name: docs-and-testcov

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

on:
  push:
    branches: [main]
#   pull_request:
#     branches: [main]
  workflow_dispatch:

permissions:
  contents: read
  id-token: write
  pages: write

jobs:
  pick-runner:
    runs-on: ubuntu-latest
    outputs:
      runner: ${{ steps.choose.outputs.use-runner }}
    steps:
      - uses: actions/checkout@v4

      - id: choose
        uses: ./.github/actions/runner-fallback
        with:
          primary-runner: "self-hosted,ubuntu-latest"
          fallback-runner: "ubuntu-latest"
          github-token: ${{ secrets.GITHUB_TOKEN }}

  docs-and-testcov:
    needs: pick-runner
    runs-on: ${{ fromJson(needs.pick-runner.outputs.runner) }}

    steps:
      - uses: actions/checkout@v4

      - name: Set up Rust
        uses: actions-rs/toolchain@v1
        with:
          toolchain: stable
          override: true

      - name: Build documentation
        run: cargo doc --no-deps --release

      - name: Prepare documentation for Pages
        run: |

      - name: Install Cargo binstall
        uses: cargo-bins/cargo-binstall@main

      - name: Install cargo-tarpaulin via binstall
        run: cargo binstall cargo-tarpaulin --no-confirm --locked

      - name: Generate coverage report
        run: |
          mkdir -p testcov
          cargo tarpaulin --engine llvm --out Html --out Json

      - name: Check for tarpaulin-report.html
        run: |
          if [ ! -f tarpaulin-report.html ]; then
            echo "tarpaulin-report.html not found!"
            exit 1
          fi

      - name: Export tarpaulin coverage badge JSON
        # extract raw coverage and round to 2 decimal places
        run: |
          coverage=$(jq '.coverage' tarpaulin-report.json)
          formatted=$(printf "%.2f" "$coverage")
          jq --arg message "$formatted" \
            '{schemaVersion:1,
              label:"tarpaulin-report",
              message:$message,
              color:"blue"}' \
            tarpaulin-report.json \
          > tarpaulin-badge.json

      - name: Save last commit date JSON
        run: |
          last_commit_date=$(git log -1 --format=%cd --date=short)
          jq --arg date "$last_commit_date" \
            '{schemaVersion:1,
              label:"last-commit-date",
              message:$date,
              color:"blue"}' \
            <(echo '{}') \
          > last-commit-date.json

      - name: Copy files to output directory
        run: |
          mkdir output
          cp tarpaulin-report.html target/doc/rustframe/
          cp tarpaulin-report.json target/doc/rustframe/
          cp tarpaulin-badge.json target/doc/rustframe/
          cp last-commit-date.json target/doc/rustframe/
          mkdir -p target/doc/rustframe/.github
          cp .github/rustframe_logo.png target/doc/rustframe/.github/
          echo "<meta http-equiv=\"refresh\" content=\"0; url=rustframe\">" > target/doc/index.html

      - name: Upload Pages artifact
        if: github.event_name == 'push'
        uses: actions/upload-pages-artifact@v3
        with:
          path: target/doc/

      - name: Deploy to GitHub Pages
        if: github.event_name == 'push'
        uses: actions/deploy-pages@v4