main_analyzer.py

# main_analyzer.py
import fitz  # PyMuPDF
import os
import tempfile # Not strictly needed by analyze_pdf for input if app.py handles it
import re
import traceback
from typing import Tuple, Dict, Any, List
from collections import defaultdict

from pdf_processing import (
    extract_majority_font_text_directly,
    extract_plain_text_from_original_pdf,
    try_map_issues_to_page_rects
)
from content_analysis import (
    check_metadata, check_disclosures, check_figures_and_tables,
    check_references_summary, check_structure,
    check_figure_order, check_reference_order
)
from language_checker import perform_language_checks
from regex_checker import perform_regex_checks

def analyze_pdf(filepath_or_stream: Any) -> Tuple[Dict[str, Any], None]:
    original_pdf_access_path = None
    # temp_file_for_stream_path is for a scenario where analyze_pdf itself
    # might convert a stream input to a temp file. In the Gradio flow,
    # app.py provides a path, so this remains None.
    temp_file_for_stream_path = None
    doc_for_mapping = None

    try:
        if isinstance(filepath_or_stream, str):
            original_pdf_access_path = filepath_or_stream
            print(f"Analyzer: Input is a string path: {original_pdf_access_path}")
        # NOTE: If filepath_or_stream is NOT a string (e.g., a byte stream was passed directly
        # to analyze_pdf without app.py's temp file step), then original_pdf_access_path
        # would remain None here, and the check below would fail.
        # The fix in app.py ensures original_pdf_access_path gets the temp file path.

        if not original_pdf_access_path or not os.path.exists(original_pdf_access_path):
             return {"error": f"PDF path '{original_pdf_access_path}' (derived from input) does not exist or is invalid."}, None

        print(f"Analyzer: Extracting plain text from original PDF: {original_pdf_access_path}")
        raw_unfiltered_plain_text = extract_plain_text_from_original_pdf(original_pdf_access_path)

        pdf_size = os.path.getsize(original_pdf_access_path)
        if not raw_unfiltered_plain_text and pdf_size > 0 :
             print("Analyzer: Warning: Raw unfiltered plain text extraction yielded empty result. PDF might be image-based or have extraction issues.")

        cleaned_unfiltered_plain_text = re.sub(r'\s+', ' ', raw_unfiltered_plain_text.replace('\n', ' ')).strip()

        # 2. Font-Filtered Markdown (for LanguageTool checks)
        print(f"Analyzer: Extracting font-filtered markdown from: {original_pdf_access_path}")
        markdown_text_from_filtered_pdf = extract_majority_font_text_directly(original_pdf_access_path)
        print("markdown font print kar raha hun", markdown_text_from_filtered_pdf) # User's debug print
        if not markdown_text_from_filtered_pdf and pdf_size > 0 :
            print("Analyzer: Warning: Font-filtered Markdown extraction yielded empty result.")

        # 3. Perform all checks
        document_check_results = {
            "metadata": check_metadata(cleaned_unfiltered_plain_text),
            "disclosures": check_disclosures(cleaned_unfiltered_plain_text),
            "figures_and_tables": check_figures_and_tables(cleaned_unfiltered_plain_text),
            "references_summary": check_references_summary(cleaned_unfiltered_plain_text),
            "structure": check_structure(cleaned_unfiltered_plain_text),
            "figure_order_analysis": check_figure_order(cleaned_unfiltered_plain_text),
            "reference_order_analysis": check_reference_order(cleaned_unfiltered_plain_text),
            "plain_language_summary_present": bool(re.search(r'plain language summary', cleaned_unfiltered_plain_text, re.IGNORECASE)),
            "readability_issues_detected": False,
        }

        print("Analyzer: Performing regex checks...")
        regex_report = perform_regex_checks(cleaned_unfiltered_plain_text)
        if "error" in regex_report: print(f"Analyzer: Error in regex checks: {regex_report['error']}")
        regex_issues = regex_report.get("issues_list", [])

        print("Analyzer: Performing language checks...")
        lt_report = perform_language_checks(markdown_text_from_filtered_pdf)
        if "error" in lt_report: print(f"Analyzer: Error in LanguageTool checks: {lt_report['error']}")
        lt_issues = lt_report.get("issues_list", [])

