name: CI

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

jobs:
  # Fast check to catch accidental .beads/issues.jsonl changes from contributors
  check-no-beads-changes:
    name: Check for .beads changes
    runs-on: ubuntu-latest
    if: github.event_name == 'pull_request'
    steps:
      - uses: actions/checkout@v6
        with:
          fetch-depth: 0

      - name: Check for .beads/issues.jsonl changes
        run: |
          if git diff --name-only origin/${{ github.base_ref }}...HEAD | grep -q "^\.beads/issues\.jsonl$"; then
            echo "This PR includes changes to .beads/issues.jsonl"
            echo ""
            echo "This file is the project's issue database and should not be modified in PRs."
            echo ""
            echo "To fix, run:"
            echo "  git checkout origin/main -- .beads/issues.jsonl"
            echo "  git commit --amend"
            echo "  git push --force"
            echo ""
            exit 1
          fi
          echo "No .beads/issues.jsonl changes detected"

  # Verify committed formulas allow build without go:generate
  # This catches issues where go install @latest would fail
  check-embedded-formulas:
    name: Check embedded formulas
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v6

      - name: Set up Go
        uses: actions/setup-go@v5
        with:
          go-version: '1.24'

      - name: Build without go:generate
        run: |
          # This must succeed with committed formulas only
          # If this fails, run: go generate ./... && git add -A && git commit
          go build -v ./cmd/gt

      - name: Verify formulas are in sync
        run: |
          # Regenerate and check for differences
          go generate ./internal/formula/...
          if ! git diff --exit-code internal/formula/formulas/; then
            echo ""
            echo "ERROR: Committed formulas are out of sync with .beads/formulas/"
            echo "Run: go generate ./... && git add -A && git commit"
            exit 1
          fi

  test:
    name: Test
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v6
        with:
          fetch-depth: 0

      - name: Set up Go
        uses: actions/setup-go@v5
        with:
          go-version: '1.24'

      - name: Configure Git
        run: |
          git config --global user.name "CI Bot"
          git config --global user.email "ci@gastown.test"

      - name: Build
        run: go build -v ./cmd/gt

      - name: Test with Coverage
        run: |
          go test -race -short -coverprofile=coverage.out ./... 2>&1 | tee test-output.txt

      - name: Upload Coverage Data
        if: github.event_name == 'pull_request'
        uses: actions/upload-artifact@v4
        with:
          name: coverage-data
          path: |
            coverage.out
            test-output.txt

  # Separate job to process coverage after ALL tests complete
  coverage:
    name: Coverage Report
    runs-on: ubuntu-latest
    needs: [test, integration]
    if: github.event_name == 'pull_request'
    steps:
      - uses: actions/checkout@v6

      - name: Set up Go
        uses: actions/setup-go@v5
        with:
          go-version: '1.24'

      - name: Download Coverage Data
        uses: actions/download-artifact@v4
        with:
          name: coverage-data

      - name: Generate Coverage Report
        run: |
          # Parse per-package coverage from test output
          echo "## Code Coverage Report" > coverage-report.md
          echo "" >> coverage-report.md

          # Get overall coverage
          TOTAL=$(go tool cover -func=coverage.out | grep total | awk '{print $3}')
          echo "**Overall Coverage: ${TOTAL}**" >> coverage-report.md
          echo "" >> coverage-report.md

          # Create per-package table
          echo "| Package | Coverage |" >> coverage-report.md
          echo "|---------|----------|" >> coverage-report.md

          # Extract package coverage from all test output lines
          grep -E "github.com/steveyegge/gastown.*coverage:" test-output.txt | \
            sed 's/.*github.com\/steveyegge\/gastown\///' | \
            awk '{
              pkg = $1
              for (i=2; i<=NF; i++) {
                if ($i == "coverage:") {
                  cov = $(i+1)
                  break
                }
              }
              printf "| %s | %s |\n", pkg, cov
            }' | sort -u >> coverage-report.md

          echo "" >> coverage-report.md
          echo "---" >> coverage-report.md
          echo "_Generated by CI_" >> coverage-report.md

          # Show in logs
          cat coverage-report.md

      - name: Upload Coverage Report
        uses: actions/upload-artifact@v4
        with:
          name: coverage-report
          path: coverage-report.md
          retention-days: 30

      - name: Comment Coverage on PR
        # Only for internal PRs - fork PRs can't write comments
        if: github.event.pull_request.head.repo.full_name == github.repository
        uses: actions/github-script@v7
        with:
          script: |
            const fs = require('fs');
            const report = fs.readFileSync('coverage-report.md', 'utf8');

            // Find existing coverage comment
            const { data: comments } = await github.rest.issues.listComments({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number,
            });

            const botComment = comments.find(comment =>
              comment.user.type === 'Bot' &&
              comment.body.includes('## Code Coverage Report')
            );

            if (botComment) {
              await github.rest.issues.updateComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                comment_id: botComment.id,
                body: report
              });
            } else {
              await github.rest.issues.createComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: context.issue.number,
                body: report
              });
            }

      - name: Coverage Note for Fork PRs
        if: github.event.pull_request.head.repo.full_name != github.repository
        run: |
          echo "::notice::Coverage report uploaded as artifact (fork PRs cannot post comments). Download from Actions tab."

  lint:
    name: Lint
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v6

      - name: Set up Go
        uses: actions/setup-go@v5
        with:
          go-version: '1.24'

      - name: golangci-lint
        uses: golangci/golangci-lint-action@v9
        with:
          version: latest
          args: --timeout=5m

  integration:
    name: Integration Tests
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v6

      - name: Set up Go
        uses: actions/setup-go@v5
        with:
          go-version: '1.24'

      - name: Configure Git
        run: |
          git config --global user.name "CI Bot"
          git config --global user.email "ci@gastown.test"

      - name: Install beads (bd)
        # Pin to v0.47.1 - v0.47.2 has routing defaults that cause prefix mismatch errors
        run: go install github.com/steveyegge/beads/cmd/bd@v0.47.1

      - name: Build gt
        run: go build -v -o gt ./cmd/gt

      - name: Add to PATH
        run: echo "$(go env GOPATH)/bin" >> $GITHUB_PATH

      - name: Integration Tests
        run: go test -tags=integration -timeout=5m -v ./internal/cmd/...