name: Build KernelSU Kernel Module

on:
  workflow_call:
    inputs:
      kmi:
        description: 'KMI version'
        required: true
        type: string
      ddk_release:
        description: 'DDK release version'
        required: false
        default: '20251016'
        type: string

jobs:
  build-kernelsu-ko:
    name: Build kernelsu.ko for ${{ inputs.kmi }}
    runs-on: ubuntu-latest
    container:
      image: ghcr.io/ylarod/ddk:${{ inputs.kmi }}-${{ inputs.ddk_release }}
      options: --privileged

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

    - name: Get version info from GitHub API
      id: version
      run: |
        REPO_OWNER="SukiSU-Ultra"
        REPO_NAME="SukiSU-Ultra"
        REPO_BRANCH="${GITHUB_HEAD_REF:-${GITHUB_REF_NAME}}"
        KSU_VERSION_API="3.2.0"

        GITHUB_VERSION=$(curl -s "https://api.github.com/repos/$REPO_OWNER/$REPO_NAME/releases/latest" | grep '"tag_name":' | sed -E 's/.*"v([^"]+)".*/\1/')
        GITHUB_COMMIT_COUNT=$(curl -sI "https://api.github.com/repos/$REPO_OWNER/$REPO_NAME/commits?sha=$REPO_BRANCH&per_page=1" | grep -i '^link:' | sed -n 's/.*page=\([0-9]*\)>; rel="last".*/\1/p')

        KSU_VERSION=$((10000 + GITHUB_COMMIT_COUNT + 700))

        FAKE_HASH=$(curl -s "https://api.github.com/repos/$REPO_OWNER/$REPO_NAME/commits/$REPO_BRANCH" | grep '"sha":' | head -n 1 | sed -E 's/.*"([^"]+)".*/\1/' | cut -c1-8)

        KSU_VERSION_FULL="v${GITHUB_VERSION:-$KSU_VERSION_API}-${FAKE_HASH}@$REPO_BRANCH"

        echo "KSU_VERSION=$KSU_VERSION" >> $GITHUB_ENV
        echo "KSU_VERSION_FULL=$KSU_VERSION_FULL" >> $GITHUB_ENV

        echo "Branch: $REPO_BRANCH"
        echo "Version: $KSU_VERSION"
        echo "Full Version: $KSU_VERSION_FULL"

    - name: Build kernelsu.ko
      env:
        CI_KSU_VERSION: ${{ env.KSU_VERSION }}
        CI_KSU_VERSION_FULL: ${{ env.KSU_VERSION_FULL }}
      run: |
        git config --global --add safe.directory /__w/SukiSU-Ultra/SukiSU-Ultra

        cd kernel

        echo "=== Building kernelsu.ko for KMI: ${{ inputs.kmi }} ==="

        CONFIG_KSU=m CONFIG_KPROBES=y CONFIG_KSU_KPROBES_HOOK=y CONFIG_KSU_MANUAL_SU=y make
        
        echo "=== Build completed ==="

        # Create output directory in GitHub workspace
        mkdir -p /github/workspace/out

        # Copy with KMI-specific naming
        OUTPUT_NAME="${{ inputs.kmi }}_kernelsu.ko"
        cp kernelsu.ko "/github/workspace/out/$OUTPUT_NAME"
        
        echo "Copied to: /github/workspace/out/$OUTPUT_NAME"
        ls -la "/github/workspace/out/$OUTPUT_NAME"
        echo "Size: $(du -h "/github/workspace/out/$OUTPUT_NAME" | cut -f1)"
        llvm-strip -d "/github/workspace/out/$OUTPUT_NAME"
        echo "Size after stripping: $(du -h "/github/workspace/out/$OUTPUT_NAME" | cut -f1)"

    - name: Upload kernelsu.ko artifact
      uses: actions/upload-artifact@v4
      with:
        name: ${{ inputs.kmi }}-lkm
        path: /github/workspace/out/${{ inputs.kmi }}_kernelsu.ko