#!/usr/bin/env bash
# pr-resolve — list and resolve PR review threads in batch.
#
# Usage:
#   scripts/pr-resolve list <PR>
#       List unresolved review threads, one per line, TAB-separated:
#         <thread_id>\t<comment_id>\t<author>\t<path>\t<body_first_120_chars>
#
#   scripts/pr-resolve reply <PR> <CID> <TID> <BODY>
#       Reply to the thread starter, resolve the thread, and add a +1
#       reaction in one call. Use this for both "fixed" replies and
#       pushback replies — the reply body conveys whether you agreed
#       or not.
#
# Owner/repo are derived from `gh repo view` in the current repo.
#
# Requires: gh (authenticated) and jq.

set -euo pipefail

usage() {
  sed -n '2,16p' "$0" | sed 's|^# \{0,1\}||'
  exit "${1:-1}"
}

[ $# -ge 1 ] || usage

cmd=$1; shift

read -r OWNER REPO < <(gh repo view --json owner,name --jq '"\(.owner.login) \(.name)"')

case "$cmd" in
  list)
    [ $# -eq 1 ] || usage
    PR=$1
    gh api graphql -f query='
      query($owner: String!, $repo: String!, $pr: Int!) {
        repository(owner: $owner, name: $repo) {
          pullRequest(number: $pr) {
            reviewThreads(first: 100) {
              nodes {
                id
                isResolved
                path
                comments(first: 1) {
                  nodes { databaseId author { login } body }
                }
              }
            }
          }
        }
      }' -f owner="$OWNER" -f repo="$REPO" -F pr="$PR" \
    | jq -r '.data.repository.pullRequest.reviewThreads.nodes
             | map(select(.isResolved == false))
             | .[]
             | "\(.id)\t\(.comments.nodes[0].databaseId)\t\(.comments.nodes[0].author.login)\t\(.path)\t\(.comments.nodes[0].body | gsub("\n"; " ") | .[0:120])"'
    ;;

  reply)
    [ $# -eq 4 ] || usage
    PR=$1; CID=$2; TID=$3; BODY=$4
    gh api -X POST "repos/$OWNER/$REPO/pulls/$PR/comments/$CID/replies" \
      -f body="$BODY" --silent
    gh api graphql -f query='mutation($t: ID!) { resolveReviewThread(input: {threadId: $t}) { thread { isResolved } } }' \
      -f t="$TID" --silent
    gh api -X POST "repos/$OWNER/$REPO/pulls/comments/$CID/reactions" \
      -f content="+1" --silent
    echo "ok $TID"
    ;;

  *)
    usage
    ;;
esac