#!/usr/bin/env bash
set -Eeuo pipefail

# =====================================================
# BotKonzept Setup Script
# =====================================================
# This script sets up the complete BotKonzept platform
# including database, n8n workflows, and website

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

# Color codes
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m' # No Color

# Configuration
SUPABASE_HOST="${SUPABASE_HOST:-192.168.45.3}"
SUPABASE_PORT="${SUPABASE_PORT:-5432}"
SUPABASE_DB="${SUPABASE_DB:-customer}"
SUPABASE_USER="${SUPABASE_USER:-customer}"
SUPABASE_PASSWORD="${SUPABASE_PASSWORD:-}"

N8N_HOST="${N8N_HOST:-n8n.userman.de}"
WEBSITE_DIR="${WEBSITE_DIR:-/var/www/botkonzept}"

print_header() {
    echo -e "${BLUE}========================================${NC}"
    echo -e "${BLUE}$1${NC}"
    echo -e "${BLUE}========================================${NC}"
    echo ""
}

print_success() {
    echo -e "${GREEN}✓${NC} $1"
}

print_error() {
    echo -e "${RED}✗${NC} $1"
}

print_info() {
    echo -e "${BLUE}ℹ${NC} $1"
}

print_warning() {
    echo -e "${YELLOW}⚠${NC} $1"
}

# Check prerequisites
check_prerequisites() {
    print_header "Checking Prerequisites"
    
    local missing=0
    
    # Check psql
    if command -v psql >/dev/null 2>&1; then
        print_success "PostgreSQL client installed"
    else
        print_error "PostgreSQL client not found"
        missing=1
    fi
    
    # Check curl
    if command -v curl >/dev/null 2>&1; then
        print_success "curl installed"
    else
        print_error "curl not found"
        missing=1
    fi
    
    # Check jq
    if command -v jq >/dev/null 2>&1; then
        print_success "jq installed"
    else
        print_warning "jq not found (optional, but recommended)"
    fi
    
    if [[ $missing -eq 1 ]]; then
        print_error "Missing required dependencies. Please install them first."
        exit 1
    fi
    
    echo ""
}

# Setup database
setup_database() {
    print_header "Setting up Database"
    
    if [[ -z "$SUPABASE_PASSWORD" ]]; then
        print_error "SUPABASE_PASSWORD not set"
        echo "Please set the password:"
        echo "  export SUPABASE_PASSWORD='your-password'"
        exit 1
    fi
    
    print_info "Connecting to PostgreSQL at ${SUPABASE_HOST}:${SUPABASE_PORT}"
    
    # Test connection
    if PGPASSWORD="$SUPABASE_PASSWORD" psql -h "$SUPABASE_HOST" -p "$SUPABASE_PORT" -U "$SUPABASE_USER" -d "$SUPABASE_DB" -c "SELECT 1" >/dev/null 2>&1; then
        print_success "Database connection successful"
    else
        print_error "Cannot connect to database"
        exit 1
    fi
    
    # Create schema
    print_info "Creating BotKonzept schema..."
    if PGPASSWORD="$SUPABASE_PASSWORD" psql -h "$SUPABASE_HOST" -p "$SUPABASE_PORT" -U "$SUPABASE_USER" -d "$SUPABASE_DB" -f "${SCRIPT_DIR}/sql/botkonzept_schema.sql" >/dev/null 2>&1; then
        print_success "Schema created successfully"
    else
        print_error "Failed to create schema"
        exit 1
    fi
    
    # Verify tables
    print_info "Verifying tables..."
    local tables=$(PGPASSWORD="$SUPABASE_PASSWORD" psql -h "$SUPABASE_HOST" -p "$SUPABASE_PORT" -U "$SUPABASE_USER" -d "$SUPABASE_DB" -tAc "SELECT COUNT(*) FROM information_schema.tables WHERE table_schema='public' AND table_name IN ('customers', 'instances', 'subscriptions', 'payments', 'emails_sent')")
    
    if [[ "$tables" -eq 5 ]]; then
        print_success "All tables created successfully"
    else
        print_warning "Expected 5 tables, found $tables"
    fi
    
    echo ""
}

# Setup n8n workflows
setup_n8n_workflows() {
    print_header "Setting up n8n Workflows"
    
    print_info "n8n workflows need to be imported manually:"
    echo ""
    echo "1. Open n8n: https://${N8N_HOST}"
    echo "2. Go to Workflows → Import from File"
    echo "3. Import these files:"
    echo "   - ${SCRIPT_DIR}/BotKonzept-Customer-Registration-Workflow.json"
    echo "   - ${SCRIPT_DIR}/BotKonzept-Trial-Management-Workflow.json"
    echo ""
    echo "4. Configure credentials:"
    echo "   - SSH (PVE20): Private key for Proxmox"
    echo "   - PostgreSQL (Supabase): Host=${SUPABASE_HOST}, DB=${SUPABASE_DB}"
    echo "   - SMTP (Postfix/SES): Your email server"
    echo ""
    
    read -p "Press Enter when workflows are imported and configured..."
    