        detailed_issues_for_mapping = regex_issues + lt_issues

        # 4. Coordinate Mapping (against the original PDF)
        if detailed_issues_for_mapping:
            try:
                # Use original_pdf_access_path which now holds the path to the (potentially temporary) PDF
                doc_for_mapping = fitz.open(original_pdf_access_path)
                if doc_for_mapping.page_count > 0:
                    print(f"Analyzer: Mapping {len(detailed_issues_for_mapping)} issues to PDF coordinates...")
                    # ... (rest of mapping logic as before) ...
                    for page_idx in range(doc_for_mapping.page_count):
                        page = doc_for_mapping[page_idx] # Current PyMuPDF page object
                        current_page_num_1_based = page_idx + 1
                        unmapped_issues_on_this_page_by_context = defaultdict(list)
                        for issue_dict in detailed_issues_for_mapping:
                            if not issue_dict['is_mapped_to_pdf']:
                                unmapped_issues_on_this_page_by_context[issue_dict['context_text']].append(issue_dict)

                        if not unmapped_issues_on_this_page_by_context:
                            if all(iss['is_mapped_to_pdf'] for iss in detailed_issues_for_mapping): break
                            continue

                        for ctx_str, issues_for_ctx in unmapped_issues_on_this_page_by_context.items():
                            if not ctx_str or not ctx_str.strip(): continue
                            try:
                                pdf_rects_for_context_occurrences = page.search_for(ctx_str, flags=fitz.TEXT_PRESERVE_LIGATURES | fitz.TEXT_PRESERVE_WHITESPACE)
                                if pdf_rects_for_context_occurrences:
                                    try_map_issues_to_page_rects(
                                        issues_for_ctx, 
                                        pdf_rects_for_context_occurrences, 
                                        current_page_num_1_based,
                                        page # Pass the current page object
                                    )
                            except Exception as search_exc:
                                print(f"Analyzer: Warning: Error searching for context '{ctx_str[:30].replace(chr(10),' ')}' on page {current_page_num_1_based}: {search_exc}")
                    total_mapped = sum(1 for iss in detailed_issues_for_mapping if iss['is_mapped_to_pdf'])
                    print(f"Analyzer: Finished coordinate mapping. Mapped issues: {total_mapped}/{len(detailed_issues_for_mapping)}.")
            except Exception as e_map:
                print(f"Analyzer: Error during PDF coordinate mapping: {e_map}\n{traceback.format_exc()}")
            # ensure doc_for_mapping is closed in the main finally block
        else:
            print("Analyzer: No detailed issues from regex or language checks to map.")

        # 5. Format final list of issues
        final_formatted_issues_list = []
        # ... (rest of formatting logic as before) ...
        for issue_data in detailed_issues_for_mapping:
            coords = issue_data.get('pdf_coordinates_list', [{}])[0] if issue_data.get('is_mapped_to_pdf') else {}
            coords_for_json = [coords.get("x0"), coords.get("y0"), coords.get("x1"), coords.get("y1")] if coords else []
            coords_for_json = [c for c in coords_for_json if c is not None]

            final_formatted_issues_list.append({
                "message": issue_data.get('message', 'N/A'),
                "context": issue_data.get('context_text', 'N/A'),
                "suggestions": issue_data.get('replacements_suggestion', []),
                "category": issue_data.get('category_name', 'Unknown'),
                "rule_id": issue_data.get('ruleId', 'N/A'),
                "offset": issue_data.get('offset_in_text', -1),
                "length": issue_data.get('error_length', 0),
                "coordinates": coords_for_json if len(coords_for_json) == 4 else [],
                "page": issue_data.get('mapped_page_number', 0) if issue_data.get('is_mapped_to_pdf') else 0,
                "source_check_type": issue_data.get('source_check_type', 'N/A')
            })

        results = {
            "issues": final_formatted_issues_list,
            "document_checks": document_check_results
        }
        return results, None
    except Exception as e:
        print(f"Overall analysis error in analyze_pdf: {e}\n{traceback.format_exc()}")
        return {"error": f"Overall analysis error: {str(e)}"}, None
    finally:
        # This finally block is for resources opened *within* analyze_pdf.
        # The temp file created by app.py is managed by app.py.
        # The temp_file_for_stream_path logic was for a temp file created by analyze_pdf
        # itself if it received a stream; this isn't happening in the Gradio flow.
        if doc_for_mapping: # Ensure the fitz document for mapping is closed
            doc_for_mapping.close()
            print(f"Analyzer: Closed fitz document used for mapping.")