name: Minify Lua Code

on:
  push:
    branches:
      - main
    paths:
      - 'src/**'
  pull_request:
    branches:
      - main
    paths:
      - 'src/**'

jobs:
  minify:
    runs-on: ubuntu-latest

    steps:
    - name: Checkout repository
      uses: actions/checkout@v2

    - name: Install Lua
      run: |
        sudo apt-get update
        sudo apt-get install -y lua5.3

    - name: Minify Lua files
      run: |
        mkdir -p release
        
        echo "Creating minification script..."
        cat > minify_script.lua << 'EOL'
        local minify = loadfile("minify.lua")()
        local lfs = require("lfs")
        
        local files = {}
        
        local function scanDir(dir, baseDir)
          baseDir = baseDir or ""
          for file in lfs.dir(dir) do
            if file ~= "." and file ~= ".." then
              local fullPath = dir .. "/" .. file
              local attr = lfs.attributes(fullPath)
              if attr.mode == "directory" then
                scanDir(fullPath, baseDir .. file .. "/")
              elseif file:match("%.lua$") then
                table.insert(files, {
                  path = baseDir .. file,
                  fullPath = fullPath
                })
              end
            end
          end
        end
        
        scanDir("src")
        
        local output = {
          'local minified = true\n',
          'local project = {}\n',
          'local baseRequire = require\n',
          'require = function(path) return project[path] or baseRequire(path) end\n'
        }
        
        for _, file in ipairs(files) do
          local f = io.open(file.fullPath, "r")
          local content = f:read("*all")
          f:close()
          
          local success, minified = minify(content)
          if not success then
            print("Failed to minify " .. file.path)
            print(minified)
            os.exit(1)
          end
          
          table.insert(output, string.format(
            'project["%s"] = function(...) %s end\n',
            file.path, minified
          ))
        end
        
        table.insert(output, 'return project["main.lua"]')
        
        local out = io.open("release/basalt.lua", "w")
        out:write(table.concat(output))
        out:close()
        EOL
        
        echo "Installing LuaFileSystem..."
        sudo apt-get install -y lua-filesystem
        
        echo "Running minification..."
        if lua minify_script.lua; then
          echo "Minification successful"
          echo "Files processed:"
          find src -name "*.lua" | sed 's|^src/||'
        else
          echo "Minification failed"
          exit 1
        fi

    - name: Commit minified Lua file
      if: success()
      run: |
        if [ -s release/basalt.lua ]; then
          git config --global user.name 'github-actions[bot]'
          git config --global user.email 'github-actions[bot]@users.noreply.github.com'
          git add release/basalt.lua
          git commit -m 'Minify all Lua files into project bundle'
          git push
        else
          echo "Error: basalt.lua is empty or doesn't exist"
          exit 1
        fi
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}