#!/bin/bash
set -e

# 📦 Ensure apk installs: yq, jq, git, bash, curl
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 ===
REPOS=(
  "sandbox|https://git.dvirlabs.com/dvirlabs/sandbox.git"
  "dev-tools|https://git.dvirlabs.com/dvirlabs/dev-tools.git"
  "my-apps|https://git.dvirlabs.com/dvirlabs/my-apps.git"
  "observability-stack|https://git.dvirlabs.com/dvirlabs/observability-stack.git"
)

INFRA_REPO_URL="https://${GIT_TOKEN}@git.dvirlabs.com/dvirlabs/infra.git"
INFRA_CLONE=".tmp-repos/infra"
GENERATED_FILE="$(pwd)/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 target app repos..."
for entry in "${REPOS[@]}"; do
  SECTION_NAME="${entry%%|*}"
  REPO_URL="${entry##*|}"
  REPO_DIR=".tmp-repos/$SECTION_NAME"
  git clone --depth=1 "$REPO_URL" "$REPO_DIR"
done

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

ls -l .tmp-repos/

# === STEP 2: Extract CNAMEs from all repos ===
echo "⚙️  Generating merged ingress list..."
echo "ingress: []" > "$GENERATED_FILE"

for entry in "${REPOS[@]}"; do
  SECTION_NAME="${entry%%|*}"
  REPO_DIR=".tmp-repos/$SECTION_NAME"

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

    if [[ "$enabled" == "true" ]]; then
      hostname=$(yq '.hostname' "$cname_file")
      service="http://${app_name}.${SECTION_NAME}.svc.cluster.local:80"

      echo "✅ Found $hostname → $service in $SECTION_NAME"

      yq eval ".ingress += [{\"hostname\": \"$hostname\", \"service\": \"$service\", \"_section\": \"$SECTION_NAME\"}]" -i "$GENERATED_FILE"
    fi
  done
done

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

# === STEP 3: Merge with existing cloudflared values ===
echo "🔁 Merging new entries into: $ORIGINAL_FILE"

TEMP_FILE=$(mktemp)
cp "$ORIGINAL_FILE" "$TEMP_FILE"

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

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

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

# === STEP 4: Overwrite only ingress list and preserve all other fields ===
echo "📝 Writing final merged values.yaml"
cp "$TEMP_FILE" "$MERGED_FILE"

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

# === STEP 5: Optional push to Git ===
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 all repos"
  git push origin HEAD
  echo "✅ Changes pushed successfully."
else
  echo "ℹ️  No changes to commit."
fi

# === STEP 6: Create CNAME records in Cloudflare ===
ls -l
pwd
ls -l "$GENERATED_FILE"
echo "🌐 Creating CNAME records in Cloudflare..."
CLOUDFLARE_API="https://api.cloudflare.com/client/v4"
TARGET="b50bbf48-0a2f-47ce-b73e-336b6718318b.cfargotunnel.com"

: "${CLOUDFLARE_API_TOKEN:?CLOUDFLARE_API_TOKEN not set}"
: "${CLOUDFLARE_ZONE_ID:?CLOUDFLARE_ZONE_ID not set}"

yq eval '.ingress' "$GENERATED_FILE" | yq -o=json | jq -c '.[]' | while read -r record; do
  name=$(echo "$record" | jq -r '.hostname' | sed 's/\.dvirlabs\.com//')

  exists=$(curl -s -X GET "$CLOUDFLARE_API/zones/$CLOUDFLARE_ZONE_ID/dns_records?type=CNAME&name=$name.dvirlabs.com" \
    -H "Authorization: Bearer $CLOUDFLARE_API_TOKEN" -H "Content-Type: application/json" | jq '.result | length')

  if [ "$exists" -eq 0 ]; then
    echo "➕ Creating CNAME: $name.dvirlabs.com → $TARGET"
    curl -s -X POST "$CLOUDFLARE_API/zones/$CLOUDFLARE_ZONE_ID/dns_records" \
      -H "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \
      -H "Content-Type: application/json" \
      --data "{
        \"type\": \"CNAME\",
        \"name\": \"$name\",
        \"content\": \"$TARGET\",
        \"ttl\": 1,
        \"proxied\": true
      }" > /dev/null
  else
    echo "⚠️  CNAME for $name.dvirlabs.com already exists, skipping"
  fi
done