#!/bin/bash

# =============================================================================
# TSYS Developer Support Stack - Demo Deployment Script
# =============================================================================
# 
# This script dynamically detects user environment and deploys the demo stack
# with proper permissions, naming conventions, and security settings.
#
# Usage: ./demo-stack.sh [deploy|stop|restart|status]
# =============================================================================

set -euo pipefail

# =============================================================================
# CONFIGURATION
# =============================================================================

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

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

# =============================================================================
# DYNAMIC DETECTION
# =============================================================================

echo -e "${BLUE}🔍 Detecting environment...${NC}"

# Load environment variables
# shellcheck source=demo.env
if [[ -f "demo.env" ]]; then
    set -a
    source demo.env
    set +a
    echo -e "${GREEN}✅ Loaded demo.env${NC}"
else
    echo -e "${RED}❌ demo.env not found!${NC}"
    exit 1
fi

# Dynamic user and group detection
APP_UID=$(id -u)
export APP_UID
APP_GID=$(id -g)
export APP_GID
DOCKER_GID=$(getent group docker 2>/dev/null | cut -d: -f3 || echo "972")
export DOCKER_GID

echo -e "${GREEN}👤 User ID: ${APP_UID}${NC}"
echo -e "${GREEN}👥 Group ID: ${APP_GID}${NC}"
echo -e "${GREEN}🐳 Docker Group ID: ${DOCKER_GID}${NC}"

# Validate docker group access
if ! groups | grep -q docker; then
    echo -e "${YELLOW}⚠️  Warning: User not in docker group${NC}"
    echo -e "${YELLOW}   Docker socket proxy may not work correctly${NC}"
fi

# =============================================================================
# FUNCTIONS
# =============================================================================

deploy_stack() {
    echo -e "${BLUE}🚀 Deploying TSYS Developer Support Stack Demo...${NC}"
    
    # Generate docker-compose.yml from template
    if [[ -f "docker-compose.yml.template" ]]; then
        echo -e "${BLUE}📝 Generating docker-compose.yml...${NC}"
        envsubst < docker-compose.yml.template > docker-compose.yml
        echo -e "${GREEN}✅ docker-compose.yml generated${NC}"
    else
        echo -e "${RED}❌ docker-compose.yml.template not found!${NC}"
        exit 1
    fi
    
    # Network will be created by docker compose
    echo -e "${BLUE}🌐 Docker network will be created by compose...${NC}"
    
    # Deploy services
    echo -e "${BLUE}🐳 Starting services...${NC}"
    docker compose up -d
    
    echo -e "${GREEN}✅ Stack deployed successfully!${NC}"
    echo -e "${BLUE}🌐 Access Homepage at: http://localhost:${HOMEPAGE_PORT}${NC}"
}

stop_stack() {
    echo -e "${YELLOW}🛑 Stopping TSYS Developer Support Stack Demo...${NC}"
    docker compose down
    echo -e "${GREEN}✅ Stack stopped${NC}"
}

restart_stack() {
    echo -e "${BLUE}🔄 Restarting TSYS Developer Support Stack Demo...${NC}"
    stop_stack
    sleep 2
    deploy_stack
}

show_status() {
    echo -e "${BLUE}📊 Stack Status:${NC}"
    docker compose ps
    
    echo -e "${BLUE}🌐 Service URLs:${NC}"
    echo -e "${GREEN}   Homepage: http://localhost:${HOMEPAGE_PORT}${NC}"
    echo -e "${GREEN}   Atomic Tracker: http://localhost:${ATOMIC_TRACKER_PORT}${NC}"
    echo -e "${GREEN}   Wakapi: http://localhost:${WAKAPI_PORT}${NC}"
    echo -e "${GREEN}   MailHog: http://localhost:${MAILHOG_WEB_PORT}${NC}"
    echo -e "${GREEN}   Atuin: http://localhost:${ATUIN_PORT}${NC}"
    echo -e "${GREEN}   Grafana: http://localhost:${GRAFANA_PORT}${NC}"
    echo -e "${GREEN}   Portainer: http://localhost:${PORTAINER_PORT}${NC}"
}

show_help() {
    echo -e "${BLUE}TSYS Developer Support Stack - Demo Deployment${NC}"
    echo ""
    echo -e "${YELLOW}Usage:${NC} $0 [command]"
    echo ""
    echo -e "${YELLOW}Commands:${NC}"
    echo -e "  ${GREEN}deploy${NC}     Deploy the demo stack"
    echo -e "  ${GREEN}stop${NC}       Stop all services"
    echo -e "  ${GREEN}restart${NC}    Restart all services"
    echo -e "  ${GREEN}status${NC}     Show service status and URLs"
    echo -e "  ${GREEN}help${NC}       Show this help message"
    echo ""
    echo -e "${YELLOW}Examples:${NC}"
    echo -e "  $0 deploy"
    echo -e "  $0 status"
}

# =============================================================================
# MAIN EXECUTION
# =============================================================================

case "${1:-help}" in
    deploy)
        deploy_stack
        ;;
    stop)
        stop_stack
        ;;
    restart)
        restart_stack
        ;;
    status)
        show_status
        ;;
    help|--help|-h)
        show_help
        ;;
    *)
        echo -e "${RED}❌ Unknown command: $1${NC}"
        show_help
        exit 1
        ;;
esac