name: Release

on:
  push:
    branches:
      - main
    tags-ignore:
      - "v*"

permissions:
  contents: write

concurrency:
  group: release-${{ github.ref }}
  cancel-in-progress: false

jobs:
  release:
    if: github.actor != 'github-actions[bot]'
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Setup Go
        uses: actions/setup-go@v5
        with:
          go-version-file: go.mod

      - name: Compute next version
        id: version
        shell: bash
        run: |
          set -euo pipefail
          latest_tag="$(git tag --list 'v*' --sort=-v:refname | head -n 1)"
          if [ -z "$latest_tag" ]; then
            next_tag="v0.1.0"
          else
            base="${latest_tag#v}"
            IFS='.' read -r major minor patch <<< "$base"
            patch=$((patch + 1))
            next_tag="v${major}.${minor}.${patch}"
          fi
          echo "next_tag=$next_tag" >> "$GITHUB_OUTPUT"
          echo "version=${next_tag#v}" >> "$GITHUB_OUTPUT"

      - name: Commit VERSION
        shell: bash
        run: |
          set -euo pipefail
          echo "${{ steps.version.outputs.version }}" > VERSION
          if git diff --quiet VERSION; then
            echo "VERSION unchanged"
          else
            git config user.name "github-actions[bot]"
            git config user.email "github-actions[bot]@users.noreply.github.com"
            git add VERSION
            git commit -m "chore(release): ${{ steps.version.outputs.next_tag }} [skip ci]"
            git push origin HEAD:main
          fi

      - name: Create tag
        shell: bash
        run: |
          set -euo pipefail
          git fetch --tags
          if git rev-parse "${{ steps.version.outputs.next_tag }}" >/dev/null 2>&1; then
            echo "Tag already exists: ${{ steps.version.outputs.next_tag }}"
          else
            git tag "${{ steps.version.outputs.next_tag }}"
            git push origin "${{ steps.version.outputs.next_tag }}"
          fi

      - name: Build release binaries
        shell: bash
        run: |
          set -euo pipefail
          mkdir -p dist
          version="${{ steps.version.outputs.next_tag }}"

          GOOS=linux GOARCH=amd64 go build -ldflags "-X main.version=${version}" -o "dist/agentikube_${version}_linux_amd64" ./cmd/agentikube
          GOOS=linux GOARCH=arm64 go build -ldflags "-X main.version=${version}" -o "dist/agentikube_${version}_linux_arm64" ./cmd/agentikube
          GOOS=darwin GOARCH=amd64 go build -ldflags "-X main.version=${version}" -o "dist/agentikube_${version}_darwin_amd64" ./cmd/agentikube
          GOOS=darwin GOARCH=arm64 go build -ldflags "-X main.version=${version}" -o "dist/agentikube_${version}_darwin_arm64" ./cmd/agentikube
          GOOS=windows GOARCH=amd64 go build -ldflags "-X main.version=${version}" -o "dist/agentikube_${version}_windows_amd64.exe" ./cmd/agentikube

      - name: Create GitHub release
        uses: softprops/action-gh-release@v2
        with:
          tag_name: ${{ steps.version.outputs.next_tag }}
          name: ${{ steps.version.outputs.next_tag }}
          generate_release_notes: true
          files: dist/*