#!/bin/bash
# Usage: ./alert.sh "MESSAGE" [-i image_file] [-f html_file]
set -euo pipefail

PORT="${DASHBOARD_PORT:-3000}"

MESSAGE=""
HTML_FILE=""
IMAGE_FILE=""

while [[ $# -gt 0 ]]; do
  case "$1" in
    -i|--image) IMAGE_FILE="$2"; shift 2 ;;
    -f|--html)  HTML_FILE="$2";  shift 2 ;;
    -h|--help)  echo "Usage: $0 [\"MESSAGE\"] [-i image_file] [-f html_file]" >&2; exit 0 ;;
    -*) echo "Option inconnue : $1" >&2; exit 1 ;;
    *)  MESSAGE="$1"; shift ;;
  esac
done

if [ -z "$MESSAGE" ] && [ -z "$HTML_FILE" ] && [ -z "$IMAGE_FILE" ]; then
  echo "Usage: $0 [\"MESSAGE\"] [-i image_file] [-f html_file]" >&2
  exit 1
fi

TMPDIR_PAYLOAD=$(mktemp -d)
trap 'rm -rf "$TMPDIR_PAYLOAD"' EXIT

# HTML
HTML_TMP="$TMPDIR_PAYLOAD/html.txt"
if [ -n "$HTML_FILE" ] && [ -f "$HTML_FILE" ]; then
  cp "$HTML_FILE" "$HTML_TMP"
else
  printf '' > "$HTML_TMP"
fi

# Image : encodée en base64 dans un fichier temporaire (évite "Argument list too long")
IMAGE_TMP="$TMPDIR_PAYLOAD/image.txt"
if [ -n "$IMAGE_FILE" ] && [ -f "$IMAGE_FILE" ]; then
  case "${IMAGE_FILE##*.}" in
    jpg|jpeg) MIME="image/jpeg" ;;
    png)      MIME="image/png"  ;;
    gif)      MIME="image/gif"  ;;
    webp)     MIME="image/webp" ;;
    *)        MIME="image/png"  ;;
  esac
  printf 'data:%s;base64,' "$MIME" > "$IMAGE_TMP"
  base64 -i "$IMAGE_FILE" | tr -d '\n' >> "$IMAGE_TMP"
else
  printf '' > "$IMAGE_TMP"
fi

PAYLOAD_TMP="$TMPDIR_PAYLOAD/payload.json"
jq -n \
  --arg     msg   "$MESSAGE" \
  --rawfile html  "$HTML_TMP" \
  --rawfile image "$IMAGE_TMP" \
  '{"message":$msg,"html":$html,"image":$image}' > "$PAYLOAD_TMP"

curl -sf -X POST "http://localhost:${PORT}/api/alert" \
  -H "Content-Type: application/json" \
  -d "@$PAYLOAD_TMP" \
  && echo "✓ Alerte déclenchée : $MESSAGE" \
  || echo "✗ Serveur non disponible sur le port ${PORT}"