name: Generate Documentation

on:
#  push:
#    branches: [ master, main ]
#    paths:
#      - 'src/**'
#      - 'extras/**'
#      - '.github/workflows/doxygen.yml'
#  pull_request:
#    branches: [ master, main ]
#    paths:
#      - 'src/**'
#      - 'extras/**'
#      - '.github/workflows/doxygen.yml'
  workflow_dispatch:

jobs:
  documentation:
    name: Generate Doxygen Documentation
    runs-on: ubuntu-latest

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

      - name: Install Doxygen
        run: |
          sudo apt-get update
          sudo apt-get install -y doxygen graphviz

      - name: Verify Doxygen installation
        run: |
          doxygen --version
          dot -V

      - name: Create Doxyfile configuration
        run: |
          cat > Doxyfile << 'EOF'
          # Doxyfile for TaskScheduler Library

          # Project information
          PROJECT_NAME           = "TaskScheduler"
          PROJECT_NUMBER         = "v4.0.0"
          PROJECT_BRIEF          = "Cooperative multitasking for Arduino and ESP platforms"
          PROJECT_LOGO           =

          # Output configuration
          OUTPUT_DIRECTORY       = ./doc
          CREATE_SUBDIRS         = YES
          ALLOW_UNICODE_NAMES    = NO

          # Build configuration
          EXTRACT_ALL            = YES
          EXTRACT_PRIVATE        = YES
          EXTRACT_PRIV_VIRTUAL   = YES
          EXTRACT_PACKAGE        = YES
          EXTRACT_STATIC         = YES
          EXTRACT_LOCAL_CLASSES  = YES
          EXTRACT_LOCAL_METHODS  = YES
          EXTRACT_ANON_NSPACES   = YES

          # Input configuration
          INPUT                  = ./src
          INPUT_ENCODING         = UTF-8
          FILE_PATTERNS          = *.h *.hpp *.cpp *.c
          RECURSIVE              = YES
          EXCLUDE                =
          EXCLUDE_SYMLINKS       = NO
          EXCLUDE_PATTERNS       =
          EXCLUDE_SYMBOLS        =

          # Source browsing
          SOURCE_BROWSER         = YES
          INLINE_SOURCES         = NO
          STRIP_CODE_COMMENTS    = YES
          REFERENCED_BY_RELATION = YES
          REFERENCES_RELATION    = YES
          REFERENCES_LINK_SOURCE = YES
          SOURCE_TOOLTIPS        = YES
          USE_HTAGS              = NO
          VERBATIM_HEADERS       = YES

          # Alphabetical class index
          ALPHABETICAL_INDEX     = YES
          COLS_IN_ALPHA_INDEX    = 5
          IGNORE_PREFIX          =

          # HTML output
          GENERATE_HTML          = YES
          HTML_OUTPUT            = html
          HTML_FILE_EXTENSION    = .html
          HTML_HEADER            =
          HTML_FOOTER            =
          HTML_STYLESHEET        =
          HTML_EXTRA_STYLESHEET  =
          HTML_EXTRA_FILES       =
          HTML_COLORSTYLE_HUE    = 220
          HTML_COLORSTYLE_SAT    = 100
          HTML_COLORSTYLE_GAMMA  = 80
          HTML_TIMESTAMP         = YES
          HTML_DYNAMIC_MENUS     = YES
          HTML_DYNAMIC_SECTIONS  = NO
          HTML_INDEX_NUM_ENTRIES = 100
          GENERATE_DOCSET        = NO
          GENERATE_HTMLHELP      = NO
          GENERATE_QHP           = NO
          GENERATE_ECLIPSEHELP   = NO
          DISABLE_INDEX          = NO
          GENERATE_TREEVIEW      = YES
          ENUM_VALUES_PER_LINE   = 4
          TREEVIEW_WIDTH         = 250
          EXT_LINKS_IN_WINDOW    = NO
          FORMULA_FONTSIZE       = 10
          FORMULA_TRANSPARENT    = YES
          USE_MATHJAX            = NO
          SEARCHENGINE           = YES
          SERVER_BASED_SEARCH    = NO
          EXTERNAL_SEARCH        = NO
          SEARCHENGINE_URL       =
          SEARCHDATA_FILE        = searchdata.xml
          EXTERNAL_SEARCH_ID     =
          EXTRA_SEARCH_MAPPINGS  =

