name: Release BrowserOS Extension

on:
  workflow_dispatch:

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

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

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

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

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

      - name: Build and zip extension
        run: bun run codegen && bun run zip
        env:
          VITE_PUBLIC_BROWSEROS_API: https://api.browseros.com

      - name: Get version and zip path
        id: version
        run: |
          echo "version=$(node -p "require('./package.json').version")" >> "$GITHUB_OUTPUT"
          echo "release_sha=$(git rev-parse HEAD)" >> "$GITHUB_OUTPUT"
          ZIP_FILE=$(ls "$(pwd)/dist/"*-chrome.zip | head -n 1)
          echo "zip_path=$ZIP_FILE" >> "$GITHUB_OUTPUT"
          echo "zip_name=$(basename "$ZIP_FILE")" >> "$GITHUB_OUTPUT"

      - name: Generate release notes
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          AGENT_PATH="packages/browseros-agent/apps/agent"
          CURRENT_TAG="agent-extension-v${{ steps.version.outputs.version }}"
          PREV_TAG=$(git tag -l "agent-extension-v*" --sort=-v:refname | grep -v "^${CURRENT_TAG}$" | head -n 1)

          if [ -z "$PREV_TAG" ]; then
            echo "Initial release" > /tmp/release-notes.md
          else
            COMMITS=$(git log "$PREV_TAG"..HEAD --pretty=format:"%H" -- "$AGENT_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

              while IFS= read -r SHA; do
                SUBJECT=$(git log -1 --pretty=format:"%s" "$SHA")
                PR_NUM=$(gh api "/repos/${{ github.repository }}/commits/${SHA}/pulls" --jq '.[0].number // empty' 2>/dev/null)

                # Skip PR number if already in the commit subject (squash merges include it)
                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: Create GitHub release
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          TAG="agent-extension-v${{ steps.version.outputs.version }}"
          RELEASE_SHA="${{ steps.version.outputs.release_sha }}"
          TITLE="BrowserOS Extension - v${{ steps.version.outputs.version }}"

          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

          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

          if gh release view "$TAG" >/dev/null 2>&1; then
            echo "Release $TAG already exists, updating"
            gh release edit "$TAG" --title "$TITLE" --notes-file /tmp/release-notes.md
            gh release upload "$TAG" "${{ steps.version.outputs.zip_path }}" --clobber
          else
            gh release create "$TAG" \
              --title "$TITLE" \
              --notes-file /tmp/release-notes.md \
              "${{ steps.version.outputs.zip_path }}"
          fi
        working-directory: ${{ github.workspace }}

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

          git checkout main

          {
            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 extension changelog for v${VERSION}"
          git push origin "$BRANCH"

          gh pr create \
            --title "docs: update agent extension changelog for v${VERSION}" \
            --body "Auto-generated changelog update for BrowserOS Extension v${VERSION}." \
            --base main \
            --head "$BRANCH"

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