//! Forms integration tests.
//!
//! This test module verifies PDF form handling including:
//! - AcroForm detection and parsing
//! - Form field extraction and validation
//! - Widget annotation processing
//! - Form data encoding/decoding

use std::path::{Path, PathBuf};
use walkdir::WalkDir;
use pdftract_core::extract::{extract_pdf, ExtractionOptions};

/// Discover all PDF files in the given directory recursively.
///
/// # Arguments
/// * `fixtures_path` - Path to the fixtures directory to search
///
/// # Returns
/// A `Vec<PathBuf>` containing paths to all discovered PDF files
pub fn discover_pdf_fixtures<P: AsRef<Path>>(fixtures_path: P) -> Vec<PathBuf> {
    let mut pdf_files = Vec::new();

    let walker = WalkDir::new(fixtures_path)
        .follow_links(false)
        .into_iter()
        .filter_map(|e| e.ok())
        .filter(|e| {
            e.file_type().is_file()
                && e.path().extension().map(|ext| ext == "pdf").unwrap_or(false)
        })
        .map(|e| e.path().to_path_buf());

    pdf_files.extend(walker);
    pdf_files.sort();

    pdf_files
}

#[test]
fn test_discover_pdf_fixtures() {
    let fixtures_dir = "tests/fixtures/forms";
    let pdf_files = discover_pdf_fixtures(fixtures_dir);

    println!("\n=== Discovered PDF Fixtures ===");
    if pdf_files.is_empty() {
        println!("No PDF files found in {}", fixtures_dir);
    } else {
        for pdf_path in &pdf_files {
            println!("  - {}", pdf_path.display());
        }
        println!("Total: {} PDF file(s)", pdf_files.len());
    }
    println!("==============================\n");

    // Test that the function runs without errors
    // (We don't assert a count since fixtures may be added/removed)
    let _ = pdf_files;
}

#[test]
fn test_forms_extraction() {
    let fixtures_dir = "tests/fixtures/forms";
    let pdf_files = discover_pdf_fixtures(fixtures_dir);

    println!("\n=== Forms Extraction Test ===");
    if pdf_files.is_empty() {
        println!("No PDF files found in {} - skipping extraction test", fixtures_dir);
        println!("================================\n");
        return;
    }

    let mut extracted_count = 0;
    let mut failed_count = 0;

    for pdf_path in &pdf_files {
        println!("Extracting: {}", pdf_path.display());

        match extract_pdf(pdf_path, &ExtractionOptions::default()) {
            Ok(result) => {
                println!("  ✓ Successfully extracted");
                println!("    - {} pages", result.page_count);
                println!("    - Has forms: {}", result.has_forms);

                // Convert to JSON to ensure JSON serialization works
                match pdftract_core::extract::result_to_json(&result) {
                    Ok(json) => {
                        println!("    - JSON output size: {} bytes", json.to_string().len());
                        extracted_count += 1;
                    }
                    Err(e) => {
                        println!("  ✗ JSON conversion failed: {}", e);
                        failed_count += 1;
                    }
                }
            }
            Err(e) => {
                println!("  ✗ Extraction failed: {}", e);
                failed_count += 1;
            }
        }
        println!();
    }

    println!("================================");
    println!("Summary: {} extracted, {} failed", extracted_count, failed_count);
    println!("================================\n");

    // Don't fail the test if no fixtures exist yet
    if pdf_files.is_empty() {
        println!("No fixtures to test - creating scaffold");
    } else if failed_count > 0 {
        println!("WARNING: {} fixtures failed to extract", failed_count);
    }
}