#!/bin/bash
#
# Portainer Stack Exporter
# Connects to a Portainer instance via API and downloads all Stack compose files.
#

set -euo pipefail

# Portainer configuration (Legacy Cluster)
PORTAINER_URL="https://shipyard.snarfnet.net:9443"
USERNAME="admin"
PASSWORD="Cfxg0GqDfocWcteE"
EXPORT_DIR="./portainer_stacks_export"

if ! command -v jq &> /dev/null; then
    echo "ERROR: 'jq' is required to parse the JSON responses. Please install it."
    exit 1
fi

mkdir -p "$EXPORT_DIR"

echo "=== Portainer Stack Exporter ==="
echo "Authenticating with Portainer at $PORTAINER_URL..."

# 1. Authenticate and get JWT Token
JWT=$(curl -s -k -X POST "${PORTAINER_URL}/api/auth" \
    -H "Content-Type: application/json" \
    -d "{\"Username\":\"${USERNAME}\",\"Password\":\"${PASSWORD}\"}" | jq -r '.jwt')

if [ "$JWT" = "null" ] || [ -z "$JWT" ]; then
    echo "Authentication failed! Check your credentials or URL."
    exit 1
fi
echo "Authentication successful."

# 2. Fetch Stacks list
echo "Fetching stacks..."
STACKS_JSON=$(curl -s -k -H "Authorization: Bearer $JWT" "${PORTAINER_URL}/api/stacks")

# 3. Iterate through stacks, grab the file, and save it
echo "$STACKS_JSON" | jq -c '.[]' | while read -r stack; do
    STACK_ID=$(echo "$stack" | jq -r '.Id')
    STACK_NAME=$(echo "$stack" | jq -r '.Name')
    
    echo " -> Exporting stack: $STACK_NAME (ID: $STACK_ID)"
    FILE_CONTENT=$(curl -s -k -H "Authorization: Bearer $JWT" "${PORTAINER_URL}/api/stacks/${STACK_ID}/file" | jq -r '.StackFileContent')
    
    echo "$FILE_CONTENT" > "${EXPORT_DIR}/${STACK_NAME}.yml"
done

echo "=== Export Complete ==="
echo "Your stack files have been saved to: ${EXPORT_DIR}/"