name: misc
on: [push, pull_request]
jobs:
  lint:
    name: miscellaneous checks
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v5
    - name: Setup Go
      uses: actions/setup-go@v6
      with:
          go-version: 1.25.x
          
    - name: Check for currency.NewPair(BTC, USD) used instead of currency.NewBTCUSD
      run: |
        grep -r -n --color=always -E "currency.NewPair\(currency.BTC, currency.USDT?\)" * || exit 0
        echo "::error::Replace currency.NewPair(BTC, USD*) with currency.NewBTCUSD*()"
        exit 1

    - name: Check for missing postfix `f` format func variant for testify assertions
      run: |
        grep -r -n -P --include="*.go" --color=always '(assert|require)\.[A-Za-z_]\w*?(?<!f)\((?:(?!fmt\.Sprintf).)*%.*' || exit 0
        echo "::error::Replace func with the `…f` func variant (e.g. Equalf, Errorf)"
        exit 1

    - name: Check for quoted and backticked %s usage in format specifier strings
      run: |
        grep -r -n --include='*.go' --color=always -E "[\`']%s[\`']" . || exit 0
        echo "::error::Replace '%s' or `%s` format specifier with %q"
        exit 1

    - name: Check for testify `require… "should"` and `assert… "must"` message consistency
      run: |
        exit_code=0
    
        echo "Checking for 'should' in require messages..."
        grep -r -n --include="*.go" --color=always -E 'require\.[A-Za-z0-9_]+.*"[^"]*should[^"]*"' . && exit_code=1 || true
 
        echo "Checking for 'must' in assert messages..."
        grep -r -n --include="*.go" --color=always -E 'assert\.[A-Za-z0-9_]+.*"[^"]*must[^"]*"' . && exit_code=1 || true

        if [ $exit_code -eq 1 ]; then
          echo "::error::Replace \"should\" in require messages and \"must\" in assert messages"
          exit 1
        fi
    
    - name: Check for errors.Is(err, nil) usage
      run: |
        grep -r -n --include='*_test.go' --color=always -E "errors.Is\([^,]+, nil" . || exit 0
        echo "::error::Replace errors.Is(err, nil) with testify equivalents"
        exit 1

    - name: Check for !errors.Is(err, target) usage
      run: |
        grep -r -n --include='*_test.go' --color=always -P '!errors\.Is\(\s*[^,]+\s*,\s*[^)]+\s*\)' . || exit 0
        echo "::error::Replace !errors.Is(err, target) with testify equivalents"
        exit 1

    - name: Check for LLM targeted invisible Unicode
      run: |
        WHITELIST=''
        if [[ -z "$WHITELIST" ]]; then
          PATTERN='(?!\x20)[\p{Cf}\p{Z}\p{M}]'
        else
          PATTERN="(?![\x20$WHITELIST])[\p{Cf}\p{Z}\p{M}]"
        fi
        grep -r -n -I --color=always --exclude-dir=.git -P "$PATTERN" . || exit 0
        echo "::error::Remove zero-width/format, separator or combining-mark characters"
        exit 1
        
    - name: Check configs JSON format
      run: |
        files=("config_example.json" "testdata/configtest.json")
        for file in "${files[@]}"; do
          processed_file="${file%.*}_processed.${file##*.}"
          jq '.exchanges |= sort_by(.name)' --indent 1 $file > $processed_file
          if ! diff $file $processed_file; then
            echo "jq differences found in $file! Please run 'make lint_configs'"
            exit 1
          else
            rm $processed_file
            echo "No differences found in $file 🌞"
          fi
        done
        
    - name: Check Go modernise tool issues
      run: |
        go run golang.org/x/tools/gopls/internal/analysis/modernize/cmd/modernize@latest -test ./...