#!/usr/bin/env bash
# Shared by the run-*.sh scripts. Everything the scripts post goes through the
# reviewer token, so it appears as the bot account. The agent only ever sees the
# author token as GITEA_TOKEN, which is what pushes and opens pull requests.

ISSUE_URL="${GITEA_API_URL}/repos/${GITEA_REPOSITORY}/issues/${ISSUE_INDEX}"
PULL_URL="${GITEA_API_URL}/repos/${GITEA_REPOSITORY}/pulls/${ISSUE_INDEX}"
COMMENT_FILE="$(mktemp)"

gitea_api() {
  curl --fail-with-body --silent --show-error \
    -H "Authorization: token ${1}" \
    -H "Content-Type: application/json" \
    "${@:2}"
}

# Commits are made by the author account so the pull request and its commits
# belong to the same person.
configure_git_author() {
  AUTHOR="$(gitea_api "${GITEA_TOKEN}" "${GITEA_API_URL}/user")"
  git config --global user.name "$(jq -r '.login' <<< "${AUTHOR}")"
  git config --global user.email \
    "$(jq -r '.email // empty' <<< "${AUTHOR}")"
}

post_comment() {
  gitea_api "${REVIEWER_TOKEN}" -X POST \
    --data "$(jq -n --rawfile body "${COMMENT_FILE}" '{body: $body}')" \
    "${ISSUE_URL}/comments"
}

# A pull request event is a review request, so the response becomes a review
# rather than a comment: it requests changes when the agent asked @bot to fix
# something, only comments when the run failed, and approves otherwise.
post_result() {
  if [ "${EVENT_NAME}" != pull_request ]; then
    post_comment
    return
  fi
  local event=APPROVED
  if grep -q '@bot' "${COMMENT_FILE}"; then
    event=REQUEST_CHANGES
  elif grep -q '^Bot failed:' "${COMMENT_FILE}"; then
    event=COMMENT
  fi
  gitea_api "${REVIEWER_TOKEN}" -X POST \
    --data "$(jq -n --rawfile body "${COMMENT_FILE}" --arg event "${event}" \
      '{body: $body, event: $event}')" \
    "${PULL_URL}/reviews"
}

render_prompt() {
  export ISSUE_COMMENTS="$(
    gitea_api "${REVIEWER_TOKEN}" "${ISSUE_URL}/comments?limit=100" \
      | jq -r '.[] | "## " + .user.login + " at " + .created_at + "\n\n" + .body + "\n"'
  )"
  envsubst < "${ACTION_PATH}/scripts/prompt.md"
}