name: 'git-pr'
description: 'Open a pull request in a Gitea repository via the Gitea API'

inputs:
  title:
    description: 'Title of the pull request'
    required: true
  head:
    description: 'Source branch for the PR (head)'
    required: true
  base:
    description: 'Target branch for the PR (base)'
    required: true
  body:
    description: 'Body / description of the pull request'
    required: false
    default: ''
  auto-merge:
    description: 'Whether to enable auto-merge on the PR (true/false)'
    required: false
    default: 'false'
  repo-owner:
    description: 'Owner (org or user) of the Gitea repository'
    required: true
  repo-name:
    description: 'Name of the Gitea repository'
    required: true
  gitea-url:
    description: 'Base URL of the Gitea instance'
    required: false
    default: 'https://gitea.kyndemo.live'
  token:
    description: 'Gitea API token with write access to the repository'
    required: true

outputs:
  pr-url:
    description: 'HTML URL of the opened pull request'
    value: NaN
  pr-number:
    description: 'Number of the opened pull request'
    value: NaN

runs:
  using: composite
  steps:
    - id: open-pr
      name: Open PR  → 
      shell: bash
      env:
        GITEA_TOKEN: 
        GITEA_URL: NaN
        REPO_OWNER: NaN
        REPO_NAME: NaN
        PR_TITLE: 
        PR_HEAD: 
        PR_BASE: 
        PR_BODY: 
      run: |
        echo "Opening PR '${PR_TITLE}': ${PR_HEAD} → ${PR_BASE} in ${REPO_OWNER}/${REPO_NAME}..."

        PAYLOAD=$(jq -n \
          --arg title "$PR_TITLE" \
          --arg head  "$PR_HEAD" \
          --arg base  "$PR_BASE" \
          --arg body  "$PR_BODY" \
          '{title: $title, head: $head, base: $base, body: $body}')

        RESPONSE=$(curl -s -w "\n%{http_code}" \
          -X POST "${GITEA_URL}/api/v1/repos/${REPO_OWNER}/${REPO_NAME}/pulls" \
          -H "Authorization: token ${GITEA_TOKEN}" \
          -H "Content-Type: application/json" \
          -d "$PAYLOAD")

        HTTP_BODY=$(echo "$RESPONSE" | head -n-1)
        HTTP_CODE=$(echo "$RESPONSE" | tail -n1)

        if [ "$HTTP_CODE" = "201" ]; then
          PR_URL=$(echo "$HTTP_BODY" | jq -r '.html_url')
          PR_NUMBER=$(echo "$HTTP_BODY" | jq -r '.number')
          echo "✓ PR #${PR_NUMBER} opened: ${PR_URL}"
          echo "pr-url=${PR_URL}" >> "$GITEA_OUTPUT"
          echo "pr-number=${PR_NUMBER}" >> "$GITEA_OUTPUT"
        elif [ "$HTTP_CODE" = "409" ]; then
          echo "⚠ A PR for ${PR_HEAD} → ${PR_BASE} already exists — skipping."
        else
          echo "✗ Failed to open PR. HTTP ${HTTP_CODE}: ${HTTP_BODY}" >&2
          exit 1
        fi