#!/usr/bin/env bash
# lib-forgejo.sh — Forgejo/Gitea release API helpers shared by the pangolin
# release pipelines (website / server / client). `source` this after _env.sh.
#
# Provides:
#   forgejo_release_ensure <tag> <title>  -> looks up or creates the release
#                                            for <tag>; sets/exports RELEASE_ID
#   forgejo_upload_asset <tag> <file>     -> uploads one asset to that release
#
# Requires env: FORGEJO_URL, FORGEJO_TOKEN, FORGEJO_REPO (see _env.sh for the
# default FORGEJO_REPO=wangjia/pangolin).
#
# No command substitution ($()) is used anywhere: HTTP status codes and JSON
# fields are written to temp files by curl/python3 and read back with `read`.
#
# TLS verification is ON by default. Opt-outs (env-driven, resolved once below
# into the FORGEJO_CURL_TLS array and spliced into every curl call):
#   FORGEJO_CA_BUNDLE=<path>  -> verify against this CA bundle (--cacert)
#   FORGEJO_INSECURE=1        -> disable verification (-k), for self-signed
#                                internal CAs only; explicit opt-in required.

: "${FORGEJO_REPO:=wangjia/pangolin}"

FORGEJO_CURL_TLS=()
if [ -n "${FORGEJO_CA_BUNDLE:-}" ]; then
  FORGEJO_CURL_TLS=(--cacert "$FORGEJO_CA_BUNDLE")
else
  case "${FORGEJO_INSECURE:-}" in
    1 | true | yes)
      FORGEJO_CURL_TLS=(-k)
      ;;
    *)
      FORGEJO_CURL_TLS=()
      ;;
  esac
fi

# forgejo_release_ensure <tag> <title>
forgejo_release_ensure() {
  local tag="$1" title="$2"
  local get_code_file get_body_file get_code

  get_code_file="/tmp/forgejo_get_code.$$"
  get_body_file="/tmp/forgejo_get_body.$$.json"

  curl ${FORGEJO_CURL_TLS[@]+"${FORGEJO_CURL_TLS[@]}"} -s --max-time 60 --retry 2 --retry-connrefused -o "$get_body_file" -w '%{http_code}' \
    -H "Authorization: token ${FORGEJO_TOKEN}" \
    "${FORGEJO_URL}/api/v1/repos/${FORGEJO_REPO}/releases/tags/${tag}" \
    > "$get_code_file"
  # `|| true`: curl -w '%{http_code}' 写入的值无结尾换行,read 到无换行 EOF 返回 1
  # (值已赋)→ set -e 会静默中止。容错该退出码;文件恒由上面的 curl 创建,不掩盖真错。
  read -r get_code < "$get_code_file" || true
  rm -f "$get_code_file"

  if [ "$get_code" = "200" ]; then
    echo "==> forgejo: release ${tag} already exists"
    _forgejo_read_release_id "$get_body_file"
    rm -f "$get_body_file"
    return 0
  fi
  rm -f "$get_body_file"

  echo "==> forgejo: creating release ${tag}"
  local create_code_file create_body_file create_code create_req_file
  create_code_file="/tmp/forgejo_create_code.$$"
  create_body_file="/tmp/forgejo_create_body.$$.json"
  create_req_file="/tmp/forgejo_create_req.$$.json"

  # Build the JSON request body via python3's json.dumps rather than raw
  # string interpolation, so a tag/title containing `"` / `\` / control
  # characters can't break out of the JSON structure (json-injection guard).
  # Values are piped in NUL-separated on stdin — never interpolated into the
  # python source — and no $() command substitution is used.
  printf '%s\0%s\0' "$tag" "$title" | python3 -c '
import json
import sys

raw = sys.stdin.buffer.read()
tag, title = (part.decode() for part in raw.split(b"\0")[:2])
json.dump(
    {"tag_name": tag, "name": title, "draft": False, "prerelease": False},
    sys.stdout,
)
' > "$create_req_file"

  curl ${FORGEJO_CURL_TLS[@]+"${FORGEJO_CURL_TLS[@]}"} -s --max-time 60 -o "$create_body_file" -w '%{http_code}' \
    -X POST "${FORGEJO_URL}/api/v1/repos/${FORGEJO_REPO}/releases" \
    -H "Authorization: token ${FORGEJO_TOKEN}" \
    -H "Content-Type: application/json" \
    --data @"$create_req_file" \
    > "$create_code_file"
  read -r create_code < "$create_code_file" || true  # 无结尾换行,见 forgejo_release_ensure 注释
  rm -f "$create_code_file" "$create_req_file"

  if [ "$create_code" -lt 200 ] || [ "$create_code" -ge 300 ]; then
    echo "==> forgejo: release create FAILED (HTTP ${create_code})" >&2
    cat "$create_body_file" >&2
    rm -f "$create_body_file"
    return 1
  fi

  _forgejo_read_release_id "$create_body_file"
  rm -f "$create_body_file"
  echo "==> forgejo: release_id=${RELEASE_ID}"
}

# _forgejo_read_release_id <json_file> — internal: sets/exports RELEASE_ID.
_forgejo_read_release_id() {
  local json_file="$1" id_file
  id_file="/tmp/forgejo_release_id.$$"
  python3 -c "import json,sys; print(json.load(open(sys.argv[1]))['id'])" \
    "$json_file" > "$id_file"
  read -r RELEASE_ID < "$id_file" || true  # python 写入可能无结尾换行,见上注释
  rm -f "$id_file"
  export RELEASE_ID
}

# forgejo_upload_asset <tag> <file>
forgejo_upload_asset() {
  local tag="$1" file="$2"

  if [ -z "${RELEASE_ID:-}" ]; then
    forgejo_release_ensure "$tag" "$tag" || return 1
  fi

  local code_file body_file code
  code_file="/tmp/forgejo_upload_code.$$"
  body_file="/tmp/forgejo_upload_body.$$.json"

  curl ${FORGEJO_CURL_TLS[@]+"${FORGEJO_CURL_TLS[@]}"} -s --max-time 300 -o "$body_file" -w '%{http_code}' \
    -X POST "${FORGEJO_URL}/api/v1/repos/${FORGEJO_REPO}/releases/${RELEASE_ID}/assets" \
    -H "Authorization: token ${FORGEJO_TOKEN}" \
    -F "attachment=@${file}" \
    > "$code_file"
  read -r code < "$code_file" || true  # curl http_code 无结尾换行,见上注释
  rm -f "$code_file"

  echo "==> forgejo: uploaded ${file} (HTTP ${code})"
  if [ "$code" -lt 200 ] || [ "$code" -ge 300 ]; then
    cat "$body_file" >&2
    rm -f "$body_file"
    return 1
  fi
  rm -f "$body_file"
}