name: Build Pull Request

on:
  pull_request:
    types:
      - opened
      - reopened
      - synchronize

env:
  ARCHIVE_NAME: vision-start-pr-${{ gitea.event.pull_request.number }}.zip

jobs:
  build:
    name: Build Pull Request Archive
    runs-on: ubuntu-amd64
    steps:
      - name: Check out repository code
        uses: actions/checkout@v4

      - name: Set up Node.js
        uses: actions/setup-node@v4
        with:
          node-version: 22
          cache: 'npm'

      - name: Set up required tools
        run: sudo apt-get install zip wget -y

      - name: Install JS dependencies
        run: npm ci

      - name: Run build
        run: |
          bash scripts/prepare_release.sh
          npm run build

      - name: Prepare archive
        run: |
          mkdir vision-start
          mv dist vision-start/
          mv extension vision-start/
          mv manifest.json vision-start/

      - name: Create zip archive
        run: |
          cd vision-start
          zip -r ../${{ env.ARCHIVE_NAME }} *

      - name: Upload build artifact
        uses: actions/upload-artifact@v3
        with:
          name: pr-release-zip
          path: ${{ env.ARCHIVE_NAME }}

  capture_screenshots:
    name: Capture Pull Request Screenshots
    runs-on: ubuntu-amd64
    needs: build
    steps:
      - name: Check out repository code
        uses: actions/checkout@v4

      - name: Set up Node.js
        uses: actions/setup-node@v4
        with:
          node-version: 22
          cache: 'npm'

      - name: Set up required tools
        run: sudo apt-get install unzip -y

      - name: Install JS dependencies
        run: npm ci

      - name: Download build artifact
        uses: actions/download-artifact@v3
        with:
          name: pr-release-zip

      - name: Unpack build artifact
        run: |
          unzip -o -q ${{ env.ARCHIVE_NAME }}
          if [ ! -d dist ]; then
            echo "The build artifact does not contain dist/."
            unzip -l ${{ env.ARCHIVE_NAME }}
            exit 1
          fi

      - name: Install Playwright Chromium
        run: npx playwright install --with-deps chromium

      - name: Capture screenshots
        run: npm run capture:screenshots

      - name: Upload screenshot artifact
        uses: actions/upload-artifact@v3
        with:
          name: pr-screenshots
          retention-days: 30
          path: |
            screenshots/home.png
            screenshots/editing.png
            screenshots/configuration.png

  publish_screenshot_preview:
    name: Publish Pull Request Screenshot Preview
    runs-on: ubuntu-amd64
    needs: capture_screenshots
    if: ${{ gitea.event.pull_request.head.repo.full_name == gitea.repository }}
    permissions:
      actions: read
      issues: write
    steps:
      - name: Set up required tools
        run: sudo apt-get install curl jq -y

      - name: Download screenshot artifact
        uses: actions/download-artifact@v3
        with:
          name: pr-screenshots
          path: screenshots

      - name: Update pull request screenshot preview
        continue-on-error: true
        env:
          GITEA_API_URL: ${{ gitea.server_url }}/api/v1
          GITEA_TOKEN: ${{ gitea.token }}
          REPOSITORY: ${{ gitea.repository }}
          PR_NUMBER: ${{ gitea.event.pull_request.number }}
        run: |
          set -euo pipefail
          OWNER="${REPOSITORY%%/*}"
          REPO="${REPOSITORY#*/}"
          MARKER='<!-- vision-start-pr-screenshots -->'
          COMMENTS_URL="$GITEA_API_URL/repos/$OWNER/$REPO/issues/$PR_NUMBER/comments"
          COMMENTS=$(curl -fsS -H "Authorization: token $GITEA_TOKEN" "$COMMENTS_URL")
          COMMENT_ID=$(printf '%s' "$COMMENTS" | jq -r --arg marker "$MARKER" '.[] | select(.body | contains($marker)) | .id' | tail -n 1)

          if [ -z "$COMMENT_ID" ] || [ "$COMMENT_ID" = "null" ]; then
            PAYLOAD=$(jq -n --arg body "$MARKER" '{body: $body}')
            COMMENT_ID=$(curl -fsS -X POST \
              -H "Authorization: token $GITEA_TOKEN" \
              -H 'Content-Type: application/json' \
              --data "$PAYLOAD" \
              "$COMMENTS_URL" | jq -r '.id')
          fi

          ASSETS_URL="$GITEA_API_URL/repos/$OWNER/$REPO/issues/comments/$COMMENT_ID/assets"
          for ASSET_ID in $(curl -fsS -H "Authorization: token $GITEA_TOKEN" "$ASSETS_URL" | jq -r '.[].id'); do
            curl -fsS -X DELETE -H "Authorization: token $GITEA_TOKEN" "$ASSETS_URL/$ASSET_ID"
          done

          upload_asset() {
            curl -fsS -X POST \
              -H "Authorization: token $GITEA_TOKEN" \
              -F "attachment=@$1;type=image/png" \
              "$ASSETS_URL" | jq -r '.browser_download_url'
          }

          HOME_URL=$(upload_asset screenshots/home.png)
          EDITING_URL=$(upload_asset screenshots/editing.png)
          CONFIGURATION_URL=$(upload_asset screenshots/configuration.png)
          BODY=$(printf '%s\n\n%s\n\n%s\n%s\n\n%s\n%s\n\n%s\n%s' \
            "$MARKER" \
            '## Visual preview' \
            '### Home' \
            "![Home]($HOME_URL)" \
            '### Editing' \
            "![Editing]($EDITING_URL)" \
            '### Configuration' \
            "![Configuration]($CONFIGURATION_URL)")
          PAYLOAD=$(jq -n --arg body "$BODY" '{body: $body}')
          curl -fsS -X PATCH \
            -H "Authorization: token $GITEA_TOKEN" \
            -H 'Content-Type: application/json' \
            --data "$PAYLOAD" \
            "$GITEA_API_URL/repos/$OWNER/$REPO/issues/comments/$COMMENT_ID"