#!/bin/bash
# Migration script from Cozystack ConfigMaps to Package-based configuration
# This script converts cozystack, cozystack-branding, and cozystack-scheduling
# ConfigMaps into a Package resource with the new values structure.

set -e

NAMESPACE="cozy-system"

echo "============================="
echo " Cozystack Migration to v1.0 "
echo "============================="
echo ""
echo "This script will convert existing ConfigMaps to a Package resource."
echo ""

# Check if kubectl is available
if ! command -v kubectl &> /dev/null; then
    echo "Error: kubectl is not installed or not in PATH"
    exit 1
fi

# Check if jq is available
if ! command -v jq &> /dev/null; then
    echo "Error: jq is not installed or not in PATH"
    exit 1
fi

# Check if we can access the cluster
if ! kubectl get namespace "$NAMESPACE" &> /dev/null; then
    echo "Error: Cannot access namespace $NAMESPACE"
    exit 1
fi

# Read ConfigMap cozystack
echo "Reading ConfigMap cozystack..."
COZYSTACK_CM=$(kubectl get configmap -n "$NAMESPACE" cozystack -o json 2>/dev/null || echo "{}")

# Read ConfigMap cozystack-branding
echo "Reading ConfigMap cozystack-branding..."
BRANDING_CM=$(kubectl get configmap -n "$NAMESPACE" cozystack-branding -o json 2>/dev/null || echo "{}")

# Read ConfigMap cozystack-scheduling
echo "Reading ConfigMap cozystack-scheduling..."
SCHEDULING_CM=$(kubectl get configmap -n "$NAMESPACE" cozystack-scheduling -o json 2>/dev/null || echo "{}")

# Extract values from cozystack ConfigMap
CLUSTER_DOMAIN=$(echo "$COZYSTACK_CM" | jq -r '.data["cluster-domain"] // "cozy.local"')
ROOT_HOST=$(echo "$COZYSTACK_CM" | jq -r '.data["root-host"] // "example.org"')
API_SERVER_ENDPOINT=$(echo "$COZYSTACK_CM" | jq -r '.data["api-server-endpoint"] // ""')
OIDC_ENABLED=$(echo "$COZYSTACK_CM" | jq -r '.data["oidc-enabled"] // "false"')
KEYCLOAK_REDIRECTS=$(echo "$COZYSTACK_CM" | jq -r '.data["extra-keycloak-redirect-uri-for-dashboard"] // ""' )
TELEMETRY_ENABLED=$(echo "$COZYSTACK_CM" | jq -r '.data["telemetry-enabled"] // "true"')
BUNDLE_NAME=$(echo "$COZYSTACK_CM" | jq -r '.data["bundle-name"] // "paas-full"')

# Network configuration
POD_CIDR=$(echo "$COZYSTACK_CM" | jq -r '.data["ipv4-pod-cidr"] // "10.244.0.0/16"')
POD_GATEWAY=$(echo "$COZYSTACK_CM" | jq -r '.data["ipv4-pod-gateway"] // "10.244.0.1"')
SVC_CIDR=$(echo "$COZYSTACK_CM" | jq -r '.data["ipv4-svc-cidr"] // "10.96.0.0/16"')
JOIN_CIDR=$(echo "$COZYSTACK_CM" | jq -r '.data["ipv4-join-cidr"] // "100.64.0.0/16"')

EXTERNAL_IPS=$(echo "$COZYSTACK_CM" | jq -r '.data["expose-external-ips"] // ""')
if [ -z "$EXTERNAL_IPS" ]; then
    EXTERNAL_IPS="[]"
else
    EXTERNAL_IPS=$(echo "$EXTERNAL_IPS" | sed 's/,/\n/g' | awk 'BEGIN{print}{print "          - "$0}')
fi

# Determine bundle type
case "$BUNDLE_NAME" in
    paas-full|distro-full)
        SYSTEM_ENABLED="true"
        SYSTEM_TYPE="full"
        ;;
    paas-hosted|distro-hosted)
        SYSTEM_ENABLED="false"
        SYSTEM_TYPE="hosted"
        ;;
    *)
        SYSTEM_ENABLED="false"
        SYSTEM_TYPE="hosted"
        ;;
esac

# Update bundle naming
BUNDLE_NAME=$(echo "$BUNDLE_NAME" | sed 's/paas/isp/')

# Extract branding if available
BRANDING=$(echo "$BRANDING_CM" | jq -r '.data // {} | to_entries[] | "\(.key): \"\(.value)\""')
if [ -z "$BRANDING" ]; then 
    BRANDING="{}"
else
    BRANDING=$(echo "$BRANDING" | awk 'BEGIN{print}{print "          " $0}')
fi

# Extract scheduling if available
SCHEDULING_CONSTRAINTS=$(echo "$SCHEDULING_CM" | jq -r '.data["globalAppTopologySpreadConstraints"] // ""')
if [ -z "$SCHEDULING_CONSTRAINTS" ]; then
    SCHEDULING_CONSTRAINTS='""'
else
    SCHEDULING_CONSTRAINTS=$(echo "$SCHEDULING_CONSTRAINTS" | awk 'BEGIN{print}{print "            " $0}')
fi

echo ""
echo "Extracted configuration:"
echo "  Cluster Domain: $CLUSTER_DOMAIN"
echo "  Root Host: $ROOT_HOST"
echo "  API Server Endpoint: $API_SERVER_ENDPOINT"
echo "  OIDC Enabled: $OIDC_ENABLED"
echo "  Bundle Name: $BUNDLE_NAME"
echo "  System Enabled: $SYSTEM_ENABLED"
echo "  System Type: $SYSTEM_TYPE"
echo ""

# Generate Package YAML
PACKAGE_YAML=$(cat <<EOF
apiVersion: cozystack.io/v1alpha1
kind: Package
metadata:
  name: cozystack.cozystack-platform
  namespace: $NAMESPACE
spec:
  variant: $BUNDLE_NAME
  components:
    platform:
      values:
        bundles:
          system:
            enabled: $SYSTEM_ENABLED
            type: "$SYSTEM_TYPE"
          iaas:
            enabled: true
          paas:
            enabled: true
          naas:
            enabled: true
        networking:
          clusterDomain: "$CLUSTER_DOMAIN"
          podCIDR: "$POD_CIDR"
          podGateway: "$POD_GATEWAY"
          serviceCIDR: "$SVC_CIDR"
          joinCIDR: "$JOIN_CIDR"
        publishing:
          host: "$ROOT_HOST"
          apiServerEndpoint: "$API_SERVER_ENDPOINT"
          externalIPs: $EXTERNAL_IPS
        authentication:
          oidc:
            enabled: $OIDC_ENABLED
            keycloakExtraRedirectUri: "$KEYCLOAK_REDIRECTS"
        scheduling:
          globalAppTopologySpreadConstraints: $SCHEDULING_CONSTRAINTS
        branding: $BRANDING
EOF
)

echo "Generated Package resource:"
echo "---"
echo "$PACKAGE_YAML"
echo "..."
echo ""

read -p "Do you want to apply this Package? (y/N) " -n 1 -r
echo ""

if [[ $REPLY =~ ^[Yy]$ ]]; then
    echo "Applying Package..."
    echo "$PACKAGE_YAML" | kubectl apply -f -
    echo ""
    echo "Package applied successfully!"
    echo ""
    echo "You can now safely delete the old ConfigMaps after verifying the migration:"
    echo "  kubectl delete configmap -n $NAMESPACE cozystack cozystack-branding cozystack-scheduling"
else
    echo "Package not applied. You can save the output above and apply it manually."
fi

echo ""
echo "All done!"