name: Nightly Release

on:
  workflow_dispatch:
  push:
    branches:
      - 'main'
    paths-ignore:
      - '.gitignore'
      - '*.md'
      - '.gitea/**'
      - '!.gitea/workflows/nightly.yml'

permissions:
  contents: write

concurrency:
  group: nightly
  cancel-in-progress: true

jobs:
  build:
    runs-on: ubuntu-latest

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

    - name: Install Nix
      uses: https://github.com/cachix/install-nix-action@v27
      with:
        extra_nix_config: |
          experimental-features = nix-command flakes
          accept-flake-config = true

    # Caches the Nix store so the Windows SDK fixed-output derivation
    # (downloaded via xwin) is not re-fetched on every run.
    - name: Cache Nix store
      uses: actions/cache@v4
      with:
        path: |
          ~/.cache/nix
          /nix/store
          /nix/var/nix/db
          /nix/var/nix/gcroots
        key: nix-${{ runner.os }}-${{ hashFiles('flake.lock') }}
        restore-keys: |
          nix-${{ runner.os }}-

    - name: Build
      run: nix build .#unwrapped --out-link result-unwrapped

    - name: Package artifacts
      run: |
        mkdir -p staging

        # Client zip (full runtime)
        cd result-unwrapped/client
        zip -r ../../staging/LCEWindows64.zip .
        # Standalone exe for quick updates
        cp Minecraft.Client.exe ../../staging/
        cd ../..

    - name: Upload build artifacts
      uses: actions/upload-artifact@v4
      with:
        name: build-windows64
        path: staging/*

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

    steps:
    - name: Download build artifacts
      uses: actions/download-artifact@v4
      with:
        path: artifacts
        merge-multiple: true

    - name: Publish nightly release
      env:
        FORGEJO_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      run: |
        set -euo pipefail

        API="${{ github.server_url }}/api/v1"
        REPO="${{ github.repository }}"
        TAG="nightly"
        AUTH="Authorization: token $FORGEJO_TOKEN"

        # Check whether the nightly tag/release already exists
        HTTP_STATUS=$(curl -s -o /dev/null -w "%{http_code}" \
          -H "$AUTH" \
          "$API/repos/$REPO/releases/tags/$TAG")

        if [[ "$HTTP_STATUS" == "200" ]]; then
          echo "[info] Updating existing nightly release..."
          RELEASE=$(curl -s -H "$AUTH" "$API/repos/$REPO/releases/tags/$TAG")
          RELEASE_ID=$(echo "$RELEASE" | jq -r '.id')

          # Wipe all existing assets so the release stays current
          ASSETS=$(curl -s -H "$AUTH" "$API/repos/$REPO/releases/$RELEASE_ID/assets")
          for ASSET_ID in $(echo "$ASSETS" | jq -r '.[].id'); do
            curl -s -X DELETE -H "$AUTH" \
              "$API/repos/$REPO/releases/$RELEASE_ID/assets/$ASSET_ID"
          done

          # Update release metadata
          curl -s -X PATCH \
            -H "$AUTH" -H "Content-Type: application/json" \
            "$API/repos/$REPO/releases/$RELEASE_ID" \
            -d '{
              "name": "Nightly Client Release",
              "prerelease": true,
              "body": "Requires at least Windows 7 and a DirectX 11 compatible GPU.\n\n# \ud83d\udea8 First time here? \ud83d\udea8\nDownload `LCEWindows64.zip` and extract it to the folder where you want to keep the game. The other files are already inside the `.zip`!"
            }'
        else
          echo "[info] Creating new nightly release..."
          RELEASE=$(curl -s -X POST \
            -H "$AUTH" -H "Content-Type: application/json" \
            "$API/repos/$REPO/releases" \
            -d '{
              "tag_name": "'"$TAG"'",
              "name": "Nightly Client Release",
              "prerelease": true,
              "body": "Requires at least Windows 7 and a DirectX 11 compatible GPU.\n\n# \ud83d\udea8 First time here? \ud83d\udea8\nDownload `LCEWindows64.zip` and extract it to the folder where you want to keep the game. The other files are already inside the `.zip`!"
            }')
          RELEASE_ID=$(echo "$RELEASE" | jq -r '.id')
        fi

        echo "[info] Uploading assets to release $RELEASE_ID..."
        for FILE in artifacts/*; do
          FILENAME=$(basename "$FILE")
          echo "[info]   -> $FILENAME"
          curl -s -X POST \
            -H "$AUTH" \
            -F "attachment=@$FILE;filename=$FILENAME" \
            "$API/repos/$REPO/releases/$RELEASE_ID/assets" > /dev/null
        done
        echo "[info] Done."

  cleanup:
    needs: [build, release]
    if: always()
    runs-on: ubuntu-latest
    steps:
    - name: Delete build artifacts
      env:
        FORGEJO_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      run: |
        API="${{ github.server_url }}/api/v1"
        REPO="${{ github.repository }}"
        AUTH="Authorization: token $FORGEJO_TOKEN"

        ARTIFACTS=$(curl -s -H "$AUTH" \
          "$API/repos/$REPO/actions/artifacts?name=build-windows64")

        for ARTIFACT_ID in $(echo "$ARTIFACTS" | jq -r '.artifacts[].id // empty'); do
          echo "[info] Deleting artifact $ARTIFACT_ID"
          curl -s -X DELETE -H "$AUTH" \
            "$API/repos/$REPO/actions/artifacts/$ARTIFACT_ID"
        done