#!/usr/bin/env bash
#
# Compare the scripts/repos.list clone list against the Gitea server
# (tea repo list --output json).
#
#   - MISSING: exists on the server but is neither in the clone list
#     nor in repos.ignore
#   - STALE:   listed as a Gitea repo but does not exist on the server
#
# Exit code: 0 if everything matches; 1 if either list has hits.

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
LIST="$SCRIPT_DIR/repos.list"
IGNORE="$SCRIPT_DIR/repos.ignore"
GITEA_HOST="git.teletypegames.org"

command -v tea >/dev/null 2>&1 || {
  echo "ERROR: tea CLI not found. Run: make tea" >&2
  exit 1
}

# Repos on the server: owner/name.
#
# Paginated on purpose. Gitea caps a page at MAX_RESPONSE_ITEMS (50 by default)
# whatever --limit says, so `tea repo list --limit 1000` silently returns the
# first 50 — which looked like a repo had vanished from the server the day the
# estate grew past fifty. Pages are requested until a short one comes back.
server=$(
  page=1
  while :; do
    batch=$(tea api "/user/repos?limit=50&page=$page" | jq -r '.[].full_name')
    [ -z "$batch" ] && break
    echo "$batch"
    [ "$(echo "$batch" | wc -l)" -lt 50 ] && break
    page=$((page + 1))
  done | sort -u
)

[ -n "$server" ] || { echo "ERROR: the server returned no repos — is the tea login still valid?" >&2; exit 1; }

# Gitea repos in the clone list: owner/name extracted from the clone URL
listed=$(sed -nE "s#^[^|#]+\|ssh://git@${GITEA_HOST}:[0-9]+/(.+)\$#\1#p" "$LIST" | sed 's/\.git$//' | sort)

# Intentionally excluded repos
ignored=$(sed -e 's/#.*//' -e '/^[[:space:]]*$/d' "$IGNORE" 2>/dev/null | sort || true)

missing=$(comm -23 <(echo "$server") <(sort -u <(echo "$listed") <(echo "$ignored")))
stale=$(comm -13 <(echo "$server") <(echo "$listed"))

status=0

if [ -n "$missing" ]; then
  echo "MISSING from the clone list (exists on the server):"
  echo "$missing" | sed 's/^/  - /'
  status=1
fi

if [ -n "$stale" ]; then
  echo "STALE in the clone list (not on the server):"
  echo "$stale" | sed 's/^/  - /'
  status=1
fi

if [ "$status" -eq 0 ]; then
  echo "OK: the clone list covers all $(echo "$server" | wc -l | tr -d ' ') repos on the server ($(echo "$ignored" | grep -c . || true) intentionally excluded)."
fi

exit "$status"