name: Detect PR Pipeline Type

on:
  pull_request:
    branches: [main, dev, uat]
  workflow_call:

permissions:
  contents: read
  pull-requests: write

jobs:
  test-detection-logic:
    runs-on: ubuntu-latest
    timeout-minutes: 2

    env:
      HEAD_REF: ${{ github.head_ref }}
      BASE_REF: ${{ github.base_ref }}

    steps:
      - name: Checkout
        run: |
          git clone --depth=1 "https://x-access-token:${{ secrets.GITEA_TOKEN }}@git.farh.net/${{ github.repository }}.git" .
          git fetch origin "$BASE_REF" --depth=1
          git fetch origin +refs/pull/*/head:refs/pull/*/head --depth=1
          git checkout "${{ github.sha }}"

      - name: Run detection tests
        run: bash scripts/test-detect-pipeline.sh

  detect-pipeline:
    runs-on: ubuntu-latest
    timeout-minutes: 5

    env:
      HEAD_REF: ${{ github.head_ref }}
      BASE_REF: ${{ github.base_ref }}

    outputs:
      pipeline-type: ${{ steps.detect.outputs.pipeline-type }}

    steps:
      - name: Checkout
        run: |
          git clone --depth=1 "https://x-access-token:${{ secrets.GITEA_TOKEN }}@git.farh.net/${{ github.repository }}.git" .
          git fetch origin "$BASE_REF" --depth=1
          git fetch origin +refs/pull/*/head:refs/pull/*/head --depth=1
          git checkout "${{ github.sha }}"

      - name: Get changed files
        run: |
          mkdir -p /tmp/pr-detect
          git fetch origin "$BASE_REF" --depth=1 2>/dev/null
          git fetch origin +refs/pull/*/head:refs/pull/*/head --depth=1 2>/dev/null
          git diff --name-only "origin/$BASE_REF" HEAD > /tmp/pr-detect/changed_files.txt
          echo "Files found: $(wc -l < /tmp/pr-detect/changed_files.txt)"
          cat /tmp/pr-detect/changed_files.txt

      - name: Detect pipeline type
        id: detect
        run: |
          pipeline=$(bash scripts/detect-pipeline.sh < /tmp/pr-detect/changed_files.txt)

          echo "pipeline-type=$pipeline" >> $GITHUB_OUTPUT
          echo "Detected pipeline: $pipeline"

      - name: Set PR label
        if: github.event_name == 'pull_request'
        continue-on-error: true
        env:
          GH_TOKEN: ${{ github.token }}
          REPO: ${{ github.repository }}
          PR_NUMBER: ${{ github.event.pull_request.number }}
          PIPELINE_TYPE: ${{ steps.detect.outputs.pipeline-type }}
        run: |
          curl -sf \
            -X POST \
            -H "Authorization: Bearer ${GH_TOKEN}" \
            -H "Accept: application/vnd.github.v3+json" \
            "https://api.github.com/repos/${REPO}/issues/${PR_NUMBER}/labels" \
            -d "{\"labels\":[\"${PIPELINE_TYPE}\"]}"