#!/bin/bash
# requeue-email.sh - Sendet eine E-Mail aus S3 manuell in die SQS Queue

set -e

# Parameter prüfen
if [ $# -lt 3 ]; then
    echo "Usage: $0 <S3_KEY> <FROM> <RECIPIENT>"
    echo ""
    echo "Example:"
    echo "  $0 rgskc3d59dqdm6lq1scenpuvdq7ikhi3cqk382g1 sender@example.com user@bayarea-cc.com"
    echo ""
    exit 1
fi

S3_KEY=$1
FROM=$2
RECIPIENT=$3

# Konfiguration
AWS_REGION="us-east-2"

# Domain aus Recipient extrahieren
DOMAIN=$(echo "$RECIPIENT" | cut -d'@' -f2)

# Bucket-Name aus Domain ableiten
BUCKET="${DOMAIN//./-}-emails"

# Queue-Name aus Domain ableiten
QUEUE_NAME="${DOMAIN//./-}-queue"

echo "==================================="
echo "Requeue E-Mail zu SQS Queue"
echo "==================================="
echo "S3 Key:     $S3_KEY"
echo "From:       $FROM"
echo "Recipient:  $RECIPIENT"
echo "Domain:     $DOMAIN"
echo "Bucket:     $BUCKET"
echo "Queue:      $QUEUE_NAME"
echo ""

# Prüfen ob S3 Object existiert
echo "Prüfe S3 Object..."
if ! aws s3api head-object \
    --bucket "$BUCKET" \
    --key "$S3_KEY" \
    --region "$AWS_REGION" &>/dev/null; then
    echo "ERROR: S3 Object nicht gefunden: s3://$BUCKET/$S3_KEY"
    exit 1
fi

echo "✓ S3 Object existiert"

# Queue URL ermitteln
echo "Ermittle Queue URL..."
QUEUE_URL=$(aws sqs get-queue-url \
    --queue-name "$QUEUE_NAME" \
    --region "$AWS_REGION" \
    --query 'QueueUrl' \
    --output text 2>/dev/null)

if [ -z "$QUEUE_URL" ]; then
    echo "ERROR: Queue nicht gefunden: $QUEUE_NAME"
    exit 1
fi

echo "✓ Queue URL: $QUEUE_URL"

# Optional: Subject aus E-Mail extrahieren
echo "Versuche Subject zu extrahieren..."
TEMP_FILE="/tmp/email-${S3_KEY}.eml"
aws s3 cp "s3://$BUCKET/$S3_KEY" "$TEMP_FILE" --region "$AWS_REGION" --quiet

SUBJECT=$(grep -m1 "^Subject:" "$TEMP_FILE" | sed 's/Subject: //' | head -c 200 || echo "(no subject)")
rm -f "$TEMP_FILE"

echo "Subject: $SUBJECT"
echo ""

# Message in Queue senden
echo "Sende Message in Queue..."
TIMESTAMP=$(date +%s)

RESPONSE=$(aws sqs send-message \
    --queue-url "$QUEUE_URL" \
    --region "$AWS_REGION" \
    --message-body "{
        \"bucket\": \"$BUCKET\",
        \"key\": \"$S3_KEY\",
        \"from\": \"$FROM\",
        \"recipient\": \"$RECIPIENT\",
        \"domain\": \"$DOMAIN\",
        \"subject\": \"$SUBJECT\",
        \"message_id\": \"$S3_KEY\",
        \"timestamp\": $TIMESTAMP
    }" \
    --message-attributes "{
        \"domain\": {\"StringValue\": \"$DOMAIN\", \"DataType\": \"String\"},
        \"bucket\": {\"StringValue\": \"$BUCKET\", \"DataType\": \"String\"},
        \"recipient\": {\"StringValue\": \"$RECIPIENT\", \"DataType\": \"String\"},
        \"message_id\": {\"StringValue\": \"$S3_KEY\", \"DataType\": \"String\"}
    }")

MESSAGE_ID=$(echo "$RESPONSE" | jq -r '.MessageId')

echo ""
echo "==================================="
echo "✅ E-Mail erfolgreich in Queue"
echo "==================================="
echo "SQS Message ID: $MESSAGE_ID"
echo "Queue:          $QUEUE_NAME"
echo ""
echo "Der Worker wird die E-Mail in Kürze verarbeiten."