name: Build packages
on:
  push:
    tags:
      - "*"
  workflow_dispatch:
    inputs:
      release_tag:
        description: Release tag to build and publish
        required: true
        type: string
      release_notes:
        description: Optional release notes/comment
        required: false
        type: string

permissions:
  contents: write

jobs:
  preparation:
    name: Setup build version
    runs-on: ubuntu-latest
    outputs:
      version: ${{ steps.version.outputs.version }}
      commitish: ${{ steps.version.outputs.commitish }}
    steps:
      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
        with:
          fetch-depth: 0
      - id: version
        shell: bash
        run: |
          INPUT_VERSION="${{ inputs.release_tag || '' }}"
          if [ -n "$INPUT_VERSION" ]; then
            VERSION="$INPUT_VERSION"
          else
            VERSION=$(git describe --tags --exact-match 2>/dev/null || true)
          fi
          VERSION="${VERSION#v}"
          if [[ ! "$VERSION" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
            echo "Release version must use x.y.z format, got: ${VERSION:-<empty>}" >&2
            exit 1
          fi
          echo "version=$VERSION" >> "$GITHUB_OUTPUT"
          echo "commitish=$(git rev-parse HEAD)" >> "$GITHUB_OUTPUT"

  build:
    name: Build Tachyon release packages
    runs-on: ubuntu-latest
    needs: preparation
    steps:
      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
        with:
          fetch-depth: 0

      - name: Build release artifacts
        shell: bash
        run: |
          VERSION="${{ needs.preparation.outputs.version }}"
          bash ./build.sh "$VERSION" "$PWD/filtered-bin/release"

          ls -la "$PWD/filtered-bin/release"

      - name: Upload build artifacts
        uses: actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1 # v4.6.1
        with:
          name: release-files-${{ needs.preparation.outputs.version }}
          path: ./filtered-bin/release/*
          retention-days: 1
          if-no-files-found: error

  release:
    name: Create Release
    runs-on: ubuntu-latest
    needs:
      - preparation
      - build
    steps:
      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
      - name: Create release dir
        run: mkdir -p ./filtered-bin/release

      - name: Download release artifacts
        uses: actions/download-artifact@cc203385981b70ca67e1cc392babf9cc229d5806 # v4.1.9
        with:
          name: release-files-${{ needs.preparation.outputs.version }}
          path: ./filtered-bin/release

      - name: Prepare release notes
        id: prepare_notes
        shell: bash
        env:
          GH_TOKEN: ${{ github.token }}
          TAG_NAME: ${{ github.event_name == 'push' && github.ref_name || needs.preparation.outputs.version }}
          COMMIT_SHA: ${{ needs.preparation.outputs.commitish }}
          WORKFLOW_NOTES: ${{ github.event_name == 'workflow_dispatch' && inputs.release_notes || '' }}
        run: |
          EXISTING_BODY=""
          if gh release view "$TAG_NAME" >/dev/null 2>&1; then
            EXISTING_BODY="$(gh release view "$TAG_NAME" --json body -q .body 2>/dev/null || true)"
          fi

          TRIMMED="$(printf '%s' "$EXISTING_BODY" | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//')"
          if [ -n "$TRIMMED" ] && ! printf '%s\n' "$TRIMMED" | grep -Eq '^Commit:[[:space:]]*[0-9a-fA-F]+$'; then
            echo "Existing release notes found for $TAG_NAME. Preserving them."
            printf '%s\n' "$EXISTING_BODY" > ./release_notes.md
            echo "generate_notes=false" >> "$GITHUB_OUTPUT"
          elif [ -n "$WORKFLOW_NOTES" ]; then
            echo "Using workflow_dispatch release notes."
            printf 'Commit: %s\n\n%s\n' "$COMMIT_SHA" "$WORKFLOW_NOTES" > ./release_notes.md
            echo "generate_notes=false" >> "$GITHUB_OUTPUT"
          else
            echo "No existing release notes found. Using commit placeholder."
            printf 'Commit: %s\n' "$COMMIT_SHA" > ./release_notes.md
            echo "generate_notes=true" >> "$GITHUB_OUTPUT"
          fi

      - name: Release on tag push
        if: ${{ github.event_name == 'push' }}
        uses: softprops/action-gh-release@c95fe1489396fe8a9eb87c0abf8aa5b2ef267fda # v2.2.1
        with:
          files: ./filtered-bin/release/*
          tag_name: ${{ github.ref_name }}
          name: ${{ github.ref_name }}
          target_commitish: ${{ needs.preparation.outputs.commitish }}
          generate_release_notes: ${{ steps.prepare_notes.outputs.generate_notes == 'true' }}
          draft: false
          prerelease: false
          make_latest: true
          overwrite_files: true
          body_path: ./release_notes.md

      - name: Release on workflow dispatch
        if: ${{ github.event_name == 'workflow_dispatch' }}
        uses: softprops/action-gh-release@c95fe1489396fe8a9eb87c0abf8aa5b2ef267fda # v2.2.1
        with:
          files: ./filtered-bin/release/*
          tag_name: ${{ needs.preparation.outputs.version }}
          name: ${{ needs.preparation.outputs.version }}
          target_commitish: ${{ needs.preparation.outputs.commitish }}
          generate_release_notes: ${{ steps.prepare_notes.outputs.generate_notes == 'true' }}
          draft: false
          prerelease: false
          make_latest: true
          overwrite_files: true
          body_path: ./release_notes.md