name: Build PR & Deploy

on:
  workflow_run:
    workflows: ["Trigger PR Build"]
    types:
      - completed

concurrency:
  group: pull-request-builds
  cancel-in-progress: false

permissions:
  contents: write
  pull-requests: write
  actions: read

jobs:
  build:
    runs-on: ubuntu-latest
    if: github.event.repository.fork == false
    outputs:
      url: ${{ steps.cloudflare.outputs.deployment-url }}
      branch_url: ${{ steps.cloudflare.outputs.pages-deployment-alias-url }}
      pr_number: ${{ steps.pr_info.outputs.pr_number }}
      pr_sha: ${{ steps.pr_info.outputs.pr_sha }}
    steps:
      - name: 'Download artifact'
        uses: actions/download-artifact@v4
        with:
          run-id: ${{ github.event.workflow_run.id }}
          github-token: ${{ github.token }}
          name: pr_info
          path: ${{ github.workspace }}/pr_info

      - name: Display structure of downloaded files
        run: tree ${{ github.workspace }}

      - name: Read PR info
        id: pr_info
        run: |
          echo "pr_number=$(cat ${{ github.workspace }}/pr_info/PR_NUMBER)" >> $GITHUB_OUTPUT
          echo "pr_sha=$(cat ${{ github.workspace }}/pr_info/PR_SHA)" >> $GITHUB_OUTPUT

      - name: Checkout repo
        uses: actions/checkout@v4
        with:
          ref: ${{ steps.pr_info.outputs.pr_sha }}
          fetch-depth: 0
          sparse-checkout: |
            docs
            images
            includes
            overrides

      - name: Setup python
        uses: actions/setup-python@v5.3.0
        with:
          python-version: 3.x

      - name: Get pip cache directory
        id: pip-cache
        run: |
          echo "dir=$(pip cache dir)" >> $GITHUB_OUTPUT

      - name: Cache dependencies
        uses: actions/cache@v4.2.0
        with:
          path: ${{ steps.pip-cache.outputs.dir }}
          key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
          restore-keys: |
            ${{ runner.os }}-pip-

      - name: Install dependencies
        run: pip install -r docs/requirements.txt

      - name: Build mkdocs
        run: |
          mkdocs build --clean
          mkdocs --version

      - name: Publish to Cloudflare Pages
        id: cloudflare
        uses: cloudflare/wrangler-action@v3
        with:
          apiToken: ${{ secrets.CF_API_TOKEN }}
          accountId: ${{ secrets.CF_ACCOUNT_ID }}
          command: >
            pages deploy site
            --project-name=trash-guides
            --branch=pr-${{ steps.pr_info.outputs.pr_number }}
            --commit-hash=${{ steps.pr_info.outputs.pr_sha }}

  comment:
    needs: build
    runs-on: ubuntu-latest
    if: always() && github.event.repository.fork == false
    steps:
      - name: Checkout repo
        uses: actions/checkout@v4

      - name: Get PR last commit SHA
        run: |
          PR_DATA=$(curl -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
                  -H "Accept: application/vnd.github.v3+json" \
                  "https://api.github.com/repos/${{ github.repository }}/pulls/${{ needs.build.outputs.pr_number }}")
          LAST_COMMIT_SHA=$(echo "$PR_DATA" | jq -r .head.sha)
          echo "LAST_COMMIT_SHA=$LAST_COMMIT_SHA" >> $GITHUB_ENV
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Comment PR
        run: |
          PREVIEW_URL=${{ needs.build.outputs.url }}
          BRANCH_PREVIEW_URL=${{ needs.build.outputs.branch_url }}
          BUILD_STATUS=${{ needs.build.result }}

          if [ "$BUILD_STATUS" == "success" ]; then
            STATUS_EMOJI="✅"
            STATUS_MESSAGE="Deploy successful!"
          else
            STATUS_EMOJI="❌"
            STATUS_MESSAGE="Build failed!"
          fi

          COMMENT_BODY="Deploying with ⚡ Cloudflare Pages<br><table><tr><td><strong>Latest commit:</strong></td><td><code>$LAST_COMMIT_SHA</code></td></tr><tr><td><strong>Status:</strong></td><td>&nbsp;$STATUS_EMOJI&nbsp; $STATUS_MESSAGE</td></tr><tr><td><strong>Preview URL:</strong></td><td><a href='$PREVIEW_URL'>$PREVIEW_URL</a></td></tr><tr><td><strong>Branch Preview URL:</strong></td><td><a href='$BRANCH_PREVIEW_URL'>$BRANCH_PREVIEW_URL</a></td></tr></table>"

          ESCAPED_BODY=$(echo "$COMMENT_BODY" | jq -aRs .)
          COMMENTS_URL="https://api.github.com/repos/${{ github.repository }}/issues/${{ needs.build.outputs.pr_number }}/comments"

          curl -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
              -H "Accept: application/vnd.github+json" \
              -X POST \
              -d "{\"body\": $ESCAPED_BODY }" \
              $COMMENTS_URL