# notebook_to_pdf
# ----------------
# Convierte notebooks Jupyter a PDF usando nbconvert webpdf.
# Requiere nbconvert y playwright con chromium instalados.
#
# USO (sourced):
#   source notebook_to_pdf.sh
#   notebook_to_pdf /path/to/project
#   notebook_to_pdf /path/to/project "notebooks/*.ipynb" "notebooks/pdf/"

notebook_to_pdf() {
    local project_dir="$1"
    local pattern="${2:-notebooks/*.ipynb}"
    local output_dir="${3:-notebooks/pdf/}"

    if [ -z "$project_dir" ]; then
        echo "notebook_to_pdf: se requiere project_dir" >&2
        return 1
    fi

    if [ ! -d "$project_dir/.venv" ]; then
        echo "notebook_to_pdf: no existe .venv en $project_dir" >&2
        return 1
    fi

    # Crear directorio de salida si no existe
    mkdir -p "$project_dir/$output_dir"

    # Convertir notebooks a PDF con nbconvert webpdf
    # nbconvert puede retornar exit != 0 por warnings de validacion JSON
    # que no impiden la generacion del PDF, asi que ignoramos el exit code
    # y verificamos que los PDFs se hayan generado
    local nbconvert_output
    nbconvert_output=$(cd "$project_dir" && \
        .venv/bin/jupyter nbconvert \
            --to webpdf \
            --allow-chromium-download \
            --output-dir="$output_dir" \
            $pattern 2>&1) || true

    echo "$nbconvert_output"

    # Listar PDFs generados
    echo ""
    echo "PDFs generados en ${project_dir}/${output_dir}:"
    local pdf_count=0
    while IFS= read -r -d '' pdf; do
        echo "  $pdf"
        pdf_count=$((pdf_count + 1))
    done < <(find "$project_dir/$output_dir" -name "*.pdf" -print0 2>/dev/null)

    if [ "$pdf_count" -eq 0 ]; then
        echo "  (ninguno encontrado — nbconvert pudo haber fallado)" >&2
        echo "$nbconvert_output" >&2
        return 1
    fi

    echo "  Total: $pdf_count PDFs"
}