#!/usr/bin/env bash
set -euo pipefail

# Voraussetzungen:
# - GITHUB_TOKEN
# - GITHUB_OWNER
# - GITHUB_REPO
# - TAG
# - WORKDIR (z. B. /tmp/gitea_release_v0.1.0)

VERBOSE="${VERBOSE:-false}"
CURL_BASE="curl -s"

# Funktion zur bedingten curl-Ausgabe
curl_exec() {
  if [[ "$VERBOSE" == "true" ]]; then
    curl -v "$@"
  else
    curl -s "$@"
  fi
}


if [[ -z "${TAG:-}" ]]; then
  echo "❌ TAG is not set."
  exit 1
fi

GITHUB_API_URL="https://api.github.com"
RELEASE_JSON="$WORKDIR/release.json"
ASSETS_DIR="$WORKDIR/assets"

if [[ ! -f "$RELEASE_JSON" ]]; then
  echo "❌ $RELEASE_JSON nicht gefunden."
  exit 1
fi

RELEASE_NAME=$(jq -r '.name' "$RELEASE_JSON")
RELEASE_BODY=$(jq -r '.body' "$RELEASE_JSON")
RELEASE_DRAFT=$(jq -r '.draft' "$RELEASE_JSON")
RELEASE_PRERELEASE=$(jq -r '.prerelease' "$RELEASE_JSON")

RESPONSE_FILE=$(mktemp)
HTTP_CODE=$(curl -s -w "%{http_code}" -o "$RESPONSE_FILE" \
  -H "Authorization: token $GITHUB_TOKEN" \
  "$GITHUB_API_URL/repos/$GITHUB_OWNER/$GITHUB_REPO/releases/tags/$TAG" || true)

if [[ "$HTTP_CODE" == "200" ]]; then
  EXISTING_RELEASE=$(cat "$RESPONSE_FILE")
  RELEASE_ID=$(echo "$EXISTING_RELEASE" | jq -r '.id')
  echo "📝 Release $TAG existiert bereits (ID: $RELEASE_ID), wird aktualisiert."

  echo "$EXISTING_RELEASE" | jq -c '.assets[]?' | while read -r asset; do
    ASSET_ID=$(echo "$asset" | jq -r '.id')
    NAME=$(echo "$asset" | jq -r '.name')
    echo "❌ Lösche bestehendes Asset: $NAME ($ASSET_ID)"
    curl_exec -X DELETE \
      -H "Authorization: token $GITHUB_TOKEN" \
      "$GITHUB_API_URL/repos/$GITHUB_OWNER/$GITHUB_REPO/releases/assets/$ASSET_ID"
  done

  echo "🔄 Aktualisiere Release-Metadaten ..."
  curl_exec -X PATCH \
    -H "Authorization: token $GITHUB_TOKEN" \
    -H "Content-Type: application/json" \
    -d "$(jq -n \
      --arg name "$RELEASE_NAME" \
      --arg body "$RELEASE_BODY" \
      --arg tag "$TAG" \
      --argjson draft "$RELEASE_DRAFT" \
      --argjson prerelease "$RELEASE_PRERELEASE" \
      '{name: $name, body: $body, draft: $draft, prerelease: $prerelease, tag_name: $tag}')" \
    "$GITHUB_API_URL/repos/$GITHUB_OWNER/$GITHUB_REPO/releases/$RELEASE_ID"

else
  echo "📦 Release $TAG existiert nicht – wird erstellt (HTTP $HTTP_CODE)."
  echo "Antwort: $(cat "$RESPONSE_FILE")"

  echo "🚀 Erstelle neuen Release ..."
  CREATE_RESPONSE=$(curl_exec -X POST \
    -H "Authorization: token $GITHUB_TOKEN" \
    -H "Content-Type: application/json" \
    -d "$(jq -n \
      --arg tag "$TAG" \
      --arg name "$RELEASE_NAME" \
      --arg body "$RELEASE_BODY" \
      --argjson draft "$RELEASE_DRAFT" \
      --argjson prerelease "$RELEASE_PRERELEASE" \
      '{tag_name: $tag, name: $name, body: $body, draft: $draft, prerelease: $prerelease}')" \
    "$GITHUB_API_URL/repos/$GITHUB_OWNER/$GITHUB_REPO/releases")

  RELEASE_ID=$(echo "$CREATE_RESPONSE" | jq -r '.id')
fi

UPLOAD_URL="https://uploads.github.com/repos/$GITHUB_OWNER/$GITHUB_REPO/releases/$RELEASE_ID/assets"

for file in "$ASSETS_DIR"/*; do
  FILENAME=$(basename "$file")
  echo "⬆ Lade Asset $FILENAME hoch ..."
  curl_exec -X POST \
    -H "Authorization: token $GITHUB_TOKEN" \
    -H "Content-Type: application/octet-stream" \
    --data-binary "@$file" \
    "$UPLOAD_URL?name=$FILENAME"
done

echo "✅ Release $TAG ist nun auf GitHub aktuell."