verification (30 sec)                      │"
echo "│   • Cluster health check                ~15 sec      │"
echo "│   • Pod readiness verification          ~15 sec      │"
echo "│                                                     │"
echo "│ ESTIMATED TOTAL TIME: ~5 minutes                    │"
echo "│                                                     │"
echo "│ Status: ✓ Ready to deploy                           │"
echo "│ (No changes made - dry-run mode)                    │"
echo "│                                                     │"
echo "└─────────────────────────────────────────────────────┘"
echo ""
sleep 2

# Step 6: Configuration details
echo "Step 6️⃣  Kubernetes Configuration Details"
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
echo ""
echo "API Server:"
echo "  • Address: 0.0.0.0:6443"
echo "  • TLS: enabled (auto-generated certs)"
echo "  • RBAC: enabled"
echo "  • Audit logging: enabled"
echo ""
echo "Network:"
echo "  • Pod CIDR: 10.244.0.0/16"
echo "  • Service CIDR: 10.96.0.0/12"
echo "  • DNS: CoreDNS"
echo ""
echo "Storage:"
echo "  • Default StorageClass: provisioned"
echo "  • Monitoring: prometheus enabled"
echo ""
sleep 2

# Step 7: Summary
echo "Step 7️⃣  Summary"
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
echo ""
echo "✓ KCL schema validated (type-safe)"
echo "✓ Dependencies resolved automatically"
echo "✓ Pre-flight checks passed"
echo "✓ Deployment plan verified"
echo "✓ Dry-run successful"
echo ""
echo "To actually deploy Kubernetes, run:"
echo "  $ provisioning taskserv create kubernetes --infra demo"
echo ""
echo "Then access with:"
echo "  $ kubectl --kubeconfig ~/.provisioning/kubeconfig get nodes"
echo ""
echo "╔════════════════════════════════════════════════════════╗"
echo "║  Key Insight: Parallel execution = 75% faster          ║"
echo "║  vs sequential (Ansible, Terraform)                    ║"
echo "╚════════════════════════════════════════════════════════╝"