name: dependencies
description: 'Installs build dependencies with caching'

inputs:
  configuration:
    description: 'Build configuration (Debug, Release, etc.)'
    required: true
  build_dir:
    description: 'Directory to build dependencies in'
    required: false
    default: '.build'
  compiler-id:
    description: 'Unique identifier: compiler-version-stdlib[-gccversion] (e.g. clang-14-libstdcxx-gcc11, gcc-13-libstdcxx)'
    required: false
    default: ''
  cache_version:
    description: 'Cache version for invalidation'
    required: false
    default: '1'
  cache_enabled:
    description: 'Whether to use caching'
    required: false
    default: 'true'
  main_branch:
    description: 'Main branch name for restore keys'
    required: false
    default: 'dev'
  stdlib:
    description: 'C++ standard library for Conan configuration (note: also in compiler-id)'
    required: true
    type: choice
    options:
      - libstdcxx
      - libcxx

outputs:
  cache-hit:
    description: 'Whether there was a cache hit'
    value: ${{ steps.cache-restore-conan.outputs.cache-hit }}

runs:
  using: 'composite'
  steps:
    - name: Generate safe branch name
      if: inputs.cache_enabled == 'true'
      id: safe-branch
      shell: bash
      run: |
        SAFE_BRANCH=$(echo "${{ github.ref_name }}" | tr -c 'a-zA-Z0-9_.-' '-')
        echo "name=${SAFE_BRANCH}" >> $GITHUB_OUTPUT

    - name: Check conanfile changes
      if: inputs.cache_enabled == 'true'
      id: check-conanfile-changes
      shell: bash
      run: |
        # Check if we're on the main branch
        if [ "${{ github.ref_name }}" == "${{ inputs.main_branch }}" ]; then
          echo "should-save-conan-cache=true" >> $GITHUB_OUTPUT
        else
          # Fetch main branch for comparison
          git fetch origin ${{ inputs.main_branch }}
          
          # Check if conanfile.txt or conanfile.py has changed compared to main branch
          if git diff --quiet origin/${{ inputs.main_branch }}..HEAD -- '**/conanfile.txt' '**/conanfile.py'; then
            echo "should-save-conan-cache=false" >> $GITHUB_OUTPUT
          else
            echo "should-save-conan-cache=true" >> $GITHUB_OUTPUT
          fi
        fi

    - name: Restore Conan cache
      if: inputs.cache_enabled == 'true'
      id: cache-restore-conan
      uses: actions/cache/restore@v4
      with:
        path: |
          ~/.conan
          ~/.conan2
        # Note: compiler-id format is compiler-version-stdlib[-gccversion]
        key: ${{ runner.os }}-conan-v${{ inputs.cache_version }}-${{ inputs.compiler-id }}-${{ hashFiles('**/conanfile.txt', '**/conanfile.py') }}-${{ inputs.configuration }}
        restore-keys: |
          ${{ runner.os }}-conan-v${{ inputs.cache_version }}-${{ inputs.compiler-id }}-${{ hashFiles('**/conanfile.txt', '**/conanfile.py') }}-
          ${{ runner.os }}-conan-v${{ inputs.cache_version }}-${{ inputs.compiler-id }}-

    - name: Export custom recipes
      shell: bash
      run: |
        conan export external/snappy --version 1.1.10 --user xahaud --channel stable
        conan export external/soci --version 4.0.3 --user xahaud --channel stable
        conan export external/wasmedge --version 0.11.2 --user xahaud --channel stable

    - name: Install dependencies
      shell: bash
      env:
        CONAN_REQUEST_TIMEOUT: 180  # Increase timeout to 3 minutes for slow mirrors
      run: |
        # Create build directory
        mkdir -p ${{ inputs.build_dir }}
        cd ${{ inputs.build_dir }}
        
        # Install dependencies using conan
        conan install \
          --output-folder . \
          --build missing \
          --settings build_type=${{ inputs.configuration }} \
          ..

    - name: Save Conan cache
      if: always() && inputs.cache_enabled == 'true' && steps.cache-restore-conan.outputs.cache-hit != 'true' && steps.check-conanfile-changes.outputs.should-save-conan-cache == 'true'
      uses: actions/cache/save@v4
      with:
        path: |
          ~/.conan
          ~/.conan2
        key: ${{ steps.cache-restore-conan.outputs.cache-primary-key }}