          # LaTeX output (disabled)
          GENERATE_LATEX         = NO

          # RTF output (disabled)
          GENERATE_RTF           = NO

          # Man page output (disabled)
          GENERATE_MAN           = NO

          # XML output (disabled)
          GENERATE_XML           = NO

          # DOCBOOK output (disabled)
          GENERATE_DOCBOOK       = NO

          # AutoGen output (disabled)
          GENERATE_AUTOGEN_DEF   = NO

          # Perl module output (disabled)
          GENERATE_PERLMOD       = NO

          # Preprocessor configuration
          ENABLE_PREPROCESSING   = YES
          MACRO_EXPANSION        = YES
          EXPAND_ONLY_PREDEF     = NO
          SEARCH_INCLUDES        = YES
          INCLUDE_PATH           = ./src
          INCLUDE_FILE_PATTERNS  =
          PREDEFINED             = ARDUINO=300 \
                                   __TASK_INLINE=inline \
                                   _TASK_SLEEP_ON_IDLE_RUN \
                                   _TASK_STATUS_REQUEST \
                                   _TASK_WDT_IDS \
                                   _TASK_LTS_POINTER \
                                   _TASK_PRIORITY \
                                   _TASK_WDT_IDS \
                                   _TASK_TIMECRITICAL \
                                   _TASK_SCHEDULING_OPTIONS \
                                   _TASK_TIMEOUT \
                                   _TASK_OO_CALLBACKS \
                                   _TASK_DEBUG \
                                   _TASK_SELF_DESTRUCT \
                                   _TASK_STD_FUNCTION \
                                   _TASK_THREAD_SAFE \
                                   _TASK_EXPOSE_CHAIN
          EXPAND_AS_DEFINED      =
          SKIP_FUNCTION_MACROS   = YES

          # External references
          TAGFILES               =
          GENERATE_TAGFILE       =
          ALLEXTERNALS           = NO
          EXTERNAL_GROUPS        = YES
          EXTERNAL_PAGES         = YES

          # Dot tool configuration
          CLASS_DIAGRAMS         = YES
          MSCGEN_PATH            =
          DIA_PATH               =
          HIDE_UNDOC_RELATIONS   = YES
          HAVE_DOT               = YES
          DOT_NUM_THREADS        = 0
          DOT_FONTNAME           = Helvetica
          DOT_FONTSIZE           = 10
          DOT_FONTPATH           =
          CLASS_GRAPH            = YES
          COLLABORATION_GRAPH    = YES
          GROUP_GRAPHS           = YES
          UML_LOOK               = NO
          UML_LIMIT_NUM_FIELDS   = 10
          TEMPLATE_RELATIONS     = NO
          INCLUDE_GRAPH          = YES
          INCLUDED_BY_GRAPH      = YES
          CALL_GRAPH             = NO
          CALLER_GRAPH           = NO
          GRAPHICAL_HIERARCHY    = YES
          DIRECTORY_GRAPH        = YES
          DOT_IMAGE_FORMAT       = png
          INTERACTIVE_SVG        = NO
          DOT_PATH               =
          DOTFILE_DIRS           =
          MSCFILE_DIRS           =
          DIAFILE_DIRS           =
          PLANTUML_JAR_PATH      =
          PLANTUML_CFG_FILE      =
          PLANTUML_INCLUDE_PATH  =
          DOT_GRAPH_MAX_NODES    = 50
          MAX_DOT_GRAPH_DEPTH    = 0
          DOT_TRANSPARENT        = NO
          DOT_MULTI_TARGETS      = NO
          GENERATE_LEGEND        = YES
          DOT_CLEANUP            = YES

