#!/bin/bash
set -euo pipefail

ROOT_DIR="$(cd "$(dirname "$0")/.." && pwd)"
BUILD_DIR="$ROOT_DIR/.build"
RELEASE_DIR="$BUILD_DIR/release"
APP_VERSION="${APP_VERSION:?Set APP_VERSION, for example 1.0.1}"
APP_BUILD="${APP_BUILD:?Set APP_BUILD to a monotonically increasing build number}"
GITEA_TOKEN="${GITEA_TOKEN:?Set GITEA_TOKEN with permission to create releases}"
GITEA_API="${GITEA_API:-https://git.maddin.app/api/v1}"
GITEA_REPO="${GITEA_REPO:-maddin/Tonuino-Manager}"
WEBSITE_HOST="${WEBSITE_HOST:-mln}"
WEBSITE_ROOT="${WEBSITE_ROOT:-/home/maddin/docker/tonuino-manager/site}"
FEED_URL="https://git.maddin.app/maddin/Tonuino-Manager/raw/branch/main/appcast.xml"
TAG="v$APP_VERSION"
ZIP_PATH="$RELEASE_DIR/Tonuino-Manager-$APP_VERSION.zip"
DMG_PATH="$RELEASE_DIR/Tonuino-Manager-$APP_VERSION-universal.dmg"
SIGN_UPDATE="${SPARKLE_SIGN_UPDATE:-$BUILD_DIR/DerivedData/SourcePackages/artifacts/sparkle/Sparkle/bin/sign_update}"

[[ -f "$ZIP_PATH" ]] || { echo "Missing Sparkle archive: $ZIP_PATH" >&2; exit 1; }
[[ -f "$DMG_PATH" ]] || { echo "Missing installer: $DMG_PATH" >&2; exit 1; }
[[ -x "$SIGN_UPDATE" ]] || { echo "Missing Sparkle sign_update: $SIGN_UPDATE" >&2; exit 1; }
command -v rsync >/dev/null || { echo "rsync is required" >&2; exit 1; }
command -v python3 >/dev/null || { echo "python3 is required" >&2; exit 1; }

cd "$ROOT_DIR"
git rev-parse --is-inside-work-tree >/dev/null 2>&1 || { echo "Run this from a Git checkout" >&2; exit 1; }
[[ "$(git branch --show-current)" == main ]] || { echo "Publish from the main branch" >&2; exit 1; }
[[ -z "$(git status --porcelain)" ]] || { echo "Commit or discard local changes before publishing" >&2; exit 1; }
git remote get-url origin >/dev/null 2>&1 || { echo "Configure origin to the Gitea repository first" >&2; exit 1; }

if git ls-remote --exit-code --tags origin "refs/tags/$TAG" >/dev/null 2>&1; then
  echo "Release tag $TAG already exists" >&2
  exit 1
fi

SIGNATURE="$("$SIGN_UPDATE" -p "$ZIP_PATH")"
ZIP_LENGTH="$(stat -f '%z' "$ZIP_PATH")"
RELEASE_URL="https://git.maddin.app/$GITEA_REPO/releases/download/$TAG/$(basename "$ZIP_PATH")"
APPCAST_TMP="$(mktemp)"
trap 'rm -f "$APPCAST_TMP"' EXIT
python3 - "$APPCAST_TMP" "$APP_VERSION" "$APP_BUILD" "$RELEASE_URL" "$ZIP_LENGTH" "$SIGNATURE" <<'PY'
import datetime, html, sys
path, version, build, url, length, signature = sys.argv[1:]
pubdate = datetime.datetime.now(datetime.timezone.utc).strftime("%a, %d %b %Y %H:%M:%S +0000")
item = f'''<item>
      <title>Version {html.escape(version)}</title>
      <pubDate>{pubdate}</pubDate>
      <sparkle:version>{html.escape(build)}</sparkle:version>
      <sparkle:shortVersionString>{html.escape(version)}</sparkle:shortVersionString>
      <enclosure url="{html.escape(url, quote=True)}" length="{int(length)}" type="application/octet-stream" sparkle:edSignature="{html.escape(signature, quote=True)}" />
    </item>'''
xml = f'''<?xml version="1.0" encoding="utf-8"?>
<rss version="2.0" xmlns:sparkle="http://www.andymatuschak.org/xml-namespaces/sparkle" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <channel>
    <title>Tonuino Manager Updates</title>
    <link>https://tonuino.maddin.app/</link>
    <description>Updates for Tonuino Manager for macOS</description>
    <language>de</language>
    {item}
  </channel>
</rss>
'''
open(path, "w", encoding="utf-8").write(xml)
PY

RELEASE_JSON="$(python3 - "$TAG" <<'PY'
import json, sys
tag = sys.argv[1]
print(json.dumps({"tag_name": tag, "target_commitish": "main", "name": "Tonuino Manager " + tag, "body": "Universal macOS-Version mit automatischen Sparkle-Updates.", "draft": False, "prerelease": False}))
PY
)"
RELEASE_RESPONSE="$(curl --fail-with-body --silent --show-error \
  -H "Authorization: token $GITEA_TOKEN" -H 'Content-Type: application/json' \
  -d "$RELEASE_JSON" "$GITEA_API/repos/$GITEA_REPO/releases")"
RELEASE_ID="$(python3 -c 'import json,sys; print(json.load(sys.stdin)["id"])' <<<"$RELEASE_RESPONSE")"

upload_asset() {
  local file="$1"
  curl --fail-with-body --silent --show-error -X POST \
    -H "Authorization: token $GITEA_TOKEN" \
    -F "attachment=@$file" \
    "$GITEA_API/repos/$GITEA_REPO/releases/$RELEASE_ID/assets?name=$(basename "$file")" >/dev/null
}
upload_asset "$ZIP_PATH"

cp "$APPCAST_TMP" "$ROOT_DIR/appcast.xml"
git add appcast.xml
git commit -m "Publish Sparkle appcast for $TAG"
git push origin main

SITE_STAGE="$(mktemp -d)"
trap 'rm -f "$APPCAST_TMP"; rm -rf "$SITE_STAGE"' EXIT
cp "$ROOT_DIR/website/icon.png" "$SITE_STAGE/icon.png"
python3 - "$ROOT_DIR/website/index.html.template" "$SITE_STAGE/index.html" "$APP_VERSION" <<'PY'
import html, sys
source, target, version = sys.argv[1:]
page = open(source, encoding="utf-8").read()
link = '<a class="download" href="/downloads/Tonuino-Manager.dmg">↓&nbsp; App für macOS laden</a>'
page = page.replace("<!-- DOWNLOAD_LINK -->", link)
page = page.replace("<!-- APP_VERSION -->", html.escape(version))
open(target, "w", encoding="utf-8").write(page)
PY
mkdir -p "$SITE_STAGE/downloads"
cp "$DMG_PATH" "$SITE_STAGE/downloads/Tonuino-Manager.dmg"
ssh "$WEBSITE_HOST" "mkdir -p '$WEBSITE_ROOT/downloads'"
rsync -az --delete "$SITE_STAGE/" "$WEBSITE_HOST:$WEBSITE_ROOT/"
echo "Published $TAG, Sparkle feed, and website download."