#!/bin/bash
set -e
#set -x # дебаг

echo "Starting release sync..."
REPO_FILE="${REPO_LIST_FILE:-repos_to_sync.txt}"

# --- Проверки Переменных ---
echo "--- Variable Checks ---"
if [ -z "$GITEA_URL" ]; then echo "FATAL: GITEA_URL is empty!"; exit 1; fi
echo "GITEA_URL check: OK (value hidden)"
if [ -z "$GITEA_TOKEN" ]; then echo "FATAL: GITEA_TOKEN is empty!"; exit 1; fi
echo "GITEA_TOKEN check: OK (value hidden)"
if [ ! -f "$REPO_FILE" ]; then echo "FATAL: File '$REPO_FILE' not found!"; exit 1; fi
echo "REPO_FILE check: OK ($REPO_FILE)"
echo "--- End Variable Checks ---"

GITEA_AUTH_HEADER="Authorization: token ${GITEA_TOKEN}"

# Используем echo | sed для совместимости
echo "Calculating GITEA_BASE_URL from GITEA_URL..."
GITEA_BASE_URL=$(echo "${GITEA_URL}" | sed 's|/api/v1$||; s|/*$||')
if [ -z "$GITEA_BASE_URL" ]; then
     echo "FATAL: GITEA_BASE_URL is empty after sed processing GITEA_URL='${GITEA_URL}'!"
     exit 1
fi
GITEA_API_URL="${GITEA_BASE_URL}/api/v1"
echo "Calculated Gitea Base URL: ${GITEA_BASE_URL}"
echo "Calculated Gitea API URL: ${GITEA_API_URL}"

GITHUB_AUTH_HEADER=""
if [ -n "$GITHUB_TOKEN" ]; then GITHUB_AUTH_HEADER="Authorization: token ${GITHUB_TOKEN}"; fi
GITHUB_API_URL="https://api.github.com"

# --- Вспомогательные функции ---
download_asset() { local url="$1"; local filename="$2"; echo "Downloading asset: $filename"; curl -L -H "$GITHUB_AUTH_HEADER" -o "$filename" "$url"; return $?; }
upload_asset() {
  local repo="$1"; local id="$2"; local file="$3"
  local filename_basename=$(basename "$file")
  echo "Uploading asset: $file (as $filename_basename)"
  local TARGET_URL="${GITEA_API_URL}/repos/${repo}/releases/${id}/assets?name=${filename_basename}"
  echo "DEBUG: Upload Asset URL: ${TARGET_URL}"
  curl -sf --fail -X POST -H "$GITEA_AUTH_HEADER" -H "Content-Type: application/octet-stream" --data-binary "@$file" "${TARGET_URL}"
  local status=$?; if [ $status -eq 0 ]; then rm "$file"; fi; return $status;
}

# --- Основной цикл ---
echo "Reading repository list from $REPO_FILE"
while IFS= read -r repo_pair || [[ -n "$repo_pair" ]]; do
  if [[ -z "$repo_pair" || "$repo_pair" == \#* ]]; then continue; fi
  if ! echo "$repo_pair" | grep -q ':'; then echo "Warning: Skipping invalid line: $repo_pair"; continue; fi

  GITHUB_REPO_PATH=$(echo "$repo_pair" | cut -d':' -f1); GITEA_REPO_PATH=$(echo "$repo_pair" | cut -d':' -f2)
  echo "-------------------------------------"; echo "Syncing: $GITHUB_REPO_PATH -> $GITEA_REPO_PATH"

  FETCH_GITEA_URL="${GITEA_API_URL}/repos/${GITEA_REPO_PATH}/releases"
  echo "DEBUG: Fetch Gitea Releases URL: ${FETCH_GITEA_URL}"
  echo "Fetching Gitea releases...";
  GITEA_RELEASES_JSON=$(curl -sf --fail -H "$GITEA_AUTH_HEADER" "${FETCH_GITEA_URL}") || { echo "Error Gitea fetch: $GITEA_REPO_PATH"; continue; }
  EXISTING_GITEA_TAGS=$(echo "$GITEA_RELEASES_JSON" | jq -r '.[].tag_name')
   
