use image::ImageFormat;
use pdfium_render::prelude::*;

pub fn main() -> Result<(), PdfiumError> {
    // For general comments about pdfium-render and binding to Pdfium, see export.rs.

    let pdfium = Pdfium::default();

    let document = pdfium.load_pdf_from_file("test/form-test.pdf", None)?; // Load the sample file...

    document
        .metadata()
        .iter()
        .enumerate()
        .for_each(|(index, tag)| println!("{}: {:#?} = {}", index, tag.tag_type(), tag.value()));

    match document.form() {
        Some(form) => println!(
            "PDF contains an embedded form of type {:#?}",
            form.form_type()
        ),
        None => println!("PDF does not contain an embedded form"),
    };

    let dpi = 200.0;

    let render_config = PdfRenderConfig::new()
        .scale_page_by_factor(dpi as f32 / 72.0)
        .render_form_data(true) // Rendering of form data and annotations is the default...
        .render_annotations(true) // ... but for the sake of demonstration we are explicit here.
        .highlight_text_form_fields(PdfColor::YELLOW.with_alpha(128))
        .highlight_checkbox_form_fields(PdfColor::BLUE.with_alpha(128));

    let mut page = document.pages().first().expect("to get first page");
    page.flatten()?;

    page.render_with_config(&render_config)?
        .as_image()
        .as_rgba8()
        .ok_or(PdfiumError::ImageError)?
        .save_with_format("flattened-form-page.jpg", ImageFormat::Jpeg)
        .map_err(|_| PdfiumError::ImageError)?;

    Ok(())
}