name: Go Verification

on:
  push:
    branches: [main]
    paths-ignore:
      - '**.md'
      - 'docs/**'
      - 'LICENSE'
      - '.gitignore'
      - 'skill/**'
      - 'plugin/**'
  pull_request:
    branches: [main]
    paths-ignore:
      - '**.md'
      - 'docs/**'
      - 'LICENSE'
      - '.gitignore'
      - 'skill/**'
      - 'plugin/**'

env:
  FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true

permissions:
  contents: read

jobs:
  # Check which files changed to conditionally run jobs
  changes:
    name: Detect Changes
    runs-on: ubuntu-latest
    if: github.event.pull_request.draft == false
    outputs:
      go: ${{ steps.filter.outputs.go }}
    steps:
      - uses: actions/checkout@v5
      - uses: dorny/paths-filter@v3
        id: filter
        with:
          filters: |
            go:
              - '**.go'
              - 'go.mod'
              - 'go.sum'
              - 'cmd/**'
              - 'internal/**'

  build:
    name: Build & Vet
    needs: changes
    runs-on: ubuntu-latest
    steps:
      - name: Check for Go changes
        id: check
        run: |
          if [ "${{ needs.changes.outputs.go }}" = "true" ]; then
            echo "Go files detected"
            echo "has_go_changes=true" >> $GITHUB_OUTPUT
          else
            echo "⏭️ No Go files changed - docs/workflow-only changes detected"
            echo "has_go_changes=false" >> $GITHUB_OUTPUT
          fi

      - uses: actions/checkout@v5

      - uses: actions/setup-go@v6
        if: steps.check.outputs.has_go_changes == 'true'
        with:
          go-version: '1.26'

      - name: Download deps
        if: steps.check.outputs.has_go_changes == 'true'
        run: go mod download

      - name: Format check
        if: steps.check.outputs.has_go_changes == 'true'
        run: |
          unformatted=$(gofmt -l .)
          if [ -n "$unformatted" ]; then
            echo "Files not formatted:"
            echo "$unformatted"
            exit 1
          fi

      - name: Vet
        if: steps.check.outputs.has_go_changes == 'true'
        run: go vet ./...

      - name: Build
        if: steps.check.outputs.has_go_changes == 'true'
        run: go build -o pinchtab ./cmd/pinchtab

      - name: Test with coverage
        if: steps.check.outputs.has_go_changes == 'true'
        run: go test ./... -v -count=1 -coverprofile=coverage.out -covermode=atomic

      - name: Coverage summary
        if: steps.check.outputs.has_go_changes == 'true'
        run: |
          coverage=$(go tool cover -func=coverage.out | tail -1)
          echo "### Coverage" >> $GITHUB_STEP_SUMMARY
          echo "\`\`\`" >> $GITHUB_STEP_SUMMARY
          echo "$coverage" >> $GITHUB_STEP_SUMMARY
          echo "\`\`\`" >> $GITHUB_STEP_SUMMARY

  lint:
    name: Lint
    needs: changes
    runs-on: ubuntu-latest
    steps:
      - name: Check for Go changes
        id: check
        run: |
          if [ "${{ needs.changes.outputs.go }}" = "true" ]; then
            echo "has_go_changes=true" >> $GITHUB_OUTPUT
          else
            echo "⏭️ No Go files changed, skipping lint"
            echo "has_go_changes=false" >> $GITHUB_OUTPUT
          fi

      - uses: actions/checkout@v5

      - uses: actions/setup-go@v6
        if: steps.check.outputs.has_go_changes == 'true'
        with:
          go-version: '1.26'

      - uses: oven-sh/setup-bun@v2
        if: needs.changes.outputs.go == 'true'
        with:
          bun-version: latest

      - name: Install tygo
        if: needs.changes.outputs.go == 'true'
        run: go install github.com/gzuidhof/tygo@latest

      - name: Build dashboard
        if: needs.changes.outputs.go == 'true'
        run: |
          cd dashboard && bun install --frozen-lockfile && cd ..
          ./scripts/build-dashboard.sh

      - name: golangci-lint
        if: steps.check.outputs.has_go_changes == 'true'
        uses: golangci/golangci-lint-action@v7
        with:
          version: v2.9.0

  security:
    name: Security Scan
    needs: changes
    runs-on: ubuntu-latest
    steps:
      - name: Check for Go changes
        id: check
        run: |
          if [ "${{ needs.changes.outputs.go }}" = "true" ]; then
            echo "has_go_changes=true" >> $GITHUB_OUTPUT
          else
            echo "⏭️ No Go files changed, skipping security scan"
            echo "has_go_changes=false" >> $GITHUB_OUTPUT
          fi

      - uses: actions/checkout@v5

      - uses: actions/setup-go@v6
        if: steps.check.outputs.has_go_changes == 'true'
        with:
          go-version: '1.26'

      - name: Install gosec
        if: steps.check.outputs.has_go_changes == 'true'
        run: go install github.com/securego/gosec/v2/cmd/gosec@latest

      - name: Run gosec
        if: steps.check.outputs.has_go_changes == 'true'
        run: gosec -exclude=G301,G302,G304,G306,G404,G107,G115,G703,G704,G705,G706 -fmt=json -out=gosec-results.json ./... || true

      - name: Check critical findings
        if: steps.check.outputs.has_go_changes == 'true'
        run: |
          # Fail on G112 (Slowloris), G204 (command injection)
          ISSUES=$(cat gosec-results.json | jq '[.Issues[] | select(.rule_id == "G112" or .rule_id == "G204")] | length')
          echo "Critical issues: $ISSUES"
          cat gosec-results.json | jq '.Stats'
          if [ "$ISSUES" -gt 0 ]; then
            cat gosec-results.json | jq '.Issues[] | select(.rule_id == "G112" or .rule_id == "G204")'
            exit 1
          fi