#!/bin/sh
set -e

# Generate main.cf from template with environment variables
envsubst < /etc/postfix/main.cf.template > /etc/postfix/main.cf

# Generate MySQL virtual alias config from template
envsubst < /etc/postfix/mysql_virtual_alias_maps.cf.template > /etc/postfix/mysql_virtual_alias_maps.cf

# Generate SASL password file from environment variables
envsubst < /etc/postfix/sasl_passwd.template > /etc/postfix/sasl_passwd

# Wait for MySQL to be ready
echo "Waiting for MySQL to be ready..."
for i in $(seq 1 30); do
    if nc -z ${MYSQL_HOST} ${MYSQL_PORT} 2>/dev/null; then
        echo "MySQL is ready!"
        break
    fi
    echo "Waiting for MySQL... ($i/30)"
    sleep 2
done

# Generate Postfix hash databases
postmap /etc/postfix/sasl_passwd
chmod 600 /etc/postfix/sasl_passwd /etc/postfix/sasl_passwd.db

# Regenerate sender_access database
postmap /etc/postfix/sender_access
chmod 644 /etc/postfix/sender_access /etc/postfix/sender_access.db

# Set permissions on MySQL config
chmod 644 /etc/postfix/mysql_virtual_alias_maps.cf

# Start Postfix in foreground
exec postfix start-fg