  # Запрос к GitHub API (возвращаем -sf --fail)
  FETCH_GITHUB_URL="${GITHUB_API_URL}/repos/${GITHUB_REPO_PATH}/releases?per_page=20"
  echo "DEBUG: Fetch GitHub Releases URL: ${FETCH_GITHUB_URL}" # Отладка URL полезна
  echo "Fetching GitHub releases...";
  GITHUB_RELEASES_JSON=$(curl -sf --fail -H "$GITHUB_AUTH_HEADER" "${FETCH_GITHUB_URL}") || { echo "Error GitHub fetch: $GITHUB_REPO_PATH"; continue; }
  # --- Конец запроса к GitHub ---

  echo "$GITHUB_RELEASES_JSON" | jq -c '.[] | select(.draft == false)' | tac | while IFS= read -r release_json; do
    TAG_NAME=$(echo "$release_json" | jq -r '.tag_name')
    if echo "$EXISTING_GITEA_TAGS" | grep -q -x -F "$TAG_NAME"; then continue; fi
    echo ">>> New release: $TAG_NAME"; RELEASE_NAME=$(echo "$release_json" | jq -r '.name'); RELEASE_BODY=$(echo "$release_json" | jq -r '.body // ""'); IS_PRERELEASE=$(echo "$release_json" | jq -r '.prerelease'); ASSETS=$(echo "$release_json" | jq -c '.assets[]')

    CREATE_GITEA_URL="${GITEA_API_URL}/repos/${GITEA_REPO_PATH}/releases"
    echo "DEBUG: Create Gitea Release URL: ${CREATE_GITEA_URL}"
    echo "Creating Gitea release $TAG_NAME...";
    CREATE_PAYLOAD=$(jq -n --arg t "$TAG_NAME" --arg n "$RELEASE_NAME" --arg b "$RELEASE_BODY" --argjson p "$IS_PRERELEASE" '{tag_name:$t, name:$n, body:$b, prerelease:$p}')
    GITEA_NEW_RELEASE_JSON=$(curl -sf --fail -X POST -H "$GITEA_AUTH_HEADER" -H "Content-Type: application/json" -d "$CREATE_PAYLOAD" "${CREATE_GITEA_URL}") || { echo "Error creating Gitea release $TAG_NAME (maybe tag not synced?). Skipping."; continue; }
    GITEA_RELEASE_ID=$(echo "$GITEA_NEW_RELEASE_JSON" | jq -r '.id'); echo "Gitea release ID: $GITEA_RELEASE_ID"

    UPLOAD_FAILED_COUNT=0
    if [ -n "$ASSETS" ]; then
      echo "$ASSETS" | while IFS= read -r asset_json; do
        ASSET_NAME=$(echo "$asset_json" | jq -r '.name'); ASSET_URL=$(echo "$asset_json" | jq -r '.browser_download_url'); TMP_ASSET_FILE="asset_${ASSET_NAME}"
        if download_asset "$ASSET_URL" "$TMP_ASSET_FILE"; then if ! upload_asset "$GITEA_REPO_PATH" "$GITEA_RELEASE_ID" "$TMP_ASSET_FILE"; then ((UPLOAD_FAILED_COUNT++)); fi; else echo "Download failed: $ASSET_NAME"; ((UPLOAD_FAILED_COUNT++)); fi
      done
    else echo "No assets."; fi
    if [ $UPLOAD_FAILED_COUNT -eq 0 ]; then echo "Release $TAG_NAME sync OK."; else echo "Release $TAG_NAME sync processed, $UPLOAD_FAILED_COUNT asset errors."; fi
  done
  echo "Finished: $GITHUB_REPO_PATH -> $GITEA_REPO_PATH"; echo "-------------------------------------"
done < "$REPO_FILE"
echo "Release sync finished."