          # Configuration options related to warning and progress messages
          QUIET                  = NO
          WARNINGS               = YES
          WARN_IF_UNDOCUMENTED   = YES
          WARN_IF_DOC_ERROR      = YES
          WARN_NO_PARAMDOC       = NO
          WARN_AS_ERROR          = NO
          WARN_FORMAT            = "$file:$line: $text"
          WARN_LOGFILE           =
          EOF

      - name: Run Doxygen
        run: |
          echo "=== Running Doxygen Documentation Generation ==="
          doxygen Doxyfile

      - name: Add .nojekyll file
        run: touch ./doc/html/.nojekyll
  
      - name: Verify documentation generation
        run: |
          echo "=== Verifying Generated Documentation ==="
          if [ -d "./doc/html" ]; then
            echo "✓ HTML documentation generated successfully"
            echo "Documentation files:"
            ls -la ./doc/html/ | head -10
            echo "..."
            echo "Total files: $(find ./doc/html -type f | wc -l)"

            # Check for main files
            if [ -f "./doc/html/index.html" ]; then
              echo "✓ Main index.html found"
            else
              echo "✗ Main index.html not found"
              exit 1
            fi

            if [ -f "./doc/html/annotated.html" ]; then
              echo "✓ Class list found"
            else
              echo "✗ Class list not found"
            fi

            # Check documentation size
            doc_size=$(du -sh ./doc/html | cut -f1)
            echo "Documentation size: $doc_size"

          else
            echo "✗ Documentation generation failed - no output directory found"
            exit 1
          fi

      - name: Upload documentation artifacts
        uses: actions/upload-artifact@v4
        with:
          name: doxygen-documentation
          path: ./doc/
          retention-days: 30

      - name: Deploy to GitHub Pages
        if: github.ref == 'refs/heads/master'
        uses: peaceiris/actions-gh-pages@v3
        with:
          deploy_key: ${{ secrets.DEPLOY_KEY }}
          external_repository: arkhipenko/arkhipenko.github.io
          publish_dir: ./doc/html
          destination_dir: ts
          publish_branch: gh-pages
          user_name: 'github-actions[bot]'
          user_email: 'github-actions[bot]@users.noreply.github.com'
          commit_message: 'Update TaskScheduler documentation'

      - name: Create documentation summary
        run: |
          echo "=== Documentation Generation Summary ===" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "**Documentation successfully generated!**" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "- 📁 Output directory: \`./doc/html/\`" >> $GITHUB_STEP_SUMMARY
          echo "- 📄 Main entry point: \`./doc/html/index.html\`" >> $GITHUB_STEP_SUMMARY
          echo "- 📊 Total files: $(find ./doc/html -type f | wc -l)" >> $GITHUB_STEP_SUMMARY
          echo "- 💾 Documentation size: $(du -sh ./doc/html | cut -f1)" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          if [ "${{ github.event_name }}" = "push" ] && [ "${{ github.ref }}" = "refs/heads/master" ]; then
            echo "- 🚀 **Deployed to:** https://arkhipenko.github.io/TaskScheduler/" >> $GITHUB_STEP_SUMMARY
            echo "" >> $GITHUB_STEP_SUMMARY
          fi
          echo "**Key Documentation Pages:**" >> $GITHUB_STEP_SUMMARY
          echo "- 📋 [Class Index](./doc/html/annotated.html)" >> $GITHUB_STEP_SUMMARY
          echo "- 📁 [File Index](./doc/html/files.html)" >> $GITHUB_STEP_SUMMARY
          echo "- 🔍 [Search](./doc/html/search.html)" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "*Documentation artifacts have been uploaded and are available for download.*" >> $GITHUB_STEP_SUMMARY