name: Release Agent SDK

on:
  workflow_dispatch:

concurrency:
  group: release-agent-sdk
  cancel-in-progress: false

jobs:
  publish:
    if: github.ref == 'refs/heads/main'
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: write
    defaults:
      run:
        working-directory: packages/browseros-agent/packages/agent-sdk

    steps:
      - uses: actions/checkout@v6
        with:
          fetch-depth: 0

      - uses: oven-sh/setup-bun@v2

      - uses: actions/setup-node@v6
        with:
          node-version: "20"
          registry-url: "https://registry.npmjs.org"

      - name: Install dependencies
        run: bun ci
        working-directory: packages/browseros-agent

      - name: Build
        run: bun run build

      - name: Test
        run: bun test

      - name: Get version
        id: version
        run: |
          echo "version=$(node -p "require('./package.json').version")" >> "$GITHUB_OUTPUT"
          echo "release_sha=$(git rev-parse HEAD)" >> "$GITHUB_OUTPUT"

      - name: Generate release notes
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          SDK_PATH="packages/browseros-agent/packages/agent-sdk"
          CURRENT_TAG="agent-sdk-v${{ steps.version.outputs.version }}"
          # Find the previous tag, excluding the current version's tag
          # (which may already exist from a prior failed run)
          PREV_TAG=$(git tag -l "agent-sdk-v*" --sort=-v:refname | grep -v "^${CURRENT_TAG}$" | head -n 1)

          if [ -z "$PREV_TAG" ]; then
            echo "Initial release" > /tmp/release-notes.md
          else
            # Get commits scoped to the SDK directory
            COMMITS=$(git log "$PREV_TAG"..HEAD --pretty=format:"%H" -- "$SDK_PATH")

            if [ -z "$COMMITS" ]; then
              echo "No notable changes." > /tmp/release-notes.md
            else
              echo "## What's Changed" > /tmp/release-notes.md
              echo "" >> /tmp/release-notes.md

              # For each commit, find the associated PR and format with author
              CONTRIBUTORS=""
              while IFS= read -r SHA; do
                # Get commit subject and author
                SUBJECT=$(git log -1 --pretty=format:"%s" "$SHA")
                AUTHOR=$(git log -1 --pretty=format:"%an" "$SHA")
                GITHUB_USER=$(gh api "/repos/${{ github.repository }}/commits/${SHA}" --jq '.author.login // empty' 2>/dev/null)

                # Find associated PR number
                PR_NUM=$(gh api "/repos/${{ github.repository }}/commits/${SHA}/pulls" --jq '.[0].number // empty' 2>/dev/null)

                # Format line: skip PR number if already in the commit subject
                # (squash merges include "(#123)" in the subject automatically)
                if [ -n "$PR_NUM" ] && ! echo "$SUBJECT" | grep -qF "(#${PR_NUM})"; then
                  echo "- ${SUBJECT} (#${PR_NUM})" >> /tmp/release-notes.md
                else
                  echo "- ${SUBJECT}" >> /tmp/release-notes.md
                fi
              done <<< "$COMMITS"
            fi
          fi
        working-directory: ${{ github.workspace }}

      - name: Publish
        run: npm publish --access public
        env:
          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

      - name: Create GitHub release
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          TAG="agent-sdk-v${{ steps.version.outputs.version }}"
          RELEASE_SHA="${{ steps.version.outputs.release_sha }}"
          TITLE="@browseros-ai/agent-sdk v${{ steps.version.outputs.version }}"

          # Create or reuse tag (idempotent for re-runs)
          if git rev-parse "$TAG" >/dev/null 2>&1; then
            echo "Tag $TAG already exists, skipping tag creation"
          else
            git tag "$TAG" "$RELEASE_SHA"
          fi

          # Push tag (skip if already on remote)
          if git ls-remote --tags origin "$TAG" | grep -q "$TAG"; then
            echo "Tag $TAG already on remote, skipping push"
          else
            git push origin "$TAG"
          fi

          # Create or update release
          if gh release view "$TAG" >/dev/null 2>&1; then
            echo "Release $TAG already exists, updating"
            gh release edit "$TAG" --title "$TITLE" --notes-file /tmp/release-notes.md
          else
            gh release create "$TAG" --title "$TITLE" --notes-file /tmp/release-notes.md
          fi
        working-directory: ${{ github.workspace }}

      - name: Update CHANGELOG.md via PR
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          VERSION="${{ steps.version.outputs.version }}"
          DATE=$(date -u +"%Y-%m-%d")
          BRANCH="docs/agent-sdk-changelog-v${VERSION}"
          CHANGELOG="packages/browseros-agent/packages/agent-sdk/CHANGELOG.md"

          # Return to main before branching
          git checkout main

          # Use head/tail to safely insert without sed quoting issues
          {
            head -n 1 "$CHANGELOG"
            echo ""
            echo "## v${VERSION} (${DATE})"
            echo ""
            cat /tmp/release-notes.md
            echo ""
            tail -n +2 "$CHANGELOG"
          } > /tmp/new-changelog.md
          mv /tmp/new-changelog.md "$CHANGELOG"

          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"
          git checkout -b "$BRANCH"
          git add "$CHANGELOG"
          git commit -m "docs: update agent-sdk changelog for v${VERSION}"
          git push origin "$BRANCH"

          gh pr create \
            --title "docs: update agent-sdk changelog for v${VERSION}" \
            --body "Auto-generated changelog update for @browseros-ai/agent-sdk v${VERSION}." \
            --base main \
            --head "$BRANCH"

          gh pr merge "$BRANCH" --squash --auto || true
        working-directory: ${{ github.workspace }}