name: Generate Documentation

on:
  push:
    paths-ignore:
      - "cmake/**"
    branches: ['*']
    tags: ['*']
  pull_request:
    paths:
      - "docs/sphinx/**"
  workflow_dispatch:

jobs:
  docs:
    runs-on: ubuntu-latest
    outputs:
      commitHash: ${{ steps.setup.outputs.commitHash }}
      commitBranch: ${{ steps.setup.outputs.commitBranch }}
      fullCommitHash: ${{ steps.setup.outputs.fullCommitHash }}
    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Setup Environment
        id: setup
        run: |
          BRANCH=$(git describe --exact-match --tags 2> /dev/null || git branch --show-current)
          # Remove patch version from tag
          BRANCH=$(echo ${BRANCH} | sed -e 's/\.[0-9]*$//')
          echo "commitBranch=${BRANCH}" >> $GITHUB_OUTPUT
          echo "commitHash=$(git describe --exact-match --tags 2> /dev/null || git rev-parse --short HEAD)" >> $GITHUB_OUTPUT
          echo "fullCommitHash=$(git rev-parse HEAD)" >> $GITHUB_OUTPUT

      - name: Bump Version Number
        shell: bash
        if: github.event_name == 'push'
        run: |
          VERTEST="\#define\sLIBOBS_API_\w+_VER\s([0-9]{1,2})"
          VER=""
          MAJOR=""
          while IFS= read -r l
          do
              if [[ $l =~ $VERTEST ]]; then
                  if [[ $VER = '' ]]; then MAJOR="${BASH_REMATCH[1]}"; else VER+="."; fi
                  VER+="${BASH_REMATCH[1]}"
              fi
          done < "libobs/obs-config.h"

          SVER="version = '([0-9\.]+)'"
          RVER="version = '$VER'"
          SREL="release = '([0-9\.]+)'"
          RREL="release = '$VER'"
          SCOPY="copyright = '([A-Za-z0-9, ]+)'"
          RCOPY="copyright = '2017-$(date +"%Y"), Hugh Bailey'"
          sed -i -E -e "s/${SVER}/${RVER}/g" -e "s/${SREL}/${RREL}/g" -e "s/${SCOPY}/${RCOPY}/g" docs/sphinx/conf.py

      - uses: totaldebug/sphinx-publish-action@1.2.0
        with:
          sphinx_src: 'docs/sphinx'
          build_only: True
          target_branch: 'master'
          target_path: '../home/_build'
          pre_build_commands: 'pip install -Iv sphinx==5.1.1'

      - uses: actions/upload-artifact@v3
        with:
          name: 'OBS Studio Docs ${{ steps.setup.outputs.commitHash }}'
          path: |
            ${{ runner.temp }}/_github_home/_build
            !${{ runner.temp }}/_github_home/_build/.doctrees

  deploy:
    runs-on: ubuntu-latest
    needs: docs
    if: ${{ github.event_name == 'workflow_dispatch' || (github.repository_owner == 'obsproject' && startsWith(github.ref, 'refs/tags/') && github.event_name != 'pull_request') }}
    environment:
      name: cf-pages-deploy
    concurrency:
      group: "cf-pages-deployment"
      cancel-in-progress: true
    steps:
      - uses: actions/download-artifact@v3
        with:
          name: 'OBS Studio Docs ${{ needs.docs.outputs.commitHash }}'
          path: docs

      - name: Setup redirects
        run: |
          echo "/previous/27.2 https://obsproject.com/docs/27.2 302" >> docs/_redirects
          echo "/previous/:major.:minor https://:major-:minor.${{ vars.CF_PAGES_PROJECT }}.pages.dev 302" >> docs/_redirects

      - name: Publish to live page
        uses: cloudflare/wrangler-action@4c10c1822abba527d820b29e6333e7f5dac2cabd
        with:
          workingDirectory: docs
          apiToken: ${{ secrets.CF_API_TOKEN }}
          accountId: ${{ secrets.CF_ACCOUNT_ID }}
          command: pages publish . --project-name=${{ vars.CF_PAGES_PROJECT }} --commit-hash='${{ needs.docs.outputs.fullCommitHash }}'

      - name: Publish to tag alias
        if: ${{ startsWith(github.ref, 'refs/tags/') }}
        uses: cloudflare/wrangler-action@4c10c1822abba527d820b29e6333e7f5dac2cabd
        with:
          workingDirectory: docs
          apiToken: ${{ secrets.CF_API_TOKEN }}
          accountId: ${{ secrets.CF_ACCOUNT_ID }}
          command: pages publish . --project-name=${{ vars.CF_PAGES_PROJECT }} --commit-hash='${{ needs.docs.outputs.fullCommitHash }}' --branch='${{ needs.docs.outputs.commitBranch }}'