#!/usr/bin/env bash
# Upload all files in a directory as attachments on a Gitea release (create release if missing).
#
# Usage:
#   export GITEA_BASE_URL=https://git.example.com
#   export GITEA_TOKEN=gta_...
#   export GITEA_OWNER=myorg
#   export GITEA_REPO=fractured-patches
#   export GITEA_TARGET_REF=main   # optional, used when creating a new release (tag must not exist yet)
#   ./upload-release-to-gitea.sh /path/to/combined v1.0.0
#
set -euo pipefail

SCRIPT_DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
# shellcheck source=release-sync-filters.sh
. "$SCRIPT_DIR/release-sync-filters.sh"

COMBINED_DIR="${1:?first arg: directory of files to attach}"
TAG="${2:?second arg: release tag (e.g. v1.0.0)}"

: "${GITEA_BASE_URL:?Set GITEA_BASE_URL (no trailing slash required)}"
: "${GITEA_TOKEN:?Set GITEA_TOKEN}"
: "${GITEA_OWNER:?Set GITEA_OWNER}"
: "${GITEA_REPO:?Set GITEA_REPO}"

BASE="${GITEA_BASE_URL%/}"
API="$BASE/api/v1"
TARGET="${GITEA_TARGET_REF:-main}"
AUTH_H=(-H "Authorization: token ${GITEA_TOKEN}" -H "Accept: application/json")

TAG_ENC=$(python3 -c "import urllib.parse,sys; print(urllib.parse.quote(sys.argv[1], safe=''))" "$TAG")
REL_JSON=$(mktemp)
trap 'rm -f "$REL_JSON"' EXIT

code=$(curl -sS -o "$REL_JSON" -w "%{http_code}" "${AUTH_H[@]}" \
  "$API/repos/${GITEA_OWNER}/${GITEA_REPO}/releases/tags/${TAG_ENC}")

if [ "$code" = "200" ]; then
  rel_id=$(jq -r '.id' "$REL_JSON")
elif [ "$code" = "404" ]; then
  body=$(jq -n \
    --arg tag "$TAG" \
    --arg name "Fractured $TAG" \
    --arg body "Synced from GitHub Actions (Fractured)." \
    --arg target "$TARGET" \
    '{tag_name:$tag,name:$name,body:$body,draft:false,prerelease:false,target_commitish:$target}')
  code=$(curl -sS -o "$REL_JSON" -w "%{http_code}" -X POST "${AUTH_H[@]}" \
    -H "Content-Type: application/json" \
    -d "$body" \
    "$API/repos/${GITEA_OWNER}/${GITEA_REPO}/releases")
  if [ "$code" != "201" ] && [ "$code" != "200" ]; then
    echo "Gitea create release failed HTTP $code:" >&2
    cat "$REL_JSON" >&2
    if [ "$code" = "422" ] && jq -e '.message == "repo is empty"' "$REL_JSON" >/dev/null 2>&1; then
      echo >&2
      echo "Gitea does not allow releases on a repo with zero commits. Fix: push at least one commit" >&2
      echo "to ${GITEA_OWNER}/${GITEA_REPO} (e.g. add README.md on branch ${TARGET} via web UI or git push)," >&2
      echo "or set Actions variable GITEA_TARGET_REF to an existing default branch name." >&2
    fi
    exit 1
  fi
  rel_id=$(jq -r '.id' "$REL_JSON")
else
  echo "Gitea GET release by tag failed HTTP $code:" >&2
  cat "$REL_JSON" >&2
  exit 1
fi

if [ -z "$rel_id" ] || [ "$rel_id" = "null" ]; then
  echo "Could not resolve Gitea release id" >&2
  exit 1
fi

shopt -s nullglob
files=("$COMBINED_DIR"/*)
if [ "${#files[@]}" -eq 0 ]; then
  echo "No files in $COMBINED_DIR" >&2
  exit 1
fi

uploadable=0
for f in "${files[@]}"; do
  [ -f "$f" ] || continue
  bn=$(basename "$f")
  if should_skip_gitea_upload "$bn"; then
    continue
  fi
  uploadable=$((uploadable + 1))
done
if [ "$uploadable" -eq 0 ]; then
  echo "No files to upload after exclusions (check $COMBINED_DIR) — not clearing Gitea attachments." >&2
  exit 1
fi

while read -r aid; do
  [ -z "$aid" ] || [ "$aid" = "null" ] && continue
  curl -fsS -X DELETE "${AUTH_H[@]}" \
    "$API/repos/${GITEA_OWNER}/${GITEA_REPO}/releases/${rel_id}/assets/${aid}" || true
done < <(jq -r '(.attachments // .assets // [])[] | .id' "$REL_JSON")

uploaded=0
for f in "${files[@]}"; do
  [ -f "$f" ] || continue
  bn=$(basename "$f")
  if should_skip_gitea_upload "$bn"; then
    echo "Skipping upload (excluded): $bn"
    continue
  fi
  echo "Uploading $bn …"
  curl -fsS -X POST "${AUTH_H[@]}" \
    -F "attachment=@${f}" \
    "$API/repos/${GITEA_OWNER}/${GITEA_REPO}/releases/${rel_id}/assets"
  uploaded=$((uploaded + 1))
done

echo "Gitea release $TAG (id=$rel_id) updated with $uploaded file(s)."