name: CI/CD Pipeline

permissions:
  contents: write          # gh-release
  packages: write          # GHCR push
  id-token: write          # Keyless-Signatures & Attestations
  attestations: write      # actions/attest-build-provenance
  security-events: write   # upload-sarif
  actions: read

on:
  push:
    tags:
      - "[0-9]+.[0-9]+.[0-9]+"
      - "[0-9]+.[0-9]+.[0-9]+-rc.[0-9]+"

  workflow_dispatch:
    inputs:
      version:
        description: "SemVer version to release (e.g., 1.2.3, no leading 'v')"
        required: true
        type: string
      target_branch:
        description: "Branch to tag"
        required: false
        default: "main"

concurrency:
  group: ${{ github.workflow }}-${{ github.event_name == 'workflow_dispatch' && github.event.inputs.version || github.ref_name }}
  cancel-in-progress: true

jobs:
  prepare:
    if: github.event_name == 'workflow_dispatch'
    name: Prepare release (create tag)
    runs-on: ubuntu-24.04
    permissions:
      contents: write
    steps:
      - name: Checkout repository
        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
        with:
          fetch-depth: 0

      - name: Validate version input
        shell: bash
        env:
          INPUT_VERSION: ${{ inputs.version }}
        run: |
          set -euo pipefail
          if ! [[ "$INPUT_VERSION" =~ ^[0-9]+\.[0-9]+\.[0-9]+(-rc\.[0-9]+)?$ ]]; then
            echo "Invalid version: $INPUT_VERSION (expected X.Y.Z or X.Y.Z-rc.N)" >&2
            exit 1
          fi
      - name: Create and push tag
        shell: bash
        env:
          TARGET_BRANCH: ${{ inputs.target_branch }}
          VERSION: ${{ inputs.version }}
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          set -euo pipefail
          git config user.name  "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
          git fetch --prune origin
          git checkout "$TARGET_BRANCH"
          git pull --ff-only origin "$TARGET_BRANCH"
          if git rev-parse -q --verify "refs/tags/$VERSION" >/dev/null; then
            echo "Tag $VERSION already exists" >&2
            exit 1
          fi
          git tag -a "$VERSION" -m "Release $VERSION"
          git push origin "refs/tags/$VERSION"
  release:
    if: ${{ github.event_name == 'workflow_dispatch' || (github.event_name == 'push' && github.actor != 'github-actions[bot]') }}
    name: Build and Release
    runs-on: ubuntu-24.04
    timeout-minutes: 120

    steps:
      - name: Checkout code
        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
        with:
          fetch-depth: 0

      - name: Extract tag name
        env:
          EVENT_NAME: ${{ github.event_name }}
          INPUT_VERSION: ${{ inputs.version }}
        run: |
          if [ "$EVENT_NAME" = "workflow_dispatch" ]; then
            echo "TAG=${INPUT_VERSION}" >> $GITHUB_ENV
          else
            echo "TAG=${{ github.ref_name }}" >> $GITHUB_ENV
          fi
        shell: bash

      - name: Validate pushed tag format (no leading 'v')
        if: ${{ github.event_name == 'push' }}
        shell: bash
        env:
          TAG_GOT: ${{ env.TAG }}
        run: |
          set -euo pipefail
          if [[ "$TAG_GOT" =~ ^[0-9]+\.[0-9]+\.[0-9]+(-rc\.[0-9]+)?$ ]]; then
            echo "Tag OK: $TAG_GOT"
            exit 0
          fi
          echo "ERROR: Tag '$TAG_GOT' is not allowed. Use 'X.Y.Z' or 'X.Y.Z-rc.N' (no leading 'v')." >&2
          exit 1
      - name: Wait for tag to be visible (dispatch only)
        if: ${{ github.event_name == 'workflow_dispatch' }}
        run: |
          set -euo pipefail
          for i in {1..90}; do
            if git ls-remote --tags origin "refs/tags/${TAG}" | grep -qE "refs/tags/${TAG}$"; then
              echo "Tag ${TAG} is visible on origin"; exit 0
            fi
            echo "Tag not yet visible, retrying... ($i/90)"
            sleep 2
          done
          echo "Tag ${TAG} not visible after waiting"; exit 1
        shell: bash

      - name: Update version in main.go
        run: |
            TAG=${{ env.TAG }}
            if [ -f main.go ]; then
            sed -i 's/version_replaceme/'"$TAG"'/' main.go
            echo "Updated main.go with version $TAG"
            else
            echo "main.go not found"
            fi

      - name: Ensure repository is at the tagged commit (dispatch only)
        if: ${{ github.event_name == 'workflow_dispatch' }}
        run: |
          set -euo pipefail
          git fetch --tags --force
          git checkout "refs/tags/${TAG}"
          echo "Checked out $(git rev-parse --short HEAD) for tag ${TAG}"
        shell: bash

      - name: Detect release candidate (rc)
        run: |
          set -euo pipefail
          if [[ "${TAG}" =~ ^[0-9]+\.[0-9]+\.[0-9]+-rc\.[0-9]+$ ]]; then
            echo "IS_RC=true" >> $GITHUB_ENV
          else
            echo "IS_RC=false" >> $GITHUB_ENV
          fi
        shell: bash

      - name: Install Go
        uses: actions/setup-go@4dc6199c7b1a012772edbd06daecab0f50c9053c # v6.1.0
        with:
          go-version-file: go.mod

      - name: Cache Go modules
        if: ${{ hashFiles('**/go.sum') != '' }}
        uses: actions/cache@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1
        with:
          path: |
            ~/.cache/go-build
            ~/go/pkg/mod
          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
          restore-keys: |
            ${{ runner.os }}-go-
      - name: Go vet & test
        if: ${{ hashFiles('**/go.mod') != '' }}
        run: |
          go version
          go vet ./...
          go test ./... -race -covermode=atomic
        shell: bash

      # - name: Trivy scan (GHCR image)
      #   id: trivy
      #   uses: aquasecurity/trivy-action@b6643a29fecd7f34b3597bc6acb0a98b03d33ff8 # v0.33.1
      #   with:
      #     image-ref: ${{ env.GHCR_IMAGE }}@${{ steps.build.outputs.digest }}
      #     format: sarif
      #     output: trivy-ghcr.sarif
      #     ignore-unfixed: true
      #     vuln-type: os,library
      #     severity: CRITICAL,HIGH
      #     exit-code: ${{ (vars.TRIVY_FAIL || '0') }}

      # - name: Upload SARIF,trivy
      #   if: ${{ always() && hashFiles('trivy-ghcr.sarif') != '' }}
      #   uses: github/codeql-action/upload-sarif@fdbfb4d2750291e159f0156def62b853c2798ca2 # v4.31.5
      #   with:
      #     sarif_file: trivy-ghcr.sarif
      #     category: Image Vulnerability Scan

      #- name: Build binaries
      #  env:
      #    CGO_ENABLED: "0"
      #    GOFLAGS: "-trimpath"
      #  run: |
      #    set -euo pipefail
      #    TAG_VAR="${TAG}"
      #    make -j 10 go-build-release tag=$TAG_VAR
      #  shell: bash

      - name: Run GoReleaser (binaries + deb/rpm/apk)
        uses: goreleaser/goreleaser-action@v6
        with:
          version: latest
          args: release --clean
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}