#!/bin/bash

# Script to add Omada environment variables to existing .env file

set -e

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

ENV_FILE="$PROJECT_ROOT/.env"
ENV_EXAMPLE="$PROJECT_ROOT/env.example"

if [ ! -f "$ENV_FILE" ]; then
    echo "❌ .env file not found. Creating from template..."
    cp "$ENV_EXAMPLE" "$ENV_FILE"
    echo "✅ Created .env file. Please edit it with your credentials."
    exit 0
fi

echo "Adding Omada environment variables to existing .env file..."

# Check if variables already exist
OMADA_VARS=(
    "OMADA_USERNAME"
    "OMADA_PASSWORD"
    "OMADA_ID"
    "OMADA_CONTROLLER_BASE"
    "OMADA_NORTHBOUND_BASE"
    "DATABASE_URL"
    "JWT_SECRET"
    "PORT"
    "NODE_ENV"
    "LOG_LEVEL"
    "SYNC_JOB_SCHEDULE"
    "LICENSE_JOB_SCHEDULE"
)

# Read existing .env and check what's missing
MISSING_VARS=()
for var in "${OMADA_VARS[@]}"; do
    if ! grep -q "^${var}=" "$ENV_FILE" 2>/dev/null; then
        MISSING_VARS+=("$var")
    fi
done

if [ ${#MISSING_VARS[@]} -eq 0 ]; then
    echo "✅ All Omada environment variables are already present in .env"
    exit 0
fi

echo "Found ${#MISSING_VARS[@]} missing variable(s): ${MISSING_VARS[*]}"
echo ""

# Append missing variables from template
echo "" >> "$ENV_FILE"
echo "# ============================================" >> "$ENV_FILE"
echo "# Omada Cloud Integration Variables" >> "$ENV_FILE"
echo "# ============================================" >> "$ENV_FILE"

# Extract and add missing variables from env.example
while IFS= read -r line; do
    # Skip comments and empty lines
    [[ "$line" =~ ^[[:space:]]*# ]] && continue
    [[ -z "${line// }" ]] && continue
    
    # Extract variable name
    var_name=$(echo "$line" | cut -d'=' -f1)
    
    # Check if this variable is missing
    if [[ " ${MISSING_VARS[@]} " =~ " ${var_name} " ]]; then
        echo "$line" >> "$ENV_FILE"
    fi
done < "$ENV_EXAMPLE"

echo "✅ Added missing Omada environment variables to .env"
echo ""
echo "📝 Please edit .env and fill in the actual values for:"
for var in "${MISSING_VARS[@]}"; do
    echo "   - $var"
done
echo ""