name: Build

on:
  workflow_call:
    outputs:
      build-success:
        description: "Whether build was successful"
        value: ${{ jobs.build.outputs.success }}
      build_ran:
        description: "True when npm ci and at least one build step ran (path filters matched)"
        value: ${{ jobs.build.outputs.build_ran }}

jobs:
  build:
    runs-on: ubuntu-latest
    permissions:
      contents: write
    outputs:
      success: ${{ steps.build.outputs.success }}
      build_ran: ${{ steps.run.outputs.build_ran }}
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Detect changed paths
        uses: dorny/paths-filter@v3
        id: changes
        with:
          filters: |
            scripts:
              - '_scripts/**/*.js'
              - 'assets/**/*.js'
            tailwind:
              - '**/*.liquid'
              - '**/*.css'
              - '_scripts/**/*.js'
              - 'tailwind.config.*'
              - 'postcss.config.*'

      - name: Detect build entrypoints
        id: detect
        run: |
          HAS_SCRIPTS=false
          if ls _scripts/*.js >/dev/null 2>&1; then
            HAS_SCRIPTS=true
          fi
          HAS_STYLES=false
          if [ -f "_styles/main.css" ]; then
            HAS_STYLES=true
          fi
          echo "has_scripts=$HAS_SCRIPTS" >> $GITHUB_OUTPUT
          echo "has_styles=$HAS_STYLES" >> $GITHUB_OUTPUT

      - name: Decide which build steps to run
        id: run
        run: |
          SCRIPTS="${{ steps.changes.outputs.scripts }}"
          TW="${{ steps.changes.outputs.tailwind }}"
          HAS_SCR="${{ steps.detect.outputs.has_scripts }}"
          HAS_STY="${{ steps.detect.outputs.has_styles }}"
          run_scripts=false
          run_tailwind=false
          if [ "$SCRIPTS" = "true" ] && [ "$HAS_SCR" = "true" ]; then run_scripts=true; fi
          if [ "$TW" = "true" ] && [ "$HAS_STY" = "true" ]; then run_tailwind=true; fi
          if [ "$run_scripts" = "true" ] || [ "$run_tailwind" = "true" ]; then
            echo "build_ran=true" >> $GITHUB_OUTPUT
          else
            echo "build_ran=false" >> $GITHUB_OUTPUT
          fi
          echo "run_scripts=$run_scripts" >> $GITHUB_OUTPUT
          echo "run_tailwind=$run_tailwind" >> $GITHUB_OUTPUT

      - name: Set up Node.js
        if: steps.run.outputs.build_ran == 'true'
        uses: actions/setup-node@v4
        with:
          node-version: "24"

      - name: Install dependencies from lockfile
        if: steps.run.outputs.build_ran == 'true'
        run: |
          if [ ! -f "package-lock.json" ]; then
            echo "package-lock.json is required for deterministic build workflow installs."
            exit 1
          fi
          npm ci

      - name: Build scripts
        if: steps.run.outputs.build_ran == 'true' && steps.run.outputs.run_scripts == 'true'
        run: |
          npx --no-install climaybe build-scripts

      - name: Run Tailwind build
        if: steps.run.outputs.build_ran == 'true' && steps.run.outputs.run_tailwind == 'true'
        run: |
          NODE_ENV=production npx --no-install climaybe build

      - name: Commit and push changes
        if: steps.run.outputs.build_ran == 'true'
        run: |
          git config --local user.email "action@github.com"
          git config --local user.name "GitHub Action"
          BRANCH_NAME=${{ github.head_ref || github.ref_name }}
          git fetch origin "$BRANCH_NAME" || echo "Branch does not exist yet"
          git checkout -B "$BRANCH_NAME" "origin/$BRANCH_NAME" 2>/dev/null || git checkout -B "$BRANCH_NAME"
          if ls assets/*.js >/dev/null 2>&1; then
            git add -f assets/*.js
          fi
          if [ -f "assets/style.css" ]; then
            git add -f assets/style.css
          fi
          if git diff --staged --quiet; then
            echo "No changes to commit"
          else
            git commit -m "chore(assets): update compiled javascript and css"
            git push origin "$BRANCH_NAME"
          fi

      - name: Finalize success
        id: build
        if: success()
        run: echo "success=true" >> $GITHUB_OUTPUT