#!/bin/bash
set -e

# 📦 Install required tools
apk add --no-cache git bash curl yq jq

echo "🔍 Scanning for apps with cname.yaml..."

mkdir -p generated-values
rm -rf .tmp-repos
mkdir -p .tmp-repos

# === REPO CONFIG ===
SANDBOX_REPO_URL="https://git.dvirlabs.com/dvirlabs/sandbox.git"
INFRA_REPO_URL="https://${GIT_TOKEN}@git.dvirlabs.com/dvirlabs/infra.git"
SANDBOX_CLONE=".tmp-repos/sandbox"
INFRA_CLONE=".tmp-repos/infra"
GENERATED_FILE="generated-values/cloudflared-values.yaml"
ORIGINAL_FILE="$INFRA_CLONE/manifests/cloudflared/values.yaml"
MERGED_FILE="$INFRA_CLONE/manifests/cloudflared/values.yaml"

# === STEP 1: Clone Repos ===
echo "📦 Cloning sandbox..."
git clone --depth=1 "$SANDBOX_REPO_URL" "$SANDBOX_CLONE"

echo "📦 Cloning infra..."
git clone --depth=1 "$INFRA_REPO_URL" "$INFRA_CLONE"

# === STEP 2: Generate new ingress entries ===
echo "⚙️  Generating sandbox ingress list..."
cat <<EOF > "$GENERATED_FILE"
ingress: []
EOF

find "$SANDBOX_CLONE/manifests" -name cname.yaml | while read -r cname_file; do
  app_name=$(basename "$(dirname "$cname_file")")
  enabled=$(yq '.enabled' "$cname_file")

  if [[ "$enabled" == "true" ]]; then
    hostname=$(yq '.hostname' "$cname_file")
    port=$(yq '.port // 80' "$cname_file")  # default to 80 if not set
    service="http://${app_name}.sandbox.svc.cluster.local:$port"

    echo "✅ Found $hostname → $service"

    # Append to ingress list
    yq eval ".ingress += [{\"hostname\": \"$hostname\", \"service\": \"$service\"}]" -i "$GENERATED_FILE"
  fi
done

echo "📄 Generated Ingress:"
cat "$GENERATED_FILE"

# === STEP 3: Merge ingress only ===
echo "🔁 Merging ingress into: $ORIGINAL_FILE"

TEMP_FILE=$(mktemp)
yq eval '.cloudflare.ingress' "$ORIGINAL_FILE" > "$TEMP_FILE"

yq eval '.ingress' "$GENERATED_FILE" | yq eval -o=json '.' - | jq -c '.[]' | while read -r new_entry; do
  hostname=$(echo "$new_entry" | jq -r '.hostname')
  service=$(echo "$new_entry" | jq -r '.service')

  exists=$(yq e ".cloudflare.ingress[] | select(.hostname == \"$hostname\")" "$ORIGINAL_FILE")

  if [ -z "$exists" ]; then
    echo "➕ Adding $hostname → $service"
    yq eval ". += [{\"hostname\": \"$hostname\", \"service\": \"$service\"}]" -i "$TEMP_FILE"
  else
    echo "⚠️  $hostname already exists, skipping"
  fi
done

echo "📝 Writing merged file to $MERGED_FILE"

# Merge ingress back into full file, preserving all existing fields
yq eval-all '
  select(fileIndex == 0) as $orig |
  select(fileIndex == 1) as $newIngress |
  $orig * {
    cloudflare: $orig.cloudflare * {
      ingress: $newIngress
    }
  }
' "$ORIGINAL_FILE" "$TEMP_FILE" > "$MERGED_FILE"

echo "✅ Final merged values.yaml:"
cat "$MERGED_FILE"

# === STEP 4: Git Push ===
echo "📤 Pushing updated values.yaml to infra repo..."

cd "$INFRA_CLONE"
git config user.name "woodpecker-bot"
git config user.email "ci@dvirlabs.com"
git remote set-url origin "https://${GIT_TOKEN}@git.dvirlabs.com/dvirlabs/infra.git"

if ! git diff --quiet manifests/cloudflared/values.yaml; then
  git add manifests/cloudflared/values.yaml
  git commit -m "chore(cloudflared): auto-merge CNAME entries from sandbox"
  git push origin HEAD
  echo "✅ Changes pushed successfully."
else
  echo "ℹ️  No changes to commit."
fi