#!/bin/sh
set -e

# =============================================================================
# Docker Entrypoint Script
# =============================================================================
# Handles runtime setup before starting the application:
# - Waits for database and cache dependencies
# - Decodes SF_PRIVATE_KEY_BASE64 to file if provided
# - Runs Prisma migrations if RUN_MIGRATIONS=true
# =============================================================================

echo "🚀 Starting Customer Portal Backend..."
echo "   Version: ${APP_VERSION:-unknown}"
echo "   Node: $(node --version)"

PRISMA_VERSION="${PRISMA_VERSION:-7.1.0}"
export PRISMA_SCHEMA_PATH="/app/prisma/schema.prisma"

# =============================================================================
# Salesforce Private Key Handling
# =============================================================================
if [ -n "$SF_PRIVATE_KEY_BASE64" ]; then
    echo "📝 Decoding Salesforce private key..."
    mkdir -p /app/secrets
    echo "$SF_PRIVATE_KEY_BASE64" | base64 -d > /app/secrets/sf-private.key
    chmod 600 /app/secrets/sf-private.key
    export SF_PRIVATE_KEY_PATH=/app/secrets/sf-private.key
    echo "✅ Salesforce private key configured"
fi

# =============================================================================
# Wait for Dependencies
# =============================================================================
# Maximum wait time in seconds
MAX_WAIT="${MAX_WAIT:-120}"

wait_for_service() {
    local host="$1"
    local port="$2"
    local name="$3"
    local waited=0
    
    echo "⏳ Waiting for $name ($host:$port)..."
    
    while ! nc -z "$host" "$port" 2>/dev/null; do
        waited=$((waited + 2))
        if [ $waited -ge "$MAX_WAIT" ]; then
            echo "❌ Timeout waiting for $name after ${MAX_WAIT}s"
            return 1
        fi
        sleep 2
    done
    
    echo "✅ $name is ready (waited ${waited}s)"
    return 0
}

# Wait for database if DATABASE_URL is set
# Extract host:port from postgresql://user:pass@host:port/db
if [ -n "$DATABASE_URL" ]; then
    DB_HOST=$(echo "$DATABASE_URL" | sed -E 's|.*@([^:/]+):([0-9]+)/.*|\1|')
    DB_PORT=$(echo "$DATABASE_URL" | sed -E 's|.*@([^:/]+):([0-9]+)/.*|\2|')
    
    if [ -n "$DB_HOST" ] && [ -n "$DB_PORT" ]; then
        if ! wait_for_service "$DB_HOST" "$DB_PORT" "database"; then
            echo "⚠️  Starting without database connection - some features may not work"
        fi
    fi
fi

# Wait for Redis if REDIS_URL is set
# Extract host:port from redis://host:port/db or redis://:password@host:port/db
if [ -n "$REDIS_URL" ]; then
    # Handle both redis://host:port and redis://:password@host:port formats
    REDIS_HOST=$(echo "$REDIS_URL" | sed -E 's|redis://([^:@]+@)?([^:/]+):([0-9]+).*|\2|')
    REDIS_PORT=$(echo "$REDIS_URL" | sed -E 's|redis://([^:@]+@)?([^:/]+):([0-9]+).*|\3|')
    
    if [ -n "$REDIS_HOST" ] && [ -n "$REDIS_PORT" ]; then
        if ! wait_for_service "$REDIS_HOST" "$REDIS_PORT" "cache"; then
            echo "⚠️  Starting without Redis connection - some features may not work"
        fi
    fi
fi

# =============================================================================
# Database Migrations
# =============================================================================
if [ "$RUN_MIGRATIONS" = "true" ] && [ -n "$DATABASE_URL" ]; then
    echo "🗄️  Running database migrations..."
    
    # Set Prisma schema path for migration
    export PRISMA_SCHEMA_PATH="/app/prisma/schema.prisma"
    
    # Change to app directory where schema is located
    cd /app
    
    if pnpm dlx prisma@"${PRISMA_VERSION}" migrate deploy; then
        echo "✅ Migrations complete"
    else
        echo "⚠️  Migration failed - check database connectivity"
        # Continue anyway in case migrations are already applied
    fi
fi

# =============================================================================
# Start Application
# =============================================================================
echo "🌐 Starting server on port ${PORT:-4000}..."
echo "   Environment: ${NODE_ENV:-development}"
echo "   Log level: ${LOG_LEVEL:-info}"
echo ""

# Execute the main command (node dist/main.js)
exec "$@"