#!/usr/bin/env bash
set -euo pipefail
# Azure Blob Storage backup upload
# Uses: az cli
# Env: AZURE_STORAGE_ACCOUNT, AZURE_STORAGE_KEY, AZURE_CONTAINER

BACKUP_FILE="${1:?Usage: $0 <backup-file>}"
TIMESTAMP=$(date +%Y%m%d-%H%M%S)
KEY="gitea-dump-${TIMESTAMP}.zip"

echo "Uploading ${KEY}..."
az storage blob upload \
  --account-name "${AZURE_STORAGE_ACCOUNT}" \
  --account-key "${AZURE_STORAGE_KEY}" \
  --container-name "${AZURE_CONTAINER}" \
  --name "${KEY}" \
  --file "$BACKUP_FILE" \
  --overwrite
echo "Upload complete."

# Prune backups older than 7 days
echo "Pruning backups older than 7 days..."
CUTOFF=$(date -d '7 days ago' +%Y-%m-%dT%H:%M:%SZ 2>/dev/null || date -v-7d +%Y-%m-%dT%H:%M:%SZ)
az storage blob list \
  --account-name "${AZURE_STORAGE_ACCOUNT}" \
  --account-key "${AZURE_STORAGE_KEY}" \
  --container-name "${AZURE_CONTAINER}" \
  --query "[?properties.lastModified<'${CUTOFF}'].name" -o tsv \
  | while read -r name; do
      [ -n "$name" ] && az storage blob delete \
        --account-name "${AZURE_STORAGE_ACCOUNT}" \
        --account-key "${AZURE_STORAGE_KEY}" \
        --container-name "${AZURE_CONTAINER}" \
        --name "$name" && echo "Deleted: ${name}"
    done
echo "Pruning complete."