name: Auto PR

on:
  push:
    branches:
      - 'feat/**'

jobs:
  open-pr:
    runs-on: [macos, host]
    steps:
      - name: Create Pull Request via Gitea API
        env:
          CI_TOKEN: ${{ secrets.CI_TOKEN }}
          GITEA_BASE_URL: https://gitea.jaybe.dev
          REPO: ${{ github.repository }}
          HEAD_BRANCH: ${{ github.ref_name }}
          BASE_BRANCH: main
        run: |
          set -euo pipefail
          if [ -z "${CI_TOKEN:-}" ]; then
            echo "GITEA_TOKEN not set; skipping auto-pr"; exit 0; fi
          OWNER=$(echo "$REPO" | cut -d'/' -f1)
          NAME=$(echo "$REPO" | cut -d'/' -f2)
          TITLE="auto: PR for $HEAD_BRANCH"
          BODY="Automated PR created on push to $HEAD_BRANCH"
          echo "Creating PR $HEAD_BRANCH -> $BASE_BRANCH for $OWNER/$NAME"
          HTTP_CODE=$(curl -sS -o /tmp/pr_resp.json -w "%{http_code}" -X POST \
            -H "Content-Type: application/json" \
            -H "Authorization: token ${CI_TOKEN}" \
            "${GITEA_BASE_URL}/api/v1/repos/${OWNER}/${NAME}/pulls" \
            -d "{\"head\":\"${HEAD_BRANCH}\",\"base\":\"${BASE_BRANCH}\",\"title\":\"${TITLE}\",\"body\":\"${BODY}\"}") || true
          echo "API status: $HTTP_CODE"
          if [ "$HTTP_CODE" = "201" ]; then
            echo "PR created"; cat /tmp/pr_resp.json
            PR_NUMBER=$(cat /tmp/pr_resp.json | sed -n 's/.*"number":\([0-9]*\).*/\1/p' | head -n1)
          else
            echo "PR not created (possibly exists). Response:"; cat /tmp/pr_resp.json || true
          fi

          # Retry to resolve PR number by listing open PRs and matching head/base
          i=0
          while [ -z "${PR_NUMBER:-}" ] && [ $i -lt 10 ]; do
            i=$((i+1))
            echo "[retry $i] Resolving PR number for $HEAD_BRANCH -> $BASE_BRANCH"
            curl -sS -o /tmp/pr_list.json -H "Authorization: token ${CI_TOKEN}" \
              "${GITEA_BASE_URL}/api/v1/repos/${OWNER}/${NAME}/pulls?state=open" || true
            # Extract PR number matching head.ref==HEAD_BRANCH and base.ref==BASE_BRANCH
            PR_NUMBER=$(awk -v hb="$HEAD_BRANCH" -v bb="$BASE_BRANCH" 'BEGIN{RS="},"; pr=""} {
              if($0 ~ /\"head\":\{[^}]*\"ref\":\"" hb "\"/ && $0 ~ /\"base\":\{[^}]*\"ref\":\"" bb "\"/){
                if (match($0, /\"number\":([0-9]+)/, m)) { print m[1]; exit }
              }
            }' /tmp/pr_list.json)
            if [ -z "${PR_NUMBER:-}" ]; then sleep 2; fi
          done

          if [ -n "${PR_NUMBER:-}" ]; then
            echo "Resolving label id for 'automerge' in $OWNER/$NAME"
            curl -sS -o /tmp/labels.json -H "Authorization: token ${CI_TOKEN}" \
              "${GITEA_BASE_URL}/api/v1/repos/${OWNER}/${NAME}/labels"
            LID=$(awk 'BEGIN{RS=","} /"name":"automerge"/ {if (match($0,/"id":([0-9]+)/,m)) {print m[1]; exit}}' /tmp/labels.json || true)
            if [ -z "${LID:-}" ]; then
              echo "Label 'automerge' not found. Creating..."
              curl -sS -o /tmp/create_label.json -X POST \
                -H "Content-Type: application/json" \
                -H "Authorization: token ${CI_TOKEN}" \
                "${GITEA_BASE_URL}/api/v1/repos/${OWNER}/${NAME}/labels" \
                -d '{"name":"automerge","color":"#0ea5e9"}'
              LID=$(sed -n 's/.*"id":\([0-9]*\).*/\1/p' /tmp/create_label.json | head -n1 || true)
            fi
            if [ -n "${LID:-}" ]; then
              echo "Adding 'automerge' (id=$LID) label to PR #$PR_NUMBER"
              curl -sS -X POST \
                -H "Content-Type: application/json" \
                -H "Authorization: token ${CI_TOKEN}" \
                "${GITEA_BASE_URL}/api/v1/repos/${OWNER}/${NAME}/issues/${PR_NUMBER}/labels" \
                -d '{"labels":['"${LID}"']}' || true
            else
              echo "Failed to resolve label id; skipping label add"
            fi
          else
            echo "PR number could not be determined; skipping label add"
          fi