name: Release (shared)

on:
  workflow_call:
    inputs:
      platform:
        description: "paper or velocity"
        required: true
        type: string
      modrinth-game-versions:
        description: "Newline-separated Minecraft versions listed on Modrinth"
        required: true
        type: string
      modrinth-mc-version:
        description: "Minecraft version shown in the Modrinth version name (paper only)"
        required: false
        type: string
        default: ""
    secrets:
      MODRINTH_TOKEN:
        required: true
      MODRINTH_PROJECT_ID:
        required: true

jobs:
  validate:
    runs-on: ubuntu-24.04
    outputs:
      version: ${{ steps.get_version.outputs.version }}
      jar_name: ${{ steps.get_version.outputs.jar_name }}
      module: ${{ steps.get_version.outputs.module }}
      label: ${{ steps.get_version.outputs.label }}
      modrinth_name: ${{ steps.get_version.outputs.modrinth_name }}
      modrinth_version: ${{ steps.get_version.outputs.modrinth_version }}
      modrinth_loaders: ${{ steps.get_version.outputs.modrinth_loaders }}
    steps:
      - name: Checkout repository
        uses: actions/checkout@v6

      - name: Extract version from tag and validate
        id: get_version
        env:
          PLATFORM: ${{ inputs.platform }}
          MC_VERSION: ${{ inputs.modrinth-mc-version }}
        run: |
          # Paper keeps the bare vX.Y.Z tag so that UpdateChecker in already-deployed
          # Paper builds, which strips only a leading "v", keeps recognising new releases.
          case "$PLATFORM" in
            paper)
              TAG_PREFIX="v"
              VERSION_KEY="paperVersion"
              JAR_SUFFIX=""
              MODULE="platform-paper"
              LABEL="Paper/Folia"
              ;;
            velocity)
              TAG_PREFIX="velocity/v"
              VERSION_KEY="velocityVersion"
              JAR_SUFFIX="-velocity"
              MODULE="platform-velocity"
              LABEL="Velocity"
              ;;
            *)
              echo "Error: unknown platform '$PLATFORM'"
              exit 1
              ;;
          esac

          TAG_NAME=${GITHUB_REF#refs/tags/}
          if [[ ! "$TAG_NAME" =~ ^${TAG_PREFIX}[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
            echo "Error: Tag $TAG_NAME does not match ${TAG_PREFIX}X.Y.Z"
            exit 1
          fi

          TAG_VERSION=${TAG_NAME#"$TAG_PREFIX"}
          GRADLE_VERSION=$(grep "^${VERSION_KEY}=" gradle.properties | cut -d'=' -f2)
          if [ "$TAG_VERSION" != "$GRADLE_VERSION" ]; then
            echo "Error: Tag version ($TAG_VERSION) does not match gradle.properties $VERSION_KEY ($GRADLE_VERSION)"
            exit 1
          fi

          if [ "$PLATFORM" = "paper" ]; then
            MODRINTH_NAME="v${TAG_VERSION} (${LABEL} v${MC_VERSION})"
            MODRINTH_VERSION="$TAG_VERSION"
            MODRINTH_LOADERS=$'paper\nfolia'
          else
            MODRINTH_NAME="v${TAG_VERSION} (${LABEL})"
            MODRINTH_VERSION="${TAG_VERSION}-velocity"
            MODRINTH_LOADERS="velocity"
          fi

          {
            echo "version=$TAG_VERSION"
            echo "jar_name=LunaticChat-${TAG_VERSION}${JAR_SUFFIX}.jar"
            echo "module=$MODULE"
            echo "label=$LABEL"
            echo "modrinth_name=$MODRINTH_NAME"
            echo "modrinth_version=$MODRINTH_VERSION"
            echo "modrinth_loaders<<EOF"
            echo "$MODRINTH_LOADERS"
            echo "EOF"
          } >> "$GITHUB_OUTPUT"
          echo "Version validation passed: $TAG_NAME"

      - name: Check if release already exists
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          TAG_NAME=${GITHUB_REF#refs/tags/}
          if gh release view "$TAG_NAME" &> /dev/null; then
            echo "Error: Release $TAG_NAME already exists"
            exit 1
          fi
          echo "Release validation passed: $TAG_NAME does not exist yet"

  build:
    runs-on: ubuntu-24.04
    needs: validate
    steps:
      - name: Checkout repository
        uses: actions/checkout@v6

      - name: Setup Development Environment
        uses: jdx/mise-action@v4

      - name: Setup Gradle
        uses: gradle/actions/setup-gradle@v6

      - name: Grant execute permission for gradlew
        run: chmod +x gradlew

      - name: Build shadowJar
        run: ./gradlew :${{ needs.validate.outputs.module }}:shadowJar --no-daemon

      - name: Upload build artifact
        uses: actions/upload-artifact@v7
        with:
          name: LunaticChat-${{ inputs.platform }}-v${{ needs.validate.outputs.version }}
          path: ${{ needs.validate.outputs.module }}/build/libs/${{ needs.validate.outputs.jar_name }}
          retention-days: 90

  release:
    runs-on: ubuntu-24.04
    needs: [validate, build]
    permissions:
      contents: write
    steps:
      - name: Checkout repository
        uses: actions/checkout@v6

      - name: Download build artifact
        uses: actions/download-artifact@v8
        with:
          name: LunaticChat-${{ inputs.platform }}-v${{ needs.validate.outputs.version }}
          path: ${{ needs.validate.outputs.module }}/build/libs

      # Created as a draft, so "latest" is decided when it is published, not here:
      # GitHub makes a newly published release the latest one unless told otherwise.
      - name: Create GitHub Release
        env:
          GH_TOKEN: ${{ github.token }}
          PLATFORM: ${{ inputs.platform }}
          VERSION: ${{ needs.validate.outputs.version }}
          JAR_PATH: ${{ needs.validate.outputs.module }}/build/libs/${{ needs.validate.outputs.jar_name }}
          LABEL: ${{ needs.validate.outputs.label }}
        run: |
          TAG_NAME=${GITHUB_REF#refs/tags/}

          # The notes point at the changelog on the documentation site rather than
          # repeating it here, so the release notes live in exactly one place.
          gh release create "$TAG_NAME" \
            "$JAR_PATH" \
            --title "v${VERSION} (${LABEL})" \
            --draft \
            --notes "Release notes: [${LABEL} v${VERSION}](https://lc.m1sk9.dev/changelog/${PLATFORM}/v${VERSION})"

      - name: Publish to Modrinth
        uses: cloudnode-pro/modrinth-publish@3870f66007063f03fb70118ca9eddbc09a4ba666 # v2
        with:
          token: ${{ secrets.MODRINTH_TOKEN }}
          name: ${{ needs.validate.outputs.modrinth_name }}
          project: ${{ secrets.MODRINTH_PROJECT_ID }}
          version: ${{ needs.validate.outputs.modrinth_version }}
          channel: release
          changelog: |-
            Please refer to the [release notes](https://lc.m1sk9.dev/changelog/${{ inputs.platform }}/v${{ needs.validate.outputs.version }}) for update details.
          loaders: ${{ needs.validate.outputs.modrinth_loaders }}
          game-versions: ${{ inputs.modrinth-game-versions }}
          files: ${{ needs.validate.outputs.module }}/build/libs/${{ needs.validate.outputs.jar_name }}