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

# --- Config ---
GITHUB_USER="andwati"
GITHUB_TOKEN="${GITHUB_TOKEN:?Set GITHUB_TOKEN env var (PAT with repo read access, incl. private repos)}"
GITEA_URL="${GITEA_URL:?Set GITEA_URL env var, e.g. https://gitea.andwati.com}"
GITEA_TOKEN="${GITEA_TOKEN:?Set GITEA_TOKEN env var (Gitea access token, repo scope)}"
GITEA_OWNER="${GITEA_OWNER:-andwati}"
MIRROR_INTERVAL="${MIRROR_INTERVAL:-8h0m0s}"

# --- Fetch all repos for the GitHub user (paginated), including private ones ---
# Uses /user/repos (authenticated, sees private repos owned by the token's user)
# rather than /users/{user}/repos (public-only).
page=1
repos_json="[]"
while :; do
  resp=$(curl -s -H "Authorization: token ${GITHUB_TOKEN}" \
    "https://api.github.com/user/repos?per_page=100&page=${page}&affiliation=owner")
  count=$(echo "$resp" | jq 'length')
  [ "$count" -eq 0 ] && break
  repos_json=$(jq -s '.[0] + .[1]' <(echo "$repos_json") <(echo "$resp"))
  page=$((page + 1))
done

total=$(echo "$repos_json" | jq 'length')
echo "Found ${total} repos on GitHub for ${GITHUB_USER}"

echo "$repos_json" | jq -c '.[] | {name, private}' | while read -r entry; do
  name=$(echo "$entry" | jq -r '.name')
  private=$(echo "$entry" | jq -r '.private')

  echo "Processing: ${name} (private=${private})"

  # Check if it already exists in Gitea
  existing_status=$(curl -s -o /dev/null -w "%{http_code}" \
    -H "Authorization: token ${GITEA_TOKEN}" \
    "${GITEA_URL}/api/v1/repos/${GITEA_OWNER}/${name}")

  if [ "$existing_status" == "200" ]; then
    echo "  Already mirrored, skipping migration (existing mirror syncs on its own schedule)."
    continue
  fi

  http_code=$(curl -s -o /tmp/gitea_migrate_resp.json -w "%{http_code}" \
    -X POST "${GITEA_URL}/api/v1/repos/migrate" \
    -H "Authorization: token ${GITEA_TOKEN}" \
    -H "Content-Type: application/json" \
    -d @- <<EOF
{
  "clone_addr": "https://github.com/${GITHUB_USER}/${name}.git",
  "repo_name": "${name}",
  "repo_owner": "${GITEA_OWNER}",
  "mirror": true,
  "mirror_interval": "${MIRROR_INTERVAL}",
  "private": ${private},
  "service": "github",
  "auth_token": "${GITHUB_TOKEN}"
}
EOF
  )

  if [ "$http_code" == "201" ]; then
    echo "  Created mirror (private=${private})."
  else
    echo "  Failed (HTTP ${http_code}):"
    cat /tmp/gitea_migrate_resp.json
  fi

  sleep 1  # be gentle on both APIs
done

echo "Done."