    print_success "n8n workflows configured"
    echo ""
}

# Setup website
setup_website() {
    print_header "Setting up Website"
    
    if [[ ! -d "${SCRIPT_DIR}/botkonzept-website" ]]; then
        print_error "Website directory not found: ${SCRIPT_DIR}/botkonzept-website"
        exit 1
    fi
    
    print_info "Website files location: ${SCRIPT_DIR}/botkonzept-website"
    print_info "Target directory: ${WEBSITE_DIR}"
    echo ""
    
    # Update webhook URL in JavaScript
    print_info "Updating webhook URL in JavaScript..."
    local webhook_url="https://${N8N_HOST}/webhook/botkonzept-registration"
    
    if [[ -f "${SCRIPT_DIR}/botkonzept-website/js/main.js" ]]; then
        sed -i.bak "s|WEBHOOK_URL:.*|WEBHOOK_URL: '${webhook_url}',|" "${SCRIPT_DIR}/botkonzept-website/js/main.js"
        print_success "Webhook URL updated to: ${webhook_url}"
    fi
    
    echo ""
    print_info "To deploy the website, run:"
    echo "  sudo mkdir -p ${WEBSITE_DIR}"
    echo "  sudo cp -r ${SCRIPT_DIR}/botkonzept-website/* ${WEBSITE_DIR}/"
    echo "  sudo chown -R www-data:www-data ${WEBSITE_DIR}"
    echo ""
    
    read -p "Deploy website now? (y/N): " deploy
    if [[ "$deploy" =~ ^[Yy]$ ]]; then
        sudo mkdir -p "${WEBSITE_DIR}"
        sudo cp -r "${SCRIPT_DIR}/botkonzept-website/"* "${WEBSITE_DIR}/"
        sudo chown -R www-data:www-data "${WEBSITE_DIR}"
        print_success "Website deployed to ${WEBSITE_DIR}"
    else
        print_info "Skipping website deployment"
    fi
    
    echo ""
}

# Test setup
test_setup() {
    print_header "Testing Setup"
    
    # Test database
    print_info "Testing database connection..."
    if PGPASSWORD="$SUPABASE_PASSWORD" psql -h "$SUPABASE_HOST" -p "$SUPABASE_PORT" -U "$SUPABASE_USER" -d "$SUPABASE_DB" -c "SELECT COUNT(*) FROM customers" >/dev/null 2>&1; then
        print_success "Database accessible"
    else
        print_error "Database not accessible"
    fi
    
    # Test n8n webhook
    print_info "Testing n8n webhook..."
    local webhook_url="https://${N8N_HOST}/webhook/botkonzept-registration"
    local response=$(curl -s -o /dev/null -w "%{http_code}" -X POST "$webhook_url" \
        -H "Content-Type: application/json" \
        -d '{"test": true}' 2>/dev/null || echo "000")
    
    if [[ "$response" == "200" ]] || [[ "$response" == "400" ]]; then
        print_success "n8n webhook accessible (HTTP $response)"
    else
        print_warning "n8n webhook returned HTTP $response"
    fi
    
    # Test website
    if [[ -d "$WEBSITE_DIR" ]]; then
        print_success "Website directory exists"
    else
        print_warning "Website not deployed yet"
    fi
    
    echo ""
}

# Generate summary
generate_summary() {
    print_header "Setup Summary"
    
    echo -e "${GREEN}✓ BotKonzept setup completed!${NC}"
    echo ""
    echo "Next steps:"
    echo ""
    echo "1. Configure DNS:"
    echo "   - Point botkonzept.de to your web server"
    echo "   - Configure SSL certificate (Let's Encrypt)"
    echo ""
    echo "2. Test registration:"
    echo "   - Visit https://botkonzept.de"
    echo "   - Fill out registration form"
    echo "   - Check email for welcome message"
    echo ""
    echo "3. Monitor workflows:"
    echo "   - n8n: https://${N8N_HOST}"
    echo "   - Check executions for errors"
    echo ""
    echo "4. Database access:"
    echo "   - Host: ${SUPABASE_HOST}"
    echo "   - Database: ${SUPABASE_DB}"
    echo "   - User: ${SUPABASE_USER}"
    echo ""
    echo "5. Useful queries:"
    echo "   - View customers: SELECT * FROM customer_overview;"
    echo "   - View trials: SELECT * FROM trials_expiring_soon;"
    echo "   - View emails: SELECT * FROM emails_sent ORDER BY sent_at DESC LIMIT 10;"
    echo ""
    echo "Documentation: ${SCRIPT_DIR}/BOTKONZEPT_README.md"
    echo ""
}

# Main execution
main() {
    clear
    print_header "BotKonzept Setup"
    
    echo "This script will set up the complete BotKonzept platform."
    echo ""
    echo "Components:"
    echo "  - PostgreSQL database schema"
    echo "  - n8n workflows (manual import)"
    echo "  - Website files"
    echo ""
    
    read -p "Continue? (y/N): " confirm
    if [[ ! "$confirm" =~ ^[Yy]$ ]]; then
        echo "Setup cancelled."
        exit 0
    fi
    
    echo ""
    
    check_prerequisites
    setup_database
    setup_n8n_workflows
    setup_website
    test_setup
    generate_summary
}

# Run main function
main "$@"