#!/bin/bash

#
# FTPS Deployment Script for markusgraf.ch
#
# This script deploys the Hugo-built static site to the production server
# via FTPS (FTP over SSL/TLS).
#
# Prerequisites:
#   - Hugo site must be built (public/ directory exists)
#   - lftp must be installed
#   - FTPS_PASSWORD environment variable must be set
#
# Usage:
#   export FTPS_PASSWORD='your-password'
#   ./scripts/deploy.sh
#
# Server Details:
#   - Server: www.markusgraf.ch
#   - Username: gurix
#   - Target Directory: httpsdocs/
#   - Source Directory: public/
#

set -e  # Exit on error
set -u  # Exit on undefined variable

# Colors for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m' # No Color

# Configuration
FTPS_SERVER="www.markusgraf.ch"
TARGET_DIR="httpsdocs"
SOURCE_DIR="public"

#
# Print error message in red and exit
#
error() {
    echo -e "${RED}ERROR: $1${NC}" >&2
    exit 1
}

#
# Print warning message in yellow
#
warn() {
    echo -e "${YELLOW}WARNING: $1${NC}" >&2
}

#
# Print success message in green
#
success() {
    echo -e "${GREEN}$1${NC}"
}

#
# Print info message
#
info() {
    echo "$1"
}

#
# Check all prerequisites before deployment
#
check_prerequisites() {
    info "Checking prerequisites..."

    # Check if public/ directory exists and is not empty
    if [ ! -d "$SOURCE_DIR" ]; then
        error "Directory '$SOURCE_DIR' does not exist. Please run 'hugo build' first."
    fi

    if [ ! "$(ls -A $SOURCE_DIR)" ]; then
        error "Directory '$SOURCE_DIR' is empty. Please run 'hugo build' first."
    fi

    # Check if lftp is installed
    if ! command -v lftp &> /dev/null; then
        error "lftp is not installed. Please install it first:
    Ubuntu/Debian: sudo apt-get install lftp
    macOS: brew install lftp
    Fedora: sudo dnf install lftp"
    fi

    # Check if FTPS_PASSWORD is set
    if [ -z "${FTPS_PASSWORD:-}" ]; then
        error "FTPS_PASSWORD environment variable is not set.
    Please set it before running this script:
    export FTPS_PASSWORD='your-password'"
    fi

    # Check if FTPS_USER is set
    if [ -z "${FTPS_USER:-}" ]; then
        error "FTPS_USER environment variable is not set.
    Please set it before running this script:
    export FTPS_USER='user'"
    fi

    success "All prerequisites met."
}

#
# Deploy site to server via FTPS
#
deploy() {
    info "Starting deployment to $FTPS_SERVER..."
    info "Connecting as user: $FTPS_USER"
    info "Uploading from: $SOURCE_DIR/"
    info "Target directory: $TARGET_DIR/"

    # Use lftp to upload files via FTPS
    # Note: Password is passed via environment variable to avoid exposure in process list
    lftp -e "
        set ftps:initial-prot '';
        set ftp:ssl-force true;
        set ftp:ssl-protect-data true;
        set ssl:verify-certificate no;
        set net:timeout 30;
        set net:max-retries 3;
        set net:reconnect-interval-base 5;
        open ftps://$FTPS_USER:$FTPS_PASSWORD@$FTPS_SERVER;
        cd $TARGET_DIR || mkdir -p $TARGET_DIR;
        lcd $SOURCE_DIR;
        mirror --reverse --delete --verbose --parallel=3;
        bye
    "

    local exit_code=$?

    if [ $exit_code -eq 0 ]; then
        success "Deployment completed successfully!"
        info "Your site is now live at https://markusgraf.ch"
        return 0
    else
        error "Deployment failed with exit code $exit_code.

Troubleshooting:
  - Verify your password is correct
  - Check network connectivity to $FTPS_SERVER
  - Ensure the target directory '$TARGET_DIR' exists on the server
  - Check server logs for additional details"
    fi
}

#
# Main execution
#
main() {
    info "=== FTPS Deployment Script ==="
    info ""

    check_prerequisites
    info ""

    deploy
}

# Run main function
main