name: Build Minecraft Mod

on:
  push:
    branches: [ main ]

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Set up JDK 21
        uses: actions/setup-java@v4
        with:
          distribution: temurin
          java-version: 21

      - name: Ensure Gradle wrapper exists
        run: |
          if [ ! -f "./gradlew" ]; then
            echo "ERROR: gradlew not found in repository!"
            echo "Please run 'gradle wrapper' locally and push the files."
            exit 1
          fi

      - name: Make gradlew executable
        run: chmod +x ./gradlew

      - name: Build mod
        run: ./gradlew build --no-daemon --max-workers=1 -Dorg.gradle.jvmargs="-Xmx1g -XX:MaxMetaspaceSize=256m"

      - name: Read mod info
        id: mod_info
        run: |
          NAME=$(grep "^archives_base_name" gradle.properties | cut -d'=' -f2)
          VERSION=$(grep "^mod_version" gradle.properties | cut -d'=' -f2)

          if [ -z "$NAME" ] || [ -z "$VERSION" ]; then
            echo "Failed to read mod info"
            exit 1
          fi

          JAR="build/libs/${NAME}-${VERSION}.jar"

          if [ ! -f "$JAR" ]; then
            echo "Jar not found: $JAR"
            exit 1
          fi

          echo "NAME=$NAME" >> $GITEA_ENV
          echo "VERSION=$VERSION" >> $GITEA_ENV
          echo "JAR=$JAR" >> $GITEA_ENV

      - name: Upload artifact
        uses: actions/upload-artifact@v3
        with:
          name: minecraft-mod
          path: ${{ env.JAR }}

  release:
    runs-on: ubuntu-latest
    needs: build

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Download artifact
        uses: actions/download-artifact@v3
        with:
          name: minecraft-mod
          path: ./release-artifacts/

      - name: Install jq
        run: apt-get update && apt-get install -y jq

      - name: Read mod info from gradle.properties
        id: mod_info
        run: |
          NAME=$(grep "^archives_base_name" gradle.properties | cut -d'=' -f2)
          VERSION=$(grep "^mod_version" gradle.properties | cut -d'=' -f2)

          if [ -z "$NAME" ] || [ -z "$VERSION" ]; then
            echo "Failed to read mod info"
            exit 1
          fi
          JAR="${NAME}-${VERSION}.jar"
          echo "NAME=$NAME" >> $GITEA_ENV
          echo "VERSION=$VERSION" >> $GITEA_ENV
          echo "JAR=$JAR" >> $GITEA_ENV
      - name: Determine tag
        run: |
          BASE="${NAME}-${VERSION}"
          TAG="$BASE"
          i=1

          while true; do
            STATUS=$(curl -s -o /dev/null -w "%{http_code}" \
              -H "Authorization: token ${{ secrets.GITEATOKEN }}" \
              "${{ gitea.server_url }}/api/v1/repos/${{ gitea.repository }}/releases/tags/$TAG")

            if [ "$STATUS" = "404" ]; then
              break
            fi

            TAG="${BASE}($i)"
            i=$((i+1))
          done

          echo "TAG=$TAG" >> $GITEA_ENV

      - name: Create release
        uses: softprops/action-gh-release@v1
        with:
          files: build/libs/*.jar
          tag_name: ${{ env.TAG }}
        env:
          GITHUB_TOKEN: ${{ secrets.GITEATOKEN }}

      - name: Get release ID
        run: |
          RELEASE_ID=$(curl -s \
            -H "Authorization: token ${{ secrets.GITEATOKEN }}" \
            "${{ gitea.server_url }}/api/v1/repos/${{ gitea.repository }}/releases/tags/${TAG}" \
            | jq -r '.id')

          echo "RELEASE_ID=$RELEASE_ID" >> $GITEA_ENV

      - name: Upload the mod JAR
        run: |
          # Find the largest JAR file (the main mod file is 120 MiB, others are KiB)
          JAR_FILE=$(ls -S ./release-artifacts/*.jar | head -n 1)

          if [ ! -f "$JAR_FILE" ]; then
            echo "Error: Main JAR not found in ./release-artifacts/"
            exit 1
          fi

          echo "Uploading largest file: $(basename $JAR_FILE)"

          curl -X POST \
            -H "Authorization: token ${{ secrets.GITEATOKEN }}" \
            -H "Content-Type: application/java-archive" \
            --data-binary @"$JAR_FILE" \
            "${{ gitea.server_url }}/api/v1/repos/${{ gitea.repository }}/releases/${RELEASE_ID}/assets?name=$(basename $JAR_FILE)"