#!/usr/bin/env bash
# Batch-promote local coulomb repos from gitea-remote origin to forgejo-remote.
# Uses railiance-enablement/tools/promote-repo-to-forgejo.sh per repo.
set -euo pipefail

ROOT="${HOME}"
PROMOTE="${PROMOTE_SCRIPT:-$HOME/railiance-enablement/tools/promote-repo-to-forgejo.sh}"
PATCH="${PATCH_SCRIPT:-$HOME/the-custodian/tools/patch-forgejo-remote-urls.sh}"
API_BASE="${API_BASE:-http://127.0.0.1:8000}"
DRY_RUN="${DRY_RUN:-0}"
SKIP_CI="${SKIP_CI:-0}"

usage() {
  cat <<'USAGE'
Usage: migrate-gitea-repos-to-forgejo.sh [repo ...]

  With no args: migrate every ~/ checkout whose origin is gitea-remote.
  With slugs: migrate only those repos (must exist under ~/).

Environment:
  DRY_RUN=1     List targets only; do not push or patch
  SKIP_CI=1     Skip ci-smoke workflow commit in promote script (set PROMOTE_CI_TEMPLATE=/dev/null)
USAGE
}

is_gitea_origin() {
  local path="$1"
  local url
  url="$(git -C "$path" remote get-url origin 2>/dev/null || true)"
  [[ "$url" == gitea-remote:* ]] || [[ "$url" == *gitea.coulomb.social* ]]
}

collect_targets() {
  local slug path
  if [[ $# -gt 0 ]]; then
    for slug in "$@"; do
      path="${ROOT}/${slug}"
      if [[ ! -d "${path}/.git" ]]; then
        echo "SKIP ${slug} (no git checkout at ${path})" >&2
        continue
      fi
      if is_gitea_origin "$path"; then
        echo "$slug"
      else
        echo "SKIP ${slug} (origin not gitea-remote)" >&2
      fi
    done
    return
  fi
  for path in "${ROOT}"/*/; do
    [[ -d "${path}/.git" ]] || continue
    slug="$(basename "$path")"
    if is_gitea_origin "$path"; then
      echo "$slug"
    fi
  done
}

mapfile -t TARGETS < <(collect_targets "$@")
if [[ ${#TARGETS[@]} -eq 0 ]]; then
  echo "No gitea-remote repos to migrate."
  exit 0
fi

echo "=== Gitea → Forgejo migration (${#TARGETS[@]} repos) ==="
printf '  %s\n' "${TARGETS[@]}"

if [[ "$DRY_RUN" == "1" ]]; then
  echo "DRY_RUN=1 — no changes made."
  exit 0
fi

if [[ ! -x "$PROMOTE" ]]; then
  echo "ERROR: promote script not found: $PROMOTE" >&2
  exit 1
fi

FAILED=()
OK=()

for slug in "${TARGETS[@]}"; do
  echo ""
  echo ">>> ${slug}"
  if [[ "$SKIP_CI" == "1" ]]; then
    export PROMOTE_CI_TEMPLATE=/dev/null
  fi
  if "$PROMOTE" "$slug" "${ROOT}/${slug}"; then
    if [[ -x "$PATCH" ]]; then
      "$PATCH" "$slug" || true
    fi
    OK+=("$slug")
  else
    echo "FAIL ${slug}" >&2
    FAILED+=("$slug")
  fi
done

echo ""
echo "=== Summary ==="
echo "OK (${#OK[@]}): ${OK[*]:-none}"
if [[ ${#FAILED[@]} -gt 0 ]]; then
  echo "FAILED (${#FAILED[@]}): ${FAILED[*]}"
  exit 